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MAGNUS SVENSSON
Beginner

ACS 5.2 Error message: 5405 RADIUS Request dropped

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 ?

6 REPLIES 6
magurwara
Beginner

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

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

brock0150
Beginner

Have any of you found the cause of your issue?

Thanks,

Brock

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

Anyone knows how can resolve this issue yet ?

Thanks

Justin

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

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