[CentOS-virt] How to manually add a new interface to a bridge device?
Zoltan Frombach
zoltan at frombach.com
Wed Dec 9 07:41:39 UTC 2015
I would stop the VM, edit its definition file (that's an XML file) and then
start it up. But be careful: After you edit the XML file, you need to
execute a command so KVM re-reads that file. I forgot that command, but you
can look it up on Google.
On Dec 9, 2015 7:52 AM, "Howard Leadmon" <howard at leadmon.net> wrote:
>
>
> Maybe my google-fu is failing me, but I have spent the past couple hours
> looking at how to add a vnet? Device to my KVM host running CentOS 6, and
> for the life of me I can’t get this going.
>
>
>
> From all my research if I want to add a device I should just do ‘brctl
> addif br1 vnet14’ if I want to add a vnet14 to bridge br1. When I do
> this, I get:
>
>
>
> # brctl addif br0 vnet14
>
> interface vnet14 does not exist!
>
>
>
>
>
> If I run a ‘brctl show’ I get the following:
>
>
>
> # brctl show
>
> bridge name bridge id STP enabled interfaces
>
> br0 8000.00237dd22a4c no eth0
>
> vnet0
>
> vnet10
>
> vnet11
>
> vnet13
>
> vnet2
>
> vnet3
>
> vnet4
>
> vnet6
>
> vnet8
>
> br1 8000.00237dd22a50 no eth1
>
> vnet1
>
> vnet12
>
> vnet5
>
> vnet7
>
> vnet9
>
>
>
>
>
> Needless to say the existing vnet?? Devices are in use on guest VM’s
> currently.
>
>
>
> When I create a new VM using virt-install, I usually add the following to
> my command line:
>
>
>
> --network=bridge:br0 --network=bridge:br1
>
>
>
> I messed up building a new VM, and only added the br0 interface to the VM,
> but need the br1 interface as well. So my question is, or a pointer to how
> I can add that br1 interface to my existing VM, and create the needed
> vnet14 interface for it to attach to?
>
>
>
> If anyone can explain how to do this, or give me a good pointer on where
> the info is on how to do this, it would sure be a huge help..
>
>
>
> Thanks…
>
>
>
>
>
> ---
>
> Howard Leadmon
>
>
>
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> CentOS-virt at centos.org
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>
>
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