You assign a subnet ID as part of IPv6 network configuration.
The following example shows the format of the link-local address.
When you enable IPv6 during Solaris installation, the lowest numbered interface on the local machine is configured with a link-local address.
The interface ID is either automatically configured from the interface's MAC address or manually configured in EUI-64 format.
Consider again the address in Figure 3–2: , contain the interface ID.
An IPv6 address is 128 bits in length and consists of eight, 16-bit fields, with each field bounded by a colon.
Each field must contain a hexadecimal number, in contrast to the dotted-decimal notation of IPv4 addresses.
You obtain the site prefix for your enterprise from an ISP or Regional Internet Registry (RIR).
IN IPv6, the subnet ID defines an administrative subnet of the network and is up to 16 bits in length.
For transition purposes, the IPv6 protocol includes the ability to embed an IPv4 address within an IPv6 address.
This type of IPv4 address facilitates the tunneling of IPv6 packets over existing IPv4 networks.