With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmlrTriggerNai
Cisco Multi-layer Routing Trigger Nai
1.3.6.1.4.1.9.9.396.1.2.1.8
Nature of Address Indicator (NAI) for GTT Selector. This object will default to value based on variant unless the 'nai' bit is set in cmlrTriggerParameters object.
Back to CISCO-ITP-MLR-MIB MIB page.
IPHost Network monitor allows you to monitor cmlrTriggerNai 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.