January 2004
Intermediate to advanced
536 pages
13h 2m
English
Content preview from IPv6, 2nd Edition
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Chapter 10 • IPv6 Multicast 185
| 8 | 4 | 4 | 112 bits |
+--------+----+----+---------------------------------------+
|11111111|flgs|scop| group ID |
+--------+----+----+---------------------------------------+
^
|__________________________
\
+-+-+-+-+
flgs is a set of four flags, the |0|0|0|T|
the first three reserved and set +-+-+-+-+
to 0; the fourth indicating
whether the address is a “well-known” multicast address
(T=0) or a “transient” (T=1) multicast address.
Figure 10–1: IPv6 multicast address format (from RFC 3513).
Value Scope
0 reserved
1 interface-local scope
2 link-local scope
3 reserved
4 admin-local scope
5 site-local scope
6 (unassigned)
7 (unassigned) ...
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