IPv6 Address Planning

Appendix B. IPv6 Prefix Maps

These prefix maps may help you more quickly visualize two of the different subnetting methods presented in Chapter 4. Figure B-1 illustrates the basic format of the prefix maps that follow: Incrementing the leftmost bits (Figure B-2) or the rightmost bits (Figure B-3) of a prefix.

Figure B-1. IPv6 Address prefix bitmap

Figure B-2. /40 to /48, Incrementing the leftmost bits (sparse allocation)

Figure B-3. /40 to /48, Incrementing the rightmost bits (N+1 allocation)