Re: [Xen-users] how to specify vif device name?

["Rudi Ahlers" <rudiahlers@xxxxxxxxx>]

On Wed, Aug 13, 2008 at 2:03 PM, Jan Marquardt <jm@xxxxxxxxxxx> wrote:

Hi Rudi,

the vif name depends on the id of the domain. It is named following this pattern:   vif<domid>.<interface>

For example:

If you have a domain test with the id 13 and two network interfaces, you will see the both following vifs in dom0:

vif13.0
vif13.1


Regards,

Jan

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Rudi Ahlers wrote:

Hi all

Is it possible to specify which vif device a domU VM should use? I see that
it sometimes change around, depending on which order they were started in.
So, how do I tell XEN to always use the same vif for the same domU ?

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Hi Jan

The domain ID changes from time to time, depending on which order the domains were started / restarted
So, this is not very reliable, especially for cacti stats - which uses the device name for traffic graphs



# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      512     1 r-----  14884.2
vm01                                      63      511     2 -b----  12311.3

#xm create pluto
Using config file "/etc/xen/pluto".

Started domain pluto

# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      512     1 r-----  14891.3
pluto                                     67      256     2 -b----      0.2
vm01                                      63      511     2 -b----  12313.5
[root@venus ~]# xm shutdown vm01
[root@venus ~]# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      512     1 r-----  14917.6
pluto                                     67      255     2 -b----      9.6
[root@venus ~]# xm create vm01
Using config file "/etc/xen/vm01".
Started domain vm01
[root@venus ~]# xm list
Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      512     1 r-----  14918.4
pluto                                     67      255     2 -b----      9.6
vm01                                      68      512     2 -b----      0.2
[root@venus ~]#                                                                                        



So, I'd rather want to give the devices their own names, same as you do with Linux (eth0 / eth0:1 / eth0:2 / etc)
--

Kind Regards
Rudi Ahlers

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