With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cdeFastS2CacheId
Cisco DLSW Fast S2 Cache Id
1.3.6.1.4.1.9.9.74.1.6.1.1.10
The Cache ID assigned to this fast cache entry by the partner DLSw. Every Fast cache entry will have a unique id. A management station could use this object by periodically polling this table, and determine whether the same cache entries were present or absent.
Back to CISCO-DLSW-EXT-MIB MIB page.
IPHost Network monitor allows you to monitor cdeFastS2CacheId 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.