RFC draft MIB-II October 1990
Management Information Base for Network Management
of TCP/IP-based internets:
MIB-II
Thu Oct 25 11:13:12 1990
SNMP Working Group
Editors:
Keith McCloghrie
Hughes LAN Systems
kzm@hls.com
Marshall T. Rose
Performance Systems International, Inc.
mrose@psi.com
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
compatibility. However, MIB-I as descrbed in RFC 1156 is full
Standard Protocol of the Internet, while the MIB-II described
here is Proposed Standard Protocol of the Internet.
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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.
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.
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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
Management Information for TCP/IP-based internets, RFC 1155
[12], which describes how managed objects contained in the MIB
are defined; Management Information Base for Network
Management of TCP/IP-based internets: MIB-II, this memo, which
describes the managed objects contained in the MIB (and
supercedes RFC 1156 [13]); and, the Simple Network Management
Protocol, RFC 1098 [5], which defines the protocol used to
manage these objects.
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3. Changes from RFC 1156
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 }
which is identical to the prefix used in MIB-I.
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.
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
K. McCloghrie/M.T. Rose (editors) [Page 4]
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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 [6].
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. Physical Addresses
As a further, textual convention in the MIB, the datatype
PhysAddress ::=
OCTET STRING
is introduced to represent media- or physical-level addresses.
The following objects are now defined in terms of PhysAddress:
ifPhysAddress
atPhysAddress
ipNetToMediaPhysAddress
It should be noted that this change has no effect on either
the syntax nor semantics of these objects. The use of the
PhysAddress notation is merely an artifact of the explanatory
method used in MIB-II and future MIBs.
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3.4. 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.
3.5. 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 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)
ultra(29)
ds3(30)
smds(31)
frame-relay(32)
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.
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3.6. 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., [7]), 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.
3.7. 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.
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The descriptor of the ipRoutingTable object has been changed
to ipRouteTable for consistency with the other IP routing
objects. There are also three new columns in the ipRouteTable
object,
ipRouteMask
ipRouteMetric5
ipRouteInfo
the first is used for IP routing subsystems that support
arbitrary subnet masks, and the latter two are IP routing
protocol-specific.
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).
3.8. The ICMP Group
There are no changes to this group.
3.9. 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.
3.10. The UDP Group
A new table:
udpTable
is added.
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3.11. 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, i.e.,
egpNeighAs
egpNeighInMsgs
egpNeighInErrs
egpNeighOutMsgs
egpNeighOutErrs
egpNeighInErrMsgs
egpNeighOutErrMsgs
egpNeighStateUps
egpNeighStateDowns
egpNeighIntervalHello
egpNeighIntervalPoll
egpNeighMode
egpNeighEventTrigger
a new variable is added:
egpAs
which gives the autonomous system associated with this EGP
entity.
3.12. 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
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RFC draft MIB-II October 1990
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.
3.13. 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 }
3.14. Changes from RFC 1158
Features of this MIB include:
(1) The managed objects in this document have been defined
using the conventions defined in the Internet-standard
SMI, as amended by the extensions specified in [14,16].
It must be emphasized that definitions made using these
extensions are semantically identically to those in RFC
1158.
(2) The PhysAddress textual convention has been introduced to
represent media addresses.
(3) The ACCESS clause of sysLocation is now read-write.
(4) New ifType values (29-32) have been defined.
(5) The definition of ipRouteType has been clarified.
(6) The ipRouteMetric5 and ipRouteInfo objects have been
defined.
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RFC draft MIB-II October 1990
(7) The definition of the egpNeighEventTrigger object has
been clarified.
(8) The textual descriptor of the snmpEnableAuthTraps has
been changed to snmpEnableAuthenTraps.
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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 the subset of Abstract Syntax Notation
One (ASN.1) [8] defined in 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 SMI [12]
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.
The SMI specifies the use of the basic encoding rules of ASN.1
[9], subject to the additional requirements imposed by the
SNMP.
4.1. Format of Definitions
Section 6 contains contains the specification of all object
types contained in this MIB module. The object types are
defined using the conventions defined in the SMI, as amended
by the extensions specified in [14,16].
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5. Overview
Consistent with the IAB directive to produce simple, workable
systems in the short-term, the list of managed objects defined
here, has been derived by taking only those elements which are
considered essential.
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 experimental 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 design of MIB-II is heavily influenced by the first
extensibility mechanism. Several new variables have been
added based on operational experience and need. Based on
this, the criteria for including an object in MIB-II are
remarkably similar to the MIB-I criteria:
(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) In MIB-I, an attempt was made to limit the number of
objects to about 100 to make it easier for vendors to
fully instrument their software. In MIB-II, this limit
was raised given the wide technological base now
implementing MIB-I.
(5) To avoid redundant variables, it was required that no
object be included that can be derived from others in the
MIB.
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RFC draft MIB-II October 1990
(6) Implementation specific 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.
MIB-II, like it predecessor, the Internet-standard MIB,
contains only 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
These groups are the basic unit of conformance: This method is
as follows: if the semantics of a group is applicable to an
implementation, then it must implement all objects in that
group. For example, an implementation must implement the EGP
group if and only if it implements the EGP.
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.
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RFC draft MIB-II October 1990
6. Definitions
RFCxxxx-MIB DEFINITIONS ::= BEGIN
IMPORTS
mgmt, NetworkAddress, IpAddress, Counter, Gauge,
TimeTicks
FROM RFC1155-SMI
OBJECT-TYPE
FROM RFC-oooo
TRAP-TYPE
FROM RFC-tttt;
-- This MIB module uses the extended OBJECT-TYPE macro as
-- defined in [14], and the TRAP-TYPE macro as defined in [15]
-- MIB-II (same prefix as MIB-I)
mib-2 OBJECT IDENTIFIER ::= { mgmt 1 }
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RFC draft MIB-II October 1990
-- textual conventions
DisplayString ::=
OCTET STRING
-- This data type is used to model textual information taken
-- from the NVT ASCII character set. By convention, objects
-- with this syntax are declared as having
--
-- SIZE (0..255)
PhysAddress ::=
OCTET STRING
-- This data type is used to model media addresses.
