H3C S3100-52P Operation Manual page 900

Operation Manual – IPv6 Management
H3C S3100-52P Ethernet Switch
IV. Multicast address
Multicast addresses listed in
Table 1-2 Reserved IPv6 multicast addresses
FF01::1
FF02::1
FF01::2
FF02::2
FF05::2
Besides, there is another type of multicast address: solicited-node address. The
solicited-node multicast address is used to acquire the link-layer addresses of neighbor
nodes on the same link and is also used for duplicate address detection. Each IPv6
unicast or anycast address has one corresponding solicited-node address. The format
of a solicited-node multicast address is as follows:
Where, FF02:0:0:0:0:1:FF is permanent and consists of 104 bits, and XX:XXXX is the
last 24 bits of an IPv6 address.
V. Interface identifier in IEEE EUI-64 format
Interface identifiers in IPv6 unicast addresses are used to identify interfaces on a link
and they are required to be unique on that link. Interface identifiers in IPv6 unicast
addresses are currently required to be 64 bits long. An interface identifier is derived
from the link-layer address of that interface. Interface identifiers in IPv6 addresses are
64 bits long, while MAC addresses are 48 bits long. Therefore, the hexadecimal
number FFFE needs to be inserted in the middle of MAC addresses (behind the 24
high-order bits).To ensure the interface identifier obtained from a MAC address is
unique, it is necessary to set the universal/local (U/L) bit (the seventh high-order bit) to
"1". Thus, an interface identifier in EUI-64 format is obtained.
Table 1-2
Address
FF02:0:0:0:0:1:FFXX:XXXX
are reserved for special purpose.
Application
Node-local scope all-nodes multicast address
Link-local scope all-nodes multicast address
Node-local scope all-routers multicast address
Link-local scope all-routers multicast address
Site-local scope all-routers multicast address
1-6
Chapter 1 IPv6 Configuration