RFC 1156
Network Working Group K. McCloghrie
Request For Comments: 1156 Hughes LAN Systems
Obsoletes: RFC 1066 M. Rose
Performance Systems International
May 1990
Management Information Base for Network Management
of TCP/IP-based internets
Table of Contents
1. Status of this Memo ................................... 1
2. IAB Policy Statement .................................. 2
3. Introduction .......................................... 2
4. Objects ............................................... 6
4.1 Object Groups ........................................ 6
4.2 Format of Definitions ................................ 7
5. Object Definitions .................................... 8
5.1 The System Group ..................................... 9
5.2 The Interfaces Group ................................. 11
5.2.1 The Interfaces Table ............................... 11
5.3 The Address Translation Group ........................ 23
5.4 The IP Group ......................................... 26
5.4.1 The IP Address Table ............................... 34
5.4.2 The IP Routing Table ............................... 36
5.5 The ICMP Group ....................................... 43
5.6 The TCP Group ........................................ 53
5.7 The UDP Group ........................................ 62
5.8 The EGP Group ........................................ 64
5.8.1 The EGP Neighbor Table ............................. 65
6. Definitions ........................................... 68
7. Acknowledgements ...................................... 89
8. References ............................................ 90
9. Security Considerations................................ 91
10. Authors' Addresses.................................... 91
1. Status of this Memo
This RFC is a re-release of RFC 1066, with a changed "Status of this
Memo", "IAB Policy Statement", and "Introduction" sections plus a few
minor typographical corrections. The technical content of the
document is unchanged from RFC 1066.
This memo provides the initial version of the Management Information
Base (MIB) for use with network management protocols in TCP/IP-based
internets in the short-term. In particular, together with its
companion memos which describe the structure of management
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information along with the initial network management protocol, these
documents provide a simple, workable architecture and system for
managing TCP/IP-based internets and in particular the Internet.
This memo specifies a Standard Protocol for the Internet community.
TCP/IP implementations in the Internet which are network manageable
are expected to adopt and implement this specification.
The Internet Activities Board recommends that all IP and TCP
implementations be network manageable. This implies implementation
of the Internet MIB (RFC 1156) and at least one of the two
recommended management protocols SNMP (RFC 1157) or CMOT (RFC 1095).
It should be noted that, at this time, SNMP is a full Internet
standard and CMOT is a draft standard. See also the Host and Gateway
Requirements RFCs for more specific information on the applicability
of this standard.
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.
2. IAB Policy Statement
This MIB specification is the first edition of an evolving document
defining variables needed for monitoring and control of various
components of the Internet. Not all groups of defined variables are
mandatory for all Internet components.
For example, the EGP group is mandatory for gateways using EGP but
not for hosts which should not be running EGP. Similarly, the TCP
group is mandatory for hosts running TCP but not for gateways which
aren't running it. What IS mandatory, however, is that all variables
of a group be supported if any element of the group is supported.
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. The responsible working
group(s) will continue to refine this specification.
3. Introduction
As reported in RFC 1052, IAB Recommendations for the Development of
Internet Network Management Standards [1], the Internet Activities
Board has directed the Internet Engineering Task Force (IETF) to
create two new working groups in the area of network management. One
group was charged with the further specification and definition of
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elements to be included in the Management Information Base. The
other was charged with defining the modifications to the Simple
Network Management Protocol (SNMP) to accommodate the short-term
needs of the network vendor and operator communities. In the long-
term, the use of the OSI network management framework was to be
examined using the ISO CMIS/CMIP [2,3] framework as a basis. Two
documents were produced to define the management information: RFC
1065, which defined the Structure of Management Information (SMI)
[4], and RFC 1066, which defined the Management Information Base
(MIB) [5]. 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 [6], 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.
The IAB has designated the SNMP, SMI, and the initial Internet MIB to
be full "Standard Protocols" with "Recommended" status. By this
action, the IAB recommends that all IP and TCP implementations be
network manageable and that the implementations that are network
manageable are expected to adopt and implement the SMI, MIB, and
SNMP.
