With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
nhrpPurgeReplyExpected
nhrp Purge Reply Expected
An indication of whether this Purge Request has the 'N' Bit cleared (off).
Back to NHRP-MIB MIB page.
IPHost Network monitor allows you to monitor nhrpPurgeReplyExpected on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.