Network Working Group
Request For Comments: 1156
Obsoletes: RFC 1066
K. McCloghrie
Hughes LAN Systems
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 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

   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].

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.
  1. 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.
  1. Evidence of current use and utility was required.
  1. An attempt was made to limit the number of objects to about 100 to make it easier for vendors to fully instrument their software.
  1. 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.
  1. It was agreed to avoid heavily instrumenting critical sections of code. The general guideline was one counter per critical section per layer.

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

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.

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

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.

          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.

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.

5.2.1. The Interfaces Table

          OBJECT:
          -------
               ifTable { interfaces 2 }

Syntax:

               SEQUENCE OF IfEntry

Definition:

A list of interface entries. The number of entries is given by the value of ifNumber.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ifEntry { ifTable 1 }

Syntax:

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
                        Counter,
                    ifOutOctets
                        Counter,
                    ifOutUcastPkts
                        Counter,
                    ifOutNUcastPkts
                        Counter,
                    ifOutDiscards
                        Counter,
                    ifOutErrors
                        Counter,
                    ifOutQLen
                        Gauge
               }

Definition:

An interface entry containing objects at the subnetwork layer and below for a particular interface.

Access:

read-write.

Status:

mandatory.

We now consider the individual components of each interface entry:

          OBJECT:
          -------
               ifIndex { ifEntry 1 }

Syntax:

               INTEGER

Definition:

A unique value for each interface. Its value ranges between 1 and the value of ifNumber. The value for each interface must remain constant at least from one re- initialization of the entity's network management system to the next re-initialization.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifDescr { ifEntry 2 }

Syntax:

               OCTET STRING

Definition:

A text 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. The string is intended for presentation to a human; it must not contain anything but printable ASCII characters.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifType { ifEntry 3 }

Syntax:

               INTEGER {
                    other(1),          -- none of the following
                    regular1822(2),
                    hdh1822(3),
                    ddn-x25(4),
                    rfc877-x25(5),
                    ethernet-csmacd(6),
                    iso88023-csmacd(7),
                    iso88024-tokenBus(8),
                    iso88025-tokenRing(9),
                    iso88026-man(10),
                    starLan(11),
                    proteon-10MBit(12),
                    proteon-80MBit(13),
                    hyperchannel(14),
                    fddi(15),
                    lapb(16),
                    sdlc(17),
                    t1-carrier(18),
                    cept(19),          -- european equivalent of T-1
                    basicIsdn(20),
                    primaryIsdn(21),
                                        -- proprietary serial
                    propPointToPointSerial(22)
               }

Definition:

The type of interface, distinguished according to the physical/link/network protocol(s) immediately "below" IP in the protocol stack.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifMtu { ifEntry 4 }

Syntax:

               INTEGER

Definition:

The size of the largest IP datagram which can be sent/received on the interface, specified in octets.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifSpeed { ifEntry 5 }

Syntax:

               Gauge

Definition:

An estimate of the interface's current bandwidth in bits per second. For interfaces which do not vary in bandwidth or for those where no accurate estimation can be made, this object should contain the nominal bandwidth.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifPhysAddress { ifEntry 6 }

Syntax:

               OCTET STRING

Definition:

The interface's address at the protocol layer immediately

"below" IP in the protocol stack. For interfaces which do not have such an address (e.g., a serial line), this object should contain an octet string of zero length.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifAdminStatus { ifEntry 7 }

Syntax:

INTEGER {

                    up(1),       -- ready to pass packets
                    down(2),
                    testing(3)   -- in some test mode
                  }

Definition:

The desired state of the interface. The testing(3) state indicates that no operational packets can be passed.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ifOperStatus { ifEntry 8 }

Syntax:

               INTEGER {
                    up(1),       -- ready to pass packets
                    down(2),
                    testing(3)   -- in some test mode
               }

Definition:

The current operational state of the interface. The testing(3) state indicates that no operational packets can be passed.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifLastChange { ifEntry 9 }

Syntax:

               TimeTicks

Definition:

The value of sysUpTime at the time the interface entered its current operational state. If the current state was entered prior to the last re-initialization of the local network management subsystem, then this object contains a zero value.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInOctets { ifEntry 10 }

Syntax:

               Counter

Definition:

The total number of octets received on the interface, including framing characters.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInUcastPkts  { ifEntry 11 }

Syntax:

               Counter

Definition:

The number of (subnet) unicast packets delivered to a higher-layer protocol.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInNUcastPkts { ifEntry 12 }

