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Unified Services Router User Manual
36
gateway can be either stateless or stateful. If a stateful client is selected the gateway
will connect to the ISP‘s DHCPv6 server for a leased address. For stateless DHCP
there need not be a DHCPv6 server available at the ISP, rather ICMPv6 discover
messages will originate from this gateway and will be used for auto configuration. A
third option to specify the IP address and prefix length of a preferred DHCPv6
server is available as well.
Figure 17: IPv6 WAN Setup page
Prefix Delegation: Select this option to request router advertisement prefix from any
available DHCPv6 servers available on the ISP, the obtained prefix is updated to the
advertised prefixes on the LAN side. This option can be selected only in Statesless
Address Auto Configuration mode of DHCPv6 Client.