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RE: [Xen-users] Dom0 cannot see network when bridge is enabled

  • To: "Ian Duggan" <ian@xxxxxxxxxxxxx>
  • From: "Fischer, Anna" <anna.fischer@xxxxxx>
  • Date: Tue, 11 Sep 2007 08:19:43 +0100
  • Cc: xen-users@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Tue, 11 Sep 2007 00:20:27 -0700
  • List-id: Xen user discussion <xen-users.lists.xensource.com>
  • Thread-index: AcfxkpTx8wbnsh2mT/aHD45pmypn8ABQZObA
  • Thread-topic: [Xen-users] Dom0 cannot see network when bridge is enabled

> I've seen a lot of threads w/ similar problems, but none have 
> posted a resolution.
> I am using Debian 4.0r1 (Etch). I was using the xen packages 
> from stable, but have tried w/ testing as well and the 
> problem persists.
>   http://pastie.caboo.se/95144
> Host is on network
> Dom0 is thus
> DomU is
> When the bridge is enabled, DomU can ping everything. 
> Everything can ping DomU.
> Dom0 can only ping DomU and itself. It can't see the 
> network or anything beyond.
> tcpdumps have not shown any ICMP traffic on any of the 
> interfaces I can see from within the Dom0, and machines in 
> being pinged from the Dom0 see nothing either.
> I'm trying to work out how it's supposed to work. It looks 
> like the bridge works by binding all the interfaces together 
> via a common mac address, is this correct?
> How then, do peth0 and eth0 see each other's traffic?

I assume you have already checked this, but did you look at your
iptables configuration to make sure that packet filtering is not
blocking any traffic?

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