With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
mnRegIsAccepted
mn Reg Is Accepted
1.3.6.1.2.1.44.1.3.3.1.1.9
true(1) if the mobile node has received a Registration Reply indicating that service has been accepted; false(2) otherwise. false(2) implies that the registration is still pending.
Back to MIP-MIB MIB page.
IPHost Network monitor allows you to monitor mnRegIsAccepted 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.