Re: [Xen-users] xen vlans in domU

[Alexander Kriventsov <avk@xxxxx>]

03.08.2010 15:43, Mark Adams пишет:
> On Tue, Aug 03, 2010 at 02:27:44PM +0400, Alexander Kriventsov wrote:
> > 03.08.2010 14:18, Mark Adams ??????????:
> > > Hi,
> > >
> > > I used the instructions/scripts at the following link to do my VLAN's.
> > > Works pretty well!
> > >
> > > http://renial.net/weblog/
> > I think that vlanbr2 is bridge for vlan 2 and vlanbr3 for vlan 3.
> > If I want to use vlan 2 and vlan 3 in one domU I should write in config
> > vif = [ 'bridge=vlanbr2', 'bridge=vlanbr3' ] and in this domU I will get
> > two interfaces eth0 and eth1. Is it correct?
> > But I want to have another, I want to have on domU all these vlans on
> > one interface and configure it through vconfig.
> not tested but I don't see why it wouldn't work.... you could just
> manually add the extra vlans in to the network-bridge-vlan script, with
> lines like this
>
> vconfig add ${netdev} 2
> vconfig add ${netdev} 3
> vconfig add ${netdev} 4
>
> etc...
>
> have you tried it?
this will add separate interfaces on dom0?

> > > On Tue, Aug 03, 2010 at 07:49:03PM +1000, James Harper wrote:
> > > > > Hello.
> > > > > I'm trying to use vlan in domU, but have something strange:
> > > > > I created bridge on eth0. This interface was configured as trunk with
> > > > > vlan 300, 301. I use this bridge in my domU, and I can see tagged
> > > > > packets when run tcpdump in domU. Also I created interface on domU to
> > > > > work with vlan 300. On this interface I see untagged packets in vlan300.
> > > > > And everything looks fine.
> > > > > But when I'm trying to send out packets through interface with vlan300
> > > > > something happen. On domU in eth0 interface i see that packet was tagged
> > > > > as vlan 300, but on dom0 I see that package doesn't have tag and sending
> > > > > to switch as untagged which is incorrect.
> > > > >
> > > > > Why does kernel remove tag from outgoing packets?
> > > > > Is anyone using trunk inside of domU?
> > > > >
> > > > > I'm using xen 3.4.3 on Centos 5.5 with kernel 2.6.18.
> > > > I'm not sure I quite understand what you want to do, but I think you need to 
> > > > use ebtables, in particular the 'broute' table, to tell Linux how you want 
> > > > tagged packets to behave. One thing I was never able to do was to tell Linux to 
> > > > place a copy of the tagged packet on one bridge so that I could have a trunk to 
> > > > a DomU whilst simultaneously l2 routing packets to their correct interfaces.
> > > >
> > > > James
> > > > _______________________________________________
> > > > Xen-users mailing list
> > > > Xen-users@xxxxxxxxxxxxxxxxxxx
> > > > http://lists.xensource.com/xen-users
> > --
> > Alexander Kriventsov
--
Alexander Kriventsov

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