With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mnAdvSourceAddress
mn Adv Source Address
1.3.6.1.2.1.44.1.3.2.2.1
The source IP address of the most recently received Agent Advertisement. This address could be the address of a home agent or a foreign agent.
Back to MIP-MIB MIB page.
IPHost Network monitor allows you to monitor mnAdvSourceAddress on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco multiplexers right now.