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    Network routing question

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    fedora 30 network routing dns
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    • FATeknollogeeF
      FATeknollogee @Dashrender
      last edited by FATeknollogee

      @Dashrender said in Network routing question:

      I see these two IPv4 networks
      10.250.251.242/22 brd 10.250.251.255
      10.50.235.12/24 brd 10.50.235.255

      Assuming you want to reach 10.50.235.200 for DNS, do you have that address setup as a DNS server?

      Also, if you have multiple DNS server setup, it will use the first one until it fails, then it will failover to #2 in the list, etc. so you can't simply list multiple DNS server and expect them all to be used.

      Can you ping the IP of the client you want to connect to by IP?

      DNS server is at 10.50.235.235
      Yes, I can ping the DNS Server and the clients on the 10.50 network by IP address but not by name.
      If I disable the 10.250 network, then I can ping & reach the clients by name.

      dafyreD 1 Reply Last reply Reply Quote 0
      • dafyreD
        dafyre @FATeknollogee
        last edited by

        @FATeknollogee said in Network routing question:

        @Dashrender said in Network routing question:

        I see these two IPv4 networks
        10.250.251.242/22 brd 10.250.251.255
        10.50.235.12/24 brd 10.50.235.255

        Assuming you want to reach 10.50.235.200 for DNS, do you have that address setup as a DNS server?

        Also, if you have multiple DNS server setup, it will use the first one until it fails, then it will failover to #2 in the list, etc. so you can't simply list multiple DNS server and expect them all to be used.

        Can you ping the IP of the client you want to connect to by IP?

        DNS server is at 10.50.235.235
        Yes, I can ping the DNS Server and the clients on the 10.50 network by IP address but not by name.
        If I disable the 10.250 network, then I can ping & reach the clients by name.

        What is your machine set to use for DNS server right now?

        FATeknollogeeF dafyreD 2 Replies Last reply Reply Quote 1
        • FATeknollogeeF
          FATeknollogee @dafyre
          last edited by

          @dafyre said in Network routing question:

          What is your machine set to use for DNS server right now?

          It gets it's DNS settings from the DHCP server.
          10.250.250.254
          10.50.235.235

          KellyK 1 Reply Last reply Reply Quote 0
          • KellyK
            Kelly @FATeknollogee
            last edited by

            @FATeknollogee said in Network routing question:

            @dafyre said in Network routing question:

            What is your machine set to use for DNS server right now?

            It gets it's DNS settings from the DHCP server.
            10.250.250.254
            10.50.235.235

            Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

            FATeknollogeeF 1 Reply Last reply Reply Quote 0
            • FATeknollogeeF
              FATeknollogee @Kelly
              last edited by

              @Kelly said in Network routing question:

              @FATeknollogee said in Network routing question:

              Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

              No, 250.254 doesn't have a DNS server, just services provided by the dhcp router.

              KellyK 1 Reply Last reply Reply Quote 0
              • KellyK
                Kelly @FATeknollogee
                last edited by

                @FATeknollogee said in Network routing question:

                @Kelly said in Network routing question:

                @FATeknollogee said in Network routing question:

                Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

                No, 250.254 doesn't have a DNS server, just services provided by the dhcp router.

                I am confused. Either way, does the DNS server in the subnet where your DNS service is working have the DNS server for the non functioning subnet in its upstream list or a secondary zone for that subnet?

                FATeknollogeeF 1 Reply Last reply Reply Quote 0
                • FATeknollogeeF
                  FATeknollogee @Kelly
                  last edited by

                  @Kelly said in Network routing question:

                  @FATeknollogee said in Network routing question:

                  @Kelly said in Network routing question:

                  @FATeknollogee said in Network routing question:

                  Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

                  No, 250.254 doesn't have a DNS server, just services provided by the dhcp router.

                  I am confused. Either way, does the DNS server in the subnet where your DNS service is working have the DNS server for the non functioning subnet in its upstream list or a secondary zone for that subnet?

                  250.254 is my Meraki router (so no "standalone" DNS server)
                  Not sure if I can add a secondary zone

                  KellyK 1 Reply Last reply Reply Quote 0
                  • KellyK
                    Kelly @FATeknollogee
                    last edited by

                    @FATeknollogee said in Network routing question:

                    @Kelly said in Network routing question:

                    @FATeknollogee said in Network routing question:

                    @Kelly said in Network routing question:

                    @FATeknollogee said in Network routing question:

                    Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

                    No, 250.254 doesn't have a DNS server, just services provided by the dhcp router.

                    I am confused. Either way, does the DNS server in the subnet where your DNS service is working have the DNS server for the non functioning subnet in its upstream list or a secondary zone for that subnet?

                    250.254 is my Meraki router (so no "standalone" DNS server)
                    Not sure if I can add a secondary zone

                    You can use an IP helper for a Meraki: https://documentation.meraki.com/MX/DHCP/Configuring_DHCP_Relay.

                    FATeknollogeeF 1 Reply Last reply Reply Quote 0
                    • dafyreD
                      dafyre @dafyre
                      last edited by

                      @dafyre said in Network routing question:

                      DNS server is at 10.50.235.235

                      Configure your computer to look to 235.235 for DNS... and configure the DNS server at 235.235 to forward anything it doesn't recognize along to your Meraki?

                      FATeknollogeeF 1 Reply Last reply Reply Quote 0
                      • FATeknollogeeF
                        FATeknollogee @Kelly
                        last edited by

                        @Kelly said in Network routing question:

                        @FATeknollogee said in Network routing question:

                        @Kelly said in Network routing question:

                        @FATeknollogee said in Network routing question:

                        @Kelly said in Network routing question:

                        @FATeknollogee said in Network routing question:

                        Does 250.254 have 235.235 in its upstream list or have a secondary zone for 235.x?

                        No, 250.254 doesn't have a DNS server, just services provided by the dhcp router.

                        I am confused. Either way, does the DNS server in the subnet where your DNS service is working have the DNS server for the non functioning subnet in its upstream list or a secondary zone for that subnet?

                        250.254 is my Meraki router (so no "standalