Administering Network Numbers

If your organization has been assigned more than one network number, or uses subnets, appoint a centralized authority within your organization to assign network numbers. That authority should maintain control of a pool of assigned network numbers, and assign network, subnet, and host numbers as required. To prevent problems, ensure that duplicate or random network numbers do not exist in your organization. If you are planning to transition to IPv6, see Chapter 17, Transitioning From IPv4 to IPv6 (Reference).