With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
cseUcastCacheSrcMask
CISCO SWITCH ENGINE Ucast Cache Source Mask
1.3.6.1.4.1.9.9.97.1.6.1.1.7
If instantiated, specified and applicable, the source address mask will be applied to the value of cseUcastCacheSource in the same row instance. Its value can not be modified when the corresponding instance of cseUcastCacheStatus is 'active'.
Back to CISCO-SWITCH-ENGINE-MIB MIB page.
IPHost Network monitor allows you to monitor cseUcastCacheSrcMask on Cisco device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.