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    Unifi AP Pro DHCP issue

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    • brianlittlejohnB
      brianlittlejohn
      last edited by

      Yes, They power on, the show up on the controller with a default 192.168.1.20 address. When I go to adopt it, it starts trying then says adoption failed. I'm guessing it is a DHCP issue, but it may not be...

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      • brianlittlejohnB
        brianlittlejohn
        last edited by brianlittlejohn

        They will adopt if I change the controller to an IP in that network(192.168.1.0/24), but it doesn't do any good for me since it is not in my IP scheme.

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        • DashrenderD
          Dashrender
          last edited by

          Are these new AP's?

          getting that 192 address seems like maybe they are hard coded.

          Try resetting the APs

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          • brianlittlejohnB
            brianlittlejohn @Dashrender
            last edited by

            @Dashrender New APs, the 192 address is what ubiquiti says they will default to when it doesnt get a dhcp. I have reset the device, also used a temp controller on 192 network to upgrade firmware as well... just at a loss at what could be happening...

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            • brianlittlejohnB
              brianlittlejohn
              last edited by

              Well, I got it adopted. Still don't know why the AP won't receive a DHCP address. Clients that connect to it will so not sure where the problem is...

              Here is how I got it to work:

              1. I ssh'ed in to the AP on the 192.168.1.20 address.

              2. Edit the following file: /etc/udhcpc/udhcpc

                UDHCPC_FALLBACK_IP="AVAILABLE_IP_ON_NETWORK"

                once file is saved, it will auto change the ip to the one specified in the config file.

              3. Open Unifi Controller, it will show the AP as managed by another controller, force adopt it, then once adopted go in and set the static IP.

              I'm not sure if this will survive a firmware upgrade, i'll have to wait and see...

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              • JaredBuschJ
                JaredBusch
                last edited by

                You have something else going on.

                Do you have VLAN in use?

                Do you have a DHCP server on VLAN1 (ie untagged).

                brianlittlejohnB 1 Reply Last reply Reply Quote 1
                • brianlittlejohnB
                  brianlittlejohn @JaredBusch
                  last edited by

                  @JaredBusch I know I have something else going on, there is a dhcp server on vlan1 untagged, everything else gets an IP from it. Things connected to the AP get an IP from it... I did read about some issues with unifi AP and Cisco switches... I do have a cisco switch it runs through before hitting the dhcp server...

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                  • JaredBuschJ
                    JaredBusch
                    last edited by

                    Ah, well in that case, you are stuck in the hard place of watching the packet logs during the dhcp request.

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                    • brianlittlejohnB
                      brianlittlejohn
                      last edited by

                      It's the weirdest thing... i'm sure I'll come across something else that is broken that will finally point me to the problem... just haven't found it yet.

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                      • DashrenderD
                        Dashrender
                        last edited by

                        but you're saying that if you plug a laptop into that same cable it will get a DHCP address?

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                        • brianlittlejohnB
                          brianlittlejohn
                          last edited by

                          correct.

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