We have a pair of 11506(s) running VIP and interface redundancy. We recently experienced periods of high CPU (95%+) during non-peak traffic times. Our SW ver is 7.1 bld 6; searching the bug toolkit doesn't show any known issues. The CPU doesn't stay up for too long, it does go back down on it's own without intervention, however we can't isolate what's causing the CPU to spike in the first place.
Our CSS(s) have just the 1 head unit and the 2 GE ports. One port is the ISC between the 2 for state and the other is the trunk link to the network.
We have about 80 services configured. Most of those are port 80 and 443 services. The 80 ones are monitored on a script keepalive pulling up and ASP page. The 443 ones are the KAL-AP-SSL script. There are a handful of other services that are just monitored via TCP keepalive type.
The last time it happened we went into debug mode and dropped a show tasks to send off to TAC, waiting on an answer for those. Anyone know of any better commands to drop to find out which process may be tapping the CPU?
Anyone seen this before? Any help would be appreciated.