Kofax Communication Server 9.1.1 - Manual (Page 58)

Environment Guide Version 3.00.04
58 © Copyright Kofax, Inc. All information is subject to change without notice.
6.2.2 IPv6 Address Types
There are three types of IPv6 addresses: unicast, multicast and anycast.
Unicast IPv6 address is an address for a single interface.
Multicast IPv6 address is an address for a set of interfaces and a packet sent to such an address will be
delivered to all interfaces identified by this address.
Anycast IPv6 address is also an address for a set of interfaces, but a packet sent to such an address is
delivered to one of these interfaces.
6.2.3 IPv6 Address Scope
IPv6 addresses have a scope which defines a network area over which they are defined and relevant.
There are following main address scopes for unicast addresses (which are of the main KCS interest):
Name Scope Identified by Example
Global Address Global First three bits equal to
001 2001:db8:a3::1:2345:1234
Unique Local
Address Site-Local Start with the prefix
fd00::/8 fd96:eb5f:7508:5760:204:23ff:feac:4172
Site-Local
Address Site-Local Start with the prefix
fec0::/10 fec0:eb5f:7508:5760:204:23ff:feac:4172
Link-Local
Address On-Link
Neighbors Prefix fe80::/64 fe80::204:23ff:feac:4172
6.2.4 Special IPv6 Addresses
Address Purpose
::0/128 Address with all zero bits is called “unspecified address” (corresponds to 0.0.0.0 in IPv4)
::1/128 Loopback address (corresponds to 127.0.0.1 in IPv4)
6.2.5 IPv6 Address and the Port Number
IPv6 uses the same concept of ports as IPv4 does, including the same well-known ports, but if writing IPv6
address and the port number in one string, it is necessary to quote the address with “[]” brackets like here:
[2001:db8:a3::1]:443
“[]” brackets must be also used when writing an IPv6 address in a URL like here:
http://[2001:db8:a3::1]/index.html
6.2.6 Assignment of IPv6 Addresses
It is possible to assign IPv6 addresses through auto-configuration but also manually. The simplest
automatic approach is so called stateless address configuration where IPv6 hosts can configure themselves
automatically when connected to a network with IPv6 enabled router by the means of the Network
Discovery protocol (ND).
Once connected to the network, the host sends so called link-local multicast router solicitation request and
the router responds with a router advertisement packet which contains a couple of network configuration
parameters, the most important is the address prefix.