As such, the current network management framework for TCP/IP- based
internets consists of: Structure and Identification of Management
Information for TCP/IP-based Internets, which describes how managed
objects contained in the MIB are defined as set forth in RFC 1155
[7]; Management Information Base for Network Management of TCP/IP-
based Internets, which describes the managed objects contained in the
MIB as set forth in this memo; and, the Simple Network Management
Protocol, which defines the protocol used to manage these objects, as
set forth in RFC 1157 [8].
The IAB also urged the working groups to be "extremely sensitive to
the need to keep SNMP simple," and recommends that the MIB working
group take as its starting inputs the MIB definitions found in the
High-Level Entity Management Systems (HEMS) RFC 1024 [9], the initial
SNMP specification [10], and the CMIS/CMIP memos [11,12].
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Thus, the list of managed objects defined here, has been derived by
taking only those elements which are considered essential. Since
such elements are essential, there is no need to allow the
implementation of individual objects, to be optional. Rather, all
compliant implementations will contain all applicable (see below)
objects defined in this memo.
This approach of taking only the essential objects is NOT
restrictive, since the SMI defined in the companion memo provides
three extensibility mechanisms: one, the addition of new standard
objects through the definitions of new versions of the MIB; two, the
addition of widely-available but non-standard objects through the
multilateral subtree; and three, the addition of private objects
through the enterprises subtree. Such additional objects can not only
be used for vendor-specific elements, but also for experimentation as
required to further the knowledge of which other objects are
essential.
The primary criterion for being considered essential was for an
object to be contained in all of the above referenced MIB
definitions. A few other objects have been included, but only if the
MIB working group believed they are truly essential. The detailed
list of criteria against which potential inclusions in this (initial)
MIB were considered, was:
1) An object needed to be essential for either fault or
configuration management.
2) Only weak control objects were permitted (by weak, it
is meant that tampering with them can do only limited
damage). This criterion reflects the fact that the
current management protocols are not sufficiently secure
to do more powerful control operations.
3) Evidence of current use and utility was required.
4) An attempt was made to limit the number of objects to
about 100 to make it easier for vendors to fully
instrument their software.
5) To avoid redundant variables, it was required that no
object be included that can be derived from others in the
MIB.
6) Implementation specific objects (e.g., for BSD UNIX)
were excluded.
7) It was agreed to avoid heavily instrumenting critical
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sections of code. The general guideline was one counter
per critical section per layer.
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4. Objects
Managed objects are accessed via a virtual information store, termed
the Management Information Base or MIB. Objects in the MIB are
defined using Abstract Syntax Notation One (ASN.1) [13].
The mechanisms used for describing these objects are specified in the
companion memo. 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 of ASN.1 [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
- IP
- ICMP
- TCP
- UDP
- EGP
There are two reasons for defining these groups: one, to provide a
means of assigning object identifiers; two, 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
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in that group. For example, an implementation must implement the EGP
group if and only if it implements the EGP protocol.
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:
One of read-only, read-write, write-only, or
not-accessible.
Status:
One of mandatory, optional, or obsolete.
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5. Object Definitions
RFC1156-MIB
DEFINITIONS ::= BEGIN
IMPORTS
mgmt, OBJECT-TYPE, NetworkAddress, IpAddress,
Counter, Gauge, TimeTicks
FROM RFC1155-SMI;
mib OBJECT IDENTIFIER ::= { mgmt 1 }
system OBJECT IDENTIFIER ::= { mib 1 }
interfaces OBJECT IDENTIFIER ::= { mib 2 }
at OBJECT IDENTIFIER ::= { mib 3 }
ip OBJECT IDENTIFIER ::= { mib 4 }
icmp OBJECT IDENTIFIER ::= { mib 5 }
tcp OBJECT IDENTIFIER ::= { mib 6 }
udp OBJECT IDENTIFIER ::= { mib 7 }
egp OBJECT IDENTIFIER ::= { mib 8 }
END
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5.1. The System Group
Implementation of the System group is mandatory for all
systems.
