VISM-SESSION-MIB

MIB Reference — IPNetwork Monitor · Updated September 09, 2026

All MIBsVISM-SESSION-MIB

Category: VoIP and Telephony

Description: Manages voice session configuration, codec negotiation, and call statistics on Cisco VISM modules.

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What Is VISM-SESSION-MIB?

VISM-SESSION-MIB is a Cisco vendor MIB for the Voice Interworking Service Module (VISM) that manages voice session configuration, codec negotiation, and call statistics for voice-over-ATM/IP trunking. It exposes session-set tables tracking group counts, active group assignment, switchover success/failure counts, and fault-tolerance configuration, alongside session-group objects for call handling. Its monitoring relevance covers both configuration and fault/performance status — vismSessionSetSwitchFails and vismSessionSetSwitchSuccesses track redundancy switchover reliability, while vismSessionSetState and vismSessionSetRowStatus reveal whether a session set is operational, helping detect failed voice-trunking group failovers or provisioning issues. It is part of Cisco's VISM voice interworking architecture and works alongside VISM-LAPD-MIB for signaling. It is typically deployed on Cisco VISM service modules within MGX/AXIS voice gateway platforms, where VISM-SESSION-MIB SNMP monitoring tracks session-group failover reliability.

IPNetwork Monitor allows you to monitor SNMP objects defined in VISM-SESSION-MIB. Use the built-in SNMP Monitoring Browser to explore available variables, view their current values and descriptions, and select the objects you want to monitor. You can then create SNMP monitors, configure thresholds, and receive alerts when monitored values change.

Supported Devices

  • Cisco VISM voice interworking service modules (MGX/AXIS platforms)

Monitoring Examples

An admin polls vismSessionSetTable/vismSessionSetEntry keyed by vismSessionSetNum to check vismSessionSetState and vismSessionSetActiveGrp against vismSessionSetTotalGrps, and reviews vismSessionSetSwitchFails versus vismSessionSetSwitchSuccesses to gauge redundancy reliability. A rising vismSessionSetSwitchFails count alongside vismSessionSetFaultTolerant enabled would indicate the session group failover mechanism itself is malfunctioning, risking call drops during a switchover.

What Can Be Monitored

  • session set state and row status
  • active vs total session groups
  • switchover success/failure counts
  • fault-tolerance configuration
Imported Objects

From BASIS-MIB

voiceOBJECT-IDENTITY

From RFC-1212

OBJECT-TYPE

From RFC1155-SMI

Counter
IpAddress

From RFC1213-MIB

DisplayString
OIDs

RFC description

Manages RUDP session configuration and parameters on Cisco VISM devices for fault-tolerant MGC connections.

Start monitoring Cisco VISM voice interworking service modules (MGX/AXIS platforms) (session-group switchover success/failure status) with a free 30-day trial of IPNetwork Monitor. Import MIBs, browse SNMP OIDs, create custom SNMP monitors, configure alerts, and monitor any SNMP-enabled network device from a single console.

Download VISM-SESSION-MIB