With IPHost Network Monitor you can run simple snmp requests against a IBM device in your network.
nhrpClientTable
nhrp Client Table
1.3.6.1.3.9999.1.2.1
Information about NHRP clients (NHCs) managed by this agent.
Back to ibm-nhrp MIB page.
IPHost Network monitor allows you to monitor nhrpClientTable 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.