Netgate Discussion Forum
    • Categories
    • Recent
    • Tags
    • Popular
    • Users
    • Search
    • Register
    • Login

    DHCP Multi VLAN Setup Issues

    Scheduled Pinned Locked Moved DHCP and DNS
    4 Posts 2 Posters 1.2k Views
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • J
      jwmoss
      last edited by

      Hi all. I'm not a network guy by any means, but I'm trying to get my home network setup properly. What I'd like to do is setup DHCP on PfSense for a certain VLAN on my network, my client VLAN, or in this case VLAN 2.

      I've attached a network map to simplify.

      Basically, I'd like to have separate VLANs and interVLAN routing done on the L3 switch and have DHCP running for VLAN 2 from PfSense.

      So far I have All VLANs being able to ping 10.1.1.254, but I can't seem to wrap my head around what's left so that PfSense can do DHCP for the Airport Extreme on VLAN 2.

      What do I need to understand, or do, to accomplish this? Setting DHCP on the Airport Extreme is not possible since it will only do 10.0.1.1-50 range, not 10.1.10.1/24 range that I'd like it to do.
      ![Screen Shot 2014-01-05 at 3.37.45 PM.png](/public/imported_attachments/1/Screen Shot 2014-01-05 at 3.37.45 PM.png)
      ![Screen Shot 2014-01-05 at 3.37.45 PM.png_thumb](/public/imported_attachments/1/Screen Shot 2014-01-05 at 3.37.45 PM.png_thumb)

      1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator
        last edited by

        Pfsense can currently provide dhcp for a network it does not have a interface in.  There are multiple threads about this - work around is to create an interface put it in the network you would like and then down the interface.. Search the forum

        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
        SG-4860 24.11 | Lab VMs 2.8, 24.11

        1 Reply Last reply Reply Quote 0
        • J
          jwmoss
          last edited by

          @johnpoz:

          Pfsense can currently provide dhcp for a network it does not have a interface in.  There are multiple threads about this - work around is to create an interface put it in the network you would like and then down the interface.. Search the forum

          I think I understand what you're saying, but in essence:

          Create an interface on the LAN port of PfSense, 10.1.10.1/24 and then enable DHCP? How will the VLAN traffic know to get its DHCP/DNS configuration from that specific interface on the 10.1.10.1/24 LAN port?

          When I tried this earlier, it overlapped and said it wasn't possible since it overlapped with 10.1.1.254/24 LAN port, but I'm sure it would work if I change the LAN subnet to a /16?

          1 Reply Last reply Reply Quote 0
          • johnpozJ
            johnpoz LAYER 8 Global Moderator
            last edited by

            You need to create a NEW interface, vlan for example. And no there would be no network overlap.

            As to how dhcp clients would know - you would have to setup a ip helper cisco calls it.  Dhcp relay on your switch.

            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
            SG-4860 24.11 | Lab VMs 2.8, 24.11

            1 Reply Last reply Reply Quote 0
            • First post
              Last post
            Copyright 2025 Rubicon Communications LLC (Netgate). All rights reserved.