Re: Odd Bridging Quirk

[Josh Triplett <josht@us.ibm.com>]

Chris Babcock wrote:
> I am seeing an odd bridging quirk, on my domU instances.
> 
> When any of my domU's start, they cannot receive any traffic until they
> have sent at least a few packets.  Time seems to have no effect on this
> behavior.  If I let an idle domU sit for an hour, it still fails to
> receive, if it has not originated any traffic.
> 
> My workaround for the moment, is an added rc-init script that pings the
> default gateway a few times when the domain first comes up.
> 
> Is this normal? Should there be a warning in the docs, if it is?  If not,
> does anybody have any ideas what may be causing this?

I think I remember having this same problem when I set up networking 
with Xen.  How are your domains getting their network addresses?  I 
think the problem may have had something to do with ARP not being 
correctly set up between the bridge, the DomU's, and the network, such 
that a domain needed to send some packets out before it was known to 
have a given address.

- Josh Triplett