With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
smartViNetStpTimeSinceTopologyChange
smart Vi Net Stp Time Since Topology Change
1.3.6.1.4.1.81.27.4.6.1.3
The time (in hundredths of a second) since the last time a topology change was detected by the bridge entity.
Back to SMARTD-MIB MIB page.
IPHost Network monitor allows you to monitor smartViNetStpTimeSinceTopologyChange on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya IP phones right now.