Syntax:

               Counter

Definition:

The number of non-unicast (i.e., subnet broadcast or subnet multicast) packets delivered to a higher-layer protocol.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInDiscards { ifEntry 13 }

Syntax:

               Counter

Definition:

The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInErrors { ifEntry 14 }

Syntax:

               Counter

Definition:

The number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifInUnknownProtos { ifEntry 15 }

Syntax:

               Counter

Definition:

The number of packets received via the interface which were discarded because of an unknown or unsupported protocol.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifOutOctets { ifEntry 16 }

Syntax:

               Counter

Definition:

The total number of octets transmitted out of the interface, including framing characters.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifOutUcastPkts { ifEntry 17 }

Syntax:

               Counter

Definition:

The total number of packets that higher-level protocols requested be transmitted to a subnet-unicast address, including those that were discarded or not sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
          
              ifOutNUcastPkts { ifEntry 18 }

Syntax:

               Counter

Definition:

The total number of packets that higher-level protocols requested be transmitted to a non-unicast (i.e., a subnet broadcast or subnet multicast) address, including those that were discarded or not sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifOutDiscards { ifEntry 19 }

Syntax:

               Counter

Definition:

The number of outbound packets which were chosen to be discarded even though no errors had been detected to prevent their being transmitted. One possible reason for discarding such a packet could be to free up buffer space.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifOutErrors { ifEntry 20 }

Syntax:

               Counter

Definition:

The number of outbound packets that could not be transmitted because of errors.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ifOutQLen { ifEntry 21 }

Syntax:

               Gauge

Definition:

The length of the output packet queue (in packets).

Access:

read-only.

Status:

mandatory.

5.3. The Address Translation Group

Implementation of the Address Translation group is mandatory for all systems.

The Address Translation group contains one table which is the union across all interfaces of the translation tables for converting a NetworkAddress (e.g., an IP address) into a subnetwork-specific address. For lack of a better term, this document refers to such a subnetwork-specific address as a "physical" address.

   Examples of such translation tables are:  for broadcast media
   where ARP is in use, the translation table is equivalent to
   the ARP cache; or, on an X.25 network where non-algorithmic
   translation to X.121 addresses is required, the translation
   table contains the NetworkAddress to X.121 address
   equivalences.
   
          OBJECT:
          -------
               atTable { at 1 }

Syntax:

               SEQUENCE OF AtEntry

Definition:

The Address Translation tables contain the NetworkAddress to "physical" address equivalences. Some interfaces do not use translation tables for determining address equivalences (e.g., DDN-X.25 has an algorithmic method); if all interfaces are of this type, then the Address Translation table is empty, i.e., has zero entries.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               atEntry { atTable 1 }

Syntax:

AtEntry ::= SEQUENCE {

                    atIfIndex
                        INTEGER,
                    atPhysAddress
                        OCTET STRING,
                    atNetAddress
                        NetworkAddress
               }

Definition:

Each entry contains one NetworkAddress to "physical" address equivalence.

Access:

read-write.

Status:

mandatory.

We now consider the individual components of each Address Translation table entry:

          OBJECT:
          -------
               atIfIndex { atEntry 1 }

Syntax:

               INTEGER

Definition:

The interface on which this entry's equivalence is effective. The interface identified by a particular value of this index is the same interface as identified

by the same value of ifIndex.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               atPhysAddress { atEntry 2 }

Syntax:

               OCTET STRING

Definition:

The media-dependent "physical" address.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               atNetAddress { atEntry 3 }

Syntax:

               NetworkAddress

Definition:

The NetworkAddress (e.g., the IP address) corresponding to the media-dependent "physical" address.

Access:

read-write.

Status:

mandatory.

5.4. The IP Group

Implementation of the IP group is mandatory for all systems.

          OBJECT:
          -------
               ipForwarding { ip 1 }

Syntax:

               INTEGER {
                    gateway(1),   -- entity forwards datagrams
                    host(2)       -- entity does NOT forward datagrams
               }

Definition:

The indication of whether this entity is acting as an IP gateway in respect to the forwarding of datagrams received by, but not addressed to, this entity. IP gateways forward datagrams; Hosts do not (except those Source-Routed via the host).

