Re: [Xen-users] ARP problem with two bridges

[Mike Wright <xktnniuymlla@xxxxxxxxxxxxxx>]

Robert Long wrote:
> Hello all,
>
> I'm having a very weird problem with a Xen server and one of the NICs on
> that server.  The eth1 interface on the server behaves normally, I can
> send and receive packets normally, I get ARP requests - everything is
> happy.  On eth0 however, I do not get ARP requests, or for that matter,
> anything sent to a broadcast address - but I can send out ARP broadcasts
> and get back replies all day long.   This happens in both the Dom0 and
> well as the DomU's.    I've gone over the switch configs and both ports
> are configured the same, nothing remarkably different about the vlans. 
>
> Does anyone have any ideas?  I searched and the only thing I really
> found was setting LANG="C" in the scripts, which I did but still to no
> effect.  If anyone has any ideas, I would really appreciate it.  Thanks
> in advance,
>
> .r'
>
>
>
>
> # brctl show
> bridge name     bridge id               STP enabled     interfaces
> xenbr0          8000.feffffffffff       no              vif1.0
>                                                         peth0
>                                                         vif0.0
> xenbr1          8000.feffffffffff       no              vif1.1
>                                                         peth1
>                                                         vif0.1
>
>
>
> # iptables -nL
> Chain INPUT (policy ACCEPT)
> target     prot opt source               destination        
>
> Chain FORWARD (policy ACCEPT)
> target     prot opt source               destination        
> ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           PHYSDEV
> match --physdev-in vif1.0
I see that the above FORWARD rule only covers one of your interfaces. 
You can use a wildcard, "+", to cover all of them, e.g.
  iptables -A FORWARD -m physdev --physdev-in vif+ -j ACCEPT

Maybe that will help.

:m)

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