I have a customer that has been experiencing issues with their CX modules (they have two of them) for a long time in their ASA's.
What happens is the CX module experiences an issue, causing the ASA's to failover. We have tried many different versions of the ASA and CX software and the issue remains. What appears to happen is the CX data plane goes down. If you fail back straight away the customer experiences a lot of packet loss. Rebooting the ASA and CX module with the issue resolves the problem.
The issue only happens when the CX modules are under load (at our peak times).
We find the CX crashing gets more and more frequent. If we re-image a CX module it might crash once every three months. If usually gets worse and worse, working its way up to crashing weekly. Then we re-image it, and it is much happier again.
This is happening on more than one hardware unit, so it is not likely to be a hardware issue.
I think their is a fundamental issue with the CX module, which is causing corruption and triggers the failover.
I have logged this against a related bug that Cisco have marked as resolved - but the fundamental issue is not resolved. Who else is having issues with their ASA's failing over due to CX module issues?