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipDefaultTTL { ip 2 }

Syntax:

               INTEGER

Definition:

The default value inserted into the Time-To-Live field of the IP header of datagrams originated at this entity, whenever a TTL value is not supplied by the transport layer protocol.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipInReceives { ip 3 }

Syntax:

               Counter

Definition:

The total number of input datagrams received from interfaces, including those received in error.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipInHdrErrors { ip 4 }

Syntax:

               Counter

Definition:

The number of input datagrams discarded due to errors in their IP headers, including bad checksums, version number mismatch, other format errors, time-to-live exceeded, errors discovered in processing their IP options, etc.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipInAddrErrors { ip 5 }

Syntax:

               Counter

Definition:

The number of input datagrams discarded because the IP address in their IP header's destination field was not a valid address to be received at this entity. This count includes invalid addresses (e.g., 0.0.0.0) and addresses of unsupported Classes (e.g., Class E). For entities which are not IP Gateways and therefore do not forward datagrams, this counter includes datagrams discarded because the destination address was not a local address.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipForwDatagrams { ip 6 }

Syntax:

               Counter

Definition:

The number of input datagrams for which this entity was not their final IP destination, as a result of which an attempt was made to find a route to forward them to that final destination. In entities which do not act as IP Gateways, this counter will include only those packets which were Source-Routed via this entity, and the Source-Route option processing was successful.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipInUnknownProtos { ip 7 }

Syntax:

               Counter

Definition:

The number of locally-addressed datagrams received successfully but discarded because of an unknown or unsupported protocol.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipInDiscards { ip 8 }

Syntax:

               Counter

Definition:

The number of input IP datagrams for which no problems were encountered to prevent their continued processing, but which were discarded (e.g. for lack of buffer space). Note that this counter does not include any datagrams discarded while awaiting re-assembly.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipInDelivers { ip 9 }

Syntax:

               Counter

Definition:

The total number of input datagrams successfully delivered to IP user-protocols (including ICMP).

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipOutRequests { ip 10 }

Syntax:

               Counter

Definition:

The total number of IP datagrams which local IP user- protocols (including ICMP) supplied to IP in requests for transmission. Note that this counter does not include any datagrams counted in ipForwDatagrams.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipOutDiscards { ip 11 }

Syntax:

               Counter

Definition:

The number of output IP datagrams for which no problem was encountered to prevent their transmission to their destination, but which were discarded (e.g., for lack of buffer space). Note that this counter would include datagrams counted in ipForwDatagrams if any such packets met this (discretionary) discard criterion.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipOutNoRoutes { ip 12 }

Syntax:

               Counter

Definition:

The number of IP datagrams discarded because no route could be found to transmit them to their destination. Note that this counter includes any packets counted in ipForwDatagrams which meet this "no-route" criterion.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipReasmTimeout { ip 13 }

Syntax:

               INTEGER

Definition:

The maximum number of seconds which received fragments are held while they are awaiting reassembly at this entity.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipReasmReqds { ip 14 }

Syntax:

               Counter

Definition:

The number of IP fragments received which needed to be reassembled at this entity.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipReasmOKs { ip 15 }

Syntax:

               Counter

Definition:

The number of IP datagrams successfully re-assembled.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipReasmFails { ip 16 }

Syntax:

               Counter

Definition:

               The number of failures detected by the IP re-assembly
               algorithm (for whatever reason:  timed out, errors, etc).

Note that this is not necessarily a count of discarded IP fragments since some algorithms (notably RFC 815's) can lose track of the number of fragments by combining them as they are received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipFragOKs { ip 17 }

Syntax:

              Counter

Definition:

The number of IP datagrams that have been successfully fragmented at this entity.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipFragFails { ip 18 }

Syntax:

               Counter

Definition:

The number of IP datagrams that have been discarded because they needed to be fragmented at this entity but could not be, e.g., because their "Don't Fragment" flag was set.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipFragCreates { ip 19 }

Syntax:

               Counter

Definition:

The number of IP datagram fragments that have been generated as a result of fragmentation at this entity.

Access:

read-only.

Status:

mandatory.

5.4.1. The IP Address Table

The Ip Address table contains this entity's IP addressing information.

