With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgsccpGttSelNAI
Cisco GSCCP Gtt Sel NAI
1.3.6.1.4.1.9.9.335.1.5.1.1.2
Nature of Address Indicator (NAI) for GTT Selector.
Back to CISCO-ITP-GSCCP-MIB MIB page.
IPHost Network monitor allows you to monitor cgsccpGttSelNAI 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.