Cisco Cisco 2106 Wireless LAN Controller
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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.61.0
OL-31336-01
Important Notes
Multicast Limitations
Multicast applications have known performance limitations on the 2000 series controllers, 2100 series
controllers, and the Cisco Wireless LAN Controller Network Module for Cisco Integrated Services
Routers. Cisco is working to address these limitations in a future production code release. In the
meantime, Cisco recommends that you use the 4400 series or WiSM controllers for multicast intensive
applications.
controllers, and the Cisco Wireless LAN Controller Network Module for Cisco Integrated Services
Routers. Cisco is working to address these limitations in a future production code release. In the
meantime, Cisco recommends that you use the 4400 series or WiSM controllers for multicast intensive
applications.
Note
Multicast is not supported on access points that are connected directly to the local port of a 2000 or 2100
series controller.
series controller.
MAC Filtering for WGB Wired Clients
Controller software release 4.1.178.0 or later enables you to configure a MAC-filtering IP address for a
workgroup bridge (WGB) wired client to allow passive WGB wired clients, such as terminal servers or
printers with static IP addresses, to be added and remain in the controller’s client table while the WGB
is associated to a controller in the mobility group. This feature, activated by the config macfilter
ipaddress MAC_address IP_address CLI command, can be used with any passive device that does not
initiate any traffic but waits for another device to start communication.
workgroup bridge (WGB) wired client to allow passive WGB wired clients, such as terminal servers or
printers with static IP addresses, to be added and remain in the controller’s client table while the WGB
is associated to a controller in the mobility group. This feature, activated by the config macfilter
ipaddress MAC_address IP_address CLI command, can be used with any passive device that does not
initiate any traffic but waits for another device to start communication.
This feature allows the controller to learn the IP address of a passive WGB wired client when the WGB
sends an IAPP message to the controller that contains only the WGB wired client’s MAC address. Upon
receiving this message from the WGB, the controller checks the local MAC filter list (or the anchor
controller’s MAC filter list if the WGB has roamed) for the client’s MAC address. If an entry is found
and it contains an IP address for the client, the controller adds the client to the controller’s client table.
sends an IAPP message to the controller that contains only the WGB wired client’s MAC address. Upon
receiving this message from the WGB, the controller checks the local MAC filter list (or the anchor
controller’s MAC filter list if the WGB has roamed) for the client’s MAC address. If an entry is found
and it contains an IP address for the client, the controller adds the client to the controller’s client table.
Note
Unlike the existing MAC filtering feature for wireless clients, you are not required to enable MAC
filtering on the WLAN for WGB wired clients.
filtering on the WLAN for WGB wired clients.
Note
WGB wired clients using MAC filtering do not need to obtain an IP address through DHCP to be added
to the controller’s client table.
to the controller’s client table.
CKIP Not Supported with Dynamic WEP
In controller software release 4.1.185.0 or later, CKIP is supported for use only with static WEP. It is not
supported for use with dynamic WEP. Therefore, a wireless client that is configured to use CKIP with
dynamic WEP is unable to associate to a wireless LAN that is configured for CKIP. Cisco recommends
that you use either dynamic WEP without CKIP (which is less secure) or WPA/WPA2 with TKIP or AES
(which are more secure).
supported for use with dynamic WEP. Therefore, a wireless client that is configured to use CKIP with
dynamic WEP is unable to associate to a wireless LAN that is configured for CKIP. Cisco recommends
that you use either dynamic WEP without CKIP (which is less secure) or WPA/WPA2 with TKIP or AES
(which are more secure).