With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
x21portAdmin
x21port Admin
1.3.6.1.4.1.351.110.5.1.1.1.3.1.1.7
This object is used for administratively changing the status of the port. Up/down used to up and down the port. Default is the up state.
Back to CISCO-WAN-FR-X21-MIB MIB page.
IPHost Network monitor allows you to monitor x21portAdmin 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.