36
manually to
separate one
site to the other.
Unlike
link-local addresses, site- local
addresses are not assigned automatically.
It needs to be configured manually of by
autoconfiguration. Autoconfiguration will be explained later on in this chapter.
2.4.3.2.1.4 Special Addresses
There are two different types of IPv6 special addresses:
1. Unspecified addresses. This is similar to IPv4’s 0.0.0.0. In IPv6 it is represented as
0:0:0:0:0:0:0:0 or ::
2. Loopback address. IPv4 uses 127.0.0.1, whereas IPv6 uses 0:0:0:0:0:0:0:1 or ::1
2.4.3.2.1.5 Compatibility
Addresses
Compatibility addresses are aimed to suppport migration from IPv4 to IPv6. These
compatibility addresses use both types of hosts in terms of IPv4 and IPv6.
They are
defined as the
followings:
2.4.3.2.1.5.1 IPv4-compatible Addresses
The IPv4-compatible address, 0:0:0:0:0:0 :w.x.y.z or ::w.x.y.z (where w.x.y.z is the dotted
decimal representation of a public IPv4 address), is used by IPv6/IPv4 nodes that are
communicating
with
IPv6
over
an
IPv4
infrastructure
that
uses
public
IPv4
addresses,
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