Re: reconfiguring a two vms bridge to two vms + the host with proper iface naming
Sent: Thursday, October 24, 2024 at 7:43 PM
From: "Daniel P. Berrangé" <berrange(a)redhat.com>
To: "daggs" <daggs(a)gmx.com>
Cc: users(a)lists.libvirt.org
Subject: Re: reconfiguring a two vms bridge to two vms + the host with proper iface
naming
On Thu, Oct 24, 2024 at 06:18:26PM +0200, daggs via Users wrote:
> Greetings,
>
> I have two vms (vm1 and vm2) connected via a bridge named br1.
> libvirt creates two taps, tap0 and tap1
>
> I'm trying to rename them to some thing more meaningful for starts.
> I assume that I cannot use vnet-vm1 or vnet-vm2 so I decided to configure it like
this:
> vm1:
> <interface type='bridge'>
> <source bridge='br1'/>
> <target dev='vnet1'/>
> </interface>
>
> vm2:
> <interface type='bridge'>
> <source bridge='br1'/>
> <target dev='vnet2'/>
> </interface>
>
> but when start the vms, the iface names are still tap1 and tap2. am I doing
something wrong?
I didn't think libvirt created devices with 'tapXXX' naming, all our
generated names should be 'vnetXXX', and we reserve 'vnet' as a prefix
for our own use and will thus discard any such name if the user specifies
it in the XML.
With regards,
Daniel
this is my output:
utils-server:~# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default
qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host proto kernel_lo
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen
1000
link/ether 52:54:00:ab:30:dc brd ff:ff:ff:ff:ff:ff
8: br1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group
default qlen 1000
link/ether 52:54:00:6b:1b:92 brd ff:ff:ff:ff:ff:ff
10: tap0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br1
state UNKNOWN group default qlen 1000
link/ether fe:7f:ea:04:9d:97 brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc7f:eaff:fe04:9d97/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
11: tap1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br1
state UNKNOWN group default qlen 1000
link/ether fe:47:d8:75:ce:ee brd ff:ff:ff:ff:ff:ff
inet6 fe80::fc47:d8ff:fe75:ceee/64 scope link proto kernel_ll
valid_lft forever preferred_lft forever
> --
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