With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
promBridgePortDesignatedRoot
prom Bridge Port Designated Root
1.3.6.1.4.1.2167.5.1.3.1.1.6
The bridge recorded as root for this port's segment. See dot1dStpPortDesignatedRoot.
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IPHost Network monitor allows you to monitor promBridgePortDesignatedRoot on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya routers right now.