With IPHost Network Monitor you can run simple snmp requests against a Avaya device in your network.
scGenSwitchMasterId
sc Gen Switch Master Id
1.3.6.1.4.1.81.28.1.5.1.1.8
This attribute defines which module in the Xswitch take the role of the Master. It is equal to the slot number of the Xswitch Master.
Back to XSWITCH-MIB MIB page.
IPHost Network monitor allows you to monitor scGenSwitchMasterId 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.