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RFC draft MIB-II October 1990
-- groups in 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 }
-- historical (some say hysterical)
-- cmot OBJECT IDENTIFIER ::= { mib-2 9 }
transmission OBJECT IDENTIFIER ::= { mib-2 10 }
snmp OBJECT IDENTIFIER ::= { mib-2 11 }
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RFC draft MIB-II October 1990
-- the System group
-- Implementation of the System group is mandatory for all
-- systems. If an agent is not configured to have a value
-- for any of these variables, a string of length 0 is
-- returned.
sysDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { system 1 }
sysObjectID OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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'."
::= { system 2 }
sysUpTime OBJECT-TYPE
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The time (in hundredths of a second) since the
network management portion of the system was last
re-initialized."
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RFC draft MIB-II October 1990
::= { system 3 }
sysContact OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The textual identification of the contact person
for this managed node, together with information
on how to contact this person."
::= { system 4 }
sysName OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"An administratively-assigned name for this
managed node. By convention, this is the node's
fully-qualified domain name."
::= { system 5 }
sysLocation OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The physical location of this node (e.g.,
`telephone closet, 3rd floor')."
::= { system 6 }
sysServices OBJECT-TYPE
SYNTAX INTEGER (0..127)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"A value which indicates the set of services that
this entity may 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
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RFC draft MIB-II October 1990
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."
::= { system 7 }
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RFC draft MIB-II October 1990
-- the Interfaces group
-- Implementation of the Interfaces group is mandatory for
-- all systems.
ifNumber OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of network interfaces (regardless of
their current state) present on this system."
::= { interfaces 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.
ifTable OBJECT-TYPE
SYNTAX SEQUENCE OF IfEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A list of interface entries. The number of
entries is given by the value of ifNumber."
::= { interfaces 2 }
ifEntry OBJECT-TYPE
SYNTAX IfEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"An interface entry containing objects at the
subnetwork layer and below for a particular
interface."
INDEX { ifIndex }
::= { ifTable 1 }
IfEntry ::=
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SEQUENCE {
ifIndex
INTEGER,
ifDescr
DisplayString,
ifType
INTEGER,
ifMtu
INTEGER,
ifSpeed
Gauge,
ifPhysAddress
PhysAddress,
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
K. McCloghrie/M.T. Rose (editors) [Page 22]
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}
ifIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ifEntry 1 }
ifDescr OBJECT-TYPE
SYNTAX DisplayString (SIZE (0..255))
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { 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),
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RFC draft MIB-II October 1990
t1-carrier(18),
cept(19), -- european equiv. of T-1
basicISDN(20),
primaryISDN(21), -- proprietary serial
propPointToPointSerial(22),
ppp(23),
softwareLoopback(24),
eon(25), -- CLNP over IP [11]
ethernet-3Mbit(26),
nsip(27), -- XNS over IP
slip(28), -- generic SLIP
ultra(29), -- ULTRA technologies
ds3(30),
smds(31),
frame-relay(32)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The type of interface, distinguished according to
the physical/link protocol(s) immediately `below'
the network layer in the protocol stack."
::= { ifEntry 3 }
ifMtu OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ifEntry 4 }
ifSpeed OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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
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RFC draft MIB-II October 1990
estimation can be made, this object should contain
the nominal bandwidth."
::= { ifEntry 5 }
ifPhysAddress OBJECT-TYPE
SYNTAX PhysAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { 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
DESCRIPTION
"The desired state of the interface. The
testing(3) state indicates that no operational
packets can be passed."
::= { 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
DESCRIPTION
"The current operational state of the interface.
The testing(3) state indicates that no operational
packets can be passed."
::= { ifEntry 8 }
ifLastChange OBJECT-TYPE
K. McCloghrie/M.T. Rose (editors) [Page 25]
RFC draft MIB-II October 1990
SYNTAX TimeTicks
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ifEntry 9 }
ifInOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of octets received on the
interface, including framing characters."
::= { ifEntry 10 }
ifInUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of subnetwork-unicast packets
delivered to a higher-layer protocol."
::= { ifEntry 11 }
ifInNUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of non-unicast (i.e., subnetwork-
broadcast or subnetwork-multicast) packets
delivered to a higher-layer protocol."
::= { ifEntry 12 }
ifInDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
K. McCloghrie/M.T. Rose (editors) [Page 26]
RFC draft MIB-II October 1990
"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."
::= { ifEntry 13 }
ifInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of inbound packets that contained
errors preventing them from being deliverable to a
higher-layer protocol."
::= { ifEntry 14 }
ifInUnknownProtos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of packets received via the interface
which were discarded because of an unknown or
unsupported protocol."
::= { ifEntry 15 }
ifOutOctets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of octets transmitted out of the
interface, including framing characters."
::= { ifEntry 16 }
ifOutUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of packets that higher-level
protocols requested be transmitted to a
subnetwork-unicast address, including those that
K. McCloghrie/M.T. Rose (editors) [Page 27]
RFC draft MIB-II October 1990
were discarded or not sent."
::= { ifEntry 17 }
ifOutNUcastPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ifEntry 18 }
ifOutDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ifEntry 19 }
ifOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of outbound packets that could not be
transmitted because of errors."
::= { ifEntry 20 }
ifOutQLen OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The length of the output packet queue (in
packets)."
::= { ifEntry 21 }
K. McCloghrie/M.T. Rose (editors) [Page 28]
RFC draft MIB-II October 1990
ifSpecific OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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, any any
conformant implementation of ASN.1 and BER must be
able to generate and recognize this value. "
::= { ifEntry 22 }
K. McCloghrie/M.T. Rose (editors) [Page 29]
RFC draft MIB-II October 1990
-- 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.
atTable OBJECT-TYPE
SYNTAX SEQUENCE OF AtEntry
ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"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."