OBJECT:
-------
sysDescr { system 1 }
Syntax:
OCTET STRING
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.
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 1.3.6.1.4.1.42, it could assign the identifier
1.3.6.1.4.1.42.1.1 to its "Fred Router".
Access:
read-only.
Status:
mandatory.
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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.
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5.2. The Interfaces Group
Implementation of the Interfaces group is mandatory for all
systems.
OBJECT:
-------
ifNumber { interfaces 1 }
Syntax:
INTEGER
Definition:
The number of network interfaces (regardless of their
current state) on which this system can send/receive IP
datagrams.
Access:
read-only.
Status:
mandatory.
RFC 1156 MIB May 1990
ggp(6),
hello(7),
rip(8),
is-is(9),
es-is(10),
ciscoIgrp(11),
bbnSpfIgp(12),
oigp(13)
}
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.
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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.
Note that individual counters for ICMP message (sub-)codes have been
omitted from this (version of the) MIB for simplicity.
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.
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 errors (bad ICMP checksums, bad
length, etc.).
Access:
read-only.
Status:
mandatory.
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OBJECT:
-------
icmpInDestUnreachs { icmp 3 }
Syntax:
Counter
Definition:
The number of ICMP Destination Unreachable messages
received.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
icmpInTimeExcds { icmp 4 }
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.
RFC 1156 MIB May 1990
Definition:
The local IP address for this TCP connection.
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.
OBJECT:
-------
tcpConnRemAddress { tcpConnEntry 4 }
Syntax:
IpAddress
Definition:
The remote IP address for this TCP connection.
Access:
read-only.
Status:
mandatory.
OBJECT:
-------
tcpConnRemPort { tcpConnEntry 5 }
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Syntax:
INTEGER (0..65535)
Definition:
The remote port number for this TCP connection.
Access:
read-only.
Status:
mandatory.
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5.7. The UDP Group
Implementation of the UDP group is mandatory for all systems
which implement the UDP protocol.
OBJECT:
-------
udpInDatagrams { udp 1 }
Syntax:
Counter
Definition:
The total number of UDP datagrams delivered to UDP
users.
Access:
read-only.
Status:
mandatory.
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
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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.
Access:
read-only.
Status:
mandatory.
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5.8. The EGP Group
Implementation of the EGP group is mandatory for all systems
which implement the EGP protocol.
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
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Definition:
The total number of locally generated EGP messages.
Access:
read-only.
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.
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OBJECT:
-------
egpNeighEntry { egpNeighTable 1 }
Syntax:
EgpNeighEntry ::= SEQUENCE {
egpNeighState
INTEGER,
egpNeighAddr
IpAddress
}
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:
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.
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Status:
mandatory.
OBJECT:
-------
egpNeighAddr { egpNeighEntry 2 }
Syntax:
IpAddress
Definition:
The IP address of this entry's EGP neighbor.
Access:
read-only.
Status:
mandatory.
