With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
ciscoIfExtensionTableIntfGroup1
cisco If Extension Table Intf Group1
1.3.6.1.4.1.9.9.276.2.2.3
A collection of objects containing information about properties of interfaces.
Back to CISCO-IF-EXTENSION-MIB MIB page.
IPHost Network monitor allows you to monitor ciscoIfExtensionTableIntfGroup1 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.