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New Member

ACS Error Message :delete 20000 sessions -active sessions are over limit


I have ACS configured with RADIUS .

since 4 days , I have continous alarm saying  " delete 20000 sessions "  active sessions are over limit.

I gone through one of the forum discussion :

whereas it is mentioned that there is bug CSCtj69797 ( Unfortunately i am unable to open this hyperlink ) but when we discussed with Cisco TAC , they do not say anything about this bug however it seems can be ignored this notification since it does not going to affect on any performance.

According to TAC -   mostly some device like ACE is probing to ACS and each probe creates unneccessary session -----

but this is been configured only for RADIUS with wireless set-up so how can ACE comes in picture ?

Does anybody got any workaround or resolution for this ?

New Member

ACS Error Message :delete 20000 sessions -active sessions are ov

Hello Experts,

Can anybody look into this ?

Cisco Employee

ACS Error Message :delete 20000 sessions -active sessions are ov

This usually happens when you have devices like ACE that probe ACS to see if it's alive. They send radius probes constantly without any accounting stop. This always counts as a new session for ACS and this is legitimate.

The problem is the ACE bombarding the ACS.

So ACS cannot track more than 20 000 simultaneous sessions (=authentications and no accounting stop yet received).

Also make sure that you are using accounting properly on all devices then.



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