Migrating to a subnetted network

To change from an internetwork that does not use subnets to one that is subnetted:

1. Decide on the new subnet topology, including considerations for subnet routers and locations of hosts on the subnets.

2. Allocate addresses to all hosts that have static addresses.

3. Reconfigure all hosts and routers to use their new IP addresses.

4. Reconfigure the services that use IP addresses. Examples are:

   • Routing daemon configuration

   • DNS

   • Address server entries

   • PPP

   • DHCP

   • BOOTP

   • NIS

   • netBIOS

   • UNRESOLVED XREF-0 VisionFS

   • NFS

More information about subnets may be obtained by consulting the following RFCs:

RFC	Title
1518	An Architecture for IP Address Allocation with CIDR
1519	Classless Inter Domain Routing (CIDR): an Address Assignment and Aggregation Strategy
1812	Requirements for IP Version 4 Routers
1878	Variable Length Subnet Table For IP Version 4