With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cfrExtCircuitSubifIndex
Cisco Frame Relay Ext Circuit Subif Index
1.3.6.1.4.1.9.9.49.1.2.2.1.3
For value greater than zero (0), it indicates the network management interface index for the subinterface associated with this DLCI. Value 0 means the DLCI is not associated with any subinterface.
Back to CISCO-FRAME-RELAY-MIB MIB page.
IPHost Network monitor allows you to monitor cfrExtCircuitSubifIndex on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco wireless switches right now.