Users Guide

567| Access Points Dell Networking W-Series ArubaOS 6.5.x| User Guide
6. In the Valid 802.11a 80MHz channel group field, define which 80MHz channels on the 802.11a band
are available for assignment by ARM and for the controller to randomly assign if user has not specified a
channel. The channel numbers below correspond to channel center frequency.
l Possible choices in US: 42, 58, 106, 122, 138, 155
l Possible choices in EU: 42, 58, 106, 122
l Possible choices in JP: 42, 58, 106, 122
l Possible global choices: 42, 58, 106, 122, 138, 155
7. Click Apply.
8. Under the Profiles list, expand the RF Management menu.
9. Select the 802.11a radio profile used by the AP group
10.Enter 36 in the Channel text field and select the Above radio button. In this instance, channel 36 becomes
the primary channel and the secondary channel is 40.
11.Click Apply.
12.Under the Profiles list select the 802.11g radio profile used by the AP group.
13.Enter 1 in the Channel text field and select None. In this instance, channel 1 is the assigned 20 MHz
channel and 40 MHz mode is disabled.
14.Click Apply.
Using the CLI
Country codes are generally specified in ISO 3166 format. To see what channels are available for a given
country code, use the show ap allowed-channels <country-code> command can be used.
ap regulatory-domain-profile default
country-code US
rf dot11a-radio-profile ht-corpnet-a
channel 36+
rf dot11g-radio-profile ht-corpnet-g
channel 1
Country codes are generally specified in ISO 3166 format. To see what channels are available for a given country
code, use the show ap allowed-channels country-code <country-code> command.
Channel Switch Announcement (CSA)
When an AP changes its channel, an existing wireless clients may “time out” while waiting to receive a new
beacon from the AP; the client must begin scanning to discover the new channel on which the AP is operating.
If the disruption is long enough, the client may need to reassociate, reauthenticate, and request an IP address.
Channel Switch Announcement (CSA), as defined by IEEE 802.11h, enables an AP to announce that it is
switching to a new channel before it begins transmitting on that channel. This allows the clients, who support
CSA, to transition to the new channel with minimal downtime.
When CSA is enabled, the AP does not change to a new channel immediately. Instead, it sends a number of
beacons (the default is 4) which contain the CSA announcement before it switches to the new channel. You can
configure the number of announcements sent before the change.
Clients must support CSA in order to track the channel change without experiencing disruption.
Using the WebUI
1. Navigate to the Configuration > Wireless > AP Configuration page.
2. Select either the AP Group or AP Specific tab. Click Edit for the AP group or AP name.