With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
broadMauIfIndex
broad Mau If Index
1.3.6.1.2.1.26.3.1.1.1
This variable uniquely identifies the interface to which the MAU described by this entry is connected.
Back to MAU-MIB MIB page.
IPHost Network monitor allows you to monitor broadMauIfIndex 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.
