ACE 20 | Slow access to All serverfarm of a particular Context when Traffic Increases on one serverfarm/VIP
We are Facng a typical issue and scraching Head since sometime Now and Now seek help and sugesstions
I have a ACE with 10 Context. Now There is a Particular Context which have 6 server farms and all have under different VI.
Have raised Multiple TAC cases and Captured Millions of Packets but no reason. The ACE resource and CPU Usage is Normal and no increase noticed.
Issues Happening is that when connection to one serverfarm cross 1000, all other serverfarms and VIP of that context are facing very very slowness ,and they have no relation with each other both Physically and Fictionally
If any of you have heard of similar issue can you refer me a solution if the issue is with ACE
Is it a particular serverfarm where connections go above 1000 and you face problem or it doesn't matter ? Please check the overall resource usage in all the contexts of ACE. Have you guaranteed minimum resource to the context or there is no minimum and context uses global pool? It is always recommended to have minimum resource limit guaranteed.
Also, we can see if "slowness" is induced by ACE or is it server or something else which is causing the delay. The best option is to take pcaps before and after ACE and see if packet gets delayed while traversing through the ACE.
You should also take two instances of show tech while you are facing the problem and get it analyzed by TAC to see if they see any counters increase which may be causing the issue.
All the serverfarms in context exhibiting the issue because on one serverfarm connection count increases above 1000 is clear indication of resource crunch or some device in front which has rate limit applied. Cannot always blame the ACE:).
Moquery is the command line cousin of Vizore, it's very helpful and efficient sometimes during the troubleshooting. This article aims to provide moquery cheat sheet to the users for some most common seen scenarios.
Here is the checklist before customers/partners contact Cisco TAC:
Firmware Version of APIC and Switch
Download Switch and APIC techsupport logs
Problem description (Symptoms with details)
Business impact (eg, what kind of services...
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