Release Notes
39
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Caveats
• CSCsu07730—When you try to configure a network address for the AP-manager on a 4400 series
controller, an “Invalid IP” error message sometimes appears.
Workaround: None.
• CSCsu11528—The 4400 series controllers might drop very large (usually greater than 6000 bytes)
UDP and ping frames sourced from a wired node on the Ethernet and originating at 1-Gbps line rate.
Workaround: Drop the line rate to 100 Mbps, decrease the size of UDP or ICMP frames, or use a
different brand of wired client card.
• CSCsu12458—When a number of web-authentication users join the wireless network, the
sshpmMainTask might spike above 90% on a 2106 controller running software release 4.2.130.0.
Once sshpmMainTask spikes, the access points begin to drop off the controller, and access to the
controller becomes very sluggish.
Workaround: Disable web authentication or web pass-through for the WLAN.
• CSCsu37449—All of the access points joined to a controller running software release 4.2.112.0
might reboot at the same time.
Workaround: None.
• CSCsu40636—The access point sometimes violates the CTS duration when receiving a U-APSD
trigger frame. Instead of waiting for a few milliseconds to protect an upcoming link exchange, it
simply transmits the trigger frame.
Workaround: None.
• CSCsu40720—The following message might appear on the controller console without further
explanation:
Thu Sep 4 20:58:24 2008: mmMfpRequestedState: *** FIXME: Need to update BSSID state
distributed to APs for 00:1E:4A:E0:00:A0 radio 1
Workaround: None.
• CSCsu41774—All workgroup bridges (WGBs) joined to one controller might suddenly disconnect
from the external network. However, when a WGB moves to a second controller, it regains
connectivity.
Workaround: None.
• CSCsu44516—A 4404 controller running software release 4.0.179.8 and connected to a Catalyst
3750 stack might sometimes show wireless clients stuck in the DHCP_REQD state and unable to
pass traffic. This issue seems to occur for RF hand-held scanners.
Workaround: Reset the controller to purge the client associations.
• CSCsu44722—The following invalid error message appears when you enable IPv6 for a
mobility-anchor-enabled WLAN: “Cannot enable IPv6-bridging when DHCP Address Assignment
is enabled for WLAN.”
Workaround: None.
• CSCsu47888—The crash file or controller console should show whether a core dump was generated
following a crash and successfully uploaded to a TFTP server.
Workaround: None.
• CSCsu50080—When you enable web authentication pass-through with email input selected, the
controller allows any text to be entered rather than verifying that the email address has been entered
in a valid address format.
Workaround: None.