The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.
THIS FIELD NOTICE IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTY OF MERCHANTABILITY. YOUR USE OF THE INFORMATION ON THE FIELD NOTICE OR MATERIALS LINKED FROM THE FIELD NOTICE IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS FIELD NOTICE AT ANY TIME.
Cisco 2800, 3800 and 1560 series APs fail to pass traffic
Wireless clients might intermittently be unable to pass traffic after association.
Due to a software problem in certain Cisco Aironet Access Points (APs), some clients might be unable to pass traffic after association.
A wireless client automatically associates, but after a few seconds it is no longer able to ping its default gateway. If, at that time, this output from the AP CLI is examined:
show controllers dot11Radio 0 client - For the Slot 0 or 2.4 Ghz radio stat
(OR) show controllers dot11Radio 1 client - For the Slot 1 or 5 Ghz radio stat
show controllers nss status
If the client MAC address is present in the show controllers dot11Radio 0 client or show controllers dot11Radio 1 client command output and not present in the show controllers nss status command output, you have encountered this bug.
AP-2802-CLI# show controllers dot11Radio 1 client
mac radio vap aid state encr Maxrate is_wgb_wired wgb_mac_addr
11:22:33:44:55:66 1 3 16 FWD OPEN MCS82SS false 00:00:00:00:00:00
AA:BB:CC:DD:EE:FF 1 3 145 FWD OPEN MCS82SS false 00:00:00:00:00:00
AA:AA:AA:BB:BB:BB 1 2 20 FWD OPEN MCS93SS false 00:00:00:00:00:00
BB:BB:BB:AA:AA:AA 1 2 181 FWD OPEN MCS82SS false 00:00:00:00:00:00
AB:AB:AB:BA:BA:BA 1 4 171 FWD AES_CCM128 MCS82SS false 00:00:00:00:00:00
CC:DD:EE:FF:GG:HH 1 2 98 FWD OPEN MCS82SS false 00:00:00:00:00:00
AP-2802-CLI#show controllers nss status
Current Count: 5
| MAC | OPAQUE |PRI POL|VLAN|BR|TN|QCF|BSS|RADID|MYMAC|
|BB:BB:BB:AA:AA:AA|B8241B94| 1| 0| 1| 1| 0| 2| 1| 0|
|AA:BB:CC:DD:EE:FF|B8241B94| 1| 0| 1| 1| 0| 3| 1| 0|
|AA:AA:AA:BB:BB:BB|B8241B94| 1| 0| 1| 1| 0| 4| 1| 0|
|AB:AB:AB:BA:BA:BA|B8241B94| 1| 0| 1| 1| 0| 2| 1| 0|
|CC:DD:EE:FF:GG:HH|B8241B94| 1| 0| 1| 1| 0| 2| 1| 0|
In the example output, the client MAC address 11:22:33:44:55:66 is not present in the show controller nss status command output and hence the AP has encountered this issue.
The software upgrades are:
188.8.131.52 or later
184.108.40.206 or later
220.127.116.11 or later
18.104.22.168 or later
How to Identify Affected Products
This problem affects only these AP series with the affected software versions noted previously:
Cisco Aironet 1560 Series
Cisco Aironet 2800 Series
Cisco Aironet 3800 Series
Updated the Products Affected and Workaround/Solution Sections
For More Information
For further assistance or for more information about this field notice, contact the Cisco Technical Assistance Center (TAC) using one of the following methods:
Receive Email Notification About New Field Notices
To receive email updates about Field Notices (reliability and safety issues), Security Advisories (network security issues), and end-of-life announcements for specific Cisco products, set up a profile in My Notifications