Примечания к выпуску для Cisco Cisco 4402 Wireless LAN Controller
R E V I E W D R A F T — C I S C O C O N F I D E N T I A L
12
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 3.2.210.0
OL-xxxxx-xx
Important Notes
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config wlan disable wlan_id_number
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config wlan 7920-support ap-cac-limit enable wlan_id_number
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config wlan enable wlan_id_number
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sh wlan wlan_id_number
Note
Use this command to verify that the WLAN is enabled and the Dot11-Phone Mode
(7920) field is configured for compat mode.
(7920) field is configured for compat mode.
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save config
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The Dynamic Transmit Power Control (DTPC) information element (IE) must be enabled using the
config 802.11a dtpc enable command. The DTPC IE is a beacon and probe information element
that allows the access point to broadcast information on its transmit power. The Cisco 7920 Wireless
IP Phone uses this information to automatically adjust its transmit power to the same level as the
access point to which it is associated. In this manner, both devices are transmitting at the same level.
config 802.11a dtpc enable command. The DTPC IE is a beacon and probe information element
that allows the access point to broadcast information on its transmit power. The Cisco 7920 Wireless
IP Phone uses this information to automatically adjust its transmit power to the same level as the
access point to which it is associated. In this manner, both devices are transmitting at the same level.
•
The 7920 phones and the controllers do not currently use compatible fast roaming mechanisms. The
phone uses CCKM while the controllers use proactive key caching (PKC). To minimize roaming
latency, static WEP is the recommended security mechanism.
phone uses CCKM while the controllers use proactive key caching (PKC). To minimize roaming
latency, static WEP is the recommended security mechanism.
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When configuring WEP, there is a difference in nomenclature for the controller and the 7920 phone.
Configure the controller for 104 bits when using 128-bit WEP for the 7920.
Configure the controller for 104 bits when using 128-bit WEP for the 7920.
Client Channel Changes
Cisco access points are known to go off channel for up to 30 seconds while identifying rogue access
point threats. This activity can cause occasional dropped client connections.
point threats. This activity can cause occasional dropped client connections.
Exclusion List (Blacklist) Client Feature
If a client is not able to connect to an access point and the security policy for the WLAN and/or client is
correct, the client has probably been disabled. In the controller GUI, you can view the client’s status on
the Monitor > Summary page under Client Summary. If the client is disabled, click Remove to clear the
disabled state for that client. The client automatically comes back and, if necessary, reattempts
authentication.
correct, the client has probably been disabled. In the controller GUI, you can view the client’s status on
the Monitor > Summary page under Client Summary. If the client is disabled, click Remove to clear the
disabled state for that client. The client automatically comes back and, if necessary, reattempts
authentication.
Automatic disabling happens as a result of too many failed authentications. Clients disabled due to failed
authorization do not appear on the permanent disable display. This display is only for those MACs that
are set as permanently disabled by the administrator.
authorization do not appear on the permanent disable display. This display is only for those MACs that
are set as permanently disabled by the administrator.
Maximum MAC Filter Entries
The controller database can contain up to 2048 MAC filter entries for local netusers. The default value
is 512. To support up to 2048 entries, you must enter this command in the controller CLI:
is 512. To support up to 2048 entries, you must enter this command in the controller CLI:
config database size MAC_filter_entry
where MAC_filter_entry is a value from 512 to 2048.