Re: [Xen-users] can't get multiple VLANs to work

[Tomasz Chmielewski <mangoo@xxxxxxxx>]

Sébastien CRAMATTE wrote:
> Tomasz Chmielewski a écrit :
> > Angel L. Mateo wrote:
> > > Hello,
> > >
> > >     I have Xen running with domUs in different VLAN's. I have xen on a
> > > debian sarge server. My configuration is:
> > >
> > > * In dom0, I have a bridge for each vlan (different than the native vlan
> > > of interface eth0, that I don't need to tag). For each vlan the
> > > configuration is (for vlan 302):
> > >
> > > vconfig add eth0 302
> > > /etc/xen/scripts/network-bridge start netdev=eth0.302 bridge=xen-br302
> > > antispoof=no
> > > /sbin/ifconfig eth0.302 up
> > >
> > > * In the domU the configuration I have is:
> > >
> > > vif = [ 'bridge=xen-br302' ]
> > >
> > > * The only problem is that un domU I have to run "/usr/sbin/ethtool -K
> > > eth0 tx off" after bring it up.
> > I this configuration, do you run a "normal" device (like eth0) in 
> > domU, or is it also a VLAN (eth0.302 in dom0, but also in domU)?
> I believe that is  one  or other ...
> If you setup  vlan per bridge in dom0  you just mount  eth0 in domU
> else you setup just the default bridge  in dom0 and  VLANs in each domU
>
> Look at  this blog, it's quite well explained ...
> http://felipe-alfaro.org/blog/category/xen/
Yes, I've read it.


1. For me it works if:

- dom0 has one bridge, eth0 attached to it
- VLAN is made *only* in domUs


2. It doesn't work if:

- dom0 has multiple bridges, with different VLANs attached to it
- domU has a normal network setup (no VLANs configured)

In the case when it doesn't work, domU doesn't receive any packets - 
"tcpdump -i eth0" shows only packets that domU wants to send, but 
nothing else.
Only domU attached to "default bridge" (xenbr0 + eth0) has network 
connectivity.


--
Tomasz Chmielewski
http://wpkg.org

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