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[Xen-users] Possible Broadcom-related problem?

I'm configuring Xen on a blade in an Intel SBCE.  Currently I'm using
Fedora Core 6 with all patches installed and the Xen 3.0.3 RPMs that are
part of that distribution, in the default configuration.

When xend is started it appears that the network bridging breaks
something such that although I can see ARP traffic (possibly all
broadcast traffic?) arriving, no ICMP/TCP/UDP packets appear to
reach the machine.  Running

  /etc/xen/scripts/network-bridge stop

returns things to normal.

Reading around it looks like some people have ascribed this problem to
a problem with the Broadcom NICs used on the blades, but I've upgraded
the firmware to 1.9.6 (the latest I can find) with no obvious change in

I have a very similar configuration (FC6/same kernel/same xen RPMs/same
default configuration) running ok on a different box, so I don't believe
I've got anything too seriously wrong software-wise.

Any ideas on why might be wrong and/or how to fix it?  Obviously I could
change to a routed network connection, but I'd very much prefer the
bridged option if at all possible.


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