With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
portIndex
port Index
1.3.6.1.4.1.52.4.12.30.1.2.1.1.1
A unique value for each port. Its value ranges from 1 to the total number of ports.
Back to CALISTA-DPA-MIB MIB page.
IPHost Network monitor allows you to monitor portIndex 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.