HP 635n, Administrator'S Manual

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For example, portions of the IPv6 address space that are reserved are illustrated below:
■
2001:DB8::/32
(reserved for use only as examples in documentation)
■
FE80::/10
(reserved for link-local addresses only)
IPv6 addresses do not use subnet masks as in IPv4 formats. Instead, the prefix length may be used
to specify an entire network/subnet. Or, it may be used to specify the network portion of a complete
host address. For example, in the following host address:
2001:DB8:1234:5678:abcd::ef01/64
/64
is the prefix length and indicates that
2001:DB8:1234:5678
is the network/subnet for the
specific host uniquely identified by
abcd::ef01
.
For a more thorough discussion of IPv6 address formats and types, refer to the Internet Engineering
Task Force (IETF) IPv6 RFCs, or see the documentation supplied with your IPv6–supported system
or router.
IPv6 Address Configuration
While IPv6 addresses are relatively complex, most IPv6 addresses for the print server are
automatically configured in accordance with the IPv6 standards. If necessary, the print server will
allow a manually-configured IPv6 address (for example, through the printer control panel or
embedded Web server). If the print server is enabled for IPv6 operation, all IPv6 addresses that are
automatically configured are active; however, a manually-configured address is disabled by default
and must be manually enabled.
Stateless addresses assigned to the print server are under the control of a router. Stateful addresses
are normally assigned by a DHCPv6 server under the direction of a router; however, the print server
can be configured to always use stateful configuration, or to use stateful configuration if stateless
configuration fails.
Link-Local Address
IPv6 link-local addresses are automatically self-configured and allow IPv6 communications between
hosts connected to the same link (routers do not forward link-local addresses). Because each IPv6
host on a local network will assign itself a link-local address, a router-based infrastucture is not
required.
When the print server creates a link-local address, the link-local prefix
FE80::/10
is combined with
a 64-bit host address (derived from the print server's MAC address) in accordance with a predefined
algorithm.
For example, a print server with MAC address 00–0E-7F-E8–01–DD results in the following link-local
address:
FE80::20e:7FFF:FEE8:1DD
The use of link-local IPv6 addressing is particularly attractive for small, configuration-free networks.
18 Chapter 3 TCP/IP Configuration ENWW