::= { at 1 }
atEntry OBJECT-TYPE
SYNTAX AtEntry
ACCESS not-accessible
STATUS deprecated
DESCRIPTION
"Each entry contains one NetworkAddress to
`physical' address equivalence."
K. McCloghrie/M.T. Rose (editors) [Page 30]
RFC draft MIB-II October 1990
INDEX { atIfIndex,
atNetAddress }
::= { atTable 1 }
AtEntry ::=
SEQUENCE {
atIfIndex
INTEGER,
atPhysAddress
PhysAddress,
atNetAddress
NetworkAddress
}
atIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS deprecated
DESCRIPTION
"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."
::= { atEntry 1 }
atPhysAddress OBJECT-TYPE
SYNTAX PhysAddress
ACCESS read-write
STATUS deprecated
DESCRIPTION
"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 dissasociates 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
K. McCloghrie/M.T. Rose (editors) [Page 31]
RFC draft MIB-II October 1990
examination of the relevant atPhysAddress object."
::= { atEntry 2 }
atNetAddress OBJECT-TYPE
SYNTAX NetworkAddress
ACCESS read-write
STATUS deprecated
DESCRIPTION
"The NetworkAddress (e.g., the IP address)
corresponding to the media-dependent `physical'
address."
::= { atEntry 3 }
K. McCloghrie/M.T. Rose (editors) [Page 32]
RFC draft MIB-II October 1990
-- the IP group
-- Implementation of the IP group is mandatory for all
-- systems.
ipForwarding OBJECT-TYPE
SYNTAX INTEGER {
forwarding(1), -- acting as a gateway
not-forwarding(2) -- NOT acting as a gateway
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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)."
::= { ip 1 }
ipDefaultTTL OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ip 2 }
ipInReceives OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of input datagrams received from
interfaces, including those received in error."
::= { ip 3 }
ipInHdrErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
K. McCloghrie/M.T. Rose (editors) [Page 33]
RFC draft MIB-II October 1990
"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."
::= { ip 4 }
ipInAddrErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 5 }
ipForwDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 6 }
ipInUnknownProtos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of locally-addressed datagrams
K. McCloghrie/M.T. Rose (editors) [Page 34]
RFC draft MIB-II October 1990
received successfully but discarded because of an
unknown or unsupported protocol."
::= { ip 7 }
ipInDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 8 }
ipInDelivers OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of input datagrams successfully
delivered to IP user-protocols (including ICMP)."
::= { ip 9 }
ipOutRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 10 }
ipOutDiscards OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of output IP datagrams for which no
problem was encountered to prevent their
K. McCloghrie/M.T. Rose (editors) [Page 35]
RFC draft MIB-II October 1990
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."
::= { ip 11 }
ipOutNoRoutes OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 12 }
ipReasmTimeout OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The maximum number of seconds which received
fragments are held while they are awaiting
reassembly at this entity."
::= { ip 13 }
ipReasmReqds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of IP fragments received which needed
to be reassembled at this entity."
::= { ip 14 }
ipReasmOKs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
K. McCloghrie/M.T. Rose (editors) [Page 36]
RFC draft MIB-II October 1990
"The number of IP datagrams successfully re-
assembled."
::= { ip 15 }
ipReasmFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 16 }
ipFragOKs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of IP datagrams that have been
successfully fragmented at this entity."
::= { ip 17 }
ipFragFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ip 18 }
ipFragCreates OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of IP datagram fragments that have
been generated as a result of fragmentation at
K. McCloghrie/M.T. Rose (editors) [Page 37]
RFC draft MIB-II October 1990
this entity."
::= { ip 19 }
-- the IP address table
-- The IP address table contains this entity's IP addressing
-- information.
ipAddrTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpAddrEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The table of addressing information relevant to
this entity's IP addresses."
::= { ip 20 }
ipAddrEntry OBJECT-TYPE
SYNTAX IpAddrEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The addressing information for one of this
entity's IP addresses."
INDEX { ipAdEntAddr,
INTEGER OPTIONAL }
::= { ipAddrTable 1 }
IpAddrEntry ::=
SEQUENCE {
ipAdEntAddr
IpAddress,
ipAdEntIfIndex
INTEGER,
ipAdEntNetMask
IpAddress,
ipAdEntBcastAddr
INTEGER,
ipAdEntReasmMaxSize
INTEGER (0..65535)
}
ipAdEntAddr OBJECT-TYPE
SYNTAX IpAddress
K. McCloghrie/M.T. Rose (editors) [Page 38]
RFC draft MIB-II October 1990
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The IP address to which this entry's addressing
information pertains."
::= { ipAddrEntry 1 }
ipAdEntIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ipAddrEntry 2 }
ipAdEntNetMask OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ipAddrEntry 3 }
ipAdEntBcastAddr OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ipAddrEntry 4 }
K. McCloghrie/M.T. Rose (editors) [Page 39]
RFC draft MIB-II October 1990
ipAdEntReasmMaxSize OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The size of the largest IP datagram which this
entity can re-assemble from incoming IP fragmented
datagrams received on this interface."
::= { ipAddrEntry 5 }
-- the IP routing table
-- The IP routing table contains an entry for each route
-- presently known to this entity.
ipRouteTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpRouteEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"This entity's IP Routing table."
::= { ip 21 }
ipRouteEntry OBJECT-TYPE
SYNTAX IpRouteEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A route to a particular destination."
