Re: [Xen-users] can VDE be used in Xen

[Simon Capstick <simon@xxxxxxxxxxxxxxxx>]

RumbelStelskin wrote:
> virtual distributed ethernet
>
>
> Todd Deshane wrote:
> > what is VDE?
> >
> > On Jan 29, 2008 2:14 AM, RumbelStelskin <shriram@xxxxxxxxxxx 
> > <mailto:shriram@xxxxxxxxxxx>> wrote:
> >     i have spent the last 5 hours searching for some
> >     post/blog/experience on
> >     VDE Xen combo. but to no avail.
> >
> >     VDE seems to be popular with KVM and other non virtualized
> >     environments
> >     . Are there ways to use it with Xen, i mean, transparently connect a
> >     set of DomUs  in different physical hosts in different networks , to
> >     form one virtual network?
> >
> >     If this cannot be done at Dom0 side, it always can be done at the 
> > DomU
> >     side, where the domu plugs into a vde switch. But are there any
> >     ballpark
> >     stats on the performance drops?
> >
> >     to put things in a nut shell, I am looking for some decent solution
> >     (with acceptable levels of performance loss) to form a virtual 
> > network
> >     of DomUs that are spread across physical machines, across physical
> >     networks (some behind nats/firewalls).
> >     is vlan the way to go?how?
> >
> >     thanks
> >     r
This is how I would go about it:
Use vconfig on Dom0 to create a virtual interface on a VLAN, e.g. 
eth0.1.  Then you would edit the Xen config to use that interface rather 
than the default eth0, in bridge mode of course (the default?).  Do the 
same on all your Dom0s and you have a shared DomU network.  For security 
you should restrict which ports on your switch can use your VLAN ID, 
i.e. the ones with Xen servers!  You will then have to decide how to 
connect the VLAN to the outside world, via a DomU with acting as a 
router or via a physical router on your network.
Simon

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