Chapter 1 IPv6 Address Configuration
An IPv6 host has many IPv6 addresses even if it has only one single interface. An
IPv6 host can have the following unicast addresses simultaneously.
à
The link-local address of each interface
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The unicast address of each interface, which can be a site-local address or one
or more aggregable global addresses
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Loopback address (::1) of a loopback interface
In addition, each host must always keep receiving the data from the following multicast
addresses.
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Multicast addresses (FF01::1) of all the nodes within the node-local range
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Multicast addresses (FF02::1) of all the nodes within the link-local range
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Multicast address of the solicited-node (if the solicited-node group is added to an
interface of the host)
à
Multicast address of a multicast group (if any multicast group is added to an
interface of the host)
l
IPv6 Router Address
The following unicast addresses can be allocated to an IPv6 router:
à
Link-local address of each interface
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Unicast address of each interface, which can be a site-local address or one or
more aggregable global addresses
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Subnet-router anycast address
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Other anycast addresses (optional)
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Loopback address (::1) of a loopback interface
Similarly, apart from these addresses, a router must always keep listening to the data
flow from the following multicast addresses.
à
Multicast addresses (FF01::1) of all the nodes within the node-local range
à
Multicast addresses (FF02::1) of all the nodes within the link-local range
à
Multicast addresses (FF02::2) of all the routers within the link-local range
à
Multicast addresses (FF05::2) of all the routers within the site-local range
à
Multicast address of the solicited-node (if the solicited-node group is added to an
interface of the router)
à
Multicast address of a multicast group (if any multicast group is added to an
interface of the router)
IPv6 Address Auto Configuration Technology
The state auto configuration employs the plug-and-play mode to insert a node into the
IPv6 network and starts it up without any manual interference. IPv6 has two different
mechanisms to shore up the plug-and-play network connection:
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