With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cmsPortType
cms Port Type
1.3.6.1.4.1.9.9.721.1.1.2.1.1
This object indicates the port type.
Back to CISCO-MLD-SNOOPING-MIB MIB page.
IPHost Network monitor allows you to monitor cmsPortType on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco optical switches right now.