          OBJECT:
          -------
               ipAddrTable { ip 20 }

Syntax:

               SEQUENCE OF IpAddrEntry

Definition:

The table of addressing information relevant to this entity's IP addresses.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipAddrEntry { ipAddrTable 1 }

Syntax:

               IpAddrEntry ::= SEQUENCE {
                    ipAdEntAddr
                        IpAddress,
                    ipAdEntIfIndex
                        INTEGER,
                    ipAdEntNetMask
                        IpAddress,
                    ipAdEntBcastAddr
                        INTEGER
               }

Definition:

The addressing information for one of this entity's IP addresses.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipAdEntAddr  { ipAddrEntry 1 }

Syntax:

               IpAddress

Definition:

The IP address to which this entry's addressing information pertains.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipAdEntIfIndex  { ipAddrEntry 2 }

Syntax:

               INTEGER

Definition:

The index value which uniquely identifies the interface to which this entry is applicable. The interface identified by a particular value of this index is the

same interface as identified by the same value of ifIndex.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipAdEntNetMask  { ipAddrEntry 3 }

Syntax:

               IpAddress

Definition:

The subnet mask associated with the IP address of this entry. The value of the mask is an IP address with all the network bits set to 1 and all the hosts bits set to 0.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               ipAdEntBcastAddr { ipAddrEntry 4 }

Syntax:

               INTEGER

Definition:

The value of the least-significant bit in the IP broadcast address used for sending datagrams on the (logical) interface associated with the IP address of this entry. For example, when the Internet standard all-ones broadcast address is used, the value will be 1.

Access:

read-only.

Status:

mandatory.

5.4.2. The IP Routing Table

The IP Routing Table contains an entry for each route presently known to this entity. Note that the action to be taken in response to a request to read a non-existent entry, is specific to the network management protocol being used.

          OBJECT:
          -------
               ipRoutingTable { ip 21 }

Syntax:

               SEQUENCE OF IpRouteEntry

Definition:

This entity's IP Routing table.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteEntry { ipRoutingTable 1 }

Syntax:

               IpRouteEntry ::= SEQUENCE {
                    ipRouteDest
                        IpAddress,
                    ipRouteIfIndex
                        INTEGER,
                    ipRouteMetric1
                        INTEGER,
                    ipRouteMetric2
                        INTEGER,
                    ipRouteMetric3
                        INTEGER,
                    ipRouteMetric4
                        INTEGER,
                    ipRouteNextHop
                        IpAddress,
                    ipRouteType
                        INTEGER,
                    ipRouteProto
                        INTEGER,
                    ipRouteAge
                        INTEGER
               }

Definition:

A route to a particular destination.

Access:

read-write.

Status:

mandatory.

We now consider the individual components of each route in the IP Routing Table:

          OBJECT:
          -------
               ipRouteDest { ipRouteEntry 1 }

Syntax:

               IpAddress

Definition:

The destination IP address of this route. An entry with a value of 0.0.0.0 is considered a default route. Multiple such default routes 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.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteIfIndex  { ipRouteEntry 2 }

Syntax:

               INTEGER

Definition:

The index value which uniquely identifies the local interface through which the next hop of this route should be reached. The interface identified by a particular value of this index is the same interface as identified by the same value of ifIndex.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteMetric1 { ipRouteEntry 3 }

Syntax:

               INTEGER

Definition:

The primary routing metric for this route. The semantics of this metric are determined by the routing-protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteMetric2 { ipRouteEntry 4 }

Syntax:

               INTEGER

Definition:

An alternate routing metric for this route. The semantics of this metric are determined by the routing- protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteMetric3 { ipRouteEntry 5 }

Syntax:

               INTEGER

Definition:

An alternate routing metric for this route. The semantics of this metric are determined by the routing- protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteMetric4 { ipRouteEntry 6 }

Syntax:

               INTEGER

Definition:

An alternate routing metric for this route. The semantics of this metric are determined by the routing- protocol specified in the route's ipRouteProto value. If this metric is not used, its value should be set to -1.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteNextHop { ipRouteEntry 7 }

Syntax:

               IpAddress

Definition:

The IP address of the next hop of this route.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteType { ipRouteEntry 8 }

Syntax:

INTEGER {

                    other(1),        -- none of the following
                    
                    invalid(2),      -- an invalidated route
                    
                                     -- route to directly
                    direct(3),       -- connected (sub-)network
               
                                     -- route to a non-local
                    remote(4),       -- host/network/sub-network
               }

Definition:

The type of route.

Access:

read-write.

Status:

mandatory.

