Re: [Xen-devel] [help] what's the relationship between vif*.*

["¤終於aware" <250716708@xxxxxx>]

thanks, you mean that only the tap device  is enough for HVM domainU and the vif is specially for paravirtulization. 

 

On 26.12.2011 04:30, ???aware wrote:
> >Hi everyone,
>>  A pair of network interface, vif and tap, will connect the bridge
> >when a vm starts. What's their relationship?
> > thanks for reply~
>>
>> cheers
>> bruce

>If I understand correctly, the vif is a virtual interface that works
>with pv drivers in domU.  The tap is a Qemu interface that is used with
>HVMs that don't have pv drivers.  So, if you start a HVM domU, you'll
>have the vif that Xen creates and the tap that Qemu creates, if pv
>drivers are available, then once they are loaded Domu uses them and the
>tap goes away, but if not then both remain, but only the tap interface
>is being used.  Obviously, if you need more detailed explaination, then
>I'm of no further use.:)
>Mike

 

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