With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmedxGatewayActiveMgcDomain
cmedx Gateway Active Mgc Domain
1.3.6.1.4.1.9.10.104.1.1.1.1.18
The domain name of the currently active MGC in this media gateway link.
Back to CISCO-MEGACO-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cmedxGatewayActiveMgcDomain on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.