Field Notice: FN70208 - Aironet 1560, 2800, and 3800 Series Access Points Fail to Pass Traffic - Software Upgrade Recommended

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Updated:October 5, 2023
Document ID:FN70208

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Notice

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Products Affected


Affected Software Product Affected Release Affected Release Number Comments
Wireless LAN Controller Software 8.2 8.2.141.0, 8.2.151.0, 8.2.160.0, 8.2.161.0, 8.2.164.0, 8.2.166.0  
Wireless LAN Controller Software 8.4 8.4.100.0  
Wireless LAN Controller Software 8.5 8.5.103.0, 8.5.105.0  

Defect Information


Defect IDHeadline
CSCve57121Cisco 2800, 3800 and 1560 series APs fail to pass traffic

Problem Description


Wireless clients might intermittently be unable to pass traffic after association. 


Background


Due to a software problem in certain Cisco Aironet Access Points (APs), some clients might be unable to pass traffic after association.


Problem Symptom


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.

Example output:

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

Client Configuration:

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.


Workaround/Solution


The software upgrades are:

  • 8.2.170.0
  • 8.3.140.0 or later
  • 8.5.110.0 or later
  • 8.6.101.0 or later
  • 8.7.102.0 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

Revision History


VersionDescriptionSectionDate
2.0Updated the Products Affected and Workaround/Solution Sections—2018-JUN-19
1.0Initial Release—2018-MAY-29

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