
186 Part Two • IPv6 Protocols
The most local scope, interface-local, specifies a single network interface
to be used to transmit multicast packets over the loopback address. The
scope can expand to the local link, site, organization, or global IPv6 Inter-
net. As shown in Table 10–1, the all-zeros (0) and all-ones (0xF) values
are reserved, with half of the rest of the values unassigned (but available
for administrators who want to assign their own regions). Site-local and
link-local scopes correspond to the unicast definitions for those scopes (see
preceding section).
Beyond the link- and site-local scopes that can be automatically defined
by physical