With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
nhrpClientHoldTime
nhrp Client Hold Time
1.3.6.1.3.9999.1.2.1.1.11
The hold time the client will register.
Back to NHRP-MIB MIB page.
IPHost Network monitor allows you to monitor nhrpClientHoldTime on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.