          OBJECT:
          -------
               ipRouteProto { ipRouteEntry 9 }

Syntax:

INTEGER {

                    other(1),       -- none of the following
                    
                                    -- non-protocol information,
                                    -- e.g., manually configured
                    local(2),       -- entries
                    
                                    -- set via a network management
                    netmgmt(3),     -- protocol
                    
                                    -- obtained via ICMP,
                    icmp(4),        -- e.g., Redirect
                    
                                    -- the remaining values are
                                    -- all gateway routing protocols
                    egp(5),
               
                    ggp(6),
                    hello(7),
                    rip(8),
                    is-is(9),
                    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.

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.

          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.

Status:

mandatory.

          OBJECT:
          -------
               icmpInSrcQuenchs { icmp 6 }

Syntax:

               Counter

Definition:

The number of ICMP Source Quench messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInRedirects { icmp 7 }

Syntax:

               Counter

Definition:

The number of ICMP Redirect messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInEchos { icmp 8 }

Syntax:

               Counter

Definition:

The number of ICMP Echo (request) messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInEchoReps { icmp 9 }

Syntax:

               Counter

Definition:

The number of ICMP Echo Reply messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInTimestamps { icmp 10 }

Syntax:

               Counter

Definition:

The number of ICMP Timestamp (request) messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInTimestampReps { icmp 11 }

Syntax:

               Counter

Definition:

The number of ICMP Timestamp Reply messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInAddrMasks { icmp 12 }

Syntax:

               Counter

Definition:

The number of ICMP Address Mask Request messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpInAddrMaskReps { icmp 13 }

Syntax:

               Counter

Definition:

The number of ICMP Address Mask Reply messages received.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutMsgs { icmp 14 }

Syntax:

               Counter

Definition:

The total number of ICMP messages which this entity attempted to send. Note that this counter includes all those counted by icmpOutErrors.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutErrors { icmp 15 }

Syntax:

               Counter

Definition:

The number of ICMP messages which this entity did not send due to problems discovered within ICMP such as a lack of buffers. This value should not include errors discovered outside the ICMP layer such as the inability of IP to route the resultant datagram. In some implementations there may be no types of error which contribute to this counter's value.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutDestUnreachs { icmp 16 }

Syntax:

               Counter

Definition:

The number of ICMP Destination Unreachable messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutTimeExcds { icmp 17 }

Syntax:

               Counter

Definition:

The number of ICMP Time Exceeded messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutParmProbs { icmp 18 }

Syntax:

               Counter

Definition:

The number of ICMP Parameter Problem messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutSrcQuenchs { icmp 19 }

Syntax:

               Counter

Definition:

The number of ICMP Source Quench messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutRedirects { icmp 20 }

Syntax:

               Counter

Definition:

The number of ICMP Redirect messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutEchos { icmp 21 }

Syntax:

               Counter

Definition:

The number of ICMP Echo (request) messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutEchoReps { icmp 22 }

Syntax:

               Counter

Definition:

The number of ICMP Echo Reply messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutTimestamps { icmp 23 }

Syntax:

               Counter

Definition:

The number of ICMP Timestamp (request) messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutTimestampReps { icmp 24 }

Syntax:

               Counter

Definition:

The number of ICMP Timestamp Reply messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutAddrMasks { icmp 25 }

Syntax:

               Counter

Definition:

The number of ICMP Address Mask Request messages sent.

Access:

read-only.

Status:

mandatory.

          OBJECT:
          -------
               icmpOutAddrMaskReps { icmp 26 }

Syntax:

               Counter

Definition:

The number of ICMP Address Mask Reply messages sent.

Access:

read-only.

Status:

mandatory.

5.6. The TCP Group

Implementation of the TCP group is mandatory for all systems that implement the TCP protocol.

Note that instances of object types that represent information about a particular TCP connection are transient; they persist only as long as the connection in question.

             OBJECT:
             -------
                  tcpRtoAlgorithm { tcp 1 }

Syntax:

                  INTEGER {
                       other(1),    -- none of the following
                       constant(2), -- a constant rto
                       rsre(3),     -- MIL-STD-1778, Appendix B
                       vanj(4)      -- Van Jacobson's algorithm [15]
                  }

Definition:

The algorithm used to determine the timeout value used for retransmitting unacknowledged octets.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpRtoMin { tcp 2 }

Syntax:

                  INTEGER

Definition:

The minimum value permitted by a TCP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the semantics of the LBOUND quantity described in RFC 793.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpRtoMax { tcp 3 }

Syntax:

                  INTEGER

Definition:

The maximum value permitted by a TCP implementation for the retransmission timeout, measured in milliseconds. More refined semantics for objects of this type depend upon the algorithm used to determine the retransmission timeout. In particular, when the timeout algorithm is rsre(3), an object of this type has the semantics of the UBOUND quantity described in RFC 793.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpMaxConn { tcp 4 }

Syntax:

                  INTEGER

Definition:

The limit on the total number of TCP connections the entity can support. In entities where the maximum number of connections is dynamic, this object should contain the value "-1".

