Dual WAN IPv6



  • Hallo!

    I use a Dual WAN connection from two ISP. First is Unitymedia (DOCSIS TC4400 cable modem), second Deutsche Telekom (PPPoE Draytek Vigor 130 modem). Both have Dual Stack and provide me a dynamic /56 prefix!

    First things first, my interfaces:

    Anything wrong here? I wonder why my WAN (Unitymedia) gets a fe80 but my WAN_VDSL (DT) gets a global adress. Here are the WAN connections setup (both configured DHCP):

    WAN

    WAN_VDSL

    Here's the LAN interface:

    I've configured both connections as failover with priority to WAN (Unitymedia). On IPv4 side everything works perfect. If one goes down, the default gateway switches and the other connection is used. But on IPv6 side if WAN (Unitymedia) goes down, there is no IPv6 connectivity. If WAN comes up, the IPv6 will work again. If I disable WAN interface and only use WAN_VDSL I have to reboot the pfSense and clients then IPv6 will work.

    I don't know what I'm doing wrong. IPv6 is new to me I know the basics, maybe a bit more than that :)



  • Whether a link local or global address is listed depends on whether a global address has been assigned to an interface.  Go to the command prompt and run ifconfig, to see what IPv6 addresses have been assigned to the interfaces.  Please note, a global address is not needed for a router to work, as the link local address is normally used for routing.  This means that a global address is normally used only for things like testing with ping, traceroute, etc., or possibly management.

    That said, are you getting IPv6 addresses on the local LAN from the WAN provider?  Another thing to keep in mind is that IPv6 supports priority on the default route.  This means that if the 2 interfaces are used, the one with the highest priority will be used, with the 2nd used when the first fails.

    In general, IPv6 works exactly the same way as IPv4, but with larger addresses.  However, there are many things that go to improving performance, such as fixed header length, Neighbour Solicitation, instead of ARP, no broadcasts which have been replaced with all nodes multicast and more.  Perhaps you may want to do a bit of reading about IPv6.



  • Yes the LAN gets an IPv6 too. I think the problem is the Track Interface option. That is set wo WAN, so it can‘t use the WAN_VDSL. In my point of view Multi WAN is impossible with IPv6. Or can I set LAN to assign it‘s IPv6 by DHCP?



  • @mrsunfire:

    Yes the LAN gets an IPv6 too. I think the problem is the Track Interface option. That is set wo WAN, so it can‘t use the WAN_VDSL. In my point of view Multi WAN is impossible with IPv6. Or can I set LAN to assign it‘s IPv6 by DHCP?

    Multi-WAN is possible within the confines of what IPv6 is capable of, just not easily done with pfSense right now.



  • @zer0t3ch said in Dual WAN IPv6:

    @mrsunfire:

    Yes the LAN gets an IPv6 too. I think the problem is the Track Interface option. That is set wo WAN, so it can‘t use the WAN_VDSL. In my point of view Multi WAN is impossible with IPv6. Or can I set LAN to assign it‘s IPv6 by DHCP?

    Multi-WAN is possible within the confines of what IPv6 is capable of, just not easily done with pfSense right now.

    ULA + NPt seems to be about the only (mostly) reliable way to get Multi-WAN IPv6 working, with appropriate caveats.


 

© Copyright 2002 - 2018 Rubicon Communications, LLC | Privacy Policy