Network Working Group M. Rose, Editor
Request for Comments: 1158 Performance Systems International
May 1990
Management Information Base for Network Management
of TCP/IP-based internets:
MIB-II
1. Status of this Memo
This memo defines the second version of the Management Information
Base (MIB-II) for use with network management protocols in TCP/IP-
based internets. In particular, together with its companion memos
which describe the structure of management information (RFC 1155)
along with the network management protocol (RFC 1157) for TCP/IP-
based internets, these documents provide a simple, workable
architecture and system for managing TCP/IP-based internets and in
particular the Internet community.
This document on MIB-II incorporates all of the technical content of
RFC 1156 on MIB-I and extends it, without loss of compatibilty.
However, MIB-I as described in RFC 1156 is full Standard Protocol of
the Internet, while the MIB-II described here is Proposed Standard
Protocol of the Internet.
This memo defines a mandatory extension to the base MIB (RFC 1156)
and is a Proposed Standard for the Internet community. The
extensions described here are currently Elective, but when they
become a standard, they will have the same status as RFC 1156, that
is, Recommended. The Internet Activities Board recommends that all
IP and TCP implementations be network manageable. This implies
implementation of the Internet MIB (RFC 1156 and the extensions in
RFC 1158) and at least one of the two recommended management
protocols SNMP (RFC 1157) or CMOT (RFC 1095).
This version of the MIB specification, MIB-II, is an incremental
refinement of MIB-I. As such, it has been designed according to two
criteria: first, changes have been made in response to new
operational requirements in the Internet; and, second, the changes
are entirely upwards compatible in order to minimize impact on the
network as the managed nodes in the Internet transition from MIB-I to
MIB-II.
It is expected that additional MIB groups and variables will be
defined over time to accommodate the monitoring and control needs of
new or changing components of the Internet.
IETF SNMP Working Group [Page 1]
RFC 1158 MIB II May 1990
Please refer to the latest edition of the "IAB Official Protocol
Standards" RFC for current information on the state and status of
standard Internet protocols.
Distribution of this memo is unlimited.
Table of Contents
1. Status of this Memo .................................. 1
2. Introduction ......................................... 3
3. Changes from MIB-I ................................... 4
3.1 Deprecated Objects .................................. 4
3.2 Display Strings ..................................... 5
3.3 The System Group .................................... 5
3.4 The Interfaces Group ................................ 5
3.5 The Address Translation Group ....................... 6
3.6 The IP Group ........................................ 7
3.7 The ICMP Group ...................................... 7
3.8 The TCP Group ....................................... 7
3.9 The UDP Group ....................................... 7
3.10 The EGP Group ...................................... 8
3.11 The Transmission Group ............................. 8
3.12 The SNMP Group ..................................... 8
4. Objects .............................................. 8
4.1 Object Groups ....................................... 9
4.2 Format of Definitions ............................... 10
5. Object Definitions ................................... 10
5.1 The System Group .................................... 11
5.2 The Interfaces Group ................................ 14
5.2.1 The Interfaces table .............................. 15
5.3 The Address Translation Group ....................... 27
5.4 The IP Group ........................................ 30
5.4.1 The IP Address table .............................. 38
5.4.2 The IP Routing table .............................. 41
5.4.3 The IP Address Translation table .................. 48
5.5 The ICMP Group ...................................... 51
5.6 The TCP Group ....................................... 61
5.6.1 The TCP Connection table .......................... 66
5.6.2 Additional TCP Objects ............................ 69
5.7 The UDP Group ....................................... 70
5.7.1 The UDP Listener table ............................ 72
5.8 The EGP Group ....................................... 73
5.8.1 The EGP Neighbor table ............................ 75
5.8.2 Additional EGP variables .......................... 83
5.9 The Transmission Group .............................. 83
5.10 The SNMP Group ..................................... 83
6. Definitions .......................................... 95
IETF SNMP Working Group [Page 2]
RFC 1158 MIB II May 1990
7. Identification of OBJECT instances for use with the
SNMP ................................................. 126
7.1 ifTable Object Type Names ........................... 127
7.2 atTable Object Type Names ........................... 127
7.3 ipAddrTable Object Type Names ....................... 128
7.4 ipRoutingTable Object Type Names .................... 128
7.5 ipNetToMediaTable Object Type Names ................. 129
7.6 tcpConnTable Object Type Names ...................... 129
7.7 udpTable Object Type Names .......................... 130
7.8 egpNeighTable Object Type Names ..................... 130
8. Acknowledgements .................................... 130
9. References .......................................... 131
10. Security Considerations.............................. 133
11. Author's Address..................................... 133
2. Introduction
As reported in RFC 1052, IAB Recommendations for the
Development of Internet Network Management Standards [1], a
two-prong strategy for network management of TCP/IP-based
internets was undertaken. In the short-term, the Simple
Network Management Protocol (SNMP) was to be used to manage
nodes in the Internet community. In the long-term, the use of
the OSI network management framework was to be examined. Two
documents were produced to define the management information:
RFC 1065, which defined the Structure of Management
Information (SMI) [2], and RFC 1066, which defined the
Management Information Base (MIB) [3]. Both of these
documents were designed so as to be compatible with both the
SNMP and the OSI network management framework.
This strategy was quite successful in the short-term:
Internet-based network management technology was fielded, by
both the research and commercial communities, within a few
months. As a result of this, portions of the Internet
community became network manageable in a timely fashion.
As reported in RFC 1109, Report of the Second Ad Hoc Network
Management Review Group [4], the requirements of the SNMP and
the OSI network management frameworks were more different than
anticipated. As such, the requirement for compatibility
between the SMI/MIB and both frameworks was suspended. This
action permitted the operational network management framework,
the SNMP, to respond to new operational needs in the Internet
community by producing this document.
As such, the current network management framework for TCP/IP-
based internets consists of: Structure and Identification of
IETF SNMP Working Group [Page 3]
RFC 1158 MIB II May 1990
Management Information for TCP/IP-based internets, RFC 1155 [13],
which describes how managed objects contained in the MIB are
defined; Management Information Base for Network Management of
TCP/IP-based internets (version 2), this memo, which describes
the managed objects contained in the MIB; and, the Simple
Network Management Protocol, RFC 1157 [14], which defines the
protocol used to manage these objects.
Consistent with the IAB directive to produce simple, workable
systems in the short-term, the list ofc objects (e.g., for BSD UNIX)
were excluded.
7) It was agreed to avoid heavily instrumenting critical
sections of code. The general guideline was one counter
per critical section per layer.
3. Changes from MIB-I
Features of this MIB include:
1) incremental additions to reflect new operational
requirements;
2) upwards compatibility with the SMI/MIB and the SNMP;
3) improved support for multi-protocol entities; and,
4) textual clean-up of the MIB to improve clarity and
readability.
The objects defined in MIB-II have the OBJECT IDENTIFIER prefix:
mib-2 OBJECT IDENTIFIER ::= { mgmt 1 }
3.1. Deprecated Objects
In order to better prepare implementors for future changes in the
MIB, a new term "deprecated" may be used when describing an object.
A deprecated object in the MIB is one which must be supported, but
one which will most likely be removed from the next version of the
MIB (e.g., MIB-III).
MIB-II marks one object as being deprecated:
atTable
As a result of deprecating the atTable object, the entire Address
Translation group is deprecated.
IETF SNMP Working Group [Page 4]
RFC 1158 MIB II May 1990
Note that no functionality is lost with the deprecation of these
objects: new objects providing equivalent or superior functionality
are defined in MIB-II.
3.2. Display Strings
In the past, there have been misinterpretations of the MIB as to when
a string of octets should contain printable characters, meant to be
displayed to a human. As a textual convention in the MIB, the
datatype
DisplayString ::= OCTET STRING
is introduced. A DisplayString is restricted to the NVT ASCII
character set, as defined in pages 10-11 of [7].
The following objects are now defined in terms of DisplayString:
sysDescr
ifDescr
It should be noted that this change has no effect on either the
syntax nor semantics of these objects. The use of the DisplayString
notation is merely an artifact of the explanatory method used in
MIB-II and future MIBs.
Further, it should be noted that any object defined in terms of OCTET
STRING may contain arbitrary binary data, in which each octet may
take any value from 0 to 255 (decimal).
3.3. The System Group
Four new objects are added to this group:
sysContact
sysName
sysLocation
sysServices
These provide contact, administrative, location, and service
information regarding the managed node.
3.4. The Interfaces Group
The definition of the ifNumber object was incorrect, as it required
all interfaces to support IP. (For example, devices without IP, such
as MAC-layer bridges, could not be managed if this definition was
strictly followed.) The description of the ifNumber object is changed
IETF SNMP Working Group [Page 5]
RFC 1158 MIB II May 1990
accordingly.
The ifTable object was mistaken marked as read-write, it has been
(correctly) re-designated as read-only. In addition, several new
values have been added to the ifType column in the ifTable object:
ppp(23)
softwareLoopback(24)
eon(25)
ethernet-3Mbit(26)
nsip(27)
slip(28)
Finally, a new column has been added to the ifTable object:
ifSpecific
which provides information about information specific to the media
being used to realize the interface.
3.5. The Address Translation Group
In MIB-I, this group contained a table which permitted mappings from
network addresses (e.g., IP addresses) to physical addresses (e.g.,
MAC addresses). Experience has shown that efficient implementations
of this table make two assumptions: a single network protocol
environment, and mappings occur only from network address to physical
address.
The need to support multi-protocol nodes (e.g., those with both the
IP and CLNP active), and the need to support the inverse mapping
(e.g., for ES-IS), have invalidated both of these assumptions. As
such, the atTable object is declared deprecated.
In order to meet both the multi-protocol and inverse mapping
requirements, MIB-II and its successors will allocate up to two
address translation tables inside each network protocol group. That
is, the IP group will contain one address translation table, for
going from IP addresses to physical addresses. Similarly, when a
document defining MIB objects for the CLNP is produced (e.g., [8]),
it will contain two tables, for mappings in both directions, as this
is required for full functionality.
It should be noted that the choice of two tables (one for each
direction of mapping) provides for ease of implementation in many
cases, and does not introduce undue burden on implementations which
realize the address translation abstraction through a single internal
table.
IETF SNMP Working Group [Page 6]
RFC 1158 MIB II May 1990
3.6. The IP Group
The access attribute of the variable ipForwarding has been changed
from read-only to read-write.
In addition, there is a new column to the ipAddrTable object,
ipAdEntReasmMaxSize
which keeps track of the largest IP datagram that can be re-
assembled on a particular interface. There is also a new column in
the ipRoutingTable object,
ipRouteMask
which is used for IP routing subsystems that support arbitrary subnet
masks.
One new object is added to the IP group:
ipNetToMediaTable
which is the address translation table for the IP group (providing
identical functionality to the now deprecated atTable in the address
translation group).
3.7. The ICMP Group
There are no changes to this group.
3.8. The TCP Group
Two new variables are added:
tcpInErrs
tcpOutRsts
which keep track of the number of incoming TCP segments in error and
the number of resets generated by a TCP.
3.9. The UDP Group
A new table:
udpTable
is added.
IETF SNMP Working Group [Page 7]
RFC 1158 MIB II May 1990
3.10. The EGP Group
Experience has indicated a need for additional objects that are
useful in EGP monitoring. In addition to making several additions to
the egpNeighborTable object, a new variable is added:
egpAs
which gives the autonomous system associated with this EGP entity.
3.11. The Transmission Group
MIB-I was lacking in that it did not distinguish between different
types of transmission media. A new group, the Transmission group, is
allocated for this purpose:
transmission OBJECT IDENTIFIER ::= { mib-2 10 }
When Internet-standard definitions for managing transmission media
are defined, the transmission group is used to provide a prefix for
the names of those objects.
Typically, such definitions reside in the experimental portion of the
MIB until they are "proven", then as a part of the Internet
standardization process, the definitions are accordingly elevated and
a new object identifier, under the transmission group is defined. By
convention, the name assigned is:
type OBJECT IDENTIFIER ::= { transmission number }
where "type" is the symbolic value used for the media in the ifType
column of the ifTable object, and "number" is the actual integer
value corresponding to the symbol.
3.12. The SNMP Group
The application-oriented working groups of the IETF have been tasked
to be receptive towards defining MIB variables specific to their
respective applications.
For the SNMP, it is useful to have statistical information. A new
group, the SNMP group, is allocated for this purpose:
snmp OBJECT IDENTIFIER ::= { mib-2 11 }
4. Objects
Managed objects are accessed via a virtual information store, termed
IETF SNMP Working Group [Page 8]
RFC 1158 MIB II May 1990
the Management Information Base or MIB. Objects in the MIB are
defined using Abstract Syntax Notation One (ASN.1) [9].
