With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cssSwitchPortDuplexAdmin
css Switch Port Duplex Admin
1.3.6.1.4.1.9.10.44.1.4.1.1.7
Set to fullDuplex(1) to operate in full duplex mode: port will allow simultaneous transmit and receive which can double its bandwidth. Set to halfDuplex(2) to operate in normal mode. Set to autoNegotiate(3) to allow the switch to negotiate the duplex status with the other end of the connection.
Back to CISCO-SIBU-STACKABLE-DUAL-SPEED-HUB-MIB MIB page.
IPHost Network monitor allows you to monitor cssSwitchPortDuplexAdmin 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.