Cisco Cisco 2106 Wireless LAN Controller
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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.176.0
OL-31336-01
Caveats
•
CSCsu52812—When the controller is in multicast-unicast mode, it sends unicast traffic to an access
point before that access point has fully joined the controller. This behavior can be a serious problem
when the access point is running a recovery image like 12.3(11)JX1, which does not drop LWAPP
data packets. If the number of data packets sent to the access point before it receives the full image
is large enough, the access point locks up and cannot join the controller.
point before that access point has fully joined the controller. This behavior can be a serious problem
when the access point is running a recovery image like 12.3(11)JX1, which does not drop LWAPP
data packets. If the number of data packets sent to the access point before it receives the full image
is large enough, the access point locks up and cannot join the controller.
Workaround: To resolve access point join issues, follow these steps:
a.
Load recovery image 12.4(10b)JA3 on the access point.
b.
Load the full LWAPP image on the access point.
c.
Disable multicast-unicast on the controller.
If the multicast mode multicast is supported, change the multicast mode to multicast, or disable
multicast.
multicast.
•
CSCsu52837—Preauthenticated clients cannot reach web-authenticated clients on the same WLAN.
Workaround: None.
•
CSCsu62060—A 4400 series controller might reboot due to a software failure of the
tplusTransportThread.
tplusTransportThread.
Workaround: None.
•
CSCsu67530—When more than six controllers are in a mobility group, client mobility can become
sporadic.
sporadic.
Workaround: None.
•
CSCsu72717—The name is corrupted in the interrupt session of the Cisco WiSM controller’s crash
file.
file.
Workaround: None.
•
CSCsu74008—On a Catalyst 3750G Integrated Wireless LAN Controller Switch running controller
software release 5.1.151.0, the results of ipRouteIfIndex for some routes point to an interface with
index “5.” However, the results of IfIndex show only three interfaces with their corresponding
indexes.
software release 5.1.151.0, the results of ipRouteIfIndex for some routes point to an interface with
index “5.” However, the results of IfIndex show only three interfaces with their corresponding
indexes.
Workaround: None.
•
CSCsu74487—Cisco 1131 access points attached to a controller running software release 4.2.130.0
might reboot unexpectedly. If you collect the core dumps to analyze the reason for the reboot, the
core dump files produced are 0 bytes in size.
might reboot unexpectedly. If you collect the core dumps to analyze the reason for the reboot, the
core dump files produced are 0 bytes in size.
Workaround: None.
•
CSCsu76295—If you try to manage a controller without web authentication by configuring the
pre-authentication ACL to allow traffic in both directions, you cannot reach the management
interface. You can access the management interface only after web authentication.
pre-authentication ACL to allow traffic in both directions, you cannot reach the management
interface. You can access the management interface only after web authentication.
Workaround: None.
•
CSCsu80604—The memory monitor configuration returns to default values after the controller
reboots.
reboots.
Workaround: None.
•
CSCsu81856—A 4402 controller running software release 4.2.130.0 and configured with an internal
DHCP server might sometimes exhibit DHCP leases for addresses that are statically assigned to
various wireless clients.
DHCP server might sometimes exhibit DHCP leases for addresses that are statically assigned to
various wireless clients.
Workaround: None.