Re: [Xen-users] Cannot ping from dom0 to domU and vice versa

[Ernst Bachmann <e.bachmann@xxxxxxxx>]

On Thursday 22 September 2005 18:10, Srinivasan S wrote:
...
> vif= ['mac=aa:00:10:00:00:10, bridge=xen-br0']
> ip = "192.168.2.2"
...

> Boots and allows me to login .. then I tried to ping the dom0 from domU and
> it didnt work.  Heres the ifconfig from domU:
>
> eth0      Link encap:Ethernet  HWaddr AA:00:10:00:00:10
>           inet addr:192.168.2.2  Bcast:192.168.2.255  Mask:255.255.255.0

...

> Heres the ifconfig from dom0, I have 2 nics one local n/w (eth1) and the
> other for the internet via router (eth0):
>
> eth0      Link encap:Ethernet  HWaddr 00:50:BA:08:43:4C
>           inet addr:192.168.1.100  Bcast:192.168.1.255  Mask:255.255.255.0
>
> eth1      Link encap:Ethernet  HWaddr 00:0E:A6:15:8D:FB
>           inet addr:192.168.2.1  Bcast:192.168.2.255  Mask:255.255.255.0
>
> xen-br0   Link encap:Ethernet  HWaddr 00:50:BA:08:43:4C
>           inet addr:192.168.1.100  Bcast:192.168.1.255 
>
> Please let me know how I get the two doms to ping each other

Well, simple routing problem:

your xen-br0 bridge has eth0 enslaved, and thus is in the 192.168.1.* subnet, 
while your domU think it has a 192.168.2.* subnet, and ip inside it.

you'll probably want to enslave eth1 to xen-br0 instead of eth0, but giving 
domU a 192.168.1.x IP address would work, too.

/Ernst

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