Re: [Xen-users] Understanding Network

[Subhabrata Bhattacharya <xions.microcosm@xxxxxxxxxxxxxx>]

Hi,

How do you want the two NICs to be used? Please explain the IP
addresses, subnet masks etc. you are planning to assign to the
interfaces.
Are you going to use one of them for outside network and  one for the
VMs or you would like your VMs to see eth0 and eth1?
For both the interfaces you might need to create separate bridges and
attach the virtual interfaces created after booting the VMs.

> - filtering network traffic between the domUs,
Have a look at this piece of work:
http://www.gup.uni-linz.ac.at/xen/doc/network.php

Danke!
~$ubh


On 8/1/05, Dirk H. Schulz <applelists@xxxxxxxxxxxxxxxxxxx> wrote:
> Hello to all xen gurus and gurus to be,
> 
> 
> first the usual disclaimer:
> I am new to xen (besides 2 weeks of intense looking into it); I tried to find 
> in depth documention to networking inside the xen system, but I fould only 
> hints on how much more info I would need. So please bear with me if my 
> questions are too simple and kindly point me to the right docs.
> 
> One of my test systems has 2 NICs (different chipsets). I managed to compile 
> and run a xen0 kernel based on the debian inofficial packages. When I tested 
> networking I found the following:
> I had activated the drivers for both NICs in the kernel. When I activated 
> both NICs in /etc/network/interfaces, no networking at all was possible. When 
> I activated one of the NICs in /etc/network/interfaces, then either the 
> outside could be reached (everything outside my gateway), or the local subnet 
> the xen0 server is placed into. I did not succeed in getting both to work.I 
> had to deactivate one of the NIC's device drivers in the kernel. Thank God is 
> was a system with two different types of NICs.
> 
> So what do I do with a system that has two IDENTICAL NICs? And where do I 
> find in depth documentation of networking with Xen? I have read about the 
> bridge in standard config, but found no hint on what else could be done.
> I would escpecially look for docs about
> - the VLAN feature,
> - filtering network traffic between the domUs,
  - how to use multiple NICs.
> 
> Any help or hint is appreciated!
> 
> Thanks in advance,
> 
> Dirk

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