With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
slbStatsHCZombies
slb Stats HC Zombies
1.3.6.1.4.1.9.9.161.1.1.1.1.15
The number of TCP and UDP connections currently in the zombie state waiting for timers to expire. This is the 64-bit version of slbStatsZombies.
Back to CISCO-SLB-MIB MIB page.
IPHost Network monitor allows you to monitor slbStatsHCZombies 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.