INDEX { ipRouteDest,
INTEGER OPTIONAL }
::= { ipRouteTable 1 }
IpRouteEntry ::=
SEQUENCE {
ipRouteDest
IpAddress,
ipRouteIfIndex
INTEGER,
ipRouteMetric1
INTEGER,
ipRouteMetric2
INTEGER,
ipRouteMetric3
K. McCloghrie/M.T. Rose (editors) [Page 40]
RFC draft MIB-II October 1990
INTEGER,
ipRouteMetric4
INTEGER,
ipRouteNextHop
IpAddress,
ipRouteType
INTEGER,
ipRouteProto
INTEGER,
ipRouteAge
INTEGER,
ipRouteMask
IpAddress,
ipRouteMetric5
INTEGER,
ipRouteInfo
OCTET STRING
}
ipRouteDest OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 1 }
ipRouteIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 2 }
K. McCloghrie/M.T. Rose (editors) [Page 41]
RFC draft MIB-II October 1990
ipRouteMetric1 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 3 }
ipRouteMetric2 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 4 }
ipRouteMetric3 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 5 }
ipRouteMetric4 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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,
K. McCloghrie/M.T. Rose (editors) [Page 42]
RFC draft MIB-II October 1990
its value should be set to -1."
::= { ipRouteEntry 6 }
ipRouteNextHop OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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.)"
::= { 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
DESCRIPTION
"The type of route. Note that remote(4) does not
refer to the type of link used to reach the next
hop, but rather is correct only when the
ipRouteNextHop and ipRouteDest are known to be
distinct systems.
Setting this object to the value invalid(2) has
the effect of invalidating the corresponding entry
in the ipRouteTable object. That is, it
effectively dissasociates 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.
K. McCloghrie/M.T. Rose (editors) [Page 43]
RFC draft MIB-II October 1990
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."
::= { ipRouteEntry 8 }
ipRouteProto OBJECT-TYPE
SYNTAX INTEGER {
other(1), -- none of the following
-- non-protocol information,
-- e.g., manually configured
local(2), -- entries
-- set via a network
netmgmt(3), -- management 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),
es-is(10),
ciscoIgrp(11),
bbnSpfIgp(12),
ospf(13),
bgp(14)
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 9 }
ipRouteAge OBJECT-TYPE
K. McCloghrie/M.T. Rose (editors) [Page 44]
RFC draft MIB-II October 1990
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 10 }
ipRouteMask OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipRouteEntry 11 }
ipRouteMetric5 OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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,
K. McCloghrie/M.T. Rose (editors) [Page 45]
RFC draft MIB-II October 1990
its value should be set to -1."
::= { ipRouteEntry 12 }
ipRouteInfo OBJECT-TYPE
SYNTAX OCTET STRING
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Routing protocol-specific information,
interpreted according to the correspondent value
of ipRouteProto for this entry. As MIBs are
defined for each routing protocol, each MIB
indicates how this information is interpreted.
For routing entries in which this information is
undefined, this object should contain an octet
string of zero length."
::= { ipRouteEntry 13 }
-- the IP Address Translation table
-- The IP address translation table 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.
ipNetToMediaTable OBJECT-TYPE
SYNTAX SEQUENCE OF IpNetToMediaEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The IP Address Translation table used for mapping
from IP addresses to physical addresses."
::= { ip 22 }
ipNetToMediaEntry OBJECT-TYPE
SYNTAX IpNetToMediaEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Each entry contains one IpAddress to `physical'
address equivalence."
INDEX { ipNetToMediaIfIndex,
K. McCloghrie/M.T. Rose (editors) [Page 46]
RFC draft MIB-II October 1990
ipNetToMediaNetAddress }
::= { ipNetToMediaTable 1 }
IpNetToMediaEntry ::=
SEQUENCE {
ipNetToMediaIfIndex
INTEGER,
ipNetToMediaPhysAddress
PhysAddress,
ipNetToMediaNetAddress
IpAddress,
ipNetToMediaType
INTEGER
}
ipNetToMediaIfIndex OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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."
::= { ipNetToMediaEntry 1 }
ipNetToMediaPhysAddress OBJECT-TYPE
SYNTAX PhysAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The media-dependent `physical' address."
::= { ipNetToMediaEntry 2 }
ipNetToMediaNetAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-write
STATUS mandatory
DESCRIPTION
"The IpAddress corresponding to the media-
dependent `physical' address."
::= { ipNetToMediaEntry 3 }
ipNetToMediaType OBJECT-TYPE
K. McCloghrie/M.T. Rose (editors) [Page 47]
RFC draft MIB-II October 1990
SYNTAX INTEGER {
other(1), -- none of the following
invalid(2), -- an invalidated mapping
dynamic(3),
static(4)
}
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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
dissasociates 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."
::= { ipNetToMediaEntry 4 }
K. McCloghrie/M.T. Rose (editors) [Page 48]
RFC draft MIB-II October 1990
-- the ICMP group
-- Implementation of the ICMP group is mandatory for all
-- systems.
icmpInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of ICMP messages which the
entity received. Note that this counter includes
all those counted by icmpInErrors."
::= { icmp 1 }
icmpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP messages which the entity
received but determined as having ICMP-specific
errors (bad ICMP checksums, bad length, etc.)."
::= { icmp 2 }
icmpInDestUnreachs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Destination Unreachable
messages received."
::= { icmp 3 }
icmpInTimeExcds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Time Exceeded messages
received."
::= { icmp 4 }
icmpInParmProbs OBJECT-TYPE
SYNTAX Counter
K. McCloghrie/M.T. Rose (editors) [Page 49]
RFC draft MIB-II October 1990
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Parameter Problem messages
received."
::= { icmp 5 }
icmpInSrcQuenchs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Source Quench messages
received."
::= { icmp 6 }
icmpInRedirects OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Redirect messages received."
::= { icmp 7 }
icmpInEchos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Echo (request) messages
received."
::= { icmp 8 }
icmpInEchoReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Echo Reply messages received."
::= { icmp 9 }
icmpInTimestamps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
K. McCloghrie/M.T. Rose (editors) [Page 50]
RFC draft MIB-II October 1990
DESCRIPTION
"The number of ICMP Timestamp (request) messages
received."
::= { icmp 10 }
icmpInTimestampReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Timestamp Reply messages
received."
