Re: [Xen-users] Xen and routing

[James Bulpin <James.Bulpin@xxxxxxxxxxxx>]

For the benefit of others following this threads and the mailing list
archive - Eric reports this fixed the problem.

J.

On Thu, 2005-05-19 at 11:56, James Bulpin wrote:
> On Wed, 2005-05-18 at 20:52, Eric E wrote:
> > Hi James,
> >     Sorry - for some reason I missed this message until now...  I've 
> > reconfigured eth0 in dom1 without specifying a hardware module.  It 
> > comes up, but still no access into or out of the network...
> [...]
> 
> Something fishy is going on with your dom1 MAC address:
> 
> > dom0:/ # ifconfig
> > eth0      Link encap:Ethernet  HWaddr 00:11:85:F4:87:76
> 
> > dom1:/ # ifconfig
> > 
> > eth0      Link encap:Ethernet  HWaddr 00:11:85:F4:87:76
> 
> i.e. both dom0 and dom1 have the same MAC address. This doesn't play
> well with the bridge or with ARP. Are you specifying that MAC in your
> dom1 config file? If so, use another (just commenting out vif= should be
> fine). Domains in a bridged configuration need to have different MAC
> addresses in the same way that physical machines would do. 
> 
> > --------------------------------------------------------------------------------------------------------------------------------
> > dom0:/# brctl show
> > bridge name     bridge id               STP enabled     interfaces
> > xen-br0         8000.001185f48776       no              eth0
> >                                                         vif7.0
> > --------------------------------------------------------------------------------------------------------------------------------
> > dom0:/# brctl showmacs xen-br0
> > port no mac addr                is local?       ageing timer
> >   1     00:08:02:96:ee:f1       no                33.65
> >   1     00:0d:56:e7:9e:cc       no               235.29
> >   1     00:11:85:7d:39:af       no                 8.98
> >   1     00:11:85:7e:51:eb       no               113.87
> >   1     00:11:85:ee:79:f4       no                 0.00
> >   1     00:11:85:f2:54:4a       no               290.09
> >   1     00:11:85:f2:55:be       no                46.89
> >   1     00:11:85:f4:87:76       yes                0.00
> >   1     00:c0:9f:46:e4:1b       no               128.81
> >   1     00:e0:4c:ae:e6:07       no                17.76
> >   2     fe:ff:ff:ff:ff:ff       yes                0.00
> 
> Note here that no actual address appears on the bridge port #2. 
> 
> James
> 
> 
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