ACS 5.2 Error message: 5405 RADIUS Request dropped

[MAGNUS SVENSSON]

The error message "5405  RADIUS Request dropped", what does it meen ?.

We have implemented 802.1X on a C4506 switch running IOS 12.2(53), it has worked fine for about 3 months but now I get users not able to authenticate. In the loggs on the ACS I get the obove message.

ACS 5.2 is running 5.2.0.26 Build 3075.

Has anyone have hade the same problem ?

[magurwara]

Have you resolved the problem?

I started facing this problem when I played around with the dot1x timeout parameters.  I have seen that making these too small causes this problem. I am looking into these but if you share your experience it might help.

--Asim

[smuniswamy1]

I am also getting the same error on ACS 5.2. Any update?

[brock0150]

Have any of you found the cause of your issue?

Thanks,

Brock

[jasonfaraone]

In case anyone else runs into this issue, I believe the following bug is the cause:

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCtr24473&from=summary

[ausjustin]

Anyone knows how can resolve this issue yet ?

Thanks

Justin

[rdvorak]

It's fixed in 5.3...

http://www.cisco.com/en/US/docs/net_mgmt/cisco_secure_access_control_system/5.3/release/notes/acs_53_rn.html

...or stop/start ACS as a workaround till it's happen again.

Kind regards,

Ron