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6. Definitions
RFC1156-MIB
DEFINITIONS ::= BEGIN
IMPORTS
mgmt, OBJECT-TYPE, NetworkAddress, IpAddress,
Counter, Gauge, TimeTicks
FROM RFC1155-SMI;
mib OBJECT IDENTIFIER ::= { mgmt 1 }
system OBJECT IDENTIFIER ::= { mib 1 }
interfaces OBJECT IDENTIFIER ::= { mib 2 }
at OBJECT IDENTIFIER ::= { mib 3 }
ip OBJECT IDENTIFIER ::= { mib 4 }
icmp OBJECT IDENTIFIER ::= { mib 5 }
tcp OBJECT IDENTIFIER ::= { mib 6 }
udp OBJECT IDENTIFIER ::= { mib 7 }
egp OBJECT IDENTIFIER ::= { mib 8 }
-- object types
-- the System group
sysDescr OBJECT-TYPE
SYNTAX OCTET STRING
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 }
-- the Interfaces group
ifNumber OBJECT-TYPE
SYNTAX INTEGER
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ACCESS read-only
STATUS mandatory
::= { interfaces 1 }
-- the Interfaces table
ifTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfEntry
ACCESS read-write
STATUS mandatory
::= { interfaces 2 }
ifEntry OBJECT-TYPE
SYNTAX IfEntry
ACCESS read-write
STATUS mandatory
::= { ifTable 1 }
IfEntry ::= SEQUENCE {
ifIndex
INTEGER,
ifDescr
OCTET STRING,
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
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Counter,
ifOutOctets
Counter,
ifOutUcastPkts
Counter,
ifOutNUcastPkts
Counter,
ifOutDiscards
Counter,
ifOutErrors
Counter,
ifOutQLen
Gauge
}
ifIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
::= { ifEntry 1 }
ifDescr OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-only
STATUS mandatory
::= { ifEntry 2 }
ifType OBJECT-TYPE
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),
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basicIsdn(20),
primaryIsdn(21),
-- proprietary serial
propPointToPointSerial(22)
}
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
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
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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
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
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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
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
::= { ifEntry 21 }
-- the Address Translation group
atTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtEntry
ACCESS read-write
STATUS mandatory
::= { at 1 }
atEntry OBJECT-TYPE
SYNTAX AtEntry
ACCESS read-write
STATUS mandatory
::= { atTable 1 }
AtEntry ::= SEQUENCE {
atIfIndex
INTEGER,
atPhysAddress
OCTET STRING,
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atNetAddress
NetworkAddress
}
atIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { atEntry 1 }
atPhysAddress OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-write
STATUS mandatory
::= { atEntry 2 }
atNetAddress OBJECT-TYPE
SYNTAX NetworkAddress
ACCESS read-write
STATUS mandatory
::= { atEntry 3 }
-- the IP group
ipForwarding OBJECT-TYPE
SYNTAX INTEGER {
gateway(1), -- entity forwards datagrams
host(2) -- entity does NOT forward datagrams
}
ACCESS read-only
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
McCloghrie & Rose [Page 74]
RFC 1156 MIB May 1990
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
::= { 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
McCloghrie & Rose [Page 75]
RFC 1156 MIB May 1990
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
::= { 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
McCloghrie & Rose [Page 76]
RFC 1156 MIB May 1990
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
IpAddress,
ipAdEntIfIndex
INTEGER,
ipAdEntNetMask
IpAddress,
ipAdEntBcastAddr
INTEGER
}
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 }
McCloghrie & Rose [Page 77]
RFC 1156 MIB May 1990
-- the IP Routing table
ipRoutingTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpRouteEntry
ACCESS read-write
STATUS mandatory
::= { ip 21 }
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
}
ipRouteDest OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 1 }
ipRouteIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 2 }
McCloghrie & Rose [Page 78]
RFC 1156 MIB May 1990
ipRouteMetric1 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 3 }
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 {
McCloghrie & Rose [Page 79]
RFC 1156 MIB May 1990
other(1), -- none of the following
-- non-protocol information
-- 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),
oigp(13)
}
ACCESS read-only
STATUS mandatory
::= { ipRouteEntry 9 }
ipRouteAge OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
::= { ipRouteEntry 10 }
-- 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 }
McCloghrie & Rose [Page 80]
RFC 1156 MIB May 1990
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
::= { 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 }
McCloghrie & Rose [Page 81]
RFC 1156 MIB May 1990
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
::= { 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 }
McCloghrie & Rose [Page 82]
RFC 1156 MIB May 1990
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
::= { 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 }
McCloghrie & Rose [Page 83]
RFC 1156 MIB May 1990
-- 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 [15]
}
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 }
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 }
McCloghrie & Rose [Page 84]
RFC 1156 MIB May 1990
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 }
-- 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
McCloghrie & Rose [Page 85]
RFC 1156 MIB May 1990
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
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
McCloghrie & Rose [Page 86]
RFC 1156 MIB May 1990
STATUS mandatory
::= { tcpConnEntry 5 }
-- 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
::= { 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 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 }
McCloghrie & Rose [Page 87]
RFC 1156 MIB May 1990
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
}
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 }
END
McCloghrie & Rose [Page 88]
RFC 1156 MIB May 1990
7. Acknowledgements
The initial draft of this memo was heavily influenced by the the HEMS
[9] and SNMP [10] MIBs.
