SNMP

The Simple Network Management Protocol (SNMP) is 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.
For information on configuring your TMedia product to use the SNMP protocol, see the section labeled "Related Tasks".

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, DS1, DS3, ISDN, etc...) and on the TelcoBridges privately defined module (TB-MIB).

Supported SNMP MIB modules

1. RFC 1213 MIB II (RFC1213-MIB)
   • 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 (IF-MIB)
   • The following tables are supported:
     • ifTable
     • ifStackTable
3. RFC 2495 DS1, J1, E1, DS2, and E2 Interfaces (DS1-MIB)
   • The following tables of the DS1-MIB are supported:
     • Dsx1ConfigTable
     • Dsx1CurrentTable
     • Dsx1IntervalTable
     • Dsx1TotalTable
4. RFC 2496 - Definitions of Managed Object for the DS3/E3 Interface Type (DS3-MIB)
   • The following tables of the DS3-MIB are supported:
     • Dsx3ConfigTable
     • Dsx3CurrentTable
     • Dsx3IntervalTable
     • Dsx3TotalTable
5. RFC 1595 - Definitions of Managed Object for the SONET/SDH Interface Type (SONET-MIB)
   • The following tables of the SONET-MIB are supported:
     • sonetMediumTable
     • sonetSectionCurrentTable
     • sonetSectionIntervalTable
     • sonetLineCurrentTable
     • sonetLineIntervalTable
     • sonetFarendLineCurrentTable
     • sonetFarendLineIntervalTable
     • sonetPathCurrentTable
     • sonetPathIntervalTable
     • sonetFarendPathCurrentTable
     • sonetFarendPathIntervalTable
     • sonetVtCurrentTable
     • sonetVtIntervalTable
     • sonetFarendVtCurrentTable
     • sonetFarendVtIntervalTable
6. RFC 2127 - ISDN Management Information Base using SMIv2 (ISDN-MIB)
   • The following tables of the ISDN-MIB are supported:
     • isdnBearerGroup
     • isdnSignalingGroup
7. Telcobridges Private MIB module (TB-MIB)
   • tbMtp2
   • tbM2pa
   • tbM2ua
   • tbM3ua
   • tbIua
   • CPU Usage
   • Memory Usage

SNMP traps

SNMP traps are automatically generated by the NetSnmp. The ifTable of the IF-MIB is the only module that can generate SNMP traps.

This module allows users to monitor the operation status of all network interfaces, and receive notifications when the states change.

1. This is the list of element types found in the SNMP interface table (ifTable):
   • Baseboard Ethernet interfaces
   • Trunks Line Interface
   • DS3 Line Interface
   • SONET/SDH Line Interface
   • SONET/SDH Line Service SECTION (VC11/VC12/VT15/VT2)
   • SONET/SDH Line Service PATH (VC4/VC3/STS1/DS3)
   • ISDN Stack
   • ISDN LAPD Link (Primary)
   • ISDN LAPD Link (Backup)
   • ISDN NFAS Stack
   • ISDN NFAS LAPD Link (Primary)
   • ISDN NFAS LAPD Link (Backup)
   • IUA Link
   • IUA Peer
   • LAPD Link
   • SS7 M2PA Link
   • SS7 M2UA Link
   • SS7 M2UA Peer
   • Ss7 M3ua Sap
   • Ss7 M3ua Psp
   • Ss7 M3ua Psrv
   • Ss7 Mtp2 Link

SNMP SET

The SNMP SET command is not supported by TelcoBridges products.

Related Tasks

• Configuring the tbSnmpAgent application
• Introduction to the TelcoBridges Private MIB Module (TB-MIB)
• Installing NetSNMP from an External Host
• How to relay SNMP on TMG products (IMPORTANT: This link is only meaningful if you need SNMPv1 only.)

Other Tasks

• How to install and start NTP on TMG products

External Sources

• Wikipedia article on SNMP
• NetSNMP implementation of the SNMP protocol