Amplify HD occupies two 2.4 GHz channel bands
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I have three Amplifi HD router/access points. One acts as a router, located on one floor, and the other two are located on other floors and connected to the router by Ethernet cables (Ethernet backhaul).
I have several good neighbors, all with their own wifi routers, so the 2.4 GHz is quite congested. I also have a Sonos system that needs to be relatively undisturbed, so I’m trying to control which 2.4 GHz channels are being used.
I’ve set up Amplifi HD to use channel 11 with 20 MHz bandwidth. However, I’m noticing (using a wifi analyzer) that Amplifi also occupies channel 1.
Why? Is there anything I can do to make it use only channel 11?
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@tom-nestli
Hi Tom,
just a quick question: is the channel 1 somehow showing as a hidden network?
Thanks
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It's for backhaul if you are connecting Mesh points to it.
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Hi @edward-dolezal - @Tom-Nestli indicated he was using Ethernet backhaul, so no wireless backhaul is involved, or should at least be disabled
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@derek-saville I believe it's a hard coded features set incase that you use it or like most WiFi I've seen is channel bonding for higher throughput.
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Hi @edward-dolezal - interesting...since AmpliFi does NOT have dedicated wireless backhaul links (radios or antennas), I would have expected the wireless backhauls to be completely disabled when Ethernet Backbone is enabled
And only if the Ethernet backhaul goes offline would the wireless backhaul then turn back on and reestablish a link
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@derek-saville its the same for most units the channel bonding not extra ssids though, hence why 80mhz 5ghz uses 4 channels or 3 if I remember correctly.
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Like this? I have Ethernet backhaul to and only three individual mesh HD routers.
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Hi @edward-dolezal - sorry I thought you were still referring to backhaul
@Tom-Nestli indicated he setup for a 20MHz channel width, so no bonding should take place
The non-overlapping 2.4GHz channels are 1, 4 & 11
So 20MHz on channel 11 with Ethernet backhaul should not create activity on channel 1 unless there is a bug or something else going on
@UBNT-Brett - any insight?
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@derek-saville actually If I remember correctly you are right I think it only bonds at 40mhz which doesn't even work on 2.4 which sucks.
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Hi @edward-dolezal - I believe you and @Dmitrijs-Ivanovs has a discussion on this back at v2.8.0RC4 and he said they gave up the 40MHz bonding
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@derek-saville the gave up on pushing devices to 40mhz which makes me sad since I still have devices that use that band that would benefit form it.
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@michaele Meshpoint may use other channel. Currently meshpoint channels are not configurable from UI. They select channels automatically based off of scan on startup.
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Hi @ubnt-brett - even when Ethernet backhaul is enabled?
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@derek-saville No, this is in regards to wireless meshpoints after you change their channel manually. Are you seeing this on an ethernet backhaul device?
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Hi @ubnt-brett - yes, @tom-nestli in the first post reported he is still seeing AmpliFi occupy channel 1 even though he has Ethernet backhaul enabled and manually set channel 11
That is the main focus of this thread!
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@ubnt-brett out of curiosity will we be able to change Mesh point channels one day in a future update possibly?
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@ubnt-brett said:
They select channels automatically based off of scan on startup.
Hi @UBNT-Brett - recently in iphones not staying connected it was reported by AmpliFi that:
No you need to perform the factory reset to trigger a new scan.
Can you clarify if channel scans are performed and selected on every reboot?
Or only at the initial setup / after a factory reset?
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@ubnt-brett I have only 3 Mesh Routers and the two "points" are configured with Ethernet backhaul. I have no "physical meshpoints" and no meshrouters connected wirelessly.
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@derek-saville I believe it's on Start up last time I checked the unit, it could have changed since then.