::= { icmp 11 }
icmpInAddrMasks OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Address Mask Request messages
received."
::= { icmp 12 }
icmpInAddrMaskReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Address Mask Reply messages
received."
::= { icmp 13 }
icmpOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of ICMP messages which this
entity attempted to send. Note that this counter
includes all those counted by icmpOutErrors."
::= { icmp 14 }
icmpOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
K. McCloghrie/M.T. Rose (editors) [Page 51]
RFC draft MIB-II October 1990
STATUS mandatory
DESCRIPTION
"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."
::= { icmp 15 }
icmpOutDestUnreachs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Destination Unreachable
messages sent."
::= { icmp 16 }
icmpOutTimeExcds OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Time Exceeded messages sent."
::= { icmp 17 }
icmpOutParmProbs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Parameter Problem messages
sent."
::= { icmp 18 }
icmpOutSrcQuenchs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Source Quench messages sent."
::= { icmp 19 }
K. McCloghrie/M.T. Rose (editors) [Page 52]
RFC draft MIB-II October 1990
icmpOutRedirects OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Redirect messages sent. For a
host, this object will always be zero, since hosts
do not send redirects."
::= { icmp 20 }
icmpOutEchos OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Echo (request) messages sent."
::= { icmp 21 }
icmpOutEchoReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Echo Reply messages sent."
::= { icmp 22 }
icmpOutTimestamps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Timestamp (request) messages
sent."
::= { icmp 23 }
icmpOutTimestampReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Timestamp Reply messages
sent."
::= { icmp 24 }
icmpOutAddrMasks OBJECT-TYPE
K. McCloghrie/M.T. Rose (editors) [Page 53]
RFC draft MIB-II October 1990
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Address Mask Request messages
sent."
::= { icmp 25 }
icmpOutAddrMaskReps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of ICMP Address Mask Reply messages
sent."
::= { icmp 26 }
K. McCloghrie/M.T. Rose (editors) [Page 54]
RFC draft MIB-II October 1990
-- 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.
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 [10]
}
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The algorithm used to determine the timeout value
used for retransmitting unacknowledged octets."
::= { tcp 1 }
tcpRtoMin OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { tcp 2 }
tcpRtoMax OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
K. McCloghrie/M.T. Rose (editors) [Page 55]
RFC draft MIB-II October 1990
DESCRIPTION
"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."
::= { tcp 3 }
tcpMaxConn OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { tcp 4 }
tcpActiveOpens OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times TCP connections have made a
direct transition to the SYN-SENT state from the
CLOSED state."
::= { tcp 5 }
tcpPassiveOpens OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of times TCP connections have made a
direct transition to the SYN-RCVD state from the
LISTEN state."
::= { tcp 6 }
tcpAttemptFails OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
K. McCloghrie/M.T. Rose (editors) [Page 56]
RFC draft MIB-II October 1990
STATUS mandatory
DESCRIPTION
"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."
::= { tcp 7 }
tcpEstabResets OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { tcp 8 }
tcpCurrEstab OBJECT-TYPE
SYNTAX Gauge
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of TCP connections for which the
current state is either ESTABLISHED or CLOSE-
WAIT."
::= { tcp 9 }
tcpInSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of segments received, including
those received in error. This count includes
segments received on currently established
connections."
::= { tcp 10 }
tcpOutSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
K. McCloghrie/M.T. Rose (editors) [Page 57]
RFC draft MIB-II October 1990
DESCRIPTION
"The total number of segments sent, including
those on current connections but excluding those
containing only retransmitted octets."
::= { tcp 11 }
tcpRetransSegs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of segments retransmitted - that
is, the number of TCP segments transmitted
containing one or more previously transmitted
octets."
::= { tcp 12 }
-- the TCP Connection table
-- The TCP connection table contains information about this
-- entity's existing TCP connections.
tcpConnTable OBJECT-TYPE
SYNTAX SEQUENCE OF TcpConnEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table containing TCP connection-specific
information."
::= { tcp 13 }
tcpConnEntry OBJECT-TYPE
SYNTAX TcpConnEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"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."
INDEX { tcpConnLocalAddress,
tcpConnLocalPort,
tcpConnRemAddress,
tcpConnRemPort }
K. McCloghrie/M.T. Rose (editors) [Page 58]
RFC draft MIB-II October 1990
::= { 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
DESCRIPTION
"The state of this TCP connection."
::= { tcpConnEntry 1 }
tcpConnLocalAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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
K. McCloghrie/M.T. Rose (editors) [Page 59]
RFC draft MIB-II October 1990
0.0.0.0 is used."
::= { tcpConnEntry 2 }
tcpConnLocalPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The local port number for this TCP connection."
::= { tcpConnEntry 3 }
tcpConnRemAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The remote IP address for this TCP connection."
::= { tcpConnEntry 4 }
tcpConnRemPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The remote port number for this TCP connection."
::= { tcpConnEntry 5 }
-- additional TCP objects
tcpInErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of segments received in error
(e.g., bad TCP checksums)."
::= { tcp 14 }
tcpOutRsts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of TCP segments sent containing the
K. McCloghrie/M.T. Rose (editors) [Page 60]
RFC draft MIB-II October 1990
RST flag."
::= { tcp 15 }
-- the UDP group
-- Implementation of the UDP group is mandatory for all
-- systems which implement the UDP.
udpInDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of UDP datagrams delivered to
UDP users."
::= { udp 1 }
udpNoPorts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of received UDP datagrams for
which there was no application at the destination
port."
::= { udp 2 }
udpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of received UDP datagrams that could
not be delivered for reasons other than the lack
of an application at the destination port."
::= { udp 3 }
udpOutDatagrams OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of UDP datagrams sent from this
entity."
::= { udp 4 }
K. McCloghrie/M.T. Rose (editors) [Page 61]
RFC draft MIB-II October 1990
-- 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.
udpTable OBJECT-TYPE
SYNTAX SEQUENCE OF UdpEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"A table containing UDP listener information."
