Re: [Xen-users] Dom0 seeing traffic on br0 but it's not routing

["Glenn E. Bailey III" <replicant@xxxxxxxxxxxxxxxx>]

Iptables is off, and I've tried dropping the e1000 w/no luck.

You might be on to something w/the switch idea. So are you saying
clone Dom0's MAC to DomU's and then see if I can ping the gateway from
DomU (You stated Dom0)?

On Fri, Nov 22, 2013 at 1:04 PM, Alexandre Kouznetsov <alk@xxxxxxxxxx> wrote:
> Hello.
>
> El 22/11/13 11:18, Glenn E. Bailey III escribió:
>
>> The issue is that appears to be that bridging isn't fully working as
>> the DomU can't ping anything *other* than the Dom0. When I do a
>> tcpdump on the DomU I can see the correct arp traffic that the Dom0
>> should be seeing,  but I can't ping the gw on that network, again only
>> the Dom0 ip. Also, when I do a tcpdump on the Dom0 I can see the DomU
>> sending arp request trying to find the gw I'm trying to ping.
>
> Are you watching Dom0's br0 or eth0?
>
>> Some basic config info:
>
> Seems correct, after your update in replay to Wei Liu.
> I guess, "1" is the ID of your Centos guest and vif1.0 and vif1.0-emu are
> also shown in ifconfig's output.
>
> "vif1.0-emu" is new for me. Are you using HVM or PV DomU? Try dropping
> "model=e1000" parameter from your vif config, for sake of simplification.
>
> Do you have any special ipfilter setup on Dom0? DROP policy in FORWARD
> chain, maybe? Check with "iptables -L -v".
>
> Also, there might be something set wrong on your ethernet switch, like MAC
> address blocking. I have faced that in a couple occasions, they was always a
> real pain to troubleshoot. The only way I can think of to make sure it's not
> so, is to clone your DomU's MAC to Dom0's eth0 and try to ping the gateway
> from Dom0.
>
> Greetings.
>
> --
> Alexandre Kouznetsov
>
>
>
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