ERICSSON-ROUTER-TWAMP-MIB

Description: Manages Two-Way Active Measurement Protocol (TWAMP) sessions for measuring IP network delay and loss on Ericsson routers.

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ERICSSON-ROUTER-TWAMP-MIB is an Ericsson vendor-specific MIB that, despite its name suggesting full TWAMP session management, actually models only the alarm/notification layer for TWAMP (Two-Way Active Measurement Protocol) on Ericsson router platforms -- it does not itself expose TWAMP session configuration, delay, jitter, or packet-loss measurement data. Its single eriRouterTwampAlarmActiveTable, indexed by an alarm index, records each currently active TWAMP-related alarm's timestamp (eriRouterTwampAlarmDateAndTime), Ericsson alarm type (eriRouterTwampEriAlarmType), ITU perceived severity (eriRouterTwampAlarmSeverity), and a free-text description. A single notification, eriRouterTwampAlarm, carries all of these objects whenever a TWAMP-related alarm is raised or cleared, making this purely a fault/alarm-surfacing MIB layered on top of TWAMP measurement functionality configured elsewhere on the router. It depends on ERICSSON-ALARM-TC-MIB for its EriAlarmType convention, ITU-ALARM-TC-MIB for perceived severity, and the eriRouterMgmt/ERICSSON-ROUTER-SMI enterprise tree for OID placement. It is deployed on Ericsson routers running TWAMP-based measurement, giving operators ERICSSON-ROUTER-TWAMP-MIB SNMP monitoring of TWAMP subsystem alarms rather than the underlying measurement counters themselves.

An operator subscribes to eriRouterTwampAlarm notifications and polls eriRouterTwampAlarmActiveTable to see currently outstanding TWAMP alarms; an alarm entry with a high ItuPerceivedSeverity and no corresponding clear notification arriving afterward would indicate a persistent TWAMP subsystem fault (for example, a failed reflector session) needing investigation.

Vendor-specific MIB for Ericsson routers with TWAMP (Two-Way Active Measurement Protocol) support; manages performance measurement sessions and metrics for network path quality assessment.