Prefix delegation

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In IPv6 networking, prefix delegation is used to assign a network address prefix to a user site, configuring the user's router with the prefix to be used for each LAN. This is one of the methods for delegating IPv6 address prefixes to an IPv6 subscriber's network (or "site"). It is described by RFC 3769.

With the advent of IPv6 protocol, there is a need for a delegation mechanism which will automate the process of configuring networking equipment with appropriate prefixes at the customer's site.

Though IPv6 enables simple and automatic host configuration it does not provide specification to automatically delegate a prefix to routers. DHCPv6 is used for the automatic configuration of IPv6 nodes. In the DHCPv6 protocol DHCPv6 servers send the network configuration parameters to IPv6 nodes.

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