This page provides important alerts from Cisco Wireless TAC regarding our wireless LAN products (primarily access points and WLCs.) To automatically be notified of updates, log in, then scroll down to the bottom of the main body of the article, where you see the "Rating" button - before you get into the Comments section - and click the little "Follow" next to the [Reply] button.
No support for Air Time Fairness (AFT) feature in 188.8.131.52
Date entered: 29-Jul-2015
Summary: As stated in "software advisory" section on the Wireless LAN Controller software downloads page for version 184.108.40.206, Air Time Fairness(ATF) feature is not currently supported on this code train. This feature will be supported in our next 8.1 (MR2) release which will be coming soon.
Summary: New, out of the box 5520 and 8540 wireless LAN controllers may be missing AP images. APs will join, then loop attempting to download an image. Workaround: reinstall 8.1 AireOS using TFTP (not HTTP.) WLCs manufactured after 20-Jul-2015 do not have this problem.
Deferral of WLC code prior to 7.6/220.127.116.11/18.104.22.168
Date entered: 10-Jun-2014
Summary: All WLC code prior to AireOS 7.6/22.214.171.124/126.96.36.199 is in the process of being deferred, due to a Compact Flash driver problem that affects 5500s, WiSM2s and 2500s. The FUS image as well as the runtime image needs to be updated.
Summary: if the network path between an AP and its WLC delivers packets out of order - for example, if per-packet load balancing is in use - then an AP, after upgrading its image to 7.6 (15.2(4)JB branch), may be unable subsequently to rejoin the controller. The workaround is to downgrade the WLC to a pre-7.6 release, and also to manually downgrade the AP's IOS.
Summary: When AireOS 8.0 is released later in 2014, the following changes to TKIP support will be in effect:
WPA2-TKIP will no longer be allowed
WPA1-TKIP must always be used with WPA2-AES
Older WPA1-TKIP clients can still be supported on a WLAN advertising WPA1-TKIP + WPA2-AES
Maintenance releases of older branches and existing products are not required to remove TKIP support.
The policy change is per certification requirements from the Wi-Fi Alliance. The 8.0 Release Notes, when published, will contain more details.
7.6 MR2 Pre-release download is available
Date entered: 4-Apr-2014
Summary: a pre-release of 7.6 MR2 for the WLC is now available for download. This is a beta version of 7.6 MR2, with support for the 2700 series and 702W access points, and with critical bugfixes. The official release of 7.6 MR2 is expected on CCO in the May 2014 timeframe.
Summary: Apple iOS 7 clients may have problems accessing a guest portal (webauth) on a WLC. This will be fixed in the following CCO releases: 7.4 MR2 and 7.6 FCS, to appear on CCO in the late October - December 2013 timeframe. For customers who can't wait, 7.4 and 7.5 rebuilds are available now through TAC.
For more information, see:
CSCuj18674 captive portal/wispr support for apple ios7
Summary: The Chrome browser, when upgraded to version 29, may be unable to access the PI and WLC GUIs.
The problem is fixed in PI 2.0; patches are available for earlier versions. The problem affects the WLC running AireOS
7.5, and will be fixed in 7.6; a workaround is to configure "config network secureweb cipher-option rc4-preference enable"
For more information, see:
CSCui77571 PI: Chrome upgrade to Version 29.0.1547.57 m causes error
CSCui87814 Cannot open WLC GUI in Chrome-29 with 'https'
Flex7510 hang, crash
Date entered: 1-Oct-2013
Summary: Flex7510 controllers may hang, then crash, with a "!!!!! Watchdog detected LOCKUP !!!!!" message on the console. This problem is fixed in 188.8.131.52 and 7.5.
For more information, see:
CSCug08318 New 7500 M3 Hardware Version, unable to scale to 6000 APs
792x phones not supported with AP3600 11ac module
Date entered: 20-Aug-2013
Summary: The 792x phones are not supported with the AP3600 802.11ac module (AIR-RM3000AC). This is because the module does not support CCX or CCKM, and will disrupt CCKM roaming. Support for 792x phones on 3600s withthe RM3000AC is expected in the AireOS 7.6 release.
Summary: Some 1260 and 3500 series APs have a manufacturing DDR calibration issue, which can cause memory corruption. This is fixed in the 184.108.40.206, 220.127.116.11, and 18.104.22.168 WLC releases, and in the 15.2(2)JA aIOS release. For more information, see Calibration fix for 1260, 3500 series APs (CSCtu24972, CSCty68030).
Windows 8 client association problem
Date entered: 3-Oct-2012
Summary: Windows 8 clients can be unable to associate to a lightweight AP, if using AES. This is fixed
in the 22.214.171.124, 126.96.36.199, and 188.8.131.52 WLC releases. For more information, see CSCua29504.
WiSM2 problem with AP Images
Date entered: 21-June-2011
Summary: The software on some WiSM2 modules was incorrectly installed by manufacturing - the images for some or all APs may be missing. As as result, APs may be unable to join. The workaround is simply to reinstall the 184.108.40.206 software. See CSCtr41909.
NM-AIR-WLC6-K9 not supported beyond 4.2 software
Date entered: 4-May-2011
Summary: the NM-AIR-WLC6-K9 Wireless LAN Controller Module is not supported with any software beyond 220.127.116.11. Customers who attempt to upgrade these modules to the latest 6.0/7.0 software will find that the upgrade will fail, or that APs will be unable to join. See CSCto53822.