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multicast address
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... belonging to different nodes). A packet sent to a
multicast address is delivered to all interfaces
identified by that address ...
... 1080:0:0:0:8:800:200C:417A a unicast address
FF01:0:0:0:0:0:0:101 a multicast address
0:0:0:0:0:0:0:1 the loopback address ...
... 1080::8:800:200C:417A a unicast address
FF01::101 a multicast address
::1 the loopback address ...
... Site-Local Unicast Addresses 1111 1110 11 1/1024
Multicast Addresses 1111 1111 1/256
Notes:
...
... prefix space.
(2) The format prefixes 001 through 111, except for Multicast
Addresses (1111 1111), are all required to have to have 64-bit
interface identifiers ...
... addresses, local use addresses, and multicast addresses. Space is
reserved for NSAP addresses and IPX ...
...
Unicast addresses are distinguished from multicast addresses by the
value of the high-order octet of the addresses ...
... FF
(11111111) identifies an address as a multicast address; any other
value identifies an address as a unicast address ...
... Multicast Addresses ...
... node may belong to any number of multicast groups. Multicast
addresses have the following format:
...
...
T = 0 indicates a permanently-assigned ("well-known") multicast
address, assigned by the global internet numbering authority.
...
...
T = 1 indicates a non-permanently-assigned ("transient")
multicast address.
scop is a 4-bit ...
...
The "meaning" of a permanently-assigned multicast address is
independent of the scope value. For example, if the "NTP servers
...
... NTP servers
group" is assigned a permanent multicast address with a group ID of
101 (hex), then:
...
...
Non-permanently-assigned multicast addresses are meaningful only
within a given scope. For example, a group identified by the non-
...
... group identified by the non-
permanent, site-local multicast address FF15:0:0:0:0:0:0:101 at one
site bears no relationship to a group using the same address ...
...
Multicast addresses must not be used as source addresses in IPv6
packets or appear in any routing header ...
... Pre-Defined Multicast Addresses ...
...
The following well-known multicast addresses are pre-defined:
...
...
Reserved Multicast Addresses: FF00:0:0:0:0:0:0:0
FF01:0:0:0:0:0:0:0
FF02:0:0:0:0:0:0:0
...
...
The above multicast addresses are reserved and shall never be
assigned to any multicast group.
...
... unicast and anycast addresses. The solicited-node multicast address
is formed by taking the low-order 24 bits of the address ...
...
For example, the solicited node multicast address corresponding to
the IPv6 address 4037::01:800:200E:8C6C is FF02::1:FF0E:8C6C. IPv6
addresses ...
... join the associated Solicited-Node
multicast addresses for every unicast and anycast address it is
...
... All-Nodes Multicast Addresses ...
... All-Routers Multicast Addresses ...
... Pre-Defined Multicast Addresses ...
... Added rules for defining new multicast addresses. ...
... Added site scope all routers multicast address. ...