Xen devel - Sep 2011 - xen 4.1.1 missing veth0 <--> vif0.0 pairs

Hi,

I am using Xen 4.1.1 with Linux 3.0.1 kernel. Previously (Xen 3.4.4 and
linux kernel 2.6.18) Xen by default created veth0 <--> vif0.0 pair in
dom0.
With Xen 4.1.1 these pairs are missing in dom0.
Using command ''ip link add type veth'' I can create veth0 and
veth1 but
vif0.0 is still missing in dom0. (When new domU created I can see vif1.x
created)
Could you please help me with understanding following things
1) Is veth is replaced by something? and if yes what is it?
2) How to create veth0 <--> vif0.0 pairs? Or how to create vif0.x
interfaces?
3) In which version of Xen these changes regarding veth - vif0.0 are made?

Thank you in advance.
SG


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On Fri, Sep 9, 2011 at 8:32 PM, Shriganesh Shintre
<shriganeshs@gmail.com> wrote:
> Hi,
>
> I am using Xen 4.1.1 with Linux 3.0.1 kernel. Previously (Xen 3.4.4 and
> linux kernel 2.6.18) Xen by default created veth0 <--> vif0.0 pair in
dom0.
> With Xen 4.1.1 these pairs are missing in dom0.
> Using command ''ip link add type veth'' I can create veth0
and veth1 but
> vif0.0 is still missing in dom0. (When new domU created I can see vif1.x
> created)
> Could you please help me with understanding following things
> 1) Is veth is replaced by something? and if yes what is it?
> 2) How to create veth0 <--> vif0.0 pairs? Or how to create vif0.x
> interfaces?
> 3) In which version of Xen these changes regarding veth - vif0.0 are made?
>
I''m not sure what you are trying to do exactly, but I would recommend
taking a look at:
http://wiki.xensource.com/xenwiki/MigrationGuideToXen4.1%2B

Guest networking/bridging should now be handled by the distro and not
with the xend network scripts anymore.

Hope that helps.

Thanks,
Todd

-- 
Todd Deshane
http://www.linkedin.com/in/deshantm
http://www.xen.org/products/cloudxen.html
http://runningxen.com/

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On Fri, Sep 09, 2011 at 09:29:22PM -0400, Todd Deshane
wrote:
> On Fri, Sep 9, 2011 at 8:32 PM, Shriganesh Shintre
> <shriganeshs@gmail.com> wrote:
> > Hi,
> >
> > I am using Xen 4.1.1 with Linux 3.0.1 kernel. Previously (Xen 3.4.4
and
> > linux kernel 2.6.18) Xen by default created veth0 <--> vif0.0
pair in dom0.
> > With Xen 4.1.1 these pairs are missing in dom0.
> > Using command ''ip link add type veth'' I can create
veth0 and veth1 but
> > vif0.0 is still missing in dom0. (When new domU created I can see
vif1.x
> > created)
> > Could you please help me with understanding following things
> > 1) Is veth is replaced by something? and if yes what is it?
> > 2) How to create veth0 <--> vif0.0 pairs? Or how to create
vif0.x
> > interfaces?
> > 3) In which version of Xen these changes regarding veth - vif0.0 are
made?
> >
> 
> I''m not sure what you are trying to do exactly, but I would
recommend
> taking a look at:
> http://wiki.xensource.com/xenwiki/MigrationGuideToXen4.1%2B
> 
> Guest networking/bridging should now be handled by the distro and not
> with the xend network scripts anymore.
> 
Yep, see the end of:
http://wiki.xen.org/xenwiki/XenBestPractices

which has a link to:
http://wiki.xen.org/xenwiki/HostConfiguration/Networking

veth0 <-> vif0.0 was just a local loopback in dom0,
nothing Xen specific in it really.

You can get the same behaviour by creating, say, dummy0,
and use that.. (if you really want that behaviour).

-- Pasi


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