Its final form is the result of the suggestions, the dicussions, and
the compromises reached by the members of the IETF MIB working group:
Karl Auerbach, Epilogue Technology
K. Ramesh Babu, Excelan
Lawrence Besaw, Hewlett-Packard
Jeffrey D. Case, University of Tennessee at Knoxville
James R. Davin, Proteon
Mark S. Fedor, NYSERNet
Robb Foster, BBN
Phill Gross, The MITRE Corporation
Bent Torp Jensen, Convergent Technology
Lee Labarre, The MITRE Corporation
Dan Lynch, Advanced Computing Environments
Keith McCloghrie, The Wollongong Group
Dave Mackie, 3Com/Bridge
Craig Partridge, BBN (chair)
Jim Robertson, 3Com/Bridge
Marshall T. Rose, The Wollongong Group
Greg Satz, cisco
Martin Lee Schoffstall, Rensselaer Polytechnic Institute
Lou Steinberg, IBM
Dean Throop, Data General
Unni Warrier, Unisys
McCloghrie & Rose [Page 89]
RFC 1156 MIB May 1990
8. References
[1] Cerf, V., "IAB Recommendations for the Development of Internet
Network Management Standards", RFC 1052, IAB, April 1988.
[2] Information processing systems - Open Systems Interconnection,
"Management Information Services Definition", International
Organization for Standardization, Draft Proposal 9595/2,
December 1987.
[3] Information processing systems - Open Systems Interconnection,
"Management Information Protocol Specification", International
Organization for Standardization, Draft Proposal 9596/2,
December 1987.
[4] Rose M., and K. McCloghrie, "Structure and Identification of
Management Information for TCP/IP-based internets", RFC 1065,
TWG, August 1988.
[5] Partridge C., and G. Trewitt, "The High-Level Entity Management
System (HEMS)", RFCs 1021-1024, BBN and Stanford, October 1987.
[6] Cerf, V., "Report of the Second Ad Hoc Network Management Review
Group", RFC 1109, IAB, August 1989.
[7] 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
[8] Case, J., M. Fedor, M. Schoffstall, 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.
[9] Partridge C., and G. Trewitt, "HEMS Variable Definitions", RFC
1024, BBN and Stanford, October 1987.
[10] Case, J., M. Fedor, M. Schoffstall, and J. Davin, "A Simple
Network Management Protocol", RFC 1067, University of Tennessee
At Knoxville, NYSERNet, Rensselaer Polytechnic, Proteon, August
1988
[11] LaBarre, L., "Structure and Identification of Management
Information for the Internet", Internet Engineering Task Force
working note, Network Information Center, SRI International,
Menlo Park, California, April 1988.
McCloghrie & Rose [Page 90]
RFC 1156 MIB May 1990
[12] LaBarre, L., "Transport Layer Management Information: TCP",
Internet Engineering Task Force working note in preparation.
Network Information Center, SRI International, Menlo Park,
California, (unpublished).
[13] Information processing systems - Open Systems Interconnection,
"Specification of Abstract Syntax Notation One (ASN.1)",
International Organization for Standardization, International
Standard 8824, December 1987.
[14] 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.
[15] Jacobson, V., "Congestion Avoidance and Control", SIGCOMM, 1988,
Stanford, California.
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