topic Re: How can you get AP's to try DFS channels? in Aerohive Migrated Content

How can you get AP's to try DFS channels?

jwade2 — Tue, 13 Aug 2019 02:24:50 GMT

We have a complicated building with lots of overlap between AP's and would like to have the AP's try DFS channels to prevent interference. (There just aren't enough channels without DFS) We have "Dynamic Frequency Selection configured on the 5Ghz Radios, but the AP's have never chosen a DFS channel. Is there anyway to kick it to make it switch? We are uisng 630's and 650's

Re: How can you get AP's to try DFS channels?

samantha_lynn — Tue, 13 Aug 2019 04:00:14 GMT

You can set the channel manually in the device specific settings, but other than a full reboot of the device, if the device is set to auto channel selection, there isn't a way to ask it to choose a different one. If an emergency signal needs one of those DFS channels, it will move the AP to a different channel, just something to keep in mind.

Re: How can you get AP's to try DFS channels?

jwade2 — Tue, 13 Aug 2019 04:24:23 GMT

Thanks for the reply. Interestingly, the AP will not even let you set the DFS Channels manually. (It only shows the non-DFS channels and "Auto". ) Must be missing something or maybe this requires a reboot of the AP. Still waiting on Aerohive support to answer this.

Re: How can you get AP's to try DFS channels?

jwade2 — Tue, 13 Aug 2019 06:37:37 GMT

Hmm, I ssh'd into the AP and saw that even though DFS was enabled in hive manager, it was disabled on the radio profile on the AP. I made a change to the DFS setting "Enable manual channel selection return" and uploaded the Network policy and amazingly DFS switched to enabled. Still can't set the channel manually to a DFS channel via hivemanager, but I was able to set it via the console, and other AP's we pushed the policy to selected DFS channels after the radio reboot that occurred from the policy change.

I think my problem is solved, now we will have to see if any of the DFS channels are in use in the area by radars or emergency services. Hopefully we won't get kicked off, because without them, I have massive interference problems.

Re: How can you get AP's to try DFS channels?

ashley_finch — Tue, 13 Aug 2019 15:05:14 GMT

You should still be able to set DFS channels manually through the interface settings of an AP in HiveManager. Are the APs using the correct radio profile?

Re: How can you get AP's to try DFS channels?

jwade2 — Tue, 13 Aug 2019 23:55:24 GMT

Hmm, AP's are using the correct device template and Radio Profile and this is confirmed via the command line, however this this is what I see in the GUI, (Non-DFS Channels only)

But, like I said, I can set the channel to a DFS channel via the CLI and the AP's are picking DFS channels, so it is not a problem. . Maybe this is all fixed in the 19.5.1.7 release 🙂

Re: How can you get AP's to try DFS channels?

jwade2 — Tue, 13 Aug 2019 23:57:18 GMT

Hmm, let me paste a picture, but stripped it out. For reference the image was the Wifi 1 interface configuration for an AP and the screenshot showed the channel selection pull down menu with "Auto" and the 8 non-DFS 5Ghz channels.

Re: How can you get AP's to try DFS channels?

samantha_lynn — Wed, 14 Aug 2019 00:43:35 GMT

You can set DFS channels statically, and you should only need to enable the DFS channels in the Radio profile to see them in the drop down list. You might need to upgrade to the latest version of HiveManager to do this.