SNMP

Revision as of 15:47, 16 June 2011

Simple Network Management Protocol (SNMP) is a protocol used in network management systems to monitor attached hardware for changes in operation activity. SNMP provides a standardized approach to monitoring and managing network systems.

TelcoBridges and SNMP

TelcoBridges offers basic support for SNMP versions 1, 2, and 3. More specifically, this grants users the ability to remotely poll (or “GET”) system variables, known as Managed Objects, which are represented in files known as MIB modules. TelcoBridges currently offers polling on standard MIB modules (RTP, Sonet, Trunk, ISDN, etc...) and on the TelcoBridges privately defined module (TB-MIB).
SNMP traps, which are automatically generated by the NetSnmp implementation, are currently supported for the ifTable of the IF-MIB module. This module allows users to monitor the operation status of all network interfaces, and receive notifications when the states change.
Note: The SNMP "SET" ability is not currently supported by TelcoBridges.

The list of MIB modules currently exposed by the TMedia gateways are:

1. RFC 1213 MIB II
   • All tables of the RFC1213-MIB are supported, with the exception of:
     • ipRouteTable
     • EGP group
     • atTable
2. RFC 1573 Evolution of Interfaces Group of MIB-II
   • The following tables are supported:
     • ifTable
     • ifStackTable
3. RFC 2959 Real-Time Transport Protocol Management Information Base
   
   • The following tables of the RTP-MIB are supported:
     • rtpSessionTable
     • rtpSenderTable
     • rtpRcvrTable
4. RFC 2495 DS1, E1, DS2 and E2 Interfaces
   • The following tables are supported: Dsx1ConfigTable, Dsx1CurrentTable, Dsx1IntervalTable, Dsx1TotalTable.
     
5. RFC 2496 - Definitions of Managed Object for the DS3/E3 Interface Type
   • The following tables are supported: Dsx3ConfigTable, Dsx3CurrentTable, Dsx3IntervalTable, Dsx3TotalTable
     
6. RFC 1595 - Definitions of Managed Object for the SONET/SDH Interface Type
   • The following tables of the SONET-MIB are supported:
     • sonetMediumTable
     • sonetSectionCurrentTable
     • sonetSectionIntervalTable
     • sonetLineCurrentTable
     • sonetLineIntervalTable
     • sonetFarendLineCurrentTable
     • sonetFarendLineIntervalTable
     • sonetPathCurrentTable
     • sonetPathIntervalTable
     • sonetFarendPathCurrentTable
     • sonetFarendPathIntervalTable
     • sonetVtCurrentTable
     • sonetVtIntervalTable
     • sonetFarendVtCurrentTable
     • sonetFarendVtIntervalTable

1. RFC 2127 - ISDN Management Information Base using SMIv2

      The following tables supported: isdnBearerGroup, isdnSignalingGroup

1. Telcobridges Private MIB

Further Reading

• Configuring the tbSnmpAgent application

References

• Wikipedia article
• How to relay SNMP on TMG products
• How to install and start NTP on TMG products