SNMPv2 Management Information Base for the Transmission Control Protocol using SMIv2
RFC 2012

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Network Working Group                              K. McCloghrie, Editor
Request for Comments: 2012                                 Cisco Systems
Updates: 1213                                              November 1996
Category: Standards Track

                   SNMPv2 Management Information Base
           for the Transmission Control Protocol using SMIv2

Status of this Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

IESG Note:

   The IP, UDP, and TCP MIB modules currently support only IPv4.  These
   three modules use the IpAddress type defined as an OCTET STRING of
   length 4 to represent the IPv4 32-bit internet addresses.  (See RFC
   1902, SMI for SNMPv2.)  They do not support the new 128-bit IPv6
   internet addresses.

Table of Contents

   1. Introduction ................................................    1
   2. Definitions .................................................    2
   2.1 The TCP Group ..............................................    3
   2.2 Conformance Information ....................................    8
   2.2.1 Compliance Statements ....................................    8
   2.2.2 Units of Conformance .....................................    9
   3. Acknowledgements ............................................   10
   4. References ..................................................   10
   5. Security Considerations .....................................   10
   6. Editor's Address ............................................   10

1.  Introduction

   A management system contains: several (potentially many) nodes, each
   with a processing entity, termed an agent, which has access to
   management instrumentation; at least one management station; and, a
   management protocol, used to convey management information between
   the agents and management stations.  Operations of the protocol are
   carried out under an administrative framework which defines
   authentication, authorization, access control, and privacy policies.

McCloghrie                  Standards Track                     [Page 1]
RFC 2012                   SNMPv2 MIB for TCP              November 1996

   Management stations execute management applications which monitor and
   control managed elements.  Managed elements are devices such as
   hosts, routers, terminal servers, etc., which are monitored and
   controlled via access to their management information.

   Management information is viewed as a collection of managed objects,
   residing in a virtual information store, termed the Management
   Information Base (MIB).  Collections of related objects are defined
   in MIB modules.  These modules are written using a subset of OSI's
   Abstract Syntax Notation One (ASN.1) [1], termed the Structure of
   Management Information (SMI) [2].

   This document is the MIB module which defines managed objects for
   managing implementations of the Transmission Control Protocol (TCP)
   [3].

   The managed objects in this MIB module were originally defined using
   the SNMPv1 framework as a part of MIB-II [4].  This document defines
   the same objects for TCP using the SNMPv2 framework.

2.  Definitions

TCP-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, Integer32, Gauge32,
    Counter32, IpAddress, mib-2        FROM SNMPv2-SMI
    MODULE-COMPLIANCE, OBJECT-GROUP    FROM SNMPv2-CONF;

tcpMIB MODULE-IDENTITY
    LAST-UPDATED "9411010000Z"
    ORGANIZATION "IETF SNMPv2 Working Group"
    CONTACT-INFO
            "        Keith McCloghrie

             Postal: Cisco Systems, Inc.
                     170 West Tasman Drive
                     San Jose, CA  95134-1706
                     US

             Phone:  +1 408 526 5260
             Email:  kzm@cisco.com"

McCloghrie                  Standards Track                     [Page 2]
RFC 2012                   SNMPv2 MIB for TCP              November 1996

    DESCRIPTION
            "The MIB module for managing TCP implementations."
    REVISION      "9103310000Z"
    DESCRIPTION
            "The initial revision of this MIB module was part of MIB-
            II."
    ::= { mib-2 49 }

-- the TCP group

tcp      OBJECT IDENTIFIER ::= { mib-2 6 }

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 [5]
                }
    MAX-ACCESS  read-only
    STATUS      current
    DESCRIPTION
            "The algorithm used to determine the timeout value used for
            retransmitting unacknowledged octets."