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpActiveOpens { tcp 5 }

Syntax:

                  Counter

Definition:

The number of times TCP connections have made a direct transition to the SYN-SENT state from the CLOSED state.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpPassiveOpens { tcp 6 }

Syntax:

                  Counter

Definition:

The number of times TCP connections have made a direct transition to the SYN-RCVD state from the LISTEN state.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpAttemptFails { tcp 7 }

Syntax:

                  Counter

Definition:

The number of times TCP connections have made a direct transition to the CLOSED state from either the SYN-SENT state or the SYN-RCVD state, plus the number of times TCP connections have made a direct transition to the LISTEN state from the SYN-RCVD state.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpEstabResets { tcp 8 }

Syntax:

                  Counter

Definition:

The number of times TCP connections have made a direct transition to the CLOSED state from either the ESTABLISHED state or the CLOSE-WAIT state.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpCurrEstab { tcp 9 }

Syntax:

                  Gauge

Definition:

The number of TCP connections for which the current state is either ESTABLISHED or CLOSE-WAIT.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpInSegs { tcp 10 }

Syntax:

                  Counter

Definition:

The total number of segments received, including those received in error. This count includes segments received on currently established connections.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpOutSegs { tcp 11 }

Syntax:

                  Counter

Definition:

The total number of segments sent, including those on current connections but excluding those containing only retransmitted octets.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpRetransSegs { tcp 12 }

Syntax:

                  Counter

Definition:

The total number of segments retransmitted - that is, the number of TCP segments transmitted containing one or more previously transmitted octets.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpConnTable { tcp 13 }

Syntax:

                  SEQUENCE OF TcpConnEntry

Definition:

A table containing TCP connection-specific information.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpConnEntry { tcpConnTable 1 }

Syntax:

                  TcpConnEntry ::= SEQUENCE {
                       tcpConnState
                           INTEGER,
                       tcpConnLocalAddress
                           IpAddress,
                       tcpConnLocalPort
                           INTEGER (0..65535),
                       tcpConnRemAddress
                           IpAddress,
                       tcpConnRemPort
                           INTEGER (0..65535)
                  }

Definition:

Information about a particular current TCP connection. An object of this type is transient, in that it ceases to exist when (or soon after) the connection makes the transition to the CLOSED state.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpConnState { tcpConnEntry 1 }

Syntax:

                  INTEGER {
                       closed(1),
                       listen(2),
                       synSent(3),
                       synReceived(4),
                       established(5),
                       finWait1(6),
                       finWait2(7),
                       closeWait(8),
                       lastAck(9),
                       closing(10),
                       timeWait(11)
                  }

Definition:

The state of this TCP connection.

Access:

read-only.

Status:

mandatory.

             OBJECT:
             -------
                  tcpConnLocalAddress { tcpConnEntry 2 }

Syntax:

                  IpAddress

Definition:

The local IP address for this TCP connection.

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 }

Syntax:

                  INTEGER (0..65535)

Definition:

The remote port number for this TCP connection.

Access:

read-only.

Status:

mandatory.

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

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.

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

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.

             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.

Status:

mandatory.

             OBJECT:
             -------
                  egpNeighAddr { egpNeighEntry 2 }

Syntax:

                  IpAddress

Definition:

The IP address of this entry's EGP neighbor.

Access:

read-only.

Status:

mandatory.

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

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
                          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),
                          
                                  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
                          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
                          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,
                  
                      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

                          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

                          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
                          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 }
                  -- 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 }

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 {

                            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 }

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 }

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 }

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 }

-- 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 }

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
                          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

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 }

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

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

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.
  
  [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.

Security Considerations

Security issues are not discussed in this memo.

Authors' Addresses

Keith McCloghrie
The Wollongong Group
1129 San Antonio Road
Palo Alto, CA 04303

Phone:

          (415) 962-7160
   
   EMail: sytek!kzm@HPLABS.HP.COM

Marshall T. Rose
PSI, Inc.
PSI California Office
P.O. Box 391776
Mountain View, CA 94039

Phone:

          (415) 961-3380

EMail:

          mrose@PSI.COM