Adding a 5GHz VAP forces wireless channel to 100 (5500Mhz)

Post new topic   Reply to topic    DD-WRT Forum Index -> Atheros WiSOC based Hardware
Goto page 1, 2  Next
Author Message
_trey
DD-WRT Novice


Joined: 28 Jan 2021
Posts: 5

PostPosted: Thu Jun 16, 2022 19:27    Post subject: Adding a 5GHz VAP forces wireless channel to 100 (5500Mhz) Reply with quote
I have a R7800 currently running r49197.

As soon as I add a VAP to the 5GHz radio, it forces the wireless channel to 100 (5500MHz). Settings for the physical interface wlan0 still show my previously selected channel, but the wireless status page and connected clients all show that the radio is running on channel 100.

I can consistently reproduce this on builds from last fall through the 6/16/2022 build.

Anyone else experience this issue?

Steps to reproduce:

1. Start with a clean install (nvram erase && reboot) ... maybe not necessary, but keeps things consistent.

2. In wireless settings, set wlan0 to:

Network mode: mixed
Channel width: VHT80
Channel: 60
Extension channel: LU (-2)

3. Apply, reboot. Notice that wireless status page reports that the radio is running on channels 60 + 58 as expected.

4. From wireless settings page, Add a Virtual AP to wlan0.

5. Save, apply, reboot.

6. Check wireless settings page and notice that channel is still set as it was previously (60 w/ Extension LU -2).

7. Check the wireless status page and notice that the reported wireless channel for both wlan0 and wlan0.1 is listed as running at 100 + 106. Connected clients also now report the channel as 100.

Channel 100 is crowded in my area, so I'd like to be able to use a different channel. An insights or workarounds are very appreciated.
Sponsor
the-joker
DD-WRT Developer/Maintainer


Joined: 31 Jul 2021
Posts: 2146
Location: All over YOUR webs

PostPosted: Thu Jun 16, 2022 19:46    Post subject: Reply with quote
dont use upper upper use lower lower.

since you shown no screenshots that's the best I can do before dinner.

_________________
Saving your retinas from the burn!🔥
DD-WRT Inspired themes for routers
DD-WRT Inspired themes for the phpBB Forum
DD-WRT Inspired themes for the SVN Trac & FTP site
Join in for a chat @ #style_it_themes_public:matrix.org or #style_it_themes:discord

DD-WRT UI Themes Bug Reporting and Discussion thread

Router: ANus RT-AC68U E1 (recognized as C1)
dale_gribble39
DD-WRT Guru


Joined: 11 Jun 2022
Posts: 1899

PostPosted: Thu Jun 16, 2022 19:56    Post subject: Reply with quote
Try choosing the correct center frequency (channel 58):

https://en.wikipedia.org/wiki/List_of_WLAN_channels


_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.

--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Thu Jun 16, 2022 19:59    Post subject: Reply with quote
No I can not reproduce.
Although I did not recreate the entire procedure.
But the settings mentioned taken over.

In addition, I have the assumption that the report is nonsense, a VAP has no channel settings and no effect on the set channel.

I have even restarted the router after I have adopted the settings...

Build: v3.0-r49212
bushant
DD-WRT Guru


Joined: 18 Nov 2015
Posts: 2029

PostPosted: Thu Jun 16, 2022 20:09    Post subject: Reply with quote
According to these your channel selection is valid but as pointed out is in the DFS range.
Might want to go down below 52 or above 144.

https://svn.dd-wrt.com/attachment/ticket/5699/ath10k%20channels%20ALL.txt
https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1143980#1143980
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Thu Jun 16, 2022 20:21    Post subject: Reply with quote
https://wiki.dd-wrt.com/wiki/index.php/QCA_wireless_settings#Wireless_Channel

60+UL is a valid channel - of course depending on the regulatory domain

Just post the complete WLAN settings and I'll try to reproduce it.
_trey
DD-WRT Novice


Joined: 28 Jan 2021
Posts: 5

PostPosted: Fri Jun 17, 2022 3:03    Post subject: Reply with quote
Thanks for the replies!

@dale_gribble39 I understand about the center frequency. In this case the chosen channel desn't seem to matter. 60 was what I settled on for providing the repro instructions, but I tried all channels that the GUI would allow me to select in an effort to narrow things down.

@ho1Aetoo I agree that the VAP should have no effect on channel settings, but it seems to have an effect in this case.

I just realized that I left out one critical detail in my reproduction steps. wlan0 needs to be set to radio mode Mesh/802.11s. wlan0.1 is set to radio mode AP. All is well before I change wlan0 to Mesh/802.11s. As soon as that change is made the channel jumps to 100 + 106 and I can't do anything in the GUI to change the channel (even though it still shows whatever I had selected). If I set wlan0 back to radio mode AP, then the channel goes back to whatever I had selected.

I'll grab some screen shots of the details or maybe a video and post immediately after this.
_trey
DD-WRT Novice


Joined: 28 Jan 2021
Posts: 5

PostPosted: Fri Jun 17, 2022 3:20    Post subject: Reply with quote
_trey wrote:
Thanks for the replies!

@dale_gribble39 I understand about the center frequency. In this case the chosen channel desn't seem to matter. 60 was what I settled on for providing the repro instructions, but I tried all channels that the GUI would allow me to select in an effort to narrow things down.

