Cisco Cisco 2106 Wireless LAN Controller
16
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.1.171.0
OL-12979-01
Important Notes
CKIP Not Supported with Dynamic WEP
In controller software release 4.1.171.0, 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).
UNII-2 Channels Disabled on New 1000 Series Access Points for United States,
Canada, and Philippines
Canada, and Philippines
New Cisco 1000 series lightweight access points for the United States, Canada, and the Philippines do
not support the UNII-2 band (5.25 to 5.35 GHz). These models are labeled AP10x0-B, where “B”
represents a new regulatory domain that replaces the previous “A” domain.
not support the UNII-2 band (5.25 to 5.35 GHz). These models are labeled AP10x0-B, where “B”
represents a new regulatory domain that replaces the previous “A” domain.
FCC DFS Support on AP1130s
Federal Communications Commission (FCC) dynamic frequency selection (DFS) is supported only on
AP1130s in the United States, Canada, and the Philippines that have a new FCC ID. Access points use
DFS to detect radar signals such as military and weather sources and then switch channels to avoid
interfering with them. AP1130s with FCC DFS support have an FCC ID “LDK102054E” sticker.
AP1130s without FCC DFS support have an “LDK102054” (no “E” suffix) sticker. AP1130s that are
operating in the United States, Canada, or the Philippines; have an FCC ID “E” sticker; and are running
the 4.1.171.0 software release can use channels 100 through 140 in the UNII-2 band.
AP1130s in the United States, Canada, and the Philippines that have a new FCC ID. Access points use
DFS to detect radar signals such as military and weather sources and then switch channels to avoid
interfering with them. AP1130s with FCC DFS support have an FCC ID “LDK102054E” sticker.
AP1130s without FCC DFS support have an “LDK102054” (no “E” suffix) sticker. AP1130s that are
operating in the United States, Canada, or the Philippines; have an FCC ID “E” sticker; and are running
the 4.1.171.0 software release can use channels 100 through 140 in the UNII-2 band.
Pings Supported on the Controller
Controller software release 4.1.171.0 is designed to support ICMP pings to the management interface
either from a wireless client or a wired host. ICMP pings to other interfaces configured on the controller
are not supported.
either from a wireless client or a wired host. ICMP pings to other interfaces configured on the controller
are not supported.
Access Point Radios Are Not Enabled After Upgrading to 4.1.171.0
After you upgrade the controller in the Catalyst 3750G Wireless LAN Controller Switch to software
release 4.1.171.0, the access point radios are not enabled. This issue occurs because the switch is not
correctly recognizing the access points. To work around this issue, uncheck the CDP State check box
on the AP Configuration > CDP Template page.
release 4.1.171.0, the access point radios are not enabled. This issue occurs because the switch is not
correctly recognizing the access points. To work around this issue, uncheck the CDP State check box
on the AP Configuration > CDP Template page.
Setting the Retransmit Timeout Value for TACACS+ Servers
Cisco recommends that the retransmit timeout value for TACACS+ authentication, authorization, and
accounting servers be increased if you experience repeated reauthentication attempts or the controller
falls back to the backup server when the primary server is active and reachable. The default retransmit
timeout value is 2 seconds and can be increased to a maximum of 30 seconds.
accounting servers be increased if you experience repeated reauthentication attempts or the controller
falls back to the backup server when the primary server is active and reachable. The default retransmit
timeout value is 2 seconds and can be increased to a maximum of 30 seconds.