Are multiple PDs (IPv6 /64s) possible?



  • Rogers has started handing out IPv6 via DHCP. I'm getting a /128 for the WAN and a /64 for my primary LAN and it works fine. However, attempts to get a /62, /60, etc, etc. all fail. I'm looking for a /64 for my second LAN.

    I'm told that Rogers will only provide /64s, but it may be possible to obtain more than one.

    Is this possible with pfSense? Any hints, help, or suggestions?

    Thanks!



  • You'll need an additional NIC plugged into your cable modem in that case, as it'll have to issue a DHCP6 request from another interface. You're probably limited to a single IPv4 IP, so need to set the second to IPv4 "none".



  • @cmb:

    You'll need an additional NIC plugged into your cable modem in that case, as it'll have to issue a DHCP6 request from another interface. You're probably limited to a single IPv4 IP, so need to set the second to IPv4 "none".

    Would that even work? I was under the impression that the DUID for DHCPv6 should be the same for a whole system, regardless of what interface is used to make the request. If the same DUID is presented on a different interface, wouldn't it just receive the same address/prefix and change the ISP's routing to go to the new interface instead?

    https://tools.ietf.org/html/rfc3315#page-19
    The DUID is
      designed to be unique across all DHCP clients and servers, and stable
      for any specific client or server - that is, the DUID used by a
      client or server SHOULD NOT change over time if at all possible; for
      example, a device's DUID should not change as a result of a change in
      the device's network hardware.



  • Ah, yeah you might be right. It depends on the behavior of the provider in that case. It's worth a shot, but take care since it might well break everything. :)



  • Thanks for the info – much appreciated!


Log in to reply