
Chapter 11 • IPv6 Anycast 201
| n bits | 128-n bits |
+------------------------------------------------+----------------+
| subnet prefix | 00000000000000 |
+------------------------------------------------+----------------+
Figure 11–1: Subnet-Router anycast address format (from RFC 3513).
second, anycast addresses may not be used as the source address of
a packet.
Required anycast address The Subnet-Router anycast address (see
Figure 11–1) is required to allow nodes to send out packets that are
to be delivered to one router on the subnet indicated in the desti-
nation address prefix. The format is shown in the Figure. Routers
are required to be prepared ...