::= { udp 5 }
udpEntry OBJECT-TYPE
SYNTAX UdpEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Information about a particular current UDP
listener."
INDEX { udpLocalAddress, udpLocalPort }
::= { udpTable 1 }
UdpEntry ::=
SEQUENCE {
udpLocalAddress
IpAddress,
udpLocalPort
INTEGER (0..65535)
}
udpLocalAddress OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { udpEntry 1 }
udpLocalPort OBJECT-TYPE
SYNTAX INTEGER (0..65535)
K. McCloghrie/M.T. Rose (editors) [Page 62]
RFC draft MIB-II October 1990
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The local port number for this UDP listener."
::= { udpEntry 2 }
K. McCloghrie/M.T. Rose (editors) [Page 63]
RFC draft MIB-II October 1990
-- the EGP group
-- Implementation of the EGP group is mandatory for all
-- systems which implement the EGP.
egpInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP messages received without
error."
::= { egp 1 }
egpInErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP messages received that proved
to be in error."
::= { egp 2 }
egpOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of locally generated EGP
messages."
::= { egp 3 }
egpOutErrors OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of locally generated EGP messages not
sent due to resource limitations within an EGP
entity."
::= { egp 4 }
-- the EGP Neighbor table
-- The EGP neighbor table contains information about this
K. McCloghrie/M.T. Rose (editors) [Page 64]
RFC draft MIB-II October 1990
-- entity's EGP neighbors.
egpNeighTable OBJECT-TYPE
SYNTAX SEQUENCE OF EgpNeighEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"The EGP neighbor table."
::= { egp 5 }
egpNeighEntry OBJECT-TYPE
SYNTAX EgpNeighEntry
ACCESS not-accessible
STATUS mandatory
DESCRIPTION
"Information about this entity's relationship with
a particular EGP neighbor."
INDEX { egpNeighAddr }
::= { egpNeighTable 1 }
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
K. McCloghrie/M.T. Rose (editors) [Page 65]
RFC draft MIB-II October 1990
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
DESCRIPTION
"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."
::= { egpNeighEntry 1 }
egpNeighAddr OBJECT-TYPE
SYNTAX IpAddress
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The IP address of this entry's EGP neighbor."
::= { egpNeighEntry 2 }
egpNeighAs OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The autonomous system of this EGP peer. Zero
should be specified if the autonomous system
number of the neighbor is not yet known."
::= { egpNeighEntry 3 }
K. McCloghrie/M.T. Rose (editors) [Page 66]
RFC draft MIB-II October 1990
egpNeighInMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP messages received without error
from this EGP peer."
::= { egpNeighEntry 4 }
egpNeighInErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP messages received from this EGP
peer that proved to be in error (e.g., bad EGP
checksum)."
::= { egpNeighEntry 5 }
egpNeighOutMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of locally generated EGP messages to
this EGP peer."
::= { egpNeighEntry 6 }
egpNeighOutErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of locally generated EGP messages not
sent to this EGP peer due to resource limitations
within an EGP entity."
::= { egpNeighEntry 7 }
egpNeighInErrMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP-defined error messages received
from this EGP peer."
K. McCloghrie/M.T. Rose (editors) [Page 67]
RFC draft MIB-II October 1990
::= { egpNeighEntry 8 }
egpNeighOutErrMsgs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP-defined error messages sent to
this EGP peer."
::= { egpNeighEntry 9 }
egpNeighStateUps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP state transitions to the UP
state with this EGP peer."
::= { egpNeighEntry 10 }
egpNeighStateDowns OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The number of EGP state transitions from the UP
state to any other state with this EGP peer."
::= { egpNeighEntry 11 }
egpNeighIntervalHello OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The interval between EGP Hello command
retransmissions (in hundredths of a second). This
represents the t1 timer as defined in RFC 904."
::= { egpNeighEntry 12 }
egpNeighIntervalPoll OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The interval between EGP poll command
K. McCloghrie/M.T. Rose (editors) [Page 68]
RFC draft MIB-II October 1990
retransmissions (in hundredths of a second). This
represents the t3 timer as defined in RFC 904."
::= { egpNeighEntry 13 }
egpNeighMode OBJECT-TYPE
SYNTAX INTEGER { active(1), passive(2) }
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The polling mode of this EGP entity, either
passive or active."
::= { egpNeighEntry 14 }
egpNeighEventTrigger OBJECT-TYPE
SYNTAX INTEGER { start(1), stop(2) }
ACCESS read-write
STATUS mandatory
DESCRIPTION
"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'.
When set, this variable causes a Start or Stop
event on the specified neighbor, as specified on
pages 8-10 of RFC 904. Briefly, a Start event
causes an Idle peer to begin neighbor acquisition
and a non-Iddle peer to reinitiate neighbor
acquisition. A stop event causes a non-Idle peer
to return to the Idle state until a Start event
occurs."
::= { egpNeighEntry 15 }
-- additional EGP objects"
egpAs OBJECT-TYPE
SYNTAX INTEGER
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The autonomous system number of this EGP entity."
K. McCloghrie/M.T. Rose (editors) [Page 69]
RFC draft MIB-II October 1990
::= { egp 6 }
K. McCloghrie/M.T. Rose (editors) [Page 70]
RFC draft MIB-II October 1990
-- 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.
K. McCloghrie/M.T. Rose (editors) [Page 71]
RFC draft MIB-II October 1990
-- 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 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 station.
snmpInPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of PDUs delivered to the SNMP
entity from the transport service."
::= { snmp 1 }
snmpOutPkts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP PDUs which were passed
from the SNMP protocol entity to the transport
service."
::= { snmp 2 }
snmpInBadVersions OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of syntactically correct SNMP
PDUs which were delivered to the SNMP protocol
entity and were for an unsupported SNMP version."
