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Cisco Bug: CSCvt37835 - 9800 client unable to associate due to DOT11_STATUS_DENIED_RATES when extended rates are used

Last Modified

Aug 29, 2020

Products (6)

  • Cisco Catalyst 9800 Series Wireless Controllers
  • Cisco Catalyst 9800-40 Wireless Controller
  • Cisco Catalyst 9800-L-C Wireless Controller
  • Cisco Catalyst 9800-L-F Wireless Controller
  • Cisco Catalyst 9800-80 Wireless Controller
  • Cisco Catalyst 9800-CL Wireless Controller for Cloud

Known Affected Releases


Description (partial)

Client is not able to associate to 2.4ghz SSID when 11b is disabled and client is sending assoc_req with 11b as supported and 11g as extended supported rates.
Client receives an assoc_resp failure
Following logs are seen in ra_traces:
Dot11 validate radio rates. 11g rates are set to basic. Rejecting association request of 11b client on radio: DOT11_RADIO_TYPE_BG
Dot11 update co assoc fail. Sending association failure to client: DOT11_STATUS_DENIED_RATES
dot11 send association response. Sending association response with resp_status_code: 18

Observed in 9800 when 11b rates are disabled and only 11g rates are enabled
NOTE - This issue is specific to this particular type of zebra clients. this config would work with many of the clients in market

Related Community Discussions

Catalyst 9800 with 9115 AP strange datarate behavior
Ok, amongst all the bugs I have encountered with the Catalyst 9800 running 16.12.1 this one is just weird. Certain types of clients who only support 2.4GHz are denied onto the network due to missing datarates. The funny thing is two-fold. The AP's on the WLC received an RF-tag which in the beginning disabled the b-datarates and put 12 and 24 as mandatory rates.  However the main network setting is still at default where 1,2,5.5,11 are mandatory rates.  I didn't realise this until after I "solved" ...
Latest activity: Jul 05, 2020
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