Cisco Cisco Access Registrar 4.2 Spécifications télécharger pdf (Page 111)

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Cisco Wireless LAN Controller Configuration Guide

OL-13826-01

Chapter 4 Configuring Controller SettingsWireless Device Access

Configuring 802.11n Parameters

• 13 (116 Mbps)

• 14 (130 Mbps)

• 15 (144 Mbps)

Any associated clients that support the selected rates may communicate with the access point using those

rates. However, the clients are not required to be able to use this rate in order to associate. The MCS

settings determine the number of spatial streams, the modulation, the coding rate, and the data rate values

that are used.

Step 4 Click Apply to commit your changes.

Step 5 To use the 802.11n data rates that you configured, you need to enable WMM on the WLAN. Follow these

steps to do so:

a. Click WLANs to open the WLANs page.

b. Click the name of the WLAN for which you want to configure WMM mode.

c. When the WLANs > Edit page appears, click the QoS tab to open the WLANs > Edit (Qos) page.

d. From the WMM Policy drop-down box, choose Required or Allowed to require or allow client

devices to use WMM. Devices that do not support WMM cannot join the WLAN.

Note In Layer 2 LWAPP mode when WMM is enabled on any WLAN, the access point sends its

priority information on the 802.1q PRI field, with VLAN ID 0 based on the WMM clients’

QoS control fields. In Layer 3 LWAPP mode, this information is carried in the DSCP of the

LWAPP packet’s IP header. Some non-Cisco access switches to which the access point is

connected might handle VLAN tag ID 0 inappropriately. For example, the switch might drop

packets that are tagged with VLAN ID 0, causing the access point with WMM enabled to be

unable to join the controller in Layer 2 LWAPP mode and to reboot repeatedly. Therefore,

when the controller is in Layer 2 mode and WMM is enabled, you must put the access points

on the trunk port of the switch to enable them to join the controller. If the access point is

unable to join the controller after connecting to the trunk port of the switch, you must use

the controller in Layer 3 LWAPP mode in order to use WMM.

e. Click Apply to commit your changes.

Step 6 Click Save Configuration to save your changes.

Note To determine if an access point supports 802.11n, look at the 11n Supported field on either the

802.11a/n (or 802.11b/g/n) Cisco APs > Configure page or the 802.11a/n (or 802.11b/g/n) AP

Interfaces > Details page.

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Cisco Cisco Access Registrar 4.2 Spécifications Page 111

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