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Use fix 5GHz RF channels for AP7131 Wing 5.4

Use fix 5GHz RF channels for AP7131 Wing 5.4

Stéphane_NOBLET
New Contributor

‎10-13-2017 07:42 AM

Dear,
I'm using three Wifi AP7131 for a wifi load balancing application.
I use the 5GHz band and want to use a fixed channel for each one :
- 100
- 108
- 116
I disabled the DFS (Dynamic Frequency Selection), and disabled the Smart RF.
When i apply this configuration, at startup the radio on each AP are in "Radar scan" state, and they get anothers channels, like 36, 48 etc.
Is it possible to force theses RF to the mentionned channels ?
Thank
9 REPLIES 9

Rich_Upshaw
New Contributor II

‎10-13-2017 01:46 PM

Channels 100, 108 and 116 are DFS channels. So, it sounds like you need to use non-dfs channels which are 36-48 and 149-161. Change to one of those channels and you won't get the "radar scanning" message anymore.
0 Kudos

Stéphane_NOBLET
New Contributor

‎10-13-2017 10:44 AM

Thank you for replies,
I'm in France, using AP indoor.
I thought it was possible to disable DFS.
I didn't found any upgrade firmware on this hardware.
0 Kudos

Andrew_Webster
New Contributor III

‎10-13-2017 10:05 AM

More specifically, the implementation of DFS requires that the radios go through a listening phase before enabling their transmitters to ensure there are no radar pulses present. This is called the "Radar Scan".
There is no workaround for this, as it is required by the radio frequency management authorities of the respective countries (eg: FCC is USA, IC in Canada, etc).
0 Kudos

Timo1
New Contributor II

‎10-13-2017 08:31 AM

Do you use the AP indoor or outdoor? In what country you try to use it.

If you hit a radar (for this channels very unusual), you can see it in the event-history.

I'll also suggest to update to the latest firmware version. I know there was a lot of DFS problems with old firmware versions.
0 Kudos

Sam
Extreme Employee

‎10-13-2017 07:55 AM

Hi,

It sounds like your operating the radios in an area where there is 5GHz radar or satellite being detected. In which case DFS (dynamic frequency selection) will move the radios onto a channel that does not fall under the DFS requirements (channels 36, 40, 44 or 48) as per the 802.11h standard.

I would suggest at looking for an alternative channel plan should these radar/satellite detection occur on a regular basis.

Hope this helps,

- Sam

0 Kudos
GTM-P2G8KFN