I am trying to troubleshoot an issue where one of our core 4506's has a very slow response time for a couple minutes once a week at exactly the same time.
Response times go from <1ms to 1.5s and then return to normal. This affects some servers / services more than others with some losing connectivity completely.
The logs say nothing the processor usage doesn't really change
TAC have looked at logs and can find no obvious issues.
There are no big backup jobs starting at this time (I doubt that that would kill the switch even if they were)
Could anyone give me any ideas of any possible causes of this? We are now really scratching our heads!
C4506 running Sup IV