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    Solved How long does it take for clients to resolve new IP from DNS on LAN?

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    • 1
      1337
      last edited by 1337

      We have changed an local DNS entry to another ip address. Or actually the customers internal IT has done this.

      How long does it take for users to start using the new ip address?

      • DNS points to a webserver
      • Clients are running Win10 and some Win7
      • Clients are using Chrome .
      • Customer is a Windows shop (mostly) so I think DNS comes from AD?
      ObsolesceO 1 Reply Last reply Reply Quote 0
      • DashrenderD
        Dashrender @1337
        last edited by

        @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

        @Obsolesce said in How long does it take for clients to resolve new IP from DNS on LAN?:

        i thought they default to one day. Just check the DNS server quick to see.

        Can I do that from a client? How?

        try

         ipconfig /displayDNS
        1 Reply Last reply Reply Quote 1
        • DustinB3403D
          DustinB3403
          last edited by

          Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

          1 1 Reply Last reply Reply Quote 1
          • 1
            1337 @DustinB3403
            last edited by 1337

            @DustinB3403 said in How long does it take for clients to resolve new IP from DNS on LAN?:

            Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

            Yes, just internal.

            I read somewhere that TTL on DNS in AD is 7 days or something by default. I have no clue though. Only have a very cursory understanding of how it works.

            dafyreD JaredBuschJ 2 Replies Last reply Reply Quote 0
            • dafyreD
              dafyre @1337
              last edited by dafyre

              @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

              @DustinB3403 said in How long does it take for clients to resolve new IP from DNS on LAN?:

              Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

              Yes, just internal.

              I read somewhere that TTL on DNS in AD is 7 days or something by default. I have no clue though. Only have a very cursory understanding of how it works.

              On the client machines, you can force it by running ipconfig /flushdns -- that should force them to get the most recent DNS changes from AD.

              1 1 Reply Last reply Reply Quote 2
              • JaredBuschJ
                JaredBusch @1337
                last edited by

                @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                I read somewhere that TTL on DNS in AD is 7 days or something by default.

                I do not know either, but this would not surprise me. Windows always does shit stupid.
                /glare default DHCP lease times

                1 Reply Last reply Reply Quote 1
                • 1
                  1337 @dafyre
                  last edited by 1337

                  @dafyre said in How long does it take for clients to resolve new IP from DNS on LAN?:

                  @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                  @DustinB3403 said in How long does it take for clients to resolve new IP from DNS on LAN?:

                  Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

                  Yes, just internal.

                  I read somewhere that TTL on DNS in AD is 7 days or something by default. I have no clue though. Only have a very cursory understanding of how it works.

                  On the client machines, you can force it by running ipconfig /flushdns -- that should force them to get the most recent DNS changes from AD.

                  Thanks, good to know for future reference. Unfortunately in this case there are about 100 to 150 clients and they are out of our reach.

                  dafyreD DashrenderD 2 Replies Last reply Reply Quote 0
                  • dafyreD
                    dafyre @1337
                    last edited by

                    @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                    @dafyre said in How long does it take for clients to resolve new IP from DNS on LAN?:

                    @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                    @DustinB3403 said in How long does it take for clients to resolve new IP from DNS on LAN?:

                    Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

                    Yes, just internal.

                    I read somewhere that TTL on DNS in AD is 7 days or something by default. I have no clue though. Only have a very cursory understanding of how it works.

                    On the client machines, you can force it by running ipconfig /flushdns -- that should force them to get the most recent DNS changes from AD.

                    Thanks, good to know for future reference. Unfortunately in this case there are about 100 to 150 clients and they are out of our reach.

                    Yikes...

                    1 Reply Last reply Reply Quote 1
                    • DashrenderD
                      Dashrender @1337
                      last edited by

                      @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                      @dafyre said in How long does it take for clients to resolve new IP from DNS on LAN?:

                      @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                      @DustinB3403 said in How long does it take for clients to resolve new IP from DNS on LAN?:

                      Assuming they aren't cached, should be just a matter of minutes. This is all internal, correct?

                      Yes, just internal.

                      I read somewhere that TTL on DNS in AD is 7 days or something by default. I have no clue though. Only have a very cursory understanding of how it works.

                      On the client machines, you can force it by running ipconfig /flushdns -- that should force them to get the most recent DNS changes from AD.

                      Thanks, good to know for future reference. Unfortunately in this case there are about 100 to 150 clients and they are out of our reach.

                      Have your client send an email to everyone - to get the new settings - reboot. problem solved.

                      1 Reply Last reply Reply Quote 0
                      • ObsolesceO
                        Obsolesce @1337
                        last edited by Obsolesce

                        @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                        We have changed an local DNS entry to another ip address. Or actually the customers internal IT has done this.

                        How long does it take for users to start using the new ip address?

                        • DNS points to a webserver
                        • Clients are running Win10 and some Win7
                        • Clients are using Chrome
                        • Customer is a Windows shop (mostly) so I think DNS comes from AD?

                        I thought they default to one day hour. Just check the DNS server quick to see.

                        Edit: one hour, not one day.

                        1 1 Reply Last reply Reply Quote 1
                        • 1
                          1337 @Obsolesce
                          last edited by

                          @Obsolesce said in How long does it take for clients to resolve new IP from DNS on LAN?:

                          i thought they default to one day. Just check the DNS server quick to see.

                          Can I do that from a client? How?

                          DashrenderD 1 Reply Last reply Reply Quote 0
                          • DashrenderD
                            Dashrender @1337
                            last edited by

                            @Pete-S said in How long does it take for clients to resolve new IP from DNS on LAN?:

                            @Obsolesce said in How long does it take for clients to resolve new IP from DNS on LAN?:

                            i thought they default to one day. Just check the DNS server quick to see.

                            Can I do that from a client? How?

                            try

                             ipconfig /displayDNS
                            1 Reply Last reply Reply Quote 1
                            • wrx7mW
                              wrx7m
                              last edited by

                              You can use powershell to flush the DNS of remote systems.

                              Invoke-Command -script {Clear-DnsClientCache} -ComputerName Server01

                              If you have access to the DNS servers, you can try clearing the cache of each server.

                              1 Reply Last reply Reply Quote 1
                              • 1
                                1337
                                last edited by

                                @Dashrender I just checked a couple of clients and Time To Live where set to 3600 at most and counting down.

                                @Obsolesce If it's default then one hour it is.

                                1 Reply Last reply Reply Quote 0
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