With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cXgcpMediaGwLastFailMgcAddr
Cisco Xgcp Media Gw Last Fail Mgc Addr
1.3.6.1.4.1.9.9.318.1.2.1.1.18
This object indicates the address of last MGC which the media gateway had tried to communicate with but failed.
Back to CISCO-XGCP-MIB MIB page.
IPHost Network monitor allows you to monitor cXgcpMediaGwLastFailMgcAddr on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.