With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
lhsTxMCast
lhs Tx M Cast
1.3.6.1.4.1.81.19.2.2.1.5
Number of multicast packets transmitted.
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IPHost Network monitor allows you to monitor lhsTxMCast on Avaya device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Avaya switches right now.