The mechanisms used for describing these objects are specified the
companion memo, the SMI. In particular, each object has a name, a
syntax, and an encoding. The name is an object identifier, an
administratively assigned name, which specifies an object type. The
object type together with an object instance serves to uniquely
identify a specific instantiation of the object. For human
convenience, we often use a textual string, termed the OBJECT
DESCRIPTOR, to also refer to the object type.
The syntax of an object type defines the abstract data structure
corresponding to that object type. The ASN.1 language is used for
this purpose. However, the companion memo purposely restricts the
ASN.1 constructs which may be used. These restrictions are
explicitly made for simplicity.
The encoding of an object type is simply how that object type is
represented using the object type's syntax. Implicitly tied to the
notion of an object type's syntax and encoding is how the object type
is represented when being transmitted on the network. This memo
specifies the use of the basic encoding rules (BER) of ASN.1 [10],
subject to the additional requirements imposed by the SNMP [14].
4.1. Object Groups
Since this list of managed objects contains only the essential
elements, there is no need to allow individual objects to be
optional. Rather, the objects are arranged into the following
groups:
- System
- Interfaces
- Address Translation (deprecated)
- IP
- ICMP
- TCP
- UDP
- EGP
- Transmission
- SNMP
There are two reasons for defining these groups: to provide a means
of assigning object identifiers; and, to provide a method for
implementations of managed agents to know which objects they must
implement. This method is as follows: if the semantics of a group is
applicable to an implementation, then it must implement all objects
IETF SNMP Working Group [Page 9]
RFC 1158 MIB II May 1990
in that group. For example, an implementation must implement the EGP
group if and only if it implements the EGP.
4.2. Format of Definitions
The next section contains the specification of all object types
contained in the MIB. Following the conventions of the companion
memo, the object types are defined using the following fields:
OBJECT:
-------
A textual name, termed the OBJECT DESCRIPTOR, for the
object type, along with its corresponding OBJECT
IDENTIFIER.
Syntax:
The abstract syntax for the object type, presented using
ASN.1. This must resolve to an instance of the ASN.1
type ObjectSyntax defined in the SMI.
Definition:
A textual description of the semantics of the object
type. Implementations should ensure that their
interpretation of the object type fulfills this
definition since this MIB is intended for use in multi-
vendor environments. As such it is vital that object
types have consistent meaning across all machines.
Access:
A keyword, one of read-only, read-write, write-only, or
not-accessible. Note that this designation specifies the
minimum level of support required. As a local matter,
implementations may support other access types (e.g., an
implementation may elect to permitting writing a variable
marked herein as read-only). Further, protocol-specific
"views" (e.g., those implied by an SNMP community) may
make further restrictions on access to a variable.
Status:
A keyword, one of mandatory, optional, obsolete, or
deprecated. Use of deprecated implies mandatory status.
5. Object Definitions
RFC1158-MIB
DEFINITIONS ::= BEGIN
IETF SNMP Working Group [Page 10]
RFC 1158 MIB II May 1990
IMPORTS
mgmt, OBJECT-TYPE, NetworkAddress, IpAddress,
Counter, Gauge, TimeTicks
FROM RFC1155-SMI;
DisplayString ::=
OCTET STRING
mib-2 OBJECT IDENTIFIER ::= { mgmt 1 } -- MIB-II
system OBJECT IDENTIFIER ::= { mib-2 1 }
interfaces OBJECT IDENTIFIER ::= { mib-2 2 }
at OBJECT IDENTIFIER ::= { mib-2 3 }
ip OBJECT IDENTIFIER ::= { mib-2 4 }
icmp OBJECT IDENTIFIER ::= { mib-2 5 }
tcp OBJECT IDENTIFIER ::= { mib-2 6 }
udp OBJECT IDENTIFIER ::= { mib-2 7 }
egp OBJECT IDENTIFIER ::= { mib-2 8 }
-- cmot OBJECT IDENTIFIER ::= { mib-2 9 }
transmission OBJECT IDENTIFIER ::= { mib-2 10 }
snmp OBJECT IDENTIFIER ::= { mib-2 11 }
END
5.1. The System Group
Implementation of the System group is mandatory for all systems.
OBJECT:
-------
sysDescr { system 1 }
Syntax:
DisplayString (SIZE (0..255))
Definition:
A textual description of the entity. This value should
include the full name and version identification of the
system's hardware type, software operating-system, and
networking software. It is mandatory that this only
contain printable ASCII characters.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 11]
RFC 1158 MIB II May 1990
OBJECT:
-------
sysObjectID { system 2 }
Syntax:
OBJECT IDENTIFIER
Definition:
The vendor's authoritative identification of the network
management subsystem contained in the entity. This value
is allocated within the SMI enterprises subtree
(1.3.6.1.4.1) and provides an easy and unambiguous means
for determining "what kind of box" is being managed. For
example, if vendor "Flintstones, Inc." was assigned the
subtree 1.3.6.1.4.1.4242, it could assign the identifier
1.3.6.1.4.1.4242.1.1 to its "Fred Router".
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
sysUpTime { system 3 }
Syntax:
TimeTicks
Definition:
The time (in hundredths of a second) since the network
management portion of the system was last re-initialized.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
sysContact { system 4 }
Syntax:
DisplayString (SIZE (0..255))
IETF SNMP Working Group [Page 12]
RFC 1158 MIB II May 1990
Definition:
The textual identification of the contact person for this
managed node, together with information on how to contact
this person.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
sysName { system 5 }
Syntax:
DisplayString (SIZE (0..255))
Definition:
An administratively-assigned name for this managed node.
By convention, this is the node's fully-qualified domain
name.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
sysLocation { system 6 }
Syntax:
DisplayString (SIZE (0..255))
Definition:
The physical location of this node (e.g., "telephone
closet, 3rd floor").
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 13]
RFC 1158 MIB II May 1990
OBJECT:
-------
sysServices { system 7 }
Syntax:
INTEGER (0..127)
Definition:
A value which indicates the set of services that this
entity potentially offers. The value is a sum. This
sum initially takes the value zero, Then, for each layer,
L, in the range 1 through 7, that this node performs
transactions for, 2 raised to (L - 1) is added to the
sum. For example, a node which performs only routing
functions would have a value of 4 (2^(3-1)). In
contrast, a node which is a host offering application
services would have a value of 72 (2^(4-1) + 2^(7-1)).
Note that in the context of the Internet suite of
protocols, values should be calculated accordingly:
layer functionality
1 physical (e.g., repeaters)
2 datalink/subnetwork (e.g., bridges)
3 internet (e.g., supports the IP)
4 end-to-end (e.g., supports the TCP)
7 applications (e.g., supports the SMTP)
For systems including OSI protocols, layers 5 and 6 may
also be counted.
Access:
read-only.
Status:
mandatory.
5.2. The Interfaces Group
Implementation of the Interfaces group is mandatory for all systems.
OBJECT:
-------
ifNumber { interfaces 1 }
Syntax:
INTEGER
IETF SNMP Working Group [Page 14]
RFC 1158 MIB II May 1990
Definition:
The number of network interfaces (regardless of their
current state) present on this system.
Access:
read-only.
Status:
mandatory.
5.2.1. The Interfaces table
The Interfaces table contains information on the entity's interfaces.
Each interface is thought of as being attached to a "subnetwork".
Note that this term should not be confused with "subnet" which refers
to an addressing partitioning scheme used in the Internet suite of
protocols.
OBJECT:
-------
ifTable { interfaces 2 }
Syntax:
SEQUENCE OF IfEntry
Definition:
A list of interface entries. The number of entries is
given by the value of ifNumber.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifEntry { ifTable 1 }
IETF SNMP Working Group [Page 15]
RFC 1158 MIB II May 1990
Syntax:
IfEntry ::= SEQUENCE {
ifIndex
INTEGER,
ifDescr
DisplayString,
ifType
INTEGER,
ifMtu
INTEGER,
ifSpeed
Gauge,
ifPhysAddress
OCTET STRING,
ifAdminStatus
INTEGER,
ifOperStatus
INTEGER,
ifLastChange
TimeTicks,
ifInOctets
Counter,
ifInUcastPkts
Counter,
ifInNUcastPkts
Counter,
ifInDiscards
Counter,
ifInErrors
Counter,
ifInUnknownProtos
Counter,
ifOutOctets
Counter,
ifOutUcastPkts
Counter,
ifOutNUcastPkts
Counter,
ifOutDiscards
Counter,
ifOutErrors
Counter,
ifOutQLen
Gauge,
ifSpecific
OBJECT IDENTIFIER
}
IETF SNMP Working Group [Page 16]
RFC 1158 MIB II May 1990
Definition:
An interface entry containing objects at the subnetwork
layer and below for a particular interface.
Access:
read-only.
Status:
mandatory.
We now consider the individual components of each interface
entry:
OBJECT:
-------
ifIndex { ifEntry 1 }
Syntax:
INTEGER
Definition:
A unique value for each interface. Its value ranges
between 1 and the value of ifNumber. The value for each
interface must remain constant at least from one re-
initialization of the entity's network management system
to the next re-initialization.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifDescr { ifEntry 2 }
Syntax:
DisplayString (SIZE (0..255))
Definition:
A textual string containing information about the
interface. This string should include the name of the
manufacturer, the product name and the version of the
hardware interface.
IETF SNMP Working Group [Page 17]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifType { ifEntry 3 }
Syntax:
INTEGER {
other(1), -- none of the following
regular1822(2),
hdh1822(3),
ddn-x25(4),
rfc877-x25(5),
ethernet-csmacd(6),
iso88023-csmacd(7),
iso88024-tokenBus(8),
iso88025-tokenRing(9),
iso88026-man(10),
starLan(11),
proteon-10Mbit(12),
proteon-80Mbit(13),
hyperchannel(14),
fddi(15),
lapb(16),
sdlc(17),
t1-carrier(18),
cept(19), -- european equivalent of T-1
basicISDN(20),
primaryISDN(21),
-- proprietary serial
propPointToPointSerial(22),
ppp(23),
softwareLoopback(24),
eon(25), -- CLNP over IP [12]
ethernet-3Mbit(26)
nsip(27), -- XNS over IP
slip(28) -- generic SLIP
}
Definition:
The type of interface, distinguished according to the
physical/link protocol(s) immediately "below" the network
layer in the protocol stack.
IETF SNMP Working Group [Page 18]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifMtu { ifEntry 4 }
Syntax:
INTEGER
Definition:
The size of the largest datagram which can be
sent/received on the interface, specified in octets. For
interfaces that are used for transmitting network
datagrams, this is the size of the largest network
datagram that can be sent on the interface.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifSpeed { ifEntry 5 }
Syntax:
Gauge
Definition:
An estimate of the interface's current bandwidth in bits
per second. For interfaces which do not vary in
bandwidth or for those where no accurate estimation can
be made, this object should contain the nominal
bandwidth.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 19]
RFC 1158 MIB II May 1990
OBJECT:
-------
ifPhysAddress { ifEntry 6 }
Syntax:
OCTET STRING
Definition:
The interface's address at the protocol layer immediately
"below" the network layer in the protocol stack. For
interfaces which do not have such an address (e.g., a
serial line), this object should contain an octet string
of zero length.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifAdminStatus { ifEntry 7 }
Syntax:
INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
Definition:
The desired state of the interface. The testing(3) state
indicates that no operational packets can be passed.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ifOperStatus { ifEntry 8 }
IETF SNMP Working Group [Page 20]
RFC 1158 MIB II May 1990
Syntax:
INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
Definition:
The current operational state of the interface. The
testing(3) state indicates that no operational packets
can be passed.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifLastChange { ifEntry 9 }
Syntax:
TimeTicks
Definition:
The value of sysUpTime at the time the interface entered
its current operational state. If the current state was
entered prior to the last re-initialization of the local
network management subsystem, then this object contains a
zero value.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifInOctets { ifEntry 10 }
Syntax:
Counter
IETF SNMP Working Group [Page 21]
RFC 1158 MIB II May 1990
Definition:
The total number of octets received on the interface,
including framing characters.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifInUcastPkts { ifEntry 11 }
Syntax:
Counter
Definition:
The number of subnetwork-unicast packets delivered to a
higher-layer protocol.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifInNUcastPkts { ifEntry 12 }
Syntax:
Counter
Definition:
The number of non-unicast (i.e., subnetwork-broadcast or
subnetwork-multicast) packets delivered to a higher-layer
protocol.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 22]
RFC 1158 MIB II May 1990
OBJECT:
-------
ifInDiscards { ifEntry 13 }
Syntax:
Counter
Definition:
The number of inbound packets which were chosen to be
discarded even though no errors had been detected to
prevent their being deliverable to a higher-layer
protocol. One possible reason for discarding such a
packet could be to free up buffer space.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifInErrors { ifEntry 14 }
Syntax:
Counter
Definition:
The number of inbound packets that contained errors
preventing them from being deliverable to a higher-layer
protocol.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifInUnknownProtos { ifEntry 15 }
Syntax:
Counter
IETF SNMP Working Group [Page 23]
RFC 1158 MIB II May 1990
Definition:
The number of packets received via the interface which
were discarded because of an unknown or unsupported
protocol.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutOctets { ifEntry 16 }
Syntax:
Counter
Definition:
The total number of octets transmitted out of the
interface, including framing characters.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutUcastPkts { ifEntry 17 }
Syntax:
Counter
Definition:
The total number of packets that higher-level protocols
requested be transmitted to a subnetwork-unicast address,
including those that were discarded or not sent.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 24]
RFC 1158 MIB II May 1990
OBJECT:
-------
ifOutNUcastPkts { ifEntry 18 }
Syntax:
Counter
Definition:
The total number of packets that higher-level protocols
requested be transmitted to a non-unicast (i.e., a
subnetwork-broadcast or subnetwork-multicast) address,
including those that were discarded or not sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutDiscards { ifEntry 19 }
Syntax:
Counter
Definition:
The number of outbound packets which were chosen to be
discarded even though no errors had been detected to
prevent their being transmitted. One possible reason for
discarding such a packet could be to free up buffer
space.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutErrors { ifEntry 20 }
Syntax:
Counter
IETF SNMP Working Group [Page 25]
RFC 1158 MIB II May 1990
Definition:
The number of outbound packets that could not be
transmitted because of errors.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifOutQLen { ifEntry 21 }
Syntax:
Gauge
Definition:
The length of the output packet queue (in packets).
