Archer c7 v2 5ghz issues

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adm1jtg
Posts: 10
Joined: Tue Oct 17, 2017 5:33 pm

Archer c7 v2 5ghz issues

Post by adm1jtg »

Using the latest stable 1.12 on an archer c7 v2 and the issue I am running into is that the 5ghz devices connected on it within about 5 min all have a connection speed of 6 in the stats for the wireless clients and they never seem to ramp back up. I have 4 devices that are connected on 5ghz and all show the same connection speed after a few minutes.

Is this a known issue (I searched and found absolutely nothing) or is there some setup parameter I am missing specific to 5ghz?

RomanHK
Posts: 794
Joined: Sat May 04, 2013 4:18 pm
Location: Czech Republik

Re: Archer c7 v2 5ghz issues

Post by RomanHK »

Such behavior is completely normal (under certain conditions, 5Ghz WiFi can be completely turned off) and it is a so-called DFS function where weather radars are searched for at this frequency:
https://en.wikipedia.org/wiki/Dynamic_f ... _selection
https://en.wikipedia.org/wiki/List_of_W ... .11j)_WLAN

Try to avoid DFS channels in your country, this should improve stability.
Turris Omnia with OpenWrt 21.02 - Tested
Linksys WRT3200ACM with Gargoyle 1.13.x
TL-WR1043ND v2 with Gargoyle 1.10.0

http://gargoyle.romanhk.cz custom builds by gargoyle users

Lantis
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Location: Australia

Re: Archer c7 v2 5ghz issues

Post by Lantis »

It's not about DFS.

The wifi driver for that device always reports a TX speed of 6mbps even though it is much higher in reality. It is a limitation of the driver.
If your device is performing ok, there's no need to do anything.
http://lantisproject.com/downloads/gargoyle_ispyisail.php for the latest releases
Please be respectful when posting. I do this in my free time on a volunteer basis.

d3fz
Posts: 277
Joined: Sun Aug 28, 2016 7:34 pm

Re: Archer c7 v2 5ghz issues

Post by d3fz »

Lantis wrote:
Wed Jun 03, 2020 5:35 pm
It's not about DFS.

The wifi driver for that device always reports a TX speed of 6mbps even though it is much higher in reality. It is a limitation of the driver.
If your device is performing ok, there's no need to do anything.
That's correct. I've got the same behavior on most of my 5GHz devices and it's all good. Making sure the device signal strength is at least < -70 dBm is the dealbreaker for stability on the 5GHz band, IME.
TP-Link Archer C7 v2 - Gargoyle 1.12.X
TP-Link WR842ND v2 - Gargoyle 1.10.X
TP-Link RE450 AC v2 - Stock FW 1.0.4
TP-Link WA850RE v1.2 - LEDE 17.01.1

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