With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
nhrpServerStatFwPurgeReply
nhrp Server Statistic Fw Purge Reply
1.3.6.1.3.9999.1.3.3.1.37
The number of NHRP Purge Replies forwarded by this server acting as a transit NHS.
Back to ibm-nhrp MIB page.
IPHost Network monitor allows you to monitor nhrpServerStatFwPurgeReply on IBM device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring IBM computers right now.