2072: Router Renumbering Guide.

IP addresses currently used by organizations are likely to undergo changes in the near to moderate term. Change can become necessary for a variety of reasons, including enterprise reorganization, physical moves of equipment, new strategic relationships, changes in Internet Service Providers (ISP), new applications, and the needs of global Internet connectivity. Good IP address management may in general simplify continuing system administration; a good renumbering plan is also a good numbering plan. Most actions taken to ease future renumbering will ease routine network administration.