With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
scEthPortGoodUnicastPktsRec
sc Eth Port Good Unicast Packets Rec
1.3.6.1.4.1.81.28.2.1.1.1.40
The total number of good packets received that were directed to a unicast address.
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IPHost Network monitor allows you to monitor scEthPortGoodUnicastPktsRec 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.