::= { snmp 3 }
snmpInBadCommunityNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP PDUs delivered to the
SNMP protocol entity which used a SNMP community
K. McCloghrie/M.T. Rose (editors) [Page 72]
RFC draft MIB-II October 1990
name not known to said entity."
::= { snmp 4 }
snmpInBadCommunityUses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { snmp 5 }
snmpInASNParseErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of ASN.1 parsing errors (either
in encoding or syntax) encountered by the SNMP
protocol entity when decoding received SNMP PDUs."
::= { snmp 6 }
snmpInBadTypes OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP PDUs delivered to the
SNMP protocol entity which had an unknown PDU
type."
::= { snmp 7 }
snmpInTooBigs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for
which the value of the error-status field is
`tooBig'."
::= { snmp 8 }
K. McCloghrie/M.T. Rose (editors) [Page 73]
RFC draft MIB-II October 1990
snmpInNoSuchNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for
which the value of the error-status field is
`noSuchName'."
::= { snmp 9 }
snmpInBadValues OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for
which the value of the error-status field is
`badValue'."
::= { snmp 10 }
snmpInReadOnlys OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for
which the value of the error-status field is
`readOnly'."
::= { snmp 11 }
snmpInGenErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
delivered to the SNMP protocol entity and for
which the value of the error-status field is
`genErr'."
::= { snmp 12 }
snmpInTotalReqVars OBJECT-TYPE
K. McCloghrie/M.T. Rose (editors) [Page 74]
RFC draft MIB-II October 1990
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { snmp 13 }
snmpInTotalSetVars OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"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."
::= { snmp 14 }
snmpInGetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Request PDUs which
have been accepted and processed by the SNMP
protocol entity."
::= { snmp 15 }
snmpInGetNexts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Next PDUs which have
been accepted and processed by the SNMP protocol
entity."
::= { snmp 16 }
snmpInSetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
K. McCloghrie/M.T. Rose (editors) [Page 75]
RFC draft MIB-II October 1990
DESCRIPTION
"The total number of SNMP Set-Request PDUs which
have been accepted and processed by the SNMP
protocol entity."
::= { snmp 17 }
snmpInGetResponses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Response PDUs which
have been accepted and processed by the SNMP
protocol entity."
::= { snmp 18 }
snmpInTraps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Trap PDUs which have
been accepted and processed by the SNMP protocol
entity."
::= { snmp 19 }
snmpOutTooBigs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
generated by the SNMP protocol entity and for
which the value of the error-status field is
`tooBig.'"
::= { snmp 20 }
snmpOutNoSuchNames OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
generated by the SNMP protocol entity and for
which the value of the error-status is
K. McCloghrie/M.T. Rose (editors) [Page 76]
RFC draft MIB-II October 1990
`noSuchName'."
::= { snmp 21 }
snmpOutBadValues OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
generated by the SNMP protocol entity and for
which the value of the error-status field is
`badValue'."
::= { snmp 22 }
snmpOutReadOnlys OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
generated by the SNMP protocol entity and for
which the value of the error-status field is
`readOnly'."
::= { snmp 23 }
snmpOutGenErrs OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number valid SNMP PDUs which were
generated by the SNMP protocol entity and for
which the value of the error-status field is
`genErr'."
::= { snmp 24 }
snmpOutGetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Request PDUs which
have been generated by the SNMP protocol entity."
::= { snmp 25 }
K. McCloghrie/M.T. Rose (editors) [Page 77]
RFC draft MIB-II October 1990
snmpOutGetNexts OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Next PDUs which have
been generated by the SNMP protocol entity."
::= { snmp 26 }
snmpOutSetRequests OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Set-Request PDUs which
have been generated by the SNMP protocol entity."
::= { snmp 27 }
snmpOutGetResponses OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Get-Response PDUs which
have been generated by the SNMP protocol entity."
::= { snmp 28 }
snmpOutTraps OBJECT-TYPE
SYNTAX Counter
ACCESS read-only
STATUS mandatory
DESCRIPTION
"The total number of SNMP Trap PDUs which have
been generated by the SNMP protocol entity."
::= { snmp 29 }
snmpEnableAuthenTraps OBJECT-TYPE
SYNTAX INTEGER { enabled(1), disabled(2) }
ACCESS read-write
STATUS mandatory
DESCRIPTION
"Indicates whether the SNMP agent process is
configured to generate authentication-failure
traps."
::= { snmp 30 }
K. McCloghrie/M.T. Rose (editors) [Page 78]
RFC draft MIB-II October 1990
-- generic-traps for use with the SNMP
coldStart TRAP-TYPE
ENTERPRISE snmp
DESCRIPTION
"A coldStart trap signifies that the sending
protocol entity is reinitializing itself such
that the agent's configuration or the rotocol
entity implementation may be altered."
::= 0
warmStart TRAP-TYPE
ENTERPRISE snmp
DESCRIPTION
"A warmStart trap signifies that the sending
protocol entity is reinitializing itself such
that neither the agent configuration nor the
protocol entity implementation is altered."
::= 1
linkDown TRAP-TYPE
ENTERPRISE snmp
VARIABLES { ifIndex }
DESCRIPTION
"A linkDown trap signifies that the sending
protocol entity recognizes a failure in one of
the communication links represented in the
agent's configuration."
::= 2
linkUp TRAP-TYPE
ENTERPRISE snmp
VARIABLES { ifIndex }
DESCRIPTION
"A linkUp trap signifies that the sending
protocol entity recognizes that one of the
communication links represented in the agent's
configuration has come up."
::= 3
authenticationFailure TRAP-TYPE
ENTERPRISE snmp
DESCRIPTION
"An authenticationFailure trap signifies that
the sending protocol entity is the addressee
K. McCloghrie/M.T. Rose (editors) [Page 79]
RFC draft MIB-II October 1990
of a protocol message that is not properly
authenticated. While implementations of the
SNMP must be capable of generating this trap,
they must also be capable of suppressing the
emission of such traps via an implementation-
specific mechanism."
