Release Notes

33
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Caveats
Workaround: None.
• CSCsm95478—HT protection bits might incorrectly report the operating mode.
Workaround: None.
• CSCsm96105—The controller does not pass traffic to a client device with a MAC address beginning
with 00:00:00:00. This issue occurs with both WGB and wireless clients.
Workaround: None.
• CSCsm98659—The clcCdpGlobalEnable SNMP variable cannot be set on the controller unless
there is at least one access point present on the controller. This creates problems when trying to add
a new controller to WCS. When you create a new controller template on WCS and set the Global
CDP on APs value to false, the template cannot be pushed out to any controller that does not have
an access point associated to it.
Workaround: Add an access point to the controller. Then you can add the controller to WCS or
change the CDP parameter.
• CSCso02340—The controller might report a different power level than is actually used by the access
point if you change the channel from one supporting one transmit power to another supporting a
different transmit power.
Workaround: Reapply the power configuration.
• CSCso02467—When logging into a lobby ambassador account, you are able to create permanent
guest user accounts by setting all parameters to “0.” After logging back into the account, you can
verify that these permanent accounts were created under Security > Local Net Users.
Workaround: None.
• CSCso04989—The controller does not acknowledge video and voice streams from the client for
about 60 ms. This problem occurs when WMM is used with Intel 4965 clients on Windows Vista.
Workaround: None.
• CSCso07457—When the controller downloads a file using FTP, WCS shows the previous transfer
state as the intermediate state, which is different from the final transfer state.
Workaround: None.
• CSCso31067—Some clients might experience failures during upstream-only prioritized traffic on
802.11a, despite radio resource management (RRM) features being disabled.
Workaround: None.
• CSCso31640—When you downgrade a 2100 series controller from software release 5.1 to software
release 4.2.112.0, any hybrid-REAP groups configured on the controller are lost after the
downgrade.
Workaround: None. You must reconfigure the hybrid-REAP groups.
• CSCso47897—The MAC address table on the switch might show an invalid MAC address coming
from the interfaces attached to the controllers.
Workaround: None.
• CSCso60597—If a 1250 series access point is configured for 20-MHz channel width and is then
placed into sniffer mode, you cannot change the channel width to Above 40 MHz or Below 40 MHz.
If the access point is configured for Above 40 MHz or Below 40 MHz before it is placed into sniffer
mode, you can change the channel width to 20 MHz but not to a 40-MHz setting.
Workaround: Return the access point to local mode in order to modify the channel width settings.
Then return it to sniffer mode. This process requires a minimum of two reboots of the access point.