Hi,
Our network contains two 4507+E Cisco switches and another two SUP 7L-E.Their IOS was cat4500e-universalk9.SPA.03.07.00.E.152-3.E.bin.
MACsec technology on a communication port channel having two 3850 Stack Cisco switches was used.
Afterwards, one of the switches started experiencing random reboots every couple of days while displaying in show version reload reason
"software critical exception" after each restart.
Checking the logs,this error was being seen: "%C4K_SWITCHINGENGINEMAN-4-VFEIMINTERRUPT: Q.8�)L�d"
Supervisors were upgraded to 3.8.6 and 3.8.1 versions but it did not address the problem.
Rommon was upgraded to cat4500-e-ios-promupgrade-150-1r-SG14 version and it did not solved the issue as well.
VSL Links expansion from 4 GB to 20 GB tried and the restarts were still happening.
Finally, MACsec was removed from its communication link with the Cisco 3850 Stack and it did the trick!
I am still wondering whether Cisco does have any solution for this problem?
regards.