Anycast Address - Zte ZXR10 5900E Series User Manual

Link-Local Unicast
Address
IPv4-Compatible
IPv6 Address
address is private address and only can be used in local site. Its
format is shown in Table
T 4 SITE-LOCAL UNICAST ADDRESS FORMAT
ABLE
10 bits
1111111011
Link-local unicast address can be automatically configured on in-
terface with prefix FE80::/10 (1111 1110 10). It is usually used in
Neighbor Discovery Protocol (NDP) and un-stateful automatic con-
figuration. Local nodes can use this address to communicate in-
stead of global unicast address and site-local address. IPv6 routers
can not transmit data packets that use link-local unicast address
as source or destination address to other links.
Format of site-local unicast address is shown in
T 5 SITE-LOCAL UNICAST ADDRESS FORMAT
ABLE
10 bits
1111111010
The high 96 bits of IPv4-compatible IPv6 address are all 0. The
low 32 bits are IPv4 addresses. Its format is 0:0:0:0:0:0:A.B.C.D
or ::A.B.C.D.
IPv4-compatible IPv6 address is allocated to nodes which support
IPv4 and IPv6 double protocol stacks.
The whole IPv4-compatible IPv6 address is used as the node IPv6
address. The IPv4 address of low 32 bits is used as the node IPv4
address.
Format of this type of address is shown in
T 6 FORMAT OF IPV6 ADDRESS COMPATIBLE WITH IPV4
ABLE
ADDRESS
96 bits
0000...0000

Anycast Address

Anycast addresses can be allocated to interfaces of multiple nodes.
These nodes provide the same services. Packets that use anycast
address as destination address are transmitted to the nearest in-
terface with this address. Whether the interface is the nearest or
not is measured in distance calculation of routing protocol.
Anycast address is allocated from unicast address space. It can
use any unicast address format. It is unable to distinguish any-
cast address and unicast address by the appearances. If a unicast
address is allocated to more than one interfaces, it becomes an
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 1 IPv6 Address Configuration
4.
38 bits 16bits
0 Subnet ID
54 bits
0
64 bits
Interface ID
Table 5.
64 bits
Interface ID
Table 6.
32 bits
IPv4 Address
5