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    Help: Frequent DHCP disconnects

    Scheduled Pinned Locked Moved DHCP and DNS
    13 Posts 3 Posters 2.4k Views
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    • C Offline
      cmb
      last edited by

      That has nothing to do with the leases contents. The fact it's there multiple times is a symptom of the problem with the client, or the network in between, nothing to do with the cause.

      The client either isn't getting the response from the server, or it's refusing it for some reason, and re-issuing the request. Look at the client, that's where the issue resides.

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      • johnpozJ Offline
        johnpoz LAYER 8 Global Moderator
        last edited by

        "Looks like it's sending a discover request two times because of the double lease"

        No that is NOT how it works!!!  As cmb stated the issue is on your CLIENT!!

        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 25.07.1 | Lab VMs 2.8.1, 25.07.1

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        • I Offline
          Isegrim
          last edited by

          How can it be the client? Setting it to a static ip is the only change i can make on the client side. The only thing between client and server is a unmanaged switch.

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          • C Offline
            cmb
            last edited by

            Only the client controls whether and when it sends a DHCPDISCOVER. Either the offer isn't getting back to the client (network in between somewhere is dropping it) or the client is refusing the lease.

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            • I Offline
              Isegrim
              last edited by

              I guess it's not an dhcp issue after all. Got this today : "a lan cable is not connected".  My wan seems to drop the connection every couple of hours.

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              • johnpozJ Offline
                johnpoz LAYER 8 Global Moderator
                last edited by

                what would your pfsense wan have to do with a client sending multiple discovers?

                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 25.07.1 | Lab VMs 2.8.1, 25.07.1

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                • I Offline
                  Isegrim
                  last edited by

                  @johnpoz:

                  what would your pfsense wan have to do with a client sending multiple discovers?

                  I don't know. The client i mentioned seems to send a discover each time the drop happens, while my pc gives me a dns error for a couple of seconds.

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                  • I Offline
                    Isegrim
                    last edited by

                    Is there no body that can help me with this? A dropping internet connection is the worst.

                    Before anyone says it's the client. I did hook up my old  linksys e4200 and did work normally over the weekend.

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                    • C Offline
                      cmb
                      last edited by

                      @Isegrim:

                      I guess it's not an dhcp issue after all. Got this today : "a lan cable is not connected".  My wan seems to drop the connection every couple of hours.

                      That would explain why it's grabbing another lease, it's losing link to the switch it's plugged into. When it re-gains link, it'll request another DHCP lease. That has nothing to do with your WAN connection, and nothing you've shown indicates your WAN is dropping.

                      When you switched to the Linksys I'm guessing you changed switches as well, or changed something else about where that client machine's plugged in.

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                      • I Offline
                        Isegrim
                        last edited by

                        That would explain why it's grabbing another lease, it's losing link to the switch it's plugged into. When it re-gains link, it'll request another DHCP lease. That has nothing to do with your WAN connection, and nothing you've shown indicates your WAN is dropping.

                        When you switched to the Linksys I'm guessing you changed switches as well, or changed something else about where that client machine's plugged in.

                        Yes.
                        Before: Pfsense > switch 1 > switch 2 > work pc / console & TV | pfsense > switch 1 > a tv and a couple of other entertainment devices.
                        After: Linksys > switch 1 > work pc / console & TV. Everything else is connected wirelessly in this setup.
                        i'll get another switch and see if that fixes my issues.

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