With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdpCacheDuplex
Cisco Discovery Protocol Cache Duplex
1.3.6.1.4.1.9.9.23.1.2.1.1.12
The remote device's interface's duplex mode, as reported in the most recent CDP message. The value unknown(1) indicates no duplex mode field (TLV) was reported in the most recent CDP message.
Back to CISCO-CDP-MIB MIB page.
IPHost Network monitor allows you to monitor cdpCacheDuplex 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.
