[libvirt] libvirt/kvm config for routed networking

[William Wagner]

Hello,

I hope this is the right list I should post to as my question is not 
development related.

I am trying to setup a kvm/libvirt VM on my host (Ubuntu jaunty). My 
host has a public static IP and my VM also has a public static IP. 
Unfortunately I can not use bridged networking as the hosting provider 
has configured their switch to only accept packets from the MAC address 
of the host.

I want to be able to setup my VM so it has the public static IP and it 
appears to be directly connected to the net. I believe I can do this 
with routed networking.

I have created a new routed network:
<network>
<name>routed-net</name>
<bridge name="routed%d" />
<forward mode="route" dev="eth0"/>
<ip address="10.255.255.2" netmask="255.255.255.255">
</ip>
</network>

and in my vm's config I have:
<interface type='user'>
<source network='routed-net'/>
<mac address='54:52:00:47:a8:38'/>
<model type='virtio'/>
</interface>

Will this mean that the VM is placed on the routed network?

Then I just need to add suitable routing rules on the host and 
everything should work?

Is there a way to get libvirt to add the rules automatically when the VM 
starts. I have previously used Xen where you are able to specify what 
the IP address of the VM is and entries are automatically added to 
iptables. Is there similar syntax for libvirt and if so what is it? If 
not how do you recommend adding the routing rules?

Thanks.

Will.

-- 
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Will Wagner                                     will_wagner at carallon.com
Development Manager                      Office Tel: +44 (0)20 7371 2032
Carallon Ltd, Studio G20, Shepherds Building, Rockley Rd, London W14 0DA
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