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ifSpecific { ifEntry 22 }
Syntax:
OBJECT IDENTIFIER
Definition:
A reference to MIB definitions specific to the particular
media being used to realize the interface. For example,
if the interface is realized by an ethernet, then the
value of this object refers to a document defining
objects specific to ethernet. If an agent is not
configured to have a value for any of these variables,
the object identifier
nullSpecific OBJECT IDENTIFIER ::= { 0 0 }
is returned. Note that "nullSpecific" is a syntatically
valid object identifier, and any conformant
IETF SNMP Working Group [Page 26]
RFC 1158 MIB II May 1990
implementation of ASN.1 and BER must be able to generate
and recognize this value.
Access:
read-only.
Status:
mandatory.
5.3. The Address Translation Group
Implementation of the Address Translation group is mandatory for all
systems. Note however that this group is deprecated by MIB-II. That
is, it is being included solely for compatibility with MIB-I nodes,
and will most likely be excluded from MIB-III nodes. From MIB-II and
onwards, each network protocol group contains its own address
translation tables.
The Address Translation group contains one table which is the union
across all interfaces of the translation tables for converting a
NetworkAddress (e.g., an IP address) into a subnetwork-specific
address. For lack of a better term, this document refers to such a
subnetwork-specific address as a "physical" address.
Examples of such translation tables are: for broadcast media where
ARP is in use, the translation table is equivalent to the ARP cache;
or, on an X.25 network where non-algorithmic translation to X.121
addresses is required, the translation table contains the
NetworkAddress to X.121 address equivalences.
OBJECT:
-------
atTable { at 1 }
Syntax:
SEQUENCE OF AtEntry
Definition:
The Address Translation tables contain the NetworkAddress
to "physical" address equivalences. Some interfaces do
not use translation tables for determining address
equivalences (e.g., DDN-X.25 has an algorithmic method);
if all interfaces are of this type, then the Address
Translation table is empty, i.e., has zero entries.
Access:
read-write.
IETF SNMP Working Group [Page 27]
RFC 1158 MIB II May 1990
Status:
deprecated.
OBJECT:
-------
atEntry { atTable 1 }
Syntax:
AtEntry ::= SEQUENCE {
atIfIndex
INTEGER,
atPhysAddress
OCTET STRING,
atNetAddress
NetworkAddress
}
Definition:
Each entry contains one NetworkAddress to "physical"
address equivalence.
Access:
read-write.
Status:
deprecated.
We now consider the individual components of each Address
Translation table entry:
OBJECT:
-------
atIfIndex { atEntry 1 }
Syntax:
INTEGER
Definition:
The interface on which this entry's equivalence is
effective. The interface identified by a particular
value of this index is the same interface as identified
by the same value of ifIndex.
Access:
read-write.
IETF SNMP Working Group [Page 28]
RFC 1158 MIB II May 1990
Status:
deprecated.
OBJECT:
-------
atPhysAddress { atEntry 2 }
Syntax:
OCTET STRING
Definition:
The media-dependent "physical" address.
Setting this object to a null string (one of zero length) has
the effect of invaliding the corresponding entry in the
atTable object. That is, it effectively disassociates the
interface identified with said entry from the mapping
identified with said entry. It is an implementation-specific
matter as to whether the agent removes an invalidated entry
from the table. Accordingly, management stations must be
prepared to receive tabular information from agents that
corresponds to entries not currently in use. Proper
interpretation of such entries requires examination of the
relevant atPhysAddress object.
Access:
read-write.
Status:
deprecated.
OBJECT:
-------
atNetAddress { atEntry 3 }
Syntax:
NetworkAddress
Definition:
The NetworkAddress (e.g., the IP address) corresponding
to the media-dependent "physical" address.
Access:
read-write.
IETF SNMP Working Group [Page 29]
RFC 1158 MIB II May 1990
Status:
deprecated.
5.4. The IP Group
Implementation of the IP group is mandatory for all systems.
OBJECT:
-------
ipForwarding { ip 1 }
Syntax:
INTEGER {
forwarding(1), -- i.e., acting as a gateway
not-forwarding(2) -- i.e., NOT acting as a gateway
}
Definition:
The indication of whether this entity is acting as an IP
gateway in respect to the forwarding of datagrams
received by, but not addressed to, this entity. IP
gateways forward datagrams. IP hosts do not (except
those source-routed via the host).
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipDefaultTTL { ip 2 }
Syntax:
INTEGER
Definition:
The default value inserted into the Time-To-Live field of
the IP header of datagrams originated at this entity,
whenever a TTL value is not supplied by the transport
layer protocol.
Access:
read-write.
IETF SNMP Working Group [Page 30]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
ipInReceives { ip 3 }
Syntax:
Counter
Definition:
The total number of input datagrams received from
interfaces, including those received in error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInHdrErrors { ip 4 }
Syntax:
Counter
Definition:
The number of input datagrams discarded due to errors in
their IP headers, including bad checksums, version number
mismatch, other format errors, time-to-live exceeded,
errors discovered in processing their IP options, etc.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInAddrErrors { ip 5 }
Syntax:
Counter
IETF SNMP Working Group [Page 31]
RFC 1158 MIB II May 1990
Definition:
The number of input datagrams discarded because the IP
address in their IP header's destination field was not a
valid address to be received at this entity. This count
includes invalid addresses (e.g., 0.0.0.0) and addresses
of unsupported Classes (e.g., Class E). For entities
which are not IP Gateways and therefore do not forward
datagrams, this counter includes datagrams discarded
because the destination address was not a local address.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipForwDatagrams { ip 6 }
Syntax:
Counter
Definition:
The number of input datagrams for which this entity was
not their final IP destination, as a result of which an
attempt was made to find a route to forward them to that
final destination. In entities which do not act as IP
Gateways, this counter will include only those packets
which were Source-Routed via this entity, and the
Source-Route option processing was successful.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInUnknownProtos { ip 7 }
Syntax:
Counter
IETF SNMP Working Group [Page 32]
RFC 1158 MIB II May 1990
Definition:
The number of locally-addressed datagrams received
successfully but discarded because of an unknown or
unsupported protocol.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInDiscards { ip 8 }
Syntax:
Counter
Definition:
The number of input IP datagrams for which no problems
were encountered to prevent their continued processing,
but which were discarded (e.g., for lack of buffer
space). Note that this counter does not include any
datagrams discarded while awaiting re-assembly.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipInDelivers { ip 9 }
Syntax:
Counter
Definition:
The total number of input datagrams successfully
delivered to IP user-protocols (including ICMP).
Access:
read-only.
IETF SNMP Working Group [Page 33]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
ipOutRequests { ip 10 }
Syntax:
Counter
Definition:
The total number of IP datagrams which local IP user-
protocols (including ICMP) supplied to IP in requests for
transmission. Note that this counter does not include
any datagrams counted in ipForwDatagrams.
Access:
read-only.
Status:
mandatory.
OBJECT:
ipOutDiscards { ip 11 }
Syntax:
Counter
Definition:
The number of output IP datagrams for which no problem
was encountered to prevent their transmission to their
destination, but which were discarded (e.g., for lack of
buffer space). Note that this counter would include
datagrams counted in ipForwDatagrams if any such packets
met this (discretionary) discard criterion.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipOutNoRoutes { ip 12 }
IETF SNMP Working Group [Page 34]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The number of IP datagrams discarded because no route
could be found to transmit them to their destination.
Note that this counter includes any packets counted in
ipForwDatagrams which meet this "no-route" criterion.
Note that this includes any datagarms which a host cannot
route because all of its default gateways are down.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipReasmTimeout { ip 13 }
Syntax:
INTEGER
Definition:
The maximum number of seconds which received fragments
are held while they are awaiting reassembly at this
entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipReasmReqds { ip 14 }
Syntax:
Counter
Definition:
The number of IP fragments received which needed to be
reassembled at this entity.
IETF SNMP Working Group [Page 35]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipReasmOKs { ip 15 }
Syntax:
Counter
Definition:
The number of IP datagrams successfully re-assembled.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipReasmFails { ip 16 }
Syntax:
Counter
Definition:
The number of failures detected by the IP re-assembly
algorithm (for whatever reason: timed out, errors, etc).
Note that this is not necessarily a count of discarded IP
fragments since some algorithms (notably the algorithm in
RFC 815) can lose track of the number of fragments by
combining them as they are received.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 36]
RFC 1158 MIB II May 1990
OBJECT:
-------
ipFragOKs { ip 17 }
Syntax:
Counter
Definition:
The number of IP datagrams that have been successfully
fragmented at this entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipFragFails { ip 18 }
Syntax:
Counter
Definition:
The number of IP datagrams that have been discarded
because they needed to be fragmented at this entity but
could not be, e.g., because their "Don't Fragment" flag
was set.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipFragCreates { ip 19 }
Syntax:
Counter
Definition:
The number of IP datagram fragments that have been
generated as a result of fragmentation at this entity.
IETF SNMP Working Group [Page 37]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
5.4.1. The IP Address table
The Ip Address table contains this entity's IP addressing
information.
OBJECT:
-------
ipAddrTable { ip 20 }
Syntax:
SEQUENCE OF IpAddrEntry
Definition:
The table of addressing information relevant to this
entity's IP addresses.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipAddrEntry { ipAddrTable 1 }
Syntax:
IpAddrEntry ::= SEQUENCE {
ipAdEntAddr
IpAddress,
ipAdEntIfIndex
INTEGER,
ipAdEntNetMask
IpAddress,
ipAdEntBcastAddr
INTEGER,
ipAdEntReasmMaxSize
INTEGER (0..65535)
}
IETF SNMP Working Group [Page 38]
RFC 1158 MIB II May 1990
Definition:
The addressing information for one of this entity's IP
addresses.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipAdEntAddr { ipAddrEntry 1 }
Syntax:
IpAddress
Definition:
The IP address to which this entry's addressing
information pertains.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipAdEntIfIndex { ipAddrEntry 2 }
Syntax:
INTEGER
Definition:
The index value which uniquely identifies the interface
to which this entry is applicable. The interface
identified by a particular value of this index is the
same interface as identified by the same value of
ifIndex.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 39]
RFC 1158 MIB II May 1990
OBJECT:
-------
ipAdEntNetMask { ipAddrEntry 3 }
Syntax:
IpAddress
Definition:
The subnet mask associated with the IP address of this
entry. The value of the mask is an IP address with all
the network bits set to 1 and all the hosts bits set to
0.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipAdEntBcastAddr { ipAddrEntry 4 }
Syntax:
INTEGER
Definition:
The value of the least-significant bit in the IP
broadcast address used for sending datagrams on the
(logical) interface associated with the IP address of
this entry. For example, when the Internet standard
all-ones broadcast address is used, the value will be 1.
This value applies to both the subnet and network
broadcasts addresses used by the entity on this (logical)
interface.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipAdEntReasmMaxSize { ipAddrEntry 5 }
IETF SNMP Working Group [Page 40]
RFC 1158 MIB II May 1990
Syntax:
INTEGER (0..65535)
Definition:
The size of the largest IP datagram which this entity can
re-assemble from incoming IP fragmented datagrams
received on this interface.
