Arch Linux

t0mmyt

Member

Registered: 2015-07-05

Posts: 3

How to force band with a netctl profile?

I have a wireless network broadcasting on both a 2.4GHz and 5GHz channels with the same ESSID.  I'm in a very 2.4GHz polluted area but my laptop keeps defaulting to it (using netctl).

I've checked the man pages for netctl and done some searching but I can't seem to find anything where I can specify for the profile to either prefer or force using the 5GHz channel.

Any suggestions on something I've missed?  Or should this be a feature request?

graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,597

Website

Re: How to force band with a netctl profile?

...why are you using the same ESSID for two different radios?

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t0mmyt

Member

Registered: 2015-07-05

Posts: 3

Re: How to force band with a netctl profile?

To allow roaming between the two, it's no different to having multiple APs on the same network on varying channels.

Plus Network Manager has a preferred band option as far as I remember.

Head_on_a_Stick

Member

From: London

Registered: 2014-02-20

Posts: 7,732

Website

Re: How to force band with a netctl profile?

You can use wireless_tools to set the frequency for the interface:

# iwconfig <interface name> freq 5G

You should probably use `iw` instead:

# iw dev <interface name> set freq 5000

http://linuxwireless.org/en/users/Docum … cy_with_iw

Write a udev rule to set this at boot up:

# /etc/udev/rules.d/70-wifi-frequency.rules
ACTION=="add", SUBSYSTEM=="net", KERNEL=="wlan*", RUN+="/usr/bin/iw dev %k set freq 5000"

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graysky

Wiki Maintainer

From: :wq

Registered: 2008-12-01

Posts: 10,597

Website

Re: How to force band with a netctl profile?

To allow roaming between the two, it's no different to having multiple APs on the same network on varying channels.

Plus Network Manager has a preferred band option as far as I remember.

...but in this case, I am assuming that both the 2.40 and 5.00 GHz transmitters reside in the same piece of hardware, no?

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yuvadm

Member

From: Tel Aviv-Jaffa, Israel

Registered: 2012-08-08

Posts: 102

Website

Re: How to force band with a netctl profile?

Bump, curious if anyone found a good solution for this. Same SSID for 2.4+5Ghz is a common scenario, I'd love to force 5Ghz on such networks.

V1del

Forum Moderator

Registered: 2012-10-16

Posts: 21,678

Re: How to force band with a netctl profile?

Don't do that: https://wiki.archlinux.org/index.php/Co … bumping.22

Closing.