My ISP provides IPv6 connectivity in the form of dual stack IPv4/IPv6 with DHCPv6 Prefix Delegation. Using a Cisco IOS-based router I managed to make such a connection by using as a template the Cisco IOS configuration file that my ISP has posted as an example in the following link:
description local LAN
ipv6 address LAN_DHCP ::/64 eui-64
ipv6 nd other-config-flag
ipv6 dhcp server LAN_DHCP
I am now trying to configure an RV220W router on the same network but I cannot make it establish an IPv6 connection. Perhaps I am not setting it up correctly to make it work similarly to the Cisco IOS-based router. My settings are the following:
Networking -> IPv6 ->
IP Mode - IPv4 and IPv6 Dual-Stack
IPv6 WAN - DHCPv6 + Stateless Address Auto Configuration
IPv6 LAN - IPv6 Address: fec0::1, IPv6 Prefix Length: 64, DHCP Status: Enable DHCPv6 Server, DHCP Mode: Stateless, DNS Servers: Use DNS from ISP.
So, I did a WAN packet capture to see that type of DHCPv6 packets the router sends to the ISP in order to obtain an IPv6 address and I saw that the router is sending DHCPv6 solicitation packets of type IA_NA i.e. for Identity Association for Non-temporary Address. However, most ISPs that offer a dual stack IP4/IPv6 service, they use DHCPv6 Prefix Delegation in which case the router is expected to send DHCPv6 solicitation packets of type IA_PD i.e. for Identity Association for Prefix Delegation.
Therefore, this router does not support DHCPv6 Prefix Delegation services with firmware 18.104.22.168 and as a result in practice it is only good for tunnel IPv6 connections.
Are there any plans to provide support for Prefix Delegation?
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