Re: [Xen-users] Re: DomU network configuration problem

[Tej <bewith.tej@xxxxxxxxx>]

On 8/11/08, shubham <shubham.sharma@xxxxxx> wrote:
> ---------------8<------------------
>>
>> You can do following steps:
>>
>> 1. Assign any private IP to your DomU
>> 2. Assign the subnet gateway to the domU, above vuf configuration is
>> fine i guess.
>>
>> 3. Now as dom0 is on different subnet, create the eth0 (i assume here
>> that eth0 domU and eth0 of dom0 is connected to xenbr0 ) alias as a
>> gateway for domU.
>>     In dom0:
>>     ifconfig eth0 add domU-gateway netmask.
>> 4. Now that gateway should be pingable
>> 5. Now add the forwarding rules
>>     echo 1 >/procsys/net/ipv4/ip_forward
>>    Now you should be able to ping the eth0 on dom0.
>> 6. Add the masq rule as above.
>>    iptables -t nat -A POSTROUTING -j MASQUERADE (use the eth0 address)
>> 7. Now you should be able to ping google.com
>>
>> HTH
>>
>> -tej
> -------------------8<--------------
>
> i tried these instructions but i could not proceed till step 4.
> i was not able to ping the gateway from domU.

only one reason i could see xenbridge is not connecting dom0 and domU

ensure this connectivity using brctl show:

xenbr0           8000.xxxxx     no                vif0.0
                                                               peth0
                                                               vif<domU-id>.0
if not eth0.0 will not be pingable.

try this if still problem  post following
1. domU ifconfig & route -n
2. dom0 ifconfig & route -n
3. brctl show

-tej


>
> is there any method to know that the eth0 of domU is connected to xenbr0
>
> one more information that i missed out last time was that i am using full
> virtualization. so i just want to confirm that are the above steps fine
> for full virtualization as well?
>
>
>
>
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