Re: [Xen-devel] [PATCH] example and default IP addresses

["Daniel P. Berrange" <berrange@xxxxxxxxxx>]

On Thu, Jan 17, 2008 at 03:35:02PM +0000, Ian Jackson wrote:
> Dan Magenheimer writes ("RE: [Xen-devel] [PATCH] example and default IP 
> addresses"):
> > In the patch to network-nat, I see that you are replacing the 10.0.0.0/16
> > usage with 192.0.2.0/24.  Actually, vif-nat has a dependency on it
> > being 10.0.0.0/8(!), at least if more than 256 domains are launched (not
> > necessarily simultaneously, just sequentially created and destroyed).
> > In vif-nat ip_from_dom, IP's are created as 10.x.y.z for vifw.z, where
> > x*256+y==w.
> 
> Firstly, I think it's important to note that network-nat and vif-nat
> are pretty ropey.  Anyone who is using them will almost certainly have
> had to adjust them to local conditions anyway.  For example, these
> scripts attempt to find and edit your local dhcp server configuration
> file !

FYI, for anyone using libvirt we recommend only using network-bridge
and vif-bridge. libvirt then provides a 'virtual network' capability
which allows you to define multiple local networks either completely
isolated from the physical network, or connected via NAT. This effectively
provides same functionality as vif-nat/network-nat, but without requiring
the admin to modify shell scripts.

Dan.
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