::= 4
egpNeighborLoss TRAP-TYPE
ENTERPRISE snmp
VARIABLES { egpNeighAddr }
DESCRIPTION
"An egpNeighborLoss trap signifies that an EGP
neighbor for whom the sending protocol entity
was an EGP peer has been marked down and the
peer relationship no longer obtains."
::= 5
END
K. McCloghrie/M.T. Rose (editors) [Page 80]
RFC draft MIB-II October 1990
7. 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
Mark S. Fedor, PSI
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 (chair)
Greg Satz, cisco
Martin Lee Schoffstall, PSI
Bob Stewart, Xyplex
Geoff Thompson, Synoptics
Bill Versteeg, Network Research Corporation
Wengyik Yeong, PSI
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
K. McCloghrie/M.T. Rose (editors) [Page 81]
RFC draft MIB-II October 1990
8. References
[1] V. Cerf, IAB Recommendations for the Development of
Internet Network Management Standards. Internet Working
Group Request for Comments 1052. Network Information
Center, SRI International, Menlo Park, California,
(April, 1988).
[2] M.T. Rose and K. McCloghrie, Structure and Identification
of Management Information for TCP/IP-based internets,
Internet Working Group Request for Comments 1065.
Network Information Center, SRI International, Menlo
Park, California, (August, 1988).
[3] K. McCloghrie and M.T. Rose, Management Information Base
for Network Management of TCP/IP-based internets,
Internet Working Group Request for Comments 1066.
Network Information Center, SRI International, Menlo
Park, California, (August, 1988).
[4] V. Cerf, Report of the Second Ad Hoc Network Management
Review Group, Internet Working Group Request for Comments
1109. Network Information Center, SRI International,
Menlo Park, California, (August, 1989).
[5] J.D. Case, M.S. Fedor, M.L. Schoffstall, and J.R. Davin,
Simple Network Management Protocol, Internet Working
Group Request for Comments 1098. Network Information
Center, SRI International, Menlo Park, California,
(April, 1989).
[6] J.B. Postel, TELNET Protocol Specification, Internet
Working Group Request for Comments 854. Network
Information Center, SRI International, Menlo Park,
California, (May, 1983).
[7] G. Satz, CLNS MIB, Internet Working Group Request for
Comments 1162. Network Information Center, SRI
International, Menlo Park, California, (June, 1990).
[8] Information processing systems - Open Systems
Interconnection - Specification of Abstract Syntax
Notation One (ASN.1), International Organization for
Standardization. International Standard 8824, (December,
1987).
K. McCloghrie/M.T. Rose (editors) [Page 82]
RFC draft MIB-II October 1990
[9] 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).
[10] V. Jacobson, Congestion Avoidance and Control, SIGCOMM
1988, Stanford, California.
[11] R.A. Hagens, N.E. Hall, M.T. Rose, Use of the Internet as
a subnetwork for experimentation with the OSI network
layer, Internet Working Group Request for Comments 1070,
Network Information Center, SRI International, Menlo
Park, California, (February, 1989).
[12] M. Rose, K. McCloghrie, Structure and Identification of
Management Information for TCP/IP-based Internets,
Internet Working Group Request for Comments 1155, Network
Information Center, SRI International, Menlo Park,
California, (May, 1990).
[13] J.D. Case, M.S. Fedor, M.L. Schoffstall, and J.R. Davin,
Simple Network Management Protocol, Internet Working
Group Request for Comments 1157. Network Information
Center, SRI International, Menlo Park, California, (May,
1990).
[14] M.T. Rose, K. McCloghrie (editors), Towards Concise MIB
Definitions, Internet Draft, Internet Engineering Task
Force, (September, 1990).
[15] M.T. Rose (editor), A Convention for Defining Traps for
use with the SNMP, Internet Draft, Internet Engineering
Task Force, (September, 1990).
K. McCloghrie/M.T. Rose (editors) [Page 83]
RFC draft MIB-II October 1990
9. Security Considerations
Security issues are not discussed in this memo.
K. McCloghrie/M.T. Rose (editors) [Page 84]
RFC draft MIB-II October 1990
Table of Contents
1 Status of this Memo ................................... 1
2 Introduction .......................................... 3
3 Changes from RFC 1156 ................................. 4
3.1 Deprecated Objects .................................. 4
3.2 Display Strings ..................................... 4
3.3 Physical Addresses .................................. 5
3.4 The System Group .................................... 6
3.5 The Interfaces Group ................................ 6
3.6 The Address Translation Group ....................... 7
3.7 The IP Group ........................................ 7
3.8 The ICMP Group ...................................... 8
3.9 The TCP Group ....................................... 8
3.10 The UDP Group ...................................... 8
3.11 The EGP Group ...................................... 9
3.12 The Transmission Group ............................. 9
3.13 The SNMP Group ..................................... 10
3.14 Changes from RFC 1158 .............................. 10
4 Objects ............................................... 12
4.1 Format of Definitions ............................... 12
5 Overview .............................................. 13
6 Definitions ........................................... 15
6.1 Textual Conventions ................................. 16
6.2 Groups in MIB-II .................................... 17
6.3 The System Group .................................... 18
6.4 The Interfaces Group ................................ 21
6.5 The Address Translation Group ....................... 30
6.6 The IP Group ........................................ 33
6.7 The ICMP Group ...................................... 49
6.8 The TCP Group ....................................... 55
6.9 The UDP Group ....................................... 61
6.9 The EGP Group ....................................... 64
6.10 The Transmission Group ............................. 71
6.11 The SNMP Group ..................................... 72
6.11.1 Generic-Traps for use with the SNMP .............. 79
7 Acknowledgements ...................................... 81
8 References ............................................ 82
9 Security Considerations ............................... 84
K. McCloghrie/M.T. Rose (editors) [Page 85]
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