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#1 2019-10-21 16:54:42

eiboon
Member
Registered: 2016-04-28
Posts: 14

Unable to add bridge

Hi

Ive been searching for a while but I cannot seem to find the information to help me with my problem.

I am running:

sudo ip link add br0 type bridge

What is being returned is:

Error: Unknown device type.

From documentation for ip link it looks like I am running this correctly.  My thoughts are that I am running something that is conflicting with me creating a network bridge, but I have no idea.  It doesnt seem to like anything after type.

Not sure what information is required, so happy to provide more on request.

Regards

Dave

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#2 2019-10-21 21:36:02

Zod
Member
From: Hoosiertucky
Registered: 2019-03-10
Posts: 629

Re: Unable to add bridge

Is this the documentation you're referring to?

https://wiki.archlinux.org/index.php/Network_bridge

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#3 2019-10-22 11:16:36

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 11,868

Re: Unable to add bridge

# ip link add name bridge_name type bridge

Look carefully, how many values should there be between add & type ?


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.


(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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#4 2019-10-25 16:58:28

eiboon
Member
Registered: 2016-04-28
Posts: 14

Re: Unable to add bridge

Yes I did originally and it didnt work from the guide so I did more googling and it mentioned missing the

name
ip link add name br0 type bridge

I just get unknown device.  From the manual it doent mention any dependancies that need to be installed, or services that need to be stopped.  I have:

system-netctl.slice         loaded active active    system-netctl.slice

...but thats it in terms of netctl, dhcpcd or dhcpd4.

Cheers

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#5 2019-10-26 12:47:23

Lone_Wolf
Member
From: Netherlands, Europe
Registered: 2005-10-04
Posts: 11,868

Re: Unable to add bridge

A brdige nees to be added to an actual network device.

Which of your network devices do you want to use for this bridge ?

The name of that device is what you use in the ip link command.


Disliking systemd intensely, but not satisfied with alternatives so focusing on taming systemd.


(A works at time B)  && (time C > time B ) ≠  (A works at time C)

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#6 2019-12-16 15:53:22

eiboon
Member
Registered: 2016-04-28
Posts: 14

Re: Unable to add bridge

Hi,

Really sorry for the delay.  I have two adapters that I would like to bridge:

2: enp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DEFAULT group default qlen 1000
    link/ether 00:1a:64:3c:60:08 brd ff:ff:ff:ff:ff:ff
3: wlp0s16f4u2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT group default qlen 1000
    link/ether 00:c0:ca:90:7a:6b brd ff:ff:ff:ff:ff:ff

eth is the primary connection, so are you saying I should run:

sudo ip link add name enp3s0 type bridge

As I get the response:

RTNETLINK answers: File exists

I thought this would be as expected as I need to create the bridge adapter.

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#7 2019-12-16 15:59:15

seth
Member
Registered: 2012-09-03
Posts: 49,979

Re: Unable to add bridge

No, you should pass the desired bridge name which cannot be enp3s0 because that's an existing NIC.

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#8 2019-12-16 16:23:06

eiboon
Member
Registered: 2016-04-28
Posts: 14

Re: Unable to add bridge

If I use br0 I get a response like I have put the command in wrong:

[dave@archlinux ~]$ sudo ip link add name br0 type bridge
Error: Unknown device type.
[dave@archlinux ~]$ sudo ip link add name br0id1 type bridge
Error: Unknown device type.

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#9 2019-12-16 16:28:20

schard
Member
From: Hannover
Registered: 2016-05-06
Posts: 1,932
Website

Re: Unable to add bridge

Did you forget to reboot after the last kernel upgrade?

pacman -Q linux
uname -r

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#10 2019-12-16 16:31:09

eiboon
Member
Registered: 2016-04-28
Posts: 14

Re: Unable to add bridge

Should those match? As they don't, rebooting now.

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#11 2019-12-16 16:34:44

eiboon
Member
Registered: 2016-04-28
Posts: 14

Re: Unable to add bridge

[action]
Gets up out of chair and walks off to find a new job.
[/action]

Thanks very much can't believe (well I totally can) it was because I hadn't rebooted.

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#12 2022-02-25 16:21:27

LordAlveric
Member
Registered: 2021-11-05
Posts: 2

Re: Unable to add bridge

This was exactly my problem! Wow. Thanks.

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