Re: [Xen-devel] network-bridge script reworked

[Ted Kaczmarek <tedkaz@xxxxxxxxxxxxx>]

On Wed, 2005-10-19 at 23:40 +0100, Ewan Mellor wrote:
> On Wed, Oct 19, 2005 at 06:00:15PM -0400, Ted Kaczmarek wrote:
> 
> > On Wed, 2005-10-19 at 22:44 +0100, Ian Pratt wrote:
> > >  > I hacked on the network-bridge script.
> > > > 
> > > > It now works much better for me:
> > > > * we got rid of ifconfig
> > > > * it works for netdev != eth0
> > > > * arp on and off are symmetric as are ifdown and ifup
> > > 
> > > Didn't we decide we needed to also set 'arp off' on the bridge to avoid
> > > the 'seen packet with own mac address' complaints?
> > > 
> > > Thanks,
> > > Ian
> > 
> > I was hoping one of those guys working for one of those big shops would
> > have put a tap on this by now. Would be nice to know what this ethernet
> > frame before disabling the arp.
> 
> We have seen the old script get things into a state whereby the machine's
> routing tables claim to be going through peth0 rather than eth0.  At the very
> least, if this happened with two Xen machines on the network, then one would
> complain about packets coming from the other, and I have observed this 
> behaviour
> directly.
> 
> Can anyone claim to have seen the error message with only one Xen machine on
> the network?
> 
> Ewan.
Nope, I have repeatedly tested and have only seen this when the
domU's/DomO's share a broadcast domain on the peth interface. Been
running test bed where eth0 is disconnected and xen-br0 is enslaved to
it for almost two days now. Not a single instance of this message.

Regards,
Ted


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