Release Notes

37
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Caveats
• CSCsr44439—The web authentication page does not load on the browser when the client connects
through a wired guest VLAN on a controller running software release 4.2.130.0.
Workaround: None.
• CSCsr45163—When IPv6 clients move from an access point group or VLAN to a new access point
group or VLAN, they lose connectivity because all traffic is forwarded to the old VLAN.
Workaround: Configure the clients with a static IPv6 address.
• CSCsr51667—When you click the Refresh button for the message logs on a controller running
software release 4.2.130.0, the controller generates a “Connection interrupted/Page load” error, and
the following message appears in the message log: “EMWEB-1-BUFFER_TOO_MANY: Received
too many Http buffers from a session. BufCount(xx) > Max (xx), BufLen= 16607. Aborting
session.”
Workaround: Use the controller CLI or navigate to the Message Logs page on the controller GUI.
• CSCsr53764—When workgroup bridges (WGBs) are installed on a train and clients joined to the
WGBs are running some type of application, the WGBs roam very quickly between access points,
and some wired clients might become stuck at a specific access point.
Workaround: Reset the WGBs, enter the clear bridge command on the WGBs, or wait for the WGBs
to roam back to the access point where the client is stuck.
• CSCsr55953—The controller might drop traffic to the CPU and log the following message:
“NP3400_interrupt.c:3766 Could not enqueue pkt_type 6 (proto 0x0000, len 108), return -12.( 6
suppressed msgs).”
Workaround: None.
• CSCsr58532—The following error message might appear on 2106 controllers: “sim_config.c:194
SIM-3-INTFGET_GIG_ETH_FAIL: Failed to get the interface number of the Gigabit Ethernet
Port.”
Workaround: None.
• CSCsr63100—The controller’s message log sometimes fills with “sysapi.c:160
SYSTEM-3-SYSAPI_ERR” messages after dump-low-level debugs are run.
Workaround: None.
• CSCsr63356—When a multicast application is in use, the multicast stream does not get the proper
802.1p QoS marking.
Workaround: None.
• CSCsr70862—A Cisco WiSM controller running software release 4.2.130.0 might reboot due to a
software failure of the instruction located at 0x1038a140(ewsInternalAbort+348).
Workaround: Set the session timeout to zero or remove Telnet access.
• CSCsr71245—A 4400 series controller without an embedded syslog manager (ESM) might reboot
if you enable or disable encryption on the controller using WCS.
Workaround: None.
• CSCsr72091—The radio resource management (RRM) feature in controller software release
4.2.130.0 is not providing consistent results from coverage hole events and channel assignments.
Workaround: None.
• CSCsr75350—When a 1230 series access point is joined to a 4404 controller, the 2.4-GHz channel
that the access point is on differs between the controller and the access point.
Workaround: None.