Xen users - Mar 2006 - Demo Live CD, networking, external IP

Hello!
This is my first time with Xen.

I was able to boot Debian from Xen 3.0 Demo Live CD and start "Debian 
Guest" or "CentOS Guest".
I can also change IP address of Domain0, by calling ifconfig.
I can also ping guest from Domain0, by using IP of domU, for instance 
10.0.1.128.

What I want to achieve is access to the domU from the outside world.
I''ve read that it is possible to have external IP (visible from
outside)
for domU.

I''ve read http://wiki.xensource.com/xenwiki/XenNetworking, but
it''s very
complex.
I probably need vif-bridge. But - if I understand it correctly - it is 
just a script, which runs each time domU is started. So what exactly do 
I need to change?

Could you give me working example of bridge configuration for Demo CD?


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On Thu, Mar 30, 2006 at 05:08:22PM +0200,
 Jacek Poplawski <jacekp@s3group.com.pl> wrote 
 a message of 30 lines which said:
> What I want to achieve is access to the domU from the outside world.
No problem.
> I''ve read that it is possible to have external IP (visible from
> outside) for domU.
Yes. From my (limited) experience, setting the IP address of a domU
from /etc/xen/something.cfg does not always work. I always use DHCP or
a fixed IP address configured from the domU itself.
 
> I''ve read http://wiki.xensource.com/xenwiki/XenNetworking, but
it''s very
> complex.
It depends on how you installed Xen but, most of the times, the basic
networking (a virtual switch in the dom0) "just works". I had nothing
to do on my first Xen installation. Type "ifconfig" on the dom0 to see
if the switch is there (xenbr0).

Did you try to just set the IP address on the domU? It should work.

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Stephane Bortzmeyer napisał(a):
> It depends on how you installed Xen but, most of the times, the basic
> networking (a virtual switch in the dom0) "just works". I had
nothing
> to do on my first Xen installation. Type "ifconfig" on the dom0
to see
> if the switch is there (xenbr0).
>
> Did you try to just set the IP address on the domU? It should work.
>   
You probably mean connection between dom0 and domU. It works.
What I mean is connection between outside world and domU.
There is a computer with one ethernet network card, it has IP 192.168.89.62.
I want to start Xen demo there and create domU with IP 192.168.89.207 
and communicate from it with other computers from this network, like 
192.168.89.53 for instance..

If I understand documentation correctly - it is possible with bridge. I 
just don''t understand how to configure bridge, and I am asking for 
simple example (better than in networking documentation of xen).

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