With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
c64SonetAPSWorkPortStatus
Cisco 6400NSP Sonet APS Work Port Status
1.3.6.1.4.1.9.10.27.1.1.8.1.9
in working port.
Back to CISCO-6400-CHASSIS-MIB MIB page.
IPHost Network monitor allows you to monitor c64SonetAPSWorkPortStatus on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco firewalls right now.