WAN IPv6 Prefix Delegation doesn't work

I bought recently a new FVS328Gv2 as replacment for an older D-Link DIR-825. The FVS318Gv2 is connected to an AVM Fritz!Box 6490 which is the internet access router of my provider. The Fritz!Box 6490...

Installation

IPV6

Prefix Delegation

wan

AndiRauchhaus
Jan 08, 2017
Hi DaneA, dear community,

here some more update acc. to IPv6 prefix delegation on WAN side. The last problem I was struggeling around was, that I used a VLAN configuration on my FVS318Gv2 which was not compatible with IPv6 prefix delegation. I had some more disscusions with the help of NETGEAR support and figured out that delegated IPv6 prefixes are alway attached to VLAN1 the default VLAN.

I got the following advise from the support:

So if you are using prefix delegation, you accept that the subnet associated with the particoular hosts is always the same (and it should not be if you are using different VLANs). In our case, RADVD (Router Advertisement Daemon) is making the choice for us and it picks automatically VLAN 1 when he try to assign an IPv6 address to the clients. This done according to the standards that define RADVD.

So folks that all for this topic.

Which you you a pleasant new year.

Regards
Andreas

AndiRauchhaus

Aspirant

Dec 21, 2016

Ups found I a typo in my post.

This post relates to the Netgear FVS318Gv2 not FVS328Gv2 as I wrote in the text.

Sorry for that.

DaneA
NETGEAR Employee Retired
Dec 21, 2016
Hi AndiRauchhaus,

Were you able to access the article I've shared? Hope it helped.

Regards,

DaneA
NETGEAR Community Team
- AndiRauchhaus
  Aspirant
  Dec 21, 2016
  Yes I was able to access your document. And I tried to follow precisly the the steps descibed.
  
  1. Frist I did a factory reset of my FVS318Gv2 to remove my old setup.
  2. Tested the IPv6 connectivity directly when connected on my Fritzbox 6490.
      Result was all Ok with a score of 10/10 point. So all is well on my Fritzbox side.
  3. Activated IPv4/IPv6 mode on the FVS318Gv2.
      Result was a reboot as expected. So this step was OK.
  4. Selected DHVPv6 on WAN settings with stateless autoconfiguration and prefix delegation as described by the document.
      I got the same result as descibed above in my post. The WAN connection stayed on 'connecting ...'
  
  FVS318Gv2> show net wan wan ipv6 status Broadband
  
  IPv6 WAN1 Status
  ________________
  
  IPv6 Connection Type: Dynamic IPv6 (DHCP)
  IPv6 Connection State: Connecting...
  IPv6 Address: <IPv6 Prefix of ISP>:b27f:b9ff:fecc:9f81/64
  Default IPv6 Gateway: fe80::<IPv6 interface ID of Fritz!Box>
  Primary DNS Server:
  Secondary DNS Server:
  
      **** IPv6 prefix delegation stil does not work ****
  
  I don't know what's wrong. Try now to us the FVS318Gv2 in IPv4 mode only.
  
  Are there any more experiences in connecting a FVS318Gv2 to a Fritzbox out there?
  
  Here is my setup:
  
  ISP <----> Fritzbox 6490 <----> FVS318Gv2
  
  This line works fine on IPv4.
  IPv6 is fine on the Fritzbox 6490 side but FVS318Gv2 does not get a IPv6 prefix delegation. Of course the Fritzbox 6490 is setup correctly as described by AVM to provide a second router. This worked well with my older DIR-825.
  - DaneA
    NETGEAR Employee Retired
    Dec 21, 2016
    Hi AndiRauchhaus,
    
    Kindly try this. Access the web-GUI of the FVS318Gv2 then go to Network Configuration > WAN Settings > 6 to 4 Tunneling. Check the box that says Enable Automatic Tunneling then click Apply.
    
    Let us know the result.
    
    Regards,
    
    DaneA
    NETGEAR Community Team