RFC1157-SNMP device MIB details by RFC

RFC1157-SNMP file content

The SNMP protocol is used to for conveying information and commands between agents and managing entities. SNMP uses the User Datagram Protocol (UDP) as the transport protocol for passing data between managers and agents. The reasons for using UDP for SNMP are, firstly it has low overheads in comparison to TCP, which uses a 3-way hand shake for connection. Secondly, in congested networks, SNMP over TCP is a bad idea because TCP in order to maintain reliability will flood the network with retransmissions.

Management information (MIB) is represented as a collection of managed objects. These objects together form a virtual information base called MIB. An agent may implement many MIBs, but all agents must implement a particular MIB called MIB-II [16]. This standard defines variables for things such as interface statistics (interface speeds, MTU, octets sent, octets received, etc.) as well as various other things pertaining to the system itself (system location, system contact, etc.). The main goal of MIB-II is to provide general TCP/IP management information.

Use ActiveXperts Network Monitor 2024 to import vendor-specific MIB files, inclusing RFC1157-SNMP.

Vendor:	RFC
Mib:	RFC1157-SNMP  [download]
Tool:	ActiveXperts Network Monitor 2024 [download]    (ships with advanced SNMP/MIB tools)

-- WinAgents MIB Extraction Wizard
-- Extracted from rfc1157.txt 16.03.2005 20:20:14

RFC1157-SNMP DEFINITIONS ::= BEGIN

 IMPORTS
     ObjectName, ObjectSyntax, NetworkAddress, IpAddress, TimeTicks
         FROM RFC1155-SMI;


     -- top-level message

     Message ::=
             SEQUENCE {
                 version          -- version-1 for this RFC
                     INTEGER {
                         version-1(0)
                     },

                 community        -- community name
                     OCTET STRING,

                 data             -- e.g., PDUs if trivial
                     ANY          -- authentication is being used
             }


     -- protocol data units

     PDUs ::=
             CHOICE {
                         get-request
                             GetRequest-PDU,

                         get-next-request
                             GetNextRequest-PDU,

                         get-response
                             GetResponse-PDU,

                         set-request
                             SetRequest-PDU,

                         trap
                             Trap-PDU
                     }




     -- PDUs

     GetRequest-PDU ::=
         [0]
             IMPLICIT PDU

     GetNextRequest-PDU ::=
         [1]
             IMPLICIT PDU

     GetResponse-PDU ::=
         [2]
             IMPLICIT PDU

     SetRequest-PDU ::=
         [3]
             IMPLICIT PDU

     PDU ::=
             SEQUENCE {
                request-id
                     INTEGER,

                 error-status      -- sometimes ignored
                     INTEGER {
                         noError(0),
                         tooBig(1),
                         noSuchName(2),
                         badValue(3),
                         readOnly(4),
                         genErr(5)
                     },

                 error-index       -- sometimes ignored
                    INTEGER,

                 variable-bindings -- values are sometimes ignored
                     VarBindList
             }

     Trap-PDU ::=
         [4]
            IMPLICIT SEQUENCE {
                 enterprise        -- type of object generating
                                   -- trap, see sysObjectID in [5]


                     OBJECT IDENTIFIER,

                 agent-addr        -- address of object generating
                     NetworkAddress, -- trap

                 generic-trap      -- generic trap type
                     INTEGER {
                         coldStart(0),
                         warmStart(1),
                         linkDown(2),
                         linkUp(3),
                         authenticationFailure(4),
                         egpNeighborLoss(5),
                         enterpriseSpecific(6)
                     },

                 specific-trap  -- specific code, present even
                     INTEGER,   -- if generic-trap is not
                                -- enterpriseSpecific

                 time-stamp     -- time elapsed between the last
                     TimeTicks, -- (re)initialization of the  network
                                -- entity and the generation of the trap

                  variable-bindings -- "interesting" information
                     VarBindList
             }


     -- variable bindings

     VarBind ::=
             SEQUENCE {
                 name
                     ObjectName,

                 value
                     ObjectSyntax
             }

    VarBindList ::=
             SEQUENCE OF
                VarBind

    END