topic ACS 5.2 Error message: 5405 RADIUS Request dropped in Network Access Control

ACS 5.2 Error message: 5405 RADIUS Request dropped

MAGNUS SVENSSON — Mon, 11 Mar 2019 00:51:08 GMT

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 ?

ACS 5.2 Error message: 5405 RADIUS Request dropped

magurwara — Wed, 03 Aug 2011 08:55:55 GMT

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

ACS 5.2 Error message: 5405 RADIUS Request dropped

smuniswamy1 — Wed, 10 Aug 2011 19:54:55 GMT

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

ACS 5.2 Error message: 5405 RADIUS Request dropped

brock0150 — Mon, 14 Nov 2011 19:37:16 GMT

Have any of you found the cause of your issue?

Thanks,

Brock

ACS 5.2 Error message: 5405 RADIUS Request dropped

jasonfaraone — Mon, 13 Feb 2012 18:14:05 GMT

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

ACS 5.2 Error message: 5405 RADIUS Request dropped

ausjustin — Mon, 03 Sep 2012 05:34:43 GMT

Anyone knows how can resolve this issue yet ?

Thanks

Justin

ACS 5.2 Error message: 5405 RADIUS Request dropped

rdvorak — Mon, 03 Sep 2012 10:49:32 GMT

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