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I may be missing something, but if you are simply changing IP addresses and are not changing your domain name, then 301 redirects don't enter into it -- All you'd need to do is to update your DNS to point your existing domain to a new IP address...
If this is the case, best results will be had if you can arrange for both servers to be online --one at the old location and one at the new-- for up to three days. This will allow a seamless transition while the updated DNS data propagates.
Jim