Access:
read-only.
Status:
mandatory.
5.4.2. The IP Routing table
The IP Routing table contains an entry for each route presently known
to this entity.
OBJECT:
-------
ipRoutingTable { ip 21 }
Syntax:
SEQUENCE OF IpRouteEntry
Definition:
This entity's IP Routing table.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteEntry { ipRoutingTable 1 }
Syntax:
IpRouteEntry ::= SEQUENCE {
ipRouteDest
IpAddress,
ipRouteIfIndex
INTEGER,
ipRouteMetric1
IETF SNMP Working Group [Page 41]
RFC 1158 MIB II May 1990
INTEGER,
ipRouteMetric2
INTEGER,
ipRouteMetric3
INTEGER,
ipRouteMetric4
INTEGER,
ipRouteNextHop
IpAddress,
ipRouteType
INTEGER,
ipRouteProto
INTEGER,
ipRouteAge
INTEGER,
ipRouteMask
IpAddress
}
Definition:
A route to a particular destination.
Access:
read-write.
Status:
mandatory.
We now consider the individual components of each route in the
IP Routing table:
OBJECT:
-------
ipRouteDest { ipRouteEntry 1 }
Syntax:
IpAddress
Definition:
The destination IP address of this route. An entry with
a value of 0.0.0.0 is considered a default route.
Multiple routes to a single destination can appear in the
table, but access to such multiple entries is dependent
on the table-access mechanisms defined by the network
management protocol in use.
IETF SNMP Working Group [Page 42]
RFC 1158 MIB II May 1990
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteIfIndex { ipRouteEntry 2 }
Syntax:
INTEGER
Definition:
The index value which uniquely identifies the local
interface through which the next hop of this route should
be reached. The interface identified by a particular
value of this index is the same interface as identified
by the same value of ifIndex.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteMetric1 { ipRouteEntry 3 }
Syntax:
INTEGER
Definition:
The primary routing metric for this route. The semantics
of this metric are determined by the routing-protocol
specified in the route's ipRouteProto value. If this
metric is not used, its value should be set to -1.
Access:
read-write.
Status:
mandatory.
IETF SNMP Working Group [Page 43]
RFC 1158 MIB II May 1990
OBJECT:
-------
ipRouteMetric2 { ipRouteEntry 4 }
Syntax:
INTEGER
Definition:
An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipRouteProto value. If
this metric is not used, its value should be set to -1.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteMetric3 { ipRouteEntry 5 }
Syntax:
INTEGER
Definition:
An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipRouteProto value. If
this metric is not used, its value should be set to -1.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteMetric4 { ipRouteEntry 6 }
Syntax:
INTEGER
IETF SNMP Working Group [Page 44]
RFC 1158 MIB II May 1990
Definition:
An alternate routing metric for this route. The
semantics of this metric are determined by the routing-
protocol specified in the route's ipRouteProto value. If
this metric is not used, its value should be set to -1.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteNextHop { ipRouteEntry 7 }
Syntax:
IpAddress
Definition:
The IP address of the next hop of this route. (In the
case of a route bound to an interface which is realized
via a broadcast media, the value of this field is the
agent's IP address on that interface.)
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteType { ipRouteEntry 8 }
Syntax:
INTEGER {
other(1), -- none of the following
invalid(2), -- an invalidated route
-- route to directly
direct(3), -- connected (sub-)network
-- route to a non-local
remote(4) -- host/network/sub-network
IETF SNMP Working Group [Page 45]
RFC 1158 MIB II May 1990
}
Definition:
The type of route.
Setting this object to the value invalid(2) has the effect of
invalidating the corresponding entry in the ipRoutingTable
object. That is, it effectively disassociates the destination
identified with said entry from the route identified with said
entry. It is an implementation-specific matter as to whether
the agent removes an invalidated entry from the table.
Accordingly, management stations must be prepared to receive
tabular information from agents that corresponds to entries
not currently in use. Proper interpretation of such entries
requires examination of the relevant ipRouteType object.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteProto { ipRouteEntry 9 }
Syntax:
INTEGER {
other(1), -- none of the following
-- non-protocol information,
-- e.g., manually configured
local(2), -- entries
-- set via a network management
netmgmt(3), -- protocol
-- obtained via ICMP,
icmp(4), -- e.g., Redirect
-- the remaining values are
-- all gateway routing protocols
egp(5),
ggp(6),
hello(7),
rip(8),
is-is(9),
IETF SNMP Working Group [Page 46]
RFC 1158 MIB II May 1990
es-is(10),
ciscoIgrp(11),
bbnSpfIgp(12),
ospf(13),
bgp(14)
}
Definition:
The routing mechanism via which this route was learned.
Inclusion of values for gateway routing protocols is not
intended to imply that hosts should support those
protocols.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
ipRouteAge { ipRouteEntry 10 }
Syntax:
INTEGER
Definition:
The number of seconds since this route was last updated
or otherwise determined to be correct. Note that no
semantics of "too old" can be implied except through
knowledge of the routing protocol by which the route was
learned.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipRouteMask { ipRouteEntry 11 }
Syntax:
IpAddress
IETF SNMP Working Group [Page 47]
RFC 1158 MIB II May 1990
Definition:
Indicate the mask to be logical-ANDed with the
destination address before being compared to the value in
the ipRouteDest field. For those systems that do not
support arbitrary subnet masks, an agent constructs the
value of the ipRouteMask by determining whether the value
of the correspondent ipRouteDest field belong to a
class-A, B, or C network, and then using one of:
mask network
255.0.0.0 class-A
255.255.0.0 class-B
255.255.255.0 class-C
If the value of the ipRouteDest is 0.0.0.0 (a default
route), then the mask value is also 0.0.0.0. It should
be noted that all IP routing subsystems implicitly use
this mechanism.
Access:
read-write.
Status:
mandatory.
5.4.3. The IP Address Translation table
The Address Translation tables contain the IpAddress to "physical"
address equivalences. Some interfaces do not use translation tables
for determining address equivalences (e.g., DDN-X.25 has an
algorithmic method); if all interfaces are of this type, then the
Address Translation table is empty, i.e., has zero entries.
OBJECT:
-------
ipNetToMediaTable { ip 22 }
Syntax:
SEQUENCE OF IpNetToMediaEntry
Definition:
The IP Address Translation table used for mapping from IP
addresses to physical addresses.
Access:
read-write.
IETF SNMP Working Group [Page 48]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
IpNetToMediaEntry { ipNetToMediaTable 1 }
Syntax:
IpNetToMediaEntry ::= SEQUENCE {
ipNetToMediaIfIndex
INTEGER,
ipNetToMediaPhysAddress
OCTET STRING,
ipNetToMediaNetAddress
IpAddress,
ipNetToMediaType
INTEGER
}
Definition:
Each entry contains one IpAddress to "physical" address
equivalence.
Access:
read-write.
Status:
mandatory.
We now consider the individual components of each IP Address
Translation table entry:
OBJECT:
-------
ipNetToMediaIfIndex { ipNetToMediaEntry 1 }
Syntax:
INTEGER
Definition:
The interface on which this entry's equivalence is
effective. The interface identified by a particular
value of this index is the same interface as identified
by the same value of ifIndex.
IETF SNMP Working Group [Page 49]
RFC 1158 MIB II May 1990
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipNetToMediaPhysAddress { ipNetToMediaEntry 2 }
Syntax:
OCTET STRING
Definition:
The media-dependent "physical" address.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipNetToMediaNetAddress { ipNetToMediaEntry 3 }
Syntax:
IpAddress
Definition:
The IpAddress corresponding to the media-dependent
"physical" address.
Access:
read-write.
Status:
mandatory.
OBJECT:
-------
ipNetToMediaType { ipNetToMediaEntry 4 }
Syntax:
INTEGER {
IETF SNMP Working Group [Page 50]
RFC 1158 MIB II May 1990
other(1), -- none of the following
invalid(2), -- an invalidated mapping
dynamic(3),
static(4)
}
Definition:
The type of mapping.
Setting this object to the value invalid(2) has the effect of
invalidating the corresponding entry in the ipNetToMediaTable.
That is, it effectively disassociates the interface identified
with said entry from the mapping identified with said entry.
It is an implementation-specific matter as to whether the
agent removes an invalidated entry from the table.
Accordingly, management stations must be prepared to receive
tabular information from agents that corresponds to entries
not currently in use. Proper interpretation of such entries
requires examination of the relevant ipNetToMediaType object.
Access:
read-write.
Status:
mandatory.
5.5. The ICMP Group
Implementation of the ICMP group is mandatory for all systems.
The ICMP group contains the ICMP input and output statistics.
OBJECT:
-------
icmpInMsgs { icmp 1 }
Syntax:
Counter
Definition:
The total number of ICMP messages which the entity
received. Note that this counter includes all those
counted by icmpInErrors.
IETF SNMP Working Group [Page 51]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInErrors { icmp 2 }
Syntax:
Counter
Definition:
The number of ICMP messages which the entity received but
determined as having ICMP-specific errors (bad ICMP
checksums, bad length, etc.).
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInDestUnreachs { icmp 3 }
Syntax:
Counter
Definition:
The number of ICMP Destination Unreachable messages
received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInTimeExcds { icmp 4 }
IETF SNMP Working Group [Page 52]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The number of ICMP Time Exceeded messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInParmProbs { icmp 5 }
Syntax:
Counter
Definition:
The number of ICMP Parameter Problem messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInSrcQuenchs { icmp 6 }
Syntax:
Counter
Definition:
The number of ICMP Source Quench messages received.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 53]
RFC 1158 MIB II May 1990
OBJECT:
-------
icmpInRedirects { icmp 7 }
Syntax:
Counter
Definition:
The number of ICMP Redirect messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInEchos { icmp 8 }
Syntax:
Counter
Definition:
The number of ICMP Echo (request) messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInEchoReps { icmp 9 }
Syntax:
Counter
Definition:
The number of ICMP Echo Reply messages received.
Access:
read-only.
IETF SNMP Working Group [Page 54]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
icmpInTimestamps { icmp 10 }
Syntax:
Counter
Definition:
The number of ICMP Timestamp (request) messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInTimestampReps { icmp 11 }
Syntax:
Counter
Definition:
The number of ICMP Timestamp Reply messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInAddrMasks { icmp 12 }
Syntax:
Counter
Definition:
The number of ICMP Address Mask Request messages
received.
IETF SNMP Working Group [Page 55]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInAddrMaskReps { icmp 13 }
Syntax:
Counter
Definition:
The number of ICMP Address Mask Reply messages received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutMsgs { icmp 14 }
Syntax:
Counter
Definition:
The total number of ICMP messages which this entity
attempted to send. Note that this counter includes all
those counted by icmpOutErrors.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutErrors { icmp 15 }
IETF SNMP Working Group [Page 56]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The number of ICMP messages which this entity did not
send due to problems discovered within ICMP such as a
lack of buffers. This value should not include errors
discovered outside the ICMP layer such as the inability
of IP to route the resultant datagram. In some
implementations there may be no types of error which
contribute to this counter's value.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutDestUnreachs { icmp 16 }
Syntax:
Counter
Definition:
The number of ICMP Destination Unreachable messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutTimeExcds { icmp 17 }
Syntax:
Counter
Definition:
The number of ICMP Time Exceeded messages sent.
Access:
read-only.
IETF SNMP Working Group [Page 57]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
icmpOutParmProbs { icmp 18 }
Syntax:
Counter
Definition:
The number of ICMP Parameter Problem messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutSrcQuenchs { icmp 19 }
Syntax:
Counter
Definition:
The number of ICMP Source Quench messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutRedirects { icmp 20 }
Syntax:
Counter
Definition:
The number of ICMP Redirect messages sent. For a host,
this object will always be zero, since hosts do not send
IETF SNMP Working Group [Page 58]
RFC 1158 MIB II May 1990
redirects.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutEchos { icmp 21 }
Syntax:
Counter
Definition:
The number of ICMP Echo (request) messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutEchoReps { icmp 22 }
Syntax:
Counter
Definition:
The number of ICMP Echo Reply messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutTimestamps { icmp 23 }
IETF SNMP Working Group [Page 59]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The number of ICMP Timestamp (request) messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutTimestampReps { icmp 24 }
Syntax:
Counter
Definition:
The number of ICMP Timestamp Reply messages sent.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpOutAddrMasks { icmp 25 }
Syntax:
Counter
Definition:
The number of ICMP Address Mask Request messages sent.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 60]
RFC 1158 MIB II May 1990
OBJECT:
-------
icmpOutAddrMaskReps { icmp 26 }
Syntax:
Counter
Definition:
The number of ICMP Address Mask Reply messages sent.
