H3C Technologies H3C SecPath F1000-E - Manual (Page 104)

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Table 1 Mappings between address types and format prefixes
Type Format prefix (binary) IPv6 prefix ID
Unspecified address 00...0 (128 bits) ::/128
Loopback address 00...1 (128 bits) ::1/128
Link-local address 1111111010 FE80::/10
Site-local address 1111111011 FEC0::/10
Unicast
address
Global unicast address Other forms —
Multicast address 11111111 FF00::/8
Anycast address
Anycast addresses use the unicast address space and have the
identical structure of unicast addresses.
Unicast addresses
Unicast addresses comprise global unicast addresses, link-local unicast addresses, site-local unicast
addresses, the loopback address, and the unspecified address.
• The global unicast addresses, equivalent to public IPv4 addresses, are provided for network service
providers. This type of address allows efficient prefix aggregation to restrict the number of global
routing entries.
• The link-local addresses are used for communication among link-local nodes for neighbor discovery
and stateless autoconfiguration. Packets with link-local source or destination addresses are not
forwarded to other links.
• The site-local unicast addresses are similar to private IPv4 addresses. Packets with site-local source
or destination addresses are not forwarded out of the local site (or a private network).
• The loopback address is 0:0:0:0:0:0:0:1 (or ::1). It may never be assigned to any physical
interface and can be used by a node to send an IPv6 packet to itself in the same way as the
loopback address in IPv4.
• The unspecified address is 0:0:0:0:0:0:0:0 (or ::). It cannot be assigned to any node. Before
acquiring a valid IPv6 address, a node fills this address in the source address field of IPv6 packets.
The unspecified address cannot be used as a destination IPv6 address.
Multicast addresses
IPv6 multicast addresses listed in Table 2 are reserved for special purposes.
Table 2 Reserved IPv6 multicast addresses
Address Application
FF01::1 Node-local scope all-nodes multicast address
FF02::1 Link-local scope all-nodes multicast address
FF01::2 Node-local scope all-routers multicast address
FF02::2 Link-local scope all-routers multicast address
FF05::2 Site-local scope all-routers multicast address