With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
dsgIfDownChannelListIndex
dsg If Down Channel List Index
The index of a the downstream frequency channel lists, dsgIfChannelListIndex in the dsgIfChannelListTable providing the list of downstream frequencies that contain DSG tunnels.
Back to DSG-IF-MIB MIB page.
IPHost Network monitor allows you to monitor dsgIfDownChannelListIndex 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.