Access:
read-only.
Status:
mandatory.
5.6. The TCP Group
Implementation of the TCP group is mandatory for all systems that
implement the TCP.
Note that instances of object types that represent information about
a particular TCP connection are transient; they persist only as long
as the connection in question.
OBJECT:
-------
tcpRtoAlgorithm { tcp 1 }
Syntax:
INTEGER {
other(1), -- none of the following
constant(2), -- a constant rto
rsre(3), -- MIL-STD-1778, Appendix B
vanj(4) -- Van Jacobson's algorithm [11]
}
Definition:
The algorithm used to determine the timeout value used
for retransmitting unacknowledged octets.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 61]
RFC 1158 MIB II May 1990
OBJECT:
-------
tcpRtoMin { tcp 2 }
Syntax:
INTEGER
Definition:
The minimum value permitted by a TCP implementation for
the retransmission timeout, measured in milliseconds.
More refined semantics for objects of this type depend
upon the algorithm used to determine the retransmission
timeout. In particular, when the timeout algorithm is
rsre(3), an object of this type has the semantics of the
LBOUND quantity described in RFC 793.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpRtoMax { tcp 3 }
Syntax:
INTEGER
Definition:
The maximum value permitted by a TCP implementation for
the retransmission timeout, measured in milliseconds.
More refined semantics for objects of this type depend
upon the algorithm used to determine the retransmission
timeout. In particular, when the timeout algorithm is
rsre(3), an object of this type has the semantics of the
UBOUND quantity described in RFC 793.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 62]
RFC 1158 MIB II May 1990
OBJECT:
-------
tcpMaxConn { tcp 4 }
Syntax:
INTEGER
Definition:
The limit on the total number of TCP connections the
entity can support. In entities where the maximum number
of connections is dynamic, this object should contain the
value "-1".
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpActiveOpens { tcp 5 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the SYN-SENT state from the CLOSED state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpPassiveOpens { tcp 6 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the SYN-RCVD state from the LISTEN state.
IETF SNMP Working Group [Page 63]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpAttemptFails { tcp 7 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the CLOSED state from either the SYN-SENT
state or the SYN-RCVD state, plus the number of times TCP
connections have made a direct transition to the LISTEN
state from the SYN-RCVD state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpEstabResets { tcp 8 }
Syntax:
Counter
Definition:
The number of times TCP connections have made a direct
transition to the CLOSED state from either the
ESTABLISHED state or the CLOSE-WAIT state.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 64]
RFC 1158 MIB II May 1990
OBJECT:
-------
tcpCurrEstab { tcp 9 }
Syntax:
Gauge
Definition:
The number of TCP connections for which the current state
is either ESTABLISHED or CLOSE-WAIT.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpInSegs { tcp 10 }
Syntax:
Counter
Definition:
The total number of segments received, including those
received in error. This count includes segments received
on currently established connections.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpOutSegs { tcp 11 }
Syntax:
Counter
Definition:
The total number of segments sent, including those on
current connections but excluding those containing only
retransmitted octets.
IETF SNMP Working Group [Page 65]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpRetransSegs { tcp 12 }
Syntax:
Counter
Definition:
The total number of segments retransmitted - that is, the
number of TCP segments transmitted containing one or more
previously transmitted octets.
Access:
read-only.
Status:
mandatory.
5.6.1. The TCP Connection table
The TCP connection table contains information about this entity's
existing TCP connections.
OBJECT:
-------
tcpConnTable { tcp 13 }
Syntax:
SEQUENCE OF TcpConnEntry
Definition:
A table containing TCP connection-specific information.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 66]
RFC 1158 MIB II May 1990
OBJECT:
-------
tcpConnEntry { tcpConnTable 1 }
Syntax:
TcpConnEntry ::= SEQUENCE {
tcpConnState
INTEGER,
tcpConnLocalAddress
IpAddress,
tcpConnLocalPort
INTEGER (0..65535),
tcpConnRemAddress
IpAddress,
tcpConnRemPort
INTEGER (0..65535)
}
Definition:
Information about a particular current TCP connection.
An object of this type is transient, in that it ceases to
exist when (or soon after) the connection makes the
transition to the CLOSED state.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnState { tcpConnEntry 1 }
Syntax:
INTEGER {
closed(1),
listen(2),
synSent(3),
synReceived(4),
established(5),
finWait1(6),
finWait2(7),
closeWait(8),
lastAck(9),
closing(10),
timeWait(11)
IETF SNMP Working Group [Page 67]
RFC 1158 MIB II May 1990
}
Definition:
The state of this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnLocalAddress { tcpConnEntry 2 }
Syntax:
IpAddress
Definition:
The local IP address for this TCP connection. In the
case of a connection in the listen state which is willing
to accept connections for any IP interface associated
with the node, the value 0.0.0.0 is used.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnLocalPort { tcpConnEntry 3 }
Syntax:
INTEGER (0..65535)
Definition:
The local port number for this TCP connection.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 68]
RFC 1158 MIB II May 1990
OBJECT:
-------
tcpConnRemAddress { tcpConnEntry 4 }
Syntax:
IpAddress
Definition:
The remote IP address for this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnRemPort { tcpConnEntry 5 }
Syntax:
INTEGER (0..65535)
Definition:
The remote port number for this TCP connection.
Access:
read-only.
Status:
mandatory.
5.6.2. Additional TCP Objects
OBJECT:
-------
tcpInErrs { tcp 14 }
Syntax:
Counter
Definition:
The total number of segments received in error (e.g., bad
TCP checksums).
IETF SNMP Working Group [Page 69]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpOutRsts { tcp 15 }
Syntax:
Counter
Definition:
The number of TCP segments sent containing the RST flag.
Access:
read-only.
Status:
mandatory.
5.7. The UDP Group
Implementation of the UDP group is mandatory for all systems which
implement the UDP.
OBJECT:
-------
udpInDatagrams { udp 1 }
Syntax:
Counter
Definition:
The total number of UDP datagrams delivered to UDP users.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 70]
RFC 1158 MIB II May 1990
OBJECT:
-------
udpNoPorts { udp 2 }
Syntax:
Counter
Definition:
The total number of received UDP datagrams for which
there was no application at the destination port.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpInErrors { udp 3 }
Syntax:
Counter
Definition:
The number of received UDP datagrams that could not be
delivered for reasons other than the lack of an
application at the destination port.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpOutDatagrams { udp 4 }
Syntax:
Counter
Definition:
The total number of UDP datagrams sent from this entity.
IETF SNMP Working Group [Page 71]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
5.7.1. The UDP Listener table
The UDP listener table contains information about this entity's UDP
end-points on which a local application is currently accepting
datagrams.
OBJECT:
-------
udpTable { udp 5 }
Syntax:
SEQUENCE OF UdpEntry
Definition:
A table containing UDP listener information.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpEntry { udpTable 1 }
Syntax:
UdpEntry ::= SEQUENCE {
udpLocalAddress
IpAddress,
udpLocalPort
INTEGER (0..65535)
}
Definition:
Information about a particular current UDP listener.
Access:
read-only.
IETF SNMP Working Group [Page 72]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
udpLocalAddress { udpEntry 1 }
Syntax:
IpAddress
Definition:
The local IP address for this UDP listener. In the case
of a UDP listener which is willing to accept datagrams
for any IP interface associated with the node, the value
0.0.0.0 is used.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
udpLocalPort { udpEntry 2 }
Syntax:
INTEGER (0..65535)
Definition:
The local port number for this UDP listener.
Access:
read-only.
Status:
mandatory.
5.8. The EGP Group
Implementation of the EGP group is mandatory for all systems which
implement the EGP.
IETF SNMP Working Group [Page 73]
RFC 1158 MIB II May 1990
OBJECT:
-------
egpInMsgs { egp 1 }
Syntax:
Counter
Definition:
The number of EGP messages received without error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpInErrors { egp 2 }
Syntax:
Counter
Definition:
The number of EGP messages received that proved to be in
error.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpOutMsgs { egp 3 }
Syntax:
Counter
Definition:
The total number of locally generated EGP messages.
Access:
read-only.
IETF SNMP Working Group [Page 74]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
egpOutErrors { egp 4 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages not sent due
to resource limitations within an EGP entity.
Access:
read-only.
Status:
mandatory.
5.8.1. The EGP Neighbor table
The Egp Neighbor table contains information about this entity's EGP
neighbors.
OBJECT:
-------
egpNeighTable { egp 5 }
Syntax:
SEQUENCE OF EgpNeighEntry
Definition:
The EGP neighbor table.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighEntry { egpNeighTable 1 }
IETF SNMP Working Group [Page 75]
RFC 1158 MIB II May 1990
Syntax:
EgpNeighEntry ::= SEQUENCE {
egpNeighState
INTEGER,
egpNeighAddr
IpAddress,
egpNeighAs
INTEGER,
egpNeighInMsgs
Counter,
egpNeighInErrs
Counter,
egpNeighOutMsgs
Counter,
egpNeighOutErrs
Counter,
egpNeighInErrMsgs
Counter,
egpNeighOutErrMsgs
Counter,
egpNeighStateUps
Counter,
egpNeighStateDowns
Counter,
egpNeighIntervalHello
INTEGER,
egpNeighIntervalPoll
INTEGER,
egpNeighMode
INTEGER,
egpNeighEventTrigger
INTEGER
}
Definition:
Information about this entity's relationship with a
particular EGP neighbor.
Access:
read-only.
Status:
mandatory.
We now consider the individual components of each EGP neighbor
entry:
IETF SNMP Working Group [Page 76]
RFC 1158 MIB II May 1990
OBJECT:
-------
egpNeighState { egpNeighEntry 1 }
Syntax:
INTEGER {
idle(1),
acquisition(2),
down(3),
up(4),
cease(5)
}
Definition:
The EGP state of the local system with respect to this
entry's EGP neighbor. Each EGP state is represented by a
value that is one greater than the numerical value
associated with said state in RFC 904.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighAddr { egpNeighEntry 2 }
Syntax:
IpAddress
Definition:
The IP address of this entry's EGP neighbor.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighAs { egpNeighEntry 3 }
IETF SNMP Working Group [Page 77]
RFC 1158 MIB II May 1990
Syntax:
INTEGER
Definition:
The autonomous system of this EGP peer. Zero should be
specified if the autonomous system number of the neighbor
is not yet known.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInMsgs { egpNeighEntry 4 }
Syntax:
Counter
Definition:
The number of EGP messages received without error from
this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInErrs { egpNeighEntry 5 }
Syntax:
Counter
Definition:
The number of EGP messages received from this EGP peer
that proved to be in error (e.g., bad EGP checksum).
Access:
read-only.
IETF SNMP Working Group [Page 78]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
egpNeighOutMsgs { egpNeighEntry 6 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages to this EGP
peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighOutErrs { egpNeighEntry 7 }
Syntax:
Counter
Definition:
The number of locally generated EGP messages not sent to
this EGP peer due to resource limitations within an EGP
entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighInErrMsgs { egpNeighEntry 8 }
Syntax:
Counter
IETF SNMP Working Group [Page 79]
RFC 1158 MIB II May 1990
Definition:
The number of EGP-defined error messages received from
this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighOutErrMsgs { egpNeighEntry 9 }
Syntax:
Counter
Definition:
The number of EGP-defined error messages sent to this EGP
peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighStateUps { egpNeighEntry 10 }
Syntax:
Counter
Definition:
The number of EGP state transitions to the UP state with
this EGP peer.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 80]
RFC 1158 MIB II May 1990
OBJECT:
-------
egpNeighStateDowns { egpNeighEntry 11 }
Syntax:
Counter
Definition:
The number of EGP state transitions from the UP state to
any other state with this EGP peer.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighIntervalHello { egpNeighEntry 12 }
Syntax:
INTEGER
Definition:
The interval between EGP Hello command retransmissions
(in hundredths of a second). This represents the t1
timer as defined in RFC 904.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighIntervalPoll { egpNeighEntry 13 }
Syntax:
INTEGER
Definition:
The interval between EGP poll command retransmissions (in
hundredths of a second). This represents the t3 timer as
defined in RFC 904.
IETF SNMP Working Group [Page 81]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighMode { egpNeighEntry 14 }
Syntax:
INTEGER {
active(1),
passive(2)
}
Definition:
The polling mode of this EGP entity, either passive or
active.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
egpNeighEventTrigger { egpNeighEntry 15 }
Syntax:
INTEGER {
start(1),
stop(2)
}
Definition:
A control variable used to trigger operator-initiated
Start and Stop events. When read, this variable always
returns the most recent value that egpNeightEventTrigger
was set to. If it has not been set since the last
initialization of the network management subsystem on the
node, it returns a value of "stop".
