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Need Help with IPv6 on Time Warner Cable

BryonAdams

I'm trying to configure IPv6 on Sophos XG connected to a bridged modem. I'm thinking I may have to configure additional settings or may have something misconfigured, but it doesn't look like I'm getting an IPv6 lease from Time Warner. My laptop plugged right into the modem and everything rebooted, I get a link local (begins with fe80:) on my laptop. This would mean Time Warner isn't actually providing me a DHCP lease, correct? If that's the case, I'm guessing that the WAN port won't autoconfigure a similar address.

 

Thanks,

  Bryon



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  • 0

    Hi Bryon

     

    If you are unsure that your WAN link is providing an IPaddress of not, please download Wireshark tool and take the packet capture when you plug the link in. 

    Additionally, also look out for the IPv6 settings on your LAN Card to ensure that it is not set to static IPv6 address.

     

    Please share the results so that we may be able to guide you further.

    Regards,

    Varun 

  • 0 in reply to varunparikh

    Nothing is set static other than the IPv4 address on the LAN interface. The WAN interface shouldn't generate one unless Sophos XG firewall autoconfigures itself with link local addressing (I'm guessing it doesn't). Since I'm getting a link local address with my laptop plugged directly into the modem I'd think Time Warner Cable is not providing IPv6 to me, though I didn't actually think to fire up wireshark. I'll take a look tomorrow with my laptop and see what I can capture.

  • +1

    Howdy,

    TWC uses DHCPv6 Prefix Delegation to assign customers IPv6 prefixes. As of SFOS 16.05.0, DHCPv6 Prefix Delegation still isn't supported.

  • 0 in reply to ChrisKnight

    Thanks Chris! I recently learned from Time Warner's tier 3 that there is conflicting information on their site regarding IPv6 availability anyway, in that it may or may not work for many residential areas. I had installed pfSense to see if it resolved it but I don't always get an IPv6 lease when my firewall asks for it. I think I might do a fresh install of Sophos XG anyway to try and resolve a different trouble where the interfaces would only come up at 10 full when set to auto auto. I'll make a different post for that if I still have problems.