TABLE OF CONTENTS In contrast to IPv4 where a host with a single network adapter has a single IPv4 address assigned to that adapter, an IPv6 host (e.g., a SIP proxy, a VSAT station) typically has multiple IPv6 addresses (even in the case of a single interface). (When a computer is configured with more than one IP address, it is referred to as a multihomed system.) IPv6 host and router address usage is as follows [MSD200401]:
Host: Typical IPv6 hosts are logically multihomed because they have at least two addresses with which they can receive PDUs. Each host is assigned the following unicast addresses:
A link-local address for each interface. This address is used for local traffic.
An address for each interface. This could be one or more global addresses.
The loopback address (::1) for the loopback interface.
Additionally, each host is listening for traffic on the following multicast addresses:
The node-local scope all-nodes address (FF01::1)
The link-local scope all-nodes address (FF02::1)
The solicited-node address for each unicast address on each interface
The multicast addresses of joined groups on each interface
Router: An IPv6 router is assigned the following unicast addresses:
A link-local address for each interface. This address is used for local traffic.
An address for each interface. This could be one or more global addresses.
The loopback address (::1) for the loopback interface
An IPv6 router is assigned the following anycast addresses:
A subnet-router anycast address for each subnet
Additional anycast addresses...