Access:
read-write
IETF SNMP Working Group [Page 82]
RFC 1158 MIB II May 1990
Status:
mandatory.
5.8.2. Additional EGP variables
OBJECT:
-------
egpAs { egp 6 }
Syntax:
INTEGER
Definition:
The autonomous system number of this EGP entity.
Access:
read-only.
Status:
mandatory.
5.9. The Transmission Group
Based on the transmission media underlying each interface on a
system, the corresponding portion of the Transmission group is
mandatory for that system.
When Internet-standard definitions for managing transmission media
are defined, the transmission group is used to provide a prefix for
the names of those objects.
Typically, such definitions reside in the experimental portion of the
MIB until they are "proven", then as a part of the Internet
standardization process, the definitions are accordingly elevated and
a new object identifier, under the transmission group is defined. By
convention, the name assigned is:
type OBJECT IDENTIFIER ::= { transmission number }
where "type" is the symbolic value used for the media in the ifType
column of the ifTable object, and "number" is the actual integer
value corresponding to the symbol.
5.10. The SNMP Group
Implementation of the SNMP group is mandatory for all systems which
support an SNMP protocol entity. Some of the objects defined below
IETF SNMP Working Group [Page 83]
RFC 1158 MIB II May 1990
will be zero-valued in those SNMP implementations that are optimized
to support only those functions specific to either a management agent
or a management client.
OBJECT:
-------
snmpInPkts { snmp 1 }
Syntax:
Counter
Definition:
The total number of PDUs delivered to the SNMP entity
from the transport service.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutPkts { snmp 2 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs which were passed from the
SNMP protocol entity to the transport service.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadVersions { snmp 3 }
Syntax:
Counter
IETF SNMP Working Group [Page 84]
RFC 1158 MIB II May 1990
Definition:
The total number of syntactically correct SNMP PDUs which
were delivered to the SNMP protocol entity and were for
an unsupported SNMP version.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadCommunityNames { snmp 4 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which used a SNMP community name not
known to said entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadCommunityUses { snmp 5 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which represented an SNMP operation which
was not allowed by the SNMP community named in the PDU.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 85]
RFC 1158 MIB II May 1990
OBJECT:
-------
snmpInASNParseErrs { snmp 6 }
Syntax:
Counter
Definition:
The total number of ASN.1 parsing errors (either in
encoding or syntax) encountered by the SNMP protocol
entity when decoding received SNMP PDUs.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadTypes { snmp 7 }
Syntax:
Counter
Definition:
The total number of SNMP PDUs delivered to the SNMP
protocol entity which had an unknown PDU type.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTooBigs { snmp 8 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "tooBig."
IETF SNMP Working Group [Page 86]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInNoSuchNames { snmp 9 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "noSuchName."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInBadValues { snmp 10 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "badValue."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInReadOnlys { snmp 11 }
IETF SNMP Working Group [Page 87]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "readOnly."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGenErrs { snmp 12 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were delivered to
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "genErr."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInTotalReqVars { snmp 13 }
Syntax:
Counter
Definition:
The total number of MIB objects which have been retrieved
successfully by the SNMP protocol entity as the result of
receiving valid SNMP Get-Request and Get-Next PDUs.
Access:
read-only.
IETF SNMP Working Group [Page 88]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
snmpInTotalSetVars { snmp 14 }
Syntax:
Counter
Definition:
The total number of MIB objects which have been altered
successfully by the SNMP protocol entity as the result of
receiving valid SNMP Set-Request PDUs.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetRequests { snmp 15 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Request PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetNexts { snmp 16 }
Syntax:
Counter
IETF SNMP Working Group [Page 89]
RFC 1158 MIB II May 1990
Definition:
The total number of SNMP Get-Next PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInSetRequests { snmp 17 }
Syntax:
Counter
Definition:
The total number of SNMP Set-Request PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpInGetResponses { snmp 18 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Response PDUs which have
been accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
IETF SNMP Working Group [Page 90]
RFC 1158 MIB II May 1990
OBJECT:
-------
snmpInTraps { snmp 19 }
Syntax:
Counter
Definition:
The total number of SNMP Trap PDUs which have been
accepted and processed by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutTooBigs { snmp 20 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "tooBig."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutNoSuchNames { snmp 21 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "noSuchName."
IETF SNMP Working Group [Page 91]
RFC 1158 MIB II May 1990
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutBadValues { snmp 22 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "badValue."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutReadOnlys { snmp 23 }
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "readOnly."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGenErrs { snmp 24 }
IETF SNMP Working Group [Page 92]
RFC 1158 MIB II May 1990
Syntax:
Counter
Definition:
The total number valid SNMP PDUs which were generated by
the SNMP protocol entity and for which the value of the
"ErrorStatus" component is "genErr."
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetRequests { snmp 25 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Request PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetNexts { snmp 26 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Next PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
IETF SNMP Working Group [Page 93]
RFC 1158 MIB II May 1990
Status:
mandatory.
OBJECT:
-------
snmpOutSetRequests { snmp 27 }
Syntax:
Counter
Definition:
The total number of SNMP Set-Request PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutGetResponses { snmp 28 }
Syntax:
Counter
Definition:
The total number of SNMP Get-Response PDUs which have
been generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpOutTraps { snmp 29 }
Syntax:
Counter
IETF SNMP Working Group [Page 94]
RFC 1158 MIB II May 1990
Definition:
The total number of SNMP Trap PDUs which have been
generated by the SNMP protocol entity.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
snmpEnableAuthTraps { snmp 30 }
Syntax:
INTEGER {
enabled(1),
disabled(2)
}
Definition:
Indicates whether the SNMP agent process is configured to
generate authentication-failure traps.
Access:
read-write.
Status:
mandatory.
6. Definitions
RFC1158-MIB
DEFINITIONS ::= BEGIN
IMPORTS
mgmt, OBJECT-TYPE, NetworkAddress, IpAddress,
Counter, Gauge, TimeTicks
FROM RFC1155-SMI;
mib-2 OBJECT IDENTIFIER ::= { mgmt 1 } -- MIB-II
-- (same prefix as MIB-I)
system OBJECT IDENTIFIER ::= { mib-2 1 }
interfaces OBJECT IDENTIFIER ::= { mib-2 2 }
at OBJECT IDENTIFIER ::= { mib-2 3 }
IETF SNMP Working Group [Page 95]
RFC 1158 MIB II May 1990
ip OBJECT IDENTIFIER ::= { mib-2 4 }
icmp OBJECT IDENTIFIER ::= { mib-2 5 }
tcp OBJECT IDENTIFIER ::= { mib-2 6 }
udp OBJECT IDENTIFIER ::= { mib-2 7 }
egp OBJECT IDENTIFIER ::= { mib-2 8 }
-- cmot OBJECT IDENTIFIER ::= { mib-2 9 }
transmission OBJECT IDENTIFIER ::= { mib-2 10 }
snmp OBJECT IDENTIFIER ::= { mib-2 11 }
-- object types
-- the System group
sysDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
::= { system 1 }
sysObjectID OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
::= { system 2 }
sysUpTime OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
::= { system 3 }
sysContact OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
::= { system 4 }
sysName OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
::= { system 5 }
sysLocation OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 96]
RFC 1158 MIB II May 1990
::= { system 6 }
sysServices OBJECT-TYPE
SYNTAX INTEGER (0..127)
ACCESS read-only
STATUS mandatory
::= { system 7 }
-- the Interfaces group
ifNumber OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { interfaces 1 }
-- the Interfaces table
ifTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfEntry
ACCESS read-only
STATUS mandatory
::= { interfaces 2 }
ifEntry OBJECT-TYPE
SYNTAX IfEntry
ACCESS read-only
STATUS mandatory
::= { ifTable 1 }
IfEntry ::= SEQUENCE {
ifIndex
INTEGER,
ifDescr
DisplayString,
ifType
INTEGER,
ifMtu
INTEGER,
ifSpeed
Gauge,
ifPhysAddress
OCTET STRING,
ifAdminStatus
INTEGER,
ifOperStatus
INTEGER,
IETF SNMP Working Group [Page 97]
RFC 1158 MIB II May 1990
ifLastChange
TimeTicks,
ifInOctets
Counter,
ifInUcastPkts
Counter,
ifInNUcastPkts
Counter,
ifInDiscards
Counter,
ifInErrors
Counter,
ifInUnknownProtos
Counter,
ifOutOctets
Counter,
ifOutUcastPkts
Counter,
ifOutNUcastPkts
Counter,
ifOutDiscards
Counter,
ifOutErrors
Counter,
ifOutQLen
Gauge,
ifSpecific
OBJECT IDENTIFIER
}
ifIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ifEntry 1 }
ifDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
::= { ifEntry 2 }
ifType OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the
-- following
regular1822(2),
hdh1822(3),
IETF SNMP Working Group [Page 98]
RFC 1158 MIB II May 1990
ddn-x25(4),
rfc877-x25(5),
ethernet-csmacd(6),
iso88023-csmacd(7),
iso88024-tokenBus(8),
iso88025-tokenRing(9),
iso88026-man(10),
starLan(11),
proteon-10Mbit(12),
proteon-80Mbit(13),
hyperchannel(14),
fddi(15),
lapb(16),
sdlc(17),
t1-carrier(18),
cept(19), -- european
--equivalent of T-1
basicISDN(20),
primaryISDN(21),
-- proprietary
-- serial
propPointToPointSerial(22),
terminalServer-asyncPort(23),
softwareLoopback(24),
eon(25), -- CLNP over IP
ethernet-3Mbit(26),
nsip(27), -- XNS over IP
slip(28) -- generic SLIP
}
ACCESS read-only
STATUS mandatory
::= { ifEntry 3 }
ifMtu OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ifEntry 4 }
ifSpeed OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
::= { ifEntry 5 }
ifPhysAddress OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-only
IETF SNMP Working Group [Page 99]
RFC 1158 MIB II May 1990
STATUS mandatory
::= { ifEntry 6 }
ifAdminStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
ACCESS read-write
STATUS mandatory
::= { ifEntry 7 }
ifOperStatus OBJECT-TYPE
SYNTAX INTEGER {
up(1), -- ready to pass packets
down(2),
testing(3) -- in some test mode
}
ACCESS read-only
STATUS mandatory
::= { ifEntry 8 }
ifLastChange OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
::= { ifEntry 9 }
ifInOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 10 }
ifInUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 11 }
ifInNUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 12 }
ifInDiscards OBJECT-TYPE
IETF SNMP Working Group [Page 100]
RFC 1158 MIB II May 1990
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 13 }
ifInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 14 }
ifInUnknownProtos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 15 }
ifOutOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 16 }
ifOutUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 17 }
ifOutNUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 18 }
ifOutDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 19 }
ifOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ifEntry 20 }
ifOutQLen OBJECT-TYPE
IETF SNMP Working Group [Page 101]
RFC 1158 MIB II May 1990
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
::= { ifEntry 21 }
ifSpecific OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
::= { ifEntry 22 }
nullSpecific OBJECT IDENTIFIER ::= { 0 0 }
-- the Address Translation group (deprecated)
atTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtEntry
ACCESS read-write
STATUS deprecated
::= { at 1 }
atEntry OBJECT-TYPE
SYNTAX AtEntry
ACCESS read-write
STATUS deprecated
::= { atTable 1 }
AtEntry ::= SEQUENCE {
atIfIndex
INTEGER,
atPhysAddress
OCTET STRING,
atNetAddress
NetworkAddress
}
atIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS deprecated
::= { atEntry 1 }
atPhysAddress OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-write
STATUS deprecated
::= { atEntry 2 }
IETF SNMP Working Group [Page 102]
RFC 1158 MIB II May 1990
atNetAddress OBJECT-TYPE
SYNTAX NetworkAddress
ACCESS read-write
STATUS deprecated
::= { atEntry 3 }
-- the IP group
ipForwarding OBJECT-TYPE
SYNTAX INTEGER {
gateway(1), -- entity forwards
-- datagrams
host(2) -- entity does NOT
-- forward datagrams
}
ACCESS read-write
STATUS mandatory
::= { ip 1 }
ipDefaultTTL OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ip 2 }
ipInReceives OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 3 }
ipInHdrErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 4 }
ipInAddrErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 5 }
ipForwDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 103]
RFC 1158 MIB II May 1990
::= { ip 6 }
ipInUnknownProtos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 7 }
ipInDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 8 }
ipInDelivers OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 9 }
ipOutRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 10 }
ipOutDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 11 }
ipOutNoRoutes OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 12 }
ipReasmTimeout OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ip 13 }
ipReasmReqds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 104]
RFC 1158 MIB II May 1990
::= { ip 14 }
ipReasmOKs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 15 }
ipReasmFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 16 }
ipFragOKs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 17 }
ipFragFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 18 }
ipFragCreates OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { ip 19 }
-- the IP Interface table
ipAddrTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpAddrEntry
ACCESS read-only
STATUS mandatory
::= { ip 20 }