@ho1Aetoo I agree that the VAP should have no effect on channel settings, but it seems to have an effect in this case.

I just realized that I left out one critical detail in my reproduction steps. wlan0 needs to be set to radio mode Mesh/802.11s. wlan0.1 is set to radio mode AP. All is well before I change wlan0 to Mesh/802.11s. As soon as that change is made the channel jumps to 100 + 106 and I can't do anything in the GUI to change the channel (even though it still shows whatever I had selected). If I set wlan0 back to radio mode AP, then the channel goes back to whatever I had selected.

I'll grab some screen shots of the details or maybe a video and post immediately after this.


Here are the screenshots that I mentioned.

1. Wireless settings. I have not changed anything other that basic settings as seen in the pics.

2. Wireless status before adding the VAP.

3. Wireless status after adding the VAP.

If I delete the VAP, then channel on wlan0 will go back to what was selected in the GUI. As long as wlan0 is set to Mesh/802.11s and there is a VAP wlan0.1, then channel is forced to 100.
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Fri Jun 17, 2022 8:18    Post subject: Reply with quote
This seems to be a bug.
If I configure it manually then both interfaces have the same channel.
dale_gribble39
DD-WRT Guru


Joined: 11 Jun 2022
Posts: 1899

PostPosted: Fri Jun 17, 2022 13:48    Post subject: Reply with quote
Using this thread as an anchor reference, the following two thread references make no mention of adding a VAP when using 802.11s mesh mode.

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=330870

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=319628&start=11

It also seems as if nobody has taken the time to do a proper write-up on how to correctly configure 802.11s mesh on DD-WRT. Could you please give your reference on how you came to this point?

_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.

--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Fri Jun 17, 2022 15:20    Post subject: Reply with quote
https://svn.dd-wrt.com/changeset/39606

https://svn.dd-wrt.com/changeset/39652

https://svn.dd-wrt.com/changeset/40034

https://svn.dd-wrt.com/ticket/7049

there is nothing interesting in the thread anyway.
VAP's are supported by dd-wrt in mesh mode but it is broken.
dale_gribble39
DD-WRT Guru


Joined: 11 Jun 2022
Posts: 1899

PostPosted: Fri Jun 17, 2022 15:37    Post subject: Reply with quote
While we're here, let's add the fix for other modes from other associated tickets while we chase the rabbit down the hole:

https://svn.dd-wrt.com/changeset/42873

Could you please re-open that ticket and add this thread as a reference and contact the developer?

_________________
"The woods are lovely, dark and deep,
But I have promises to keep,
And miles to go before I sleep,
And miles to go before I sleep." - Robert Frost

"I am one of the noticeable ones - notice me" - Dale Frances McKenzie Bozzio

<fact>code knows no gender</fact>

This is me, knowing I've ruffled your feathers, and not giving a ****
Some people are still hard-headed.

--------------------------------------
Mac Pro (Mid 2012) - Two 2.4GHz 6-Core Intel Xeon E5645 processors 64GB 1333MHz DDR3 ECC SDRAM OpenSUSE Leap 15.5
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Fri Jun 17, 2022 16:43    Post subject: Reply with quote
@_trey

manuel override

add the following to the "custom config" of the VAP

Code:
vht_oper_centr_freq_seg0_idx=58
channel=60
frequency=5300


You can see if it works the way you want it to

However, everything can be a bit problematic at the moment.
Because of the mac conversion

Edit:

works for me but not stable!! I had to change to the dd-wrt radio firmware otherwise I had all 30-60sec disconnects

and I have switched to AC/N on both Radios and also use WPA3-SEA on the VAP.

@dale_gribble39

I have already done that but I don't know if it has priority at the moment.
_trey
DD-WRT Novice


Joined: 28 Jan 2021
Posts: 5

PostPosted: Fri Jun 17, 2022 19:30    Post subject: Reply with quote
@dale_gribble39 I could not find any proper documentation on 802.11s mesh mode either. I used all three of the threads you mentioned as reference, as well as a couple of other threads.

Specifically, this thread turned me onto the idea of adding the VAP:

https://forum.dd-wrt.com/phpBB2/viewtopic.php?t=319808

I created the VAP to address two things:

1. Without the VAP, no clients could see or connect to the wireless network. Other 802.11s mesh mode routers can connect just fine, but the network was not visible to normal clients.

2. I wanted to support several older devices that do not yet support WPA3. It seemed like WPA3 was required for the mesh network, but I could enable both WPA3 and WPA2 on the VAP.


@ho1Aetoo thanks for posting the manual override! I will try that when I get back to the router this evening and report back on the results.
_trey
DD-WRT Novice


Joined: 28 Jan 2021
Posts: 5

PostPosted: Sun Jun 19, 2022 15:11    Post subject: Reply with quote
@ho1Aetoo quick follow up ... your manual settings also worked for me to get the 5GHz radio operating on the selected channel. I also experienced instability issues and had to set DD-WRT firmware and AC/N Mixed to get it working. It seemed stable with those settings, but even then I could not get any clients to connect to the wireless network.

I may revert to using WDS for now. Happy to help test 802.11s when some of the other issues are worked out.
Goto page 1, 2  Next Display posts from previous:    Page 1 of 2
Post new topic   Reply to topic    DD-WRT Forum Index -> Atheros WiSOC based Hardware All times are GMT

Navigation

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum