With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
promBufferHighStaleDrops
prom Buffer High Stale Drops
1.3.6.1.4.1.2167.3.7.1.1.13
The count of the number of high priority frames dropped due to being in the high priority queue too long (the frame aged out).
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IPHost Network monitor allows you to monitor promBufferHighStaleDrops 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.