ipAddrEntry OBJECT-TYPE
SYNTAX IpAddrEntry
ACCESS read-only
STATUS mandatory
::= { ipAddrTable 1 }
IpAddrEntry ::= SEQUENCE {
ipAdEntAddr
IETF SNMP Working Group [Page 105]
RFC 1158 MIB II May 1990
IpAddress,
ipAdEntIfIndex
INTEGER,
ipAdEntNetMask
IpAddress,
ipAdEntBcastAddr
INTEGER,
ipAdEntReasmMaxSize
INTEGER (0..65535)
}
ipAdEntAddr OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
::= { ipAddrEntry 1 }
ipAdEntIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ipAddrEntry 2 }
ipAdEntNetMask OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
::= { ipAddrEntry 3 }
ipAdEntBcastAddr OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ipAddrEntry 4 }
ipAdEntReasmMaxSiz OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
::= { ipAddrEntry 5 }
-- the IP Routing table
ipRoutingTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpRouteEntry
ACCESS read-write
STATUS mandatory
::= { ip 21 }
IETF SNMP Working Group [Page 106]
RFC 1158 MIB II May 1990
ipRouteEntry OBJECT-TYPE
SYNTAX IpRouteEntry
ACCESS read-write
STATUS mandatory
::= { ipRoutingTable 1 }
IpRouteEntry ::= SEQUENCE {
ipRouteDest
IpAddress,
ipRouteIfIndex
INTEGER,
ipRouteMetric1
INTEGER,
ipRouteMetric2
INTEGER,
ipRouteMetric3
INTEGER,
ipRouteMetric4
INTEGER,
ipRouteNextHop
IpAddress,
ipRouteType
INTEGER,
ipRouteProto
INTEGER,
ipRouteAge
INTEGER,
ipRouteMask
IpAddress
}
ipRouteDest OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 1 }
ipRouteIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 2 }
ipRouteMetric1 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 3 }
IETF SNMP Working Group [Page 107]
RFC 1158 MIB II May 1990
ipRouteMetric2 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 4 }
ipRouteMetric3 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 5 }
ipRouteMetric4 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 6 }
ipRouteNextHop OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 7 }
ipRouteType OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the following
invalid(2), -- an invalidated route
-- route to directly
direct(3), -- connected
-- (sub-)network
-- route to a non-local
remote(4) -- host/network/
-- sub-network
}
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 8 }
ipRouteProto OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the following
-- non-protocol
-- information
IETF SNMP Working Group [Page 108]
RFC 1158 MIB II May 1990
-- e.g., manually
local(2), -- configured entries
-- set via a network
netmgmt(3), -- management protocol
-- obtained via ICMP,
icmp(4), -- e.g., Redirect
-- the following are
-- gateway routing
-- protocols
egp(5),
ggp(6),
hello(7),
rip(8),
is-is(9),
es-is(10),
ciscoIgrp(11),
bbnSpfIgp(12),
ospf(13)
bgp(14)
}
ACCESS read-only
STATUS mandatory
::= { ipRouteEntry 9 }
ipRouteAge OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 10 }
ipRouteMask OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 11 }
-- the IP Address Translation tables
ipNetToMediaTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpNetToMediaEntry
ACCESS read-write
STATUS mandatory
::= { ip 22 }
ipNetToMediaEntry OBJECT-TYPE
IETF SNMP Working Group [Page 109]
RFC 1158 MIB II May 1990
SYNTAX IpNetToMediaEntry
ACCESS read-write
STATUS mandatory
::= { ipNetToMediaTable 1 }
IpNetToMediaEntry ::= SEQUENCE {
ipNetToMediaIfIndex
INTEGER,
ipNetToMediaPhysAddress
OCTET STRING,
ipNetToMediaNetAddress
IpAddress,
ipNetoToMediaType
INTEGER
}
ipNetToMediaIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipNetToMediaEntry 1 }
ipNetToMediaPhysAddress OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-write
STATUS mandatory
::= { ipNetToMediaEntry 2 }
ipNetToMediaNetAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
::= { ipNetToMediaEntry 3 }
ipNetToMediaType OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the following
invalid(2), -- an invalidated mapping
dynamic(3), -- connected (sub-)network
static(4)
}
ACCESS read-write
STATUS mandatory
::= { ipNetToMediaEntry 4 }
IETF SNMP Working Group [Page 110]
RFC 1158 MIB II May 1990
-- the ICMP group
icmpInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 1 }
icmpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 2 }
icmpInDestUnreachs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 3 }
icmpInTimeExcds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 4 }
icmpInParmProbs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 5 }
icmpInSrcQuenchs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 6 }
icmpInRedirects OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 7 }
icmpInEchos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 111]
RFC 1158 MIB II May 1990
::= { icmp 8 }
icmpInEchoReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 9 }
icmpInTimestamps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 10 }
icmpInTimestampReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 11 }
icmpInAddrMasks OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 12 }
icmpInAddrMaskReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 13 }
icmpOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 14 }
icmpOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 15 }
icmpOutDestUnreachs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 112]
RFC 1158 MIB II May 1990
::= { icmp 16 }
icmpOutTimeExcds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 17 }
icmpOutParmProbs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 18 }
icmpOutSrcQuenchs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 19 }
icmpOutRedirects OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 20 }
icmpOutEchos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 21 }
icmpOutEchoReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 22 }
icmpOutTimestamps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 23 }
icmpOutTimestampReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 113]
RFC 1158 MIB II May 1990
::= { icmp 24 }
icmpOutAddrMasks OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 25 }
icmpOutAddrMaskReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { icmp 26 }
-- the TCP group
tcpRtoAlgorithm OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the following
constant(2), -- a constant rto
rsre(3), -- MIL-STD-1778,
-- Appendix B
vanj(4) -- Van Jacobson's
-- algorithm
}
ACCESS read-only
STATUS mandatory
::= { tcp 1 }
tcpRtoMin OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { tcp 2 }
tcpRtoMax OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { tcp 3 }
tcpMaxConn OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { tcp 4 }
IETF SNMP Working Group [Page 114]
RFC 1158 MIB II May 1990
tcpActiveOpens OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 5 }
tcpPassiveOpens OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 6 }
tcpAttemptFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 7 }
tcpEstabResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 8 }
tcpCurrEstab OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
::= { tcp 9 }
tcpInSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 10 }
tcpOutSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 11 }
tcpRetransSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 12 }
IETF SNMP Working Group [Page 115]
RFC 1158 MIB II May 1990
-- the TCP connections table
tcpConnTable OBJECT-TYPE
SYNTAX SEQUENCE OF TcpConnEntry
ACCESS read-only
STATUS mandatory
::= { tcp 13 }
tcpConnEntry OBJECT-TYPE
SYNTAX TcpConnEntry
ACCESS read-only
STATUS mandatory
::= { tcpConnTable 1 }
TcpConnEntry ::= SEQUENCE {
tcpConnState
INTEGER,
tcpConnLocalAddress
IpAddress,
tcpConnLocalPort
INTEGER (0..65535),
tcpConnRemAddress
IpAddress,
tcpConnRemPort
INTEGER (0..65535)
}
tcpConnState OBJECT-TYPE
SYNTAX INTEGER {
closed(1),
listen(2),
synSent(3),
synReceived(4),
established(5),
finWait1(6),
finWait2(7),
closeWait(8),
lastAck(9),
closing(10),
timeWait(11)
}
ACCESS read-only
STATUS mandatory
::= { tcpConnEntry 1 }
tcpConnLocalAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
IETF SNMP Working Group [Page 116]
RFC 1158 MIB II May 1990
STATUS mandatory
::= { tcpConnEntry 2 }
tcpConnLocalPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
::= { tcpConnEntry 3 }
tcpConnRemAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
::= { tcpConnEntry 4 }
tcpConnRemPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
::= { tcpConnEntry 5 }
-- additional TCP variables
tcpInErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 14 }
tcpOutRsts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { tcp 15 }
-- the UDP group
udpInDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { udp 1 }
udpNoPorts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
IETF SNMP Working Group [Page 117]
RFC 1158 MIB II May 1990
::= { udp 2 }
udpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { udp 3 }
udpOutDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { udp 4 }
-- the UDP listener table
udpTable OBJECT-TYPE
SYNTAX SEQUENCE OF UdpEntry
ACCESS read-only
STATUS mandatory
::= { udp 5 }
udpEntry OBJECT-TYPE
SYNTAX UdpEntry
ACCESS read-only
STATUS mandatory
::= { udpTable 1 }
UdpEntry ::= SEQUENCE {
udpLocalAddress
IpAddress,
udpLocalPort
INTEGER (0..65535)
}
udpLocalAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
::= { udpEntry 1 }
udpLocalPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
::= { udpEntry 2 }
IETF SNMP Working Group [Page 118]
RFC 1158 MIB II May 1990
-- the EGP group
egpInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egp 1 }
egpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egp 2 }
egpOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egp 3 }
egpOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egp 4 }
-- the EGP Neighbor table
egpNeighTable OBJECT-TYPE
SYNTAX SEQUENCE OF EgpNeighEntry
ACCESS read-only
STATUS mandatory
::= { egp 5 }
egpNeighEntry OBJECT-TYPE
SYNTAX EgpNeighEntry
ACCESS read-only
STATUS mandatory
::= { egpNeighTable 1 }
EgpNeighEntry ::= SEQUENCE {
egpNeighState
INTEGER,
egpNeighAddr
IpAddress,
egpNeighAs
INTEGER,
egpNeighInMsgs
IETF SNMP Working Group [Page 119]
RFC 1158 MIB II May 1990
Counter,
egpNeighInErrs
Counter,
egpNeighOutMsgs
Counter,
egpNeighOutErrs
Counter,
egpNeighInErrMsgs
Counter,
egpNeighOutErrMsgs
Counter,
egpNeighStateUps
Counter,
egpNeighStateDowns
Counter,
egpNeighIntervalHello
INTEGER,
egpNeighIntervalPoll
INTEGER,
egpNeighMode
INTEGER,
egpNeighEventTrigger
INTEGER
}
egpNeighState OBJECT-TYPE
SYNTAX INTEGER {
idle(1),
acquisition(2),
down(3),
up(4),
cease(5)
}
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 1 }
egpNeighAddr OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 2 }
egpNeighAs OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 3 }
IETF SNMP Working Group [Page 120]
RFC 1158 MIB II May 1990
egpNeighInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 4 }
egpNeighInErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 5 }
egpNeighOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 6 }
egpNeighOutErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 7 }
egpNeighInErrMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 8 }
egpNeighOutErrMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 9 }
egpNeighStateUps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 10 }
egpNeighStateDowns OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 11 }
IETF SNMP Working Group [Page 121]
RFC 1158 MIB II May 1990
egpNeighIntervalHello OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 12 }
egpNeighIntervalPoll OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 13 }
egpNeighMode OBJECT-TYPE
SYNTAX INTEGER {
active(1),
passive(2)
}
ACCESS read-only
STATUS mandatory
::= { egpNeighEntry 14 }
egpNeighEventTrigger OBJECT-TYPE
SYNTAX INTEGER {
start(1),
stop(2)
}
ACCESS read-write
STATUS mandatory
::= { egpNeighEntry 15 }
-- additional EGP variables
egpAs OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { egp 6 }
-- the Transmission group (empty at present)
-- the SNMP group
snmpInPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 1 }
IETF SNMP Working Group [Page 122]
RFC 1158 MIB II May 1990
snmpOutPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 2 }
snmpInBadVersions OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 3 }
snmpInBadCommunityNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 4 }
snmpInBadCommunityUses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 5 }
snmpInASNParseErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 6 }
snmpInBadTypes OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 7 }
snmpInTooBigs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 8 }
snmpInNoSuchNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 9 }
IETF SNMP Working Group [Page 123]
RFC 1158 MIB II May 1990
snmpInBadValues OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 10 }
snmpInReadOnlys OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 11 }
snmpInGenErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 12 }
snmpInTotalReqVars OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 13 }
snmpInTotalSetVars OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 14 }
snmpInGetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 15 }
snmpInGetNexts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 16 }
snmpInSetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 17 }
IETF SNMP Working Group [Page 124]
RFC 1158 MIB II May 1990
snmpInGetResponses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 18 }
snmpInTraps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 19 }
snmpOutTooBigs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 20 }
snmpOutNoSuchNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 21 }
snmpOutBadValues OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 22 }
snmpOutReadOnlys OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 23 }
snmpOutGenErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 24 }
snmpOutGetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 25 }
IETF SNMP Working Group [Page 125]
RFC 1158 MIB II May 1990
snmpOutGetNexts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 26 }
snmpOutSetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 27 }
snmpOutGetResponses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 28 }
snmpOutTraps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
::= { snmp 29 }
snmpEnableAuthTraps OBJECT-TYPE
SYNTAX INTEGER {
enabled(1),
disabled(2)
}
ACCESS read-write
STATUS mandatory
::= { snmp 30 }
END
7. Identification of OBJECT instances for use with the SNMP
The names for all object types in the MIB are defined explicitly
either in the Internet-standard MIB or in other documents which
conform to the naming conventions of the SMI. The SMI requires that
conformant management protocols define mechanisms for identifying
individual instances of those object types for a particular network
element.
Each instance of any object type defined in the MIB is identified in
SNMP operations by a unique name called its "variable name." In
general, the name of an SNMP variable is an OBJECT IDENTIFIER of the
form x.y, where x is the name of a non-aggregate object type defined
IETF SNMP Working Group [Page 126]
RFC 1158 MIB II May 1990
in the MIB and y is an OBJECT IDENTIFIER fragment that, in a way
specific to the named object type, identifies the desired instance.
This naming strategy admits the fullest exploitation of the semantics
of the powerful SNMP get-next operator, because it assigns names for
related variables so as to be contiguous in the lexicographical
ordering of all variable names known in the MIB.
The type-specific naming of object instances is defined below for a
number of classes of object types. Instances of an object type to
which none of the following naming conventions are applicable are
named by OBJECT IDENTIFIERs of the form x.0, where x is the name of
said object type in the MIB definition.
For example, suppose one wanted to identify an instance of the
variable sysDescr. The object class for sysDescr is:
iso org dod internet mgmt mib system sysDescr
1 3 6 1 2 1 1 1
Hence, the object type, x, would be 1.3.6.1.2.1.1.1 to which is
appended an instance sub-identifier of 0. That is, 1.3.6.1.2.1.1.1.0
identifies the one and only instance of sysDescr.
7.1. ifTable Object Type Names
The name of a subnetwork interface, s, is the OBJECT IDENTIFIER value
of the form i, where i has the value of that instance of the ifIndex
object type associated with s. For each object type, t, for which
the defined name, n, has a prefix of ifEntry, an instance, i, of t is
named by an OBJECT IDENTIFIER of the form n.s, where s is the name of
the subnetwork interface about which i represents information.
For example, suppose one wanted to identify the instance of the
variable ifType associated with interface 2. Accordingly, ifType.2
would identify the desired instance.
7.2. atTable Object Type Names
The name of an address translation entry, x, is an OBJECT IDENTIFIER
of the form s.1.a.b.c.d, such that s is the value of that instance of
the atIfIndex object type associated with x, the subidentifer "1"
signifies the translation of an IP protocol address, and a.b.c.d is
the IP address value (in the familiar "dot" notation) of that
instance of the atNetAddress object type associated with x.
For each object type, t, for which the defined name, n, has a prefix
of atEntry, an instance, i, of t is named by an OBJECT IDENTIFIER of
IETF SNMP Working Group [Page 127]
RFC 1158 MIB II May 1990
the form n.y, where y is the name of the address translation entry
about which i represents information.
For example, suppose one wanted to find the physical address of an
entry in the address translation table (ARP cache) associated with an
IP address of 89.1.1.42 and interface 3. Accordingly,
atPhysAddress.3.1.89.1.1.42 would identify the desired instance.
7.3. ipAddrTable Object Type Names
The name of an IP-addressable network element, x, is the OBJECT
IDENTIFIER of the form a.b.c.d such that a.b.c.d is the value (in the
familiar "dot" notation) of that instance of the ipAdEntAddr object
type associated with x.
For each object type, t, for which the defined name, n, has a prefix
of ipAddrEntry, an instance, i, of t is named by an OBJECT IDENTIFIER
of the form n.y, where y is the name of the IP- addressable network
element about which i represents information.
For example, suppose one wanted to find the network mask of an entry
in the IP interface table associated with an IP address of 89.1.1.42.
Accordingly, ipAdEntNetMask.89.1.1.42 would identify the desired
instance.
At the option of the agent, multiple entries for the same IP address
may be visible. To realize this, the agent, while required to return
a single entry for an IP address, x, of the form n.y, may also return
information about other entries for the same IP address using the
form n.y.z, where z is a implementation-dependendent small, non-
negative integer. It is strongly recommended that the value of z
correspond to the value of ipAddrIfIndex for that entry.
7.4. ipRoutingTable Object Type Names
The name of an IP route, x, is the OBJECT IDENTIFIER of the form
a.b.c.d such that a.b.c.d is the value (in the familiar "dot"
notation) of that instance of the ipRouteDest object type associated
with x.
For each object type, t, for which the defined name, n, has a prefix
of ipRoutingEntry, an instance, i, of t is named by an OBJECT
IDENTIFIER of the form n.y, where y is the name of the IP route about
which i represents information.
For example, suppose one wanted to find the next hop of an entry in
the IP routing table associated with the destination of 89.1.1.42.
Accordingly, ipRouteNextHop.89.1.1.42 would identify the desired
IETF SNMP Working Group [Page 128]
RFC 1158 MIB II May 1990
instance.
At the option of the agent, multiple routes to the same destination
may be visible. To realize this, the agent, while required to return
a single entry for an IP route, x, of the form n.y, may also return
information about other routes to the same destination using the form
n.y.z, where z is a implementation-dependendent small, non-negative
integer.
7.5. ipNetToMediaTable Object Type Names
The name of a cached IP address, x, is an OBJECT IDENTIFIER of the
form s.a.b.c.d, such that s is the value of that instance of the
ipNetToMediaIfIndex object type associated with the entry and a.b.c.d
is the value (in the familiar "dot" notation) of the
ipNetToMediaNetAddress object type associated with x.
For each object type, t, for which the defined name, n, has a prefix
of ipNetToMediaEntry, an instance, i, of t is named by an OBJECT
IDENTIFIER of the form n.y, where y is the name of the cached IP
address about which i represents information.
For example, suppose one wanted to find the media address of an entry
in the address translation table associated with a IP address of
192.52.180.1 and interface 3. Accordingly,
ipNetToMediaPhysAddress.3.192.52.180.1 would identify the desired
instance.
7.6. tcpConnTable Object Type Names
The name of a TCP connection, x, is the OBJECT IDENTIFIER of the form
a.b.c.d.e.f.g.h.i.j such that a.b.c.d is the value (in the familiar
"dot" notation) of that instance of the tcpConnLocalAddress object
type associated with x and such that f.g.h.i is the value (in the
familiar "dot" notation) of that instance of the tcpConnRemoteAddress
object type associated with x and such that e is the value of that
instance of the tcpConnLocalPort object type associated with x and
such that j is the value of that instance of the tcpConnRemotePort
object type associated with x.
For each object type, t, for which the defined name, n, has a prefix
of tcpConnEntry, an instance, i, of t is named by an OBJECT
IDENTIFIER of the form n.y, where y is the name of the TCP connection
about which i represents information.
For example, suppose one wanted to find the state of a TCP connection
between the local address of 89.1.1.42 on TCP port 21 and the remote
address of 10.0.0.51 on TCP port 2059. Accordingly,
IETF SNMP Working Group [Page 129]
RFC 1158 MIB II May 1990
tcpConnState.89.1.1.42.21.10.0.0.51.2059 would identify the desired
instance.
7.7. udpTable Object Type Names
The name of a UDP listener, x, is the OBJECT IDENTIFIER of the form
a.b.c.d.e. such that a.b.c.d is the value (in the familiar "dot"
notation) of that instance of the udpLocalAddress object type
associated with x and such that e is the value of that instance of
the udpLocalPort object type associated with x.
For each object type, t, for which the defined name, n, has a prefix
of udpEntry, an instance, i, of t is named by an OBJECT IDENTIFIER of
the form n.y, where y is the name of the UDP listener about which i
represents information.
For example, suppose one wanted to determine if a UDP listener was
present at the local address of 89.1.1.42 on UDP port 21.
Accordingly, a successful retrieval of either
udpLocalAddress.89.1.1.42.21 or udpLocalPort.89.1.1.42.21 would
indicate this.
7.8. egpNeighTable Object Type Names
The name of an EGP neighbor, x, is the OBJECT IDENTIFIER of the form
a.b.c.d such that a.b.c.d is the value (in the familiar "dot"
notation) of that instance of the egpNeighAddr object type associated
with x.
For each object type, t, for which the defined name, n, has a prefix
of egpNeighEntry, an instance, i, of t is named by an OBJECT
IDENTIFIER of the form n.y, where y is the name of the EGP neighbor
about which i represents information.
For example, suppose one wanted to find the neighbor state for the IP
address of 89.1.1.42. Accordingly, egpNeighState.89.1.1.42 would
identify the desired instance.
8. Acknowledgements
This document was produced by the SNMP Working Group:
Karl Auerbach, Epilogue Technology
David Bridgham, Epilogue Technology
Brian Brown, Synoptics
John Burress, Wellfleet
Jeffrey D. Case, University of Tennessee at Knoxville
James R. Davin, MIT-LCS
IETF SNMP Working Group [Page 130]
RFC 1158 MIB II May 1990
Mark S. Fedor, PSI, Inc.
Stan Froyd, ACC
Satish Joshi, Synoptics
Ken Key, University of Tennessee at Knoxville
Gary Malkin, Proteon
Randy Mayhew, University of Tennessee at Knoxville
Keith McCloghrie, Hughes LAN Systems
Marshall T. Rose, PSI, Inc. (chair)
Greg Satz, cisco
Martin Lee Schoffstall, PSI, Inc.
Bob Stewart, Xyplex
Geoff Thompson, Synoptics
Bill Versteeg, Network Research Corporation
Wengyik Yeong, PSI, Inc.
In addition, the comments of the following individuals are also
acknolwedged:
Craig A. Finseth, Minnesota Supercomputer Center, Inc.
Jeffrey C. Honig, Cornell University Theory Center
Philip R. Karn, Bellcore
David Waitzman, BBN
9. References
[1] Cerf, V., "IAB Recommendations for the Development of Internet
Network Management Standards", RFC 1052, IAB, April 1988.
[2] Rose, M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", RFC 1065,
TWG, August 1988.
[3] McCloghrie K., and M. Rose,"Management Information Base for
Network Management of TCP/IP-based internets", RFC 1066, TWG,
August 1988.
[4] Cerf, V., "Report of the Second Ad Hoc Network Management Review
Group", RFC 1109, IAB, August 1989.
[5] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "A Simple
Network Management Protocol (SNMP)", RFC 1098, University of
Tennessee at Knoxville, NYSERNet, Inc., Rensselaer Polytechnic
Institute, MIT Laboratory for Computer Science, April 1989.
[6] Warrier, U., and L. Besaw, "Common Management Information
Services and Protocol over TCP/IP (CMOT)", RFC 1095, Unisys
Corporation, Hewlett-Packard, April 1989.
IETF SNMP Working Group [Page 131]
RFC 1158 MIB II May 1990
[7] Postel, J., "Telnet Protocol Specification", RFC 854,
USC/Information Sciences Institute, May 1983.
[8] Satz, G., "Experimental MIB Objects for the CLNP", Internet
Working Group Request for Comments draft. Network Information
Center, SRI International, Menlo Park, California, (in
preparation).
[9] Information processing systems - Open Systems Interconnection,
"Specification of Abstract Syntax Notation One (ASN.1)",
International Organization for Standardization, International
Standard 8824, December 1987.
[10] Information processing systems - Open Systems Interconnection,
"Specification of Basic Encoding Rules for Abstract Notation One
(ASN.1)", International Organization for Standardization.
International Standard 8825, December 1987.
[11] Jacobson, V., "Congestion Avoidance and Control", SIGCOMM 1988,
Stanford, California.
[12] Hagens, R., Hall, N., and M. Rose, "Use of the Internet as a
subnetwork for experimentation with the OSI network layer",
February, 1989.
[13] Rose, M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based Internets", RFC 1155,
Performance Systems International and Hughes LAN Systems, May
1990.
[14] Case, J., Fedor, M., Schoffstall, M., and J. Davin, The Simple
Network Management Protocol", RFC 1157, University of Tennessee
at Knoxville, Performance Systems International, Performance
Systems International, and the MIT Laboratory for Computer
Science, May 1990.
IETF SNMP Working Group [Page 132]
RFC 1158 MIB II May 1990
10. Security Considerations
Security issues are not discussed in this memo.
11. Author's Address:
Marshall T. Rose
PSI, Inc.
PSI California Office
P.O. Box 391776
Mountain View, CA 94039
Phone: (415) 961-3380
Email: mrose@PSI.COM
IETF SNMP Working Group [Page 133]