Dell 6.2 Channe l Switch Ann ouncemen t (CSA)

436| AccessPoints ( APs) DellPowerConnect W- Series ArubaOS 6.2 | User Guide
The RegulatoryD omain’s country code determines which channelsare selected in the Valid 802.11g channel,
Valid80 2.11a channel,Valid 802.11g 40MHz channel pair and Valid 802.11a 40MHz chann el pair fields.I f
none of the channelssupported by the AP have received regulatory approvalby t heco untrywhose country code
you selected, the AP will revert to Air Monit or mode.
6. Click A pply.
7. U nderthe Profiles list, expand the RF Managementmenu.
8. Select the 802 .11a radio profileused by the AP group
9. E nter 36 in the Channel text field and selectt he Above radio button. In this instance, channel 36 becomes the
primaryc hanneland the secondary channel is 40.
10. Click Apply.
11. Underthe Profiles list select the 802.11g r adiopro fileusedby the AP group.
12. Enter 1in the Channel text field and select the None radio button. In this instance, channel1 is the assigned 20
MHz channeland 40 MHz mode is disabled and click Apply.
Using the CLI
Country codes aregenerally specified in ISO 3166 format. To see what channels are available fora gi vencountry
code, use the show ap allowed-channels<country-code> command canbe 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
NOTE:Country codes are generally specified in ISO 3166 format. To see what channels are available for a given country code, use
theshow ap all owed-channels country-code<country-code> command.
Channe l Switch Ann ouncemen t (CSA)
Whenan AP changes its channel, anexist ing wireless clients may “time out” while waiti ngt o receive a new beacon
fromt heA P; the client must beginscanning to disc overt henew channel on which the AP is operating. If the
disruption is long enough,the client may need to reassociate, reauthenticate, and re-requestan IP address. Channel
Switch Announcement(CSA), as defined by IEEE 802.11 h,enables an AP to announce that it is switching to a new
channelbefore it begins transmitting on that channel.This allows the clients, who support CSA,t o transition to the
new channelwith minimal downtime.
WhenCSA is enabled,the AP does not change to a new channelimmediately. Instead, it sends a number of beacons
(the defaultis 4 ) which contain the CSA announcementbefore it swit chest o the new channel.You can configure
the numberof announcements sent before the change.
NOTE:Cl ients mustsupport CSA in order to track the channel change without experiencing disruption.
Using the WebUI
1. N avigate to the Configuration > Wireless > AP Configuration page.
2. Select either the AP Group or AP Specific tab.Click Edit for the AP group orA P name.
3. Select RF Managementi n the Profile list.
4. Select t he 802.11a or 802.11g radio profile.
5. Select E nableCSA. You c an configurea different value for CSA Count.