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

[Alexandre Kouznetsov <alk@xxxxxxxxxx>]

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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