With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cgmGdoiKsTekSrcIdLength
Cisco GDOI Management Gdoi Ks Tek Source Id Length
1.3.6.1.4.1.9.9.759.1.3.3.1.3
The length (i.e. number of octets) of the source ID of a TEK Policy. If no length is given (i.e. it has a value of 0), the default length of its cgmGdoiKsTekSrcIdType should be used as long as it is not reprsented by an ASCII string. If the value has a type that is represented by an ASCII string, a length MUST be included. If the length given is not 0, it should match the 'SRC ID Data Len' field sent in the TEK payload.
Back to CISCO-GDOI-MIB MIB page.
IPHost Network monitor allows you to monitor cgmGdoiKsTekSrcIdLength 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.