ACS 3.2 breaks down when the RDBMS isn't available.

Someone knows a problem connecting equipment that auths to ACS 3.2 if their ACS (ODBC) login record is down?

I have not checked this bug yet but we have picked up our computer (postgresql) of ODBC logging, it was moved to another building. Throughout the weekend that the computer was down and I couldn't log into any of my ACS devices controlled (switches, AS5200). As soon as the computer was brought back online connections have started working again.

I did not see this listed in the notes, but I may have missed. In any case I'm check if anyone else has experienced this problem and ask yourself how do I solve this problem (at least it was a bad surprise, luckly I hadn't started wireless auth to the GBA unit)

Thank you

Wes

It is likely, although probably not documented anywhere.

At the time current ACS works as follows:

When ODBC is configured, ACS blocks authentication until the

Log ODBC is done or has failed due to the delay. The failure of ODBC timeout

occurs when the external database is unreachable. In this case, the

authentication fails if this delay is longer than the

timeout for the device.

Workaround to activate authentication despite the failure of logging is to increase the radius-server on the device/NAS (for example time-out

5 to 10 seconds). It can be done using the following CLI command:

"radius-server timeout 10". You may need to increase it even more depending on how long the wait time is on your ODBC database.

There is an enhancement request in to have the GBA behavior has changed, you can see here (http://www.cisco.com/cgi-bin/Support/Bugtool/onebug.pl?bugid=CSCeb21974&Submit=Search). Because he considered a request for improvement, don't hold your breath waiting for that, playing with delays so that you don't get hit by it again.

Tags: Cisco Security

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