Cisco AIR-WLC2006-K9 - Wireless LAN Controller 2006 Guía de usuario Pagina 129

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5-9
Cisco Wireless LAN Solution Product Guide
OL-7955-01
Chapter 5 Configuring Wireless LANs
Configuring Wireless LANs
Note When access-point-controlled CAC is enabled, the access point sends out a Cisco proprietary
CAC Information Element (IE) and does not send out the standard QBSS IE.
Enter this command to enable 7920 support mode for phones that require client-controlled CAC:
config wlan 7920-support client-cac-limit {enabled | disabled} wlan-id
Note You cannot enable both WMM mode and client-controlled CAC mode on the same wireless
LAN.
Enter this command to enable 7920 support mode for phones that require access-point-controlled CAC:
config wlan 7920-support ap-cac-limit {enabled | disabled} wlan-id
Configuring Auto Anchoring
Use auto anchoring to improve load balancing and security for roaming clients on your wireless LANs.
Under normal roaming conditions, client devices join a wireless LAN and are anchored to the first
controller that they contact. If a client roams to a different subnet, the controller to which the client
roamed sets up a foreign session for the client with the anchor controller. However, using the auto-anchor
feature, you can specify a controller or set of controllers as the anchor points for clients on a wireless
LAN.
You can use auto anchoring to restrict a wireless LAN to a single subnet, regardless of a client’s entry
point into the network. Clients can then access a guest wireless LAN throughout an enterprise but still
be restricted to a specific subnet. Auto anchoring can also provide geographic load balancing because
the wireless LANs can represent a particular section of a building (such as engineering or marketing),
effectively creating a set of home controllers for a wireless LAN. Instead of being anchored on the first
controller that they happen to contact, mobile clients can be anchored on controllers that control access
points in a particular vicinity and to which the mobile clients normally associate.
Guidelines for Using Auto Anchoring
Keep these guidelines in mind when you configure auto anchoring:
You can configure multiple controllers as anchors for a wireless LAN.
You must disable a wireless LAN before configuring anchors for it.
Controllers must be added to the mobility member list before you can designate them as anchors for
a wireless LAN.
Auto anchoring supports web authorization but does not support other Layer 3 security types.
The wireless LANs on both the foreign controller and the anchor controller must be configured with
anchors. On the anchor controller, configure the anchor controller itself as a mobility anchor. On the
foreign controller, configure the anchor as a mobility anchor.
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