Xen users - Mar 2008 - Beginner trying to understand Xen networking

I''m just getting going on Xen,
and I''ve read the networking description at the wiki 3 times but just
can''t figure out what option I need to achieve the following:

scenario: we want to be able to move the domU''s around different
hosts, without having to update all instances of the IP''s inside that
system image. Ideally, a domU will think its IP is static at
10.0.3.11, and the actual external IP can change around (perhaps
running on 67.15.0.121 one week, and 207.44.142.111 another).
Essentially, the /etc/xen/(dom) config file would provide the IP and
the internal domU would have no ideal what we going on in ''the outside
world''..

I hope this makes sense, I''ve tried to figure this out but I must be
missing it. I guess I ''just'' want Xen to skip mapping the IP
part of
vif#.0 -> eth0 inside the domain, and transparently translate
everything IP wise. Maybe what I''m describing is some kind of NAT
setup more than anything.

I''m eager to learn, I''m not asking someone to hold my hand
through
everything, but a pointer to "you need X/Y/Z networking" would really
really help me out :)

Thanks for any pointers anyone can give me,
William.

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