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    DHCPv6 across VLANs

    IPv6
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    • S
      slacker9876 last edited by

      Hi all,

      I've a challenge I've been struggling to overcome with little success to this point. I have just turned up IPv6 and received a /57 from my provider. Both the WAN and LAN interfaces are able to obtain addressing from the ISP. I have configured prefix delegation and router advertisements for the LAN interface (/64) and it works great in LAN clients obtain automatic addressing from the pfSense DHCPv6 server. RA is set for Assisted and my subnets defined as 2605:6001:e70e:2200::/64. The LAN interface itself set to track interface for WAN.

      The problem is that none of the clients in my defined VLANs are receiving DHCPv6 addressing. I do understand that VLANs are individual broadcast domains and that these broadcasts do not transit to other networks by design. However, without a DHCPv6 Relay or the ability to assign a static address within the scope (/57) how do I get an IPv6 address for each of the networks and pass DHCPv6 to and from the VLANs to this single DHCPv server?

      I am sure I am missing some piece of the informaiton pie that I am not aware of, but this is my first foray in to IPv6.

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      • johnpoz
        johnpoz LAYER 8 Global Moderator last edited by

        /57 seems like an odd prefix

        Normally you would set your other lan interfaces/vlans to just a different prefix in their track.. So for example use prefix ID 0 on your lan, you would use prefix ID 1, ID 2, etc for your other interfaces.

        Did they assign you a static /57??  If so you could always just create static /64's on your other interfaces vs using track.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
        If you get confused: Listen to the Music Play
        Please don't Chat/PM me for help, unless mod related
        2440 2.4.5p1 | 2x 3100 2.4.4p3 | 2x 3100 22.01 | 4860 22.01

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        • JKnott
          JKnott last edited by

          /57 seems like an odd prefix

          My ISP will soon be letting customers choose any prefix, from /64 to /56.

          PfSense running on Qotom mini PC
          i5 CPU, 4 GB memory, 64 GB SSD & 4 Intel Gb Ethernet ports.
          UniFi AC-Lite access point

          I haven't lost my mind. It's around here...somewhere...

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          • S
            slacker9876 last edited by

            @johnpoz:

            So for example use prefix ID 0 on your lan, you would use prefix ID 1, ID 2, etc for your other interfaces.

            EXACTLY, the help I needed. Thank you John!

            Yes a /57 seemed really odd to me as well, even though this is my first IPv6 net. I removed all configuration and proceeded with the prefix ID's and rebooted. Now I've received a /64 for each VLAN and am able to configure DHCPv6 for each VLAN.

            Time to dig in to TCP/IP bible and learn each setting today. I knew I was missing something simple.

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            • johnpoz
              johnpoz LAYER 8 Global Moderator last edited by

              if you want to learn some ipv6 stuff, head over to hurricane electric and take their certification test.  Its a learning progressive thing, some things you have to do like run web server, email server on your ipv6, etc.  Once you get to sage you can get a free t-shirt ;)

              https://ipv6.he.net/certification/

              I love sporting my sage shirt at techie gatherings.

              An intelligent man is sometimes forced to be drunk to spend time with his fools
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              2440 2.4.5p1 | 2x 3100 2.4.4p3 | 2x 3100 22.01 | 4860 22.01

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              • JKnott
                JKnott last edited by

                Another good source of info is "IPv6 Essentials".
                http://shop.oreilly.com/product/0636920023432.do

                PfSense running on Qotom mini PC
                i5 CPU, 4 GB memory, 64 GB SSD & 4 Intel Gb Ethernet ports.
                UniFi AC-Lite access point

                I haven't lost my mind. It's around here...somewhere...

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