RV220W - Trying to setup an IPv6 connection

[panos.asproulis]

Hi,

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:

http://ipv6.otenet.gr/current-config.txt

The main point on this configuration is a PPPoE connection with:

interface Dialer46
 ipv6 address autoconfig default
 ipv6 enable
 ipv6 dhcp client pd LAN_DHCP

interface Vlan1
 description local LAN
 ipv6 address LAN_DHCP ::/64 eui-64
 ipv6 enable
 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.

Router Advertisement: Status: Enable, Advertise Mode: Unsolicited Multicast

When I check the Summary page I see that although a have a proper working IPv4 connection, the IPv6 information is the following:

WAN (Internet) Information (IPv6)

Connection Time:                0 Days 00:07:10

Connection Type:                Dynamic IP (DHCP)

Connection State:               Connected                                  

IP Address:                        fe80::5a8d:9ff:fee2:f9d3/64

Gateway:                           fe80::200:ff:fe00:0

DNS Servers:

which is of course wrong.

Could someone please help me to configure this router according the Cisco IOS configuration file I linked on the top in order to have a working IPv6 connection?

[panos.asproulis]

At least, does anyone know if this router supports a dual stack DHCPv6 Prefix Delegation connection? Can anyone please tell me how to open a support ticket to Cisco regarding this issue?

[mpyhala · Accepted solution]

Hi Panos,

Thank you for posting. You can find a contact number for Cisco Small Business Support at the following page:

http://www.cisco.com/go/sbsc

You will need a Cisco User ID (your login name) and the serial number of your router to open a case.

[panos.asproulis]

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 1.0.3.5 and as a result in practice it is only good for tunnel IPv6 connections.

Are there any plans to provide support for Prefix Delegation?

[panos.asproulis]

This is a quick message to let anyone interested that the latest beta firmware 1.0.4.6 still does not support DHCPv6 Prefix Delegation.

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