TCP/IPv6 Configuration and Management Manual (G06.29+, H06.03+, J06.03+)

IPv6 Fundamentals
HP NonStop TCP/IPv6 Configuration and Management Manual—524523-012
A-11
Stateless Address Autoconfiguration
In the address format shown in Figure A-10, the fields have these definitions:

001
The Format Prefix for aggregatable global unicast addresses.

1111111111110
The 6bone Top-Level Aggregation (TLA) Identifier, 0x1FFE, reserved by the
Internet Assigned Numbers Naming Authority (IANA), and used temporarily for
IPv6 testing.

Next-Level Aggregation (NLA) Identifier
The ID assigned by the TLA ID administrator to create an addressing hierarchy
and to identify end user sites on the 6bone network.

Site-Level Aggregation (SLA) Identifier
The ID assigned by an end user site to create its own local addressing hierarchy
and to identify SUBNETs.

Interface ID
The 64-bit interface identifier of the interface that is connected to the link.
For the most recent information about pTLA and pNLA assignments, see the 6bone
home page at this location:
http://www.6bone.net
Stateless Address Autoconfiguration
Stateless address autoconfiguration allows nodes to learn address prefixes by listening
for router advertisement packets. Addresses are formed by combining the prefix with a
datalink-specific interface identifier, which is typically derived from the datalink address
of the interface. This model is favored by administrators who do not need tight control
over address configuration. Combined with the ability to register updated address
Figure A-10. Aggregatable Testing Address Format
0
127
3
bits
VST153.vsd
13
bits
8
bits
32 bits
001
16 bits
64 bits
NLA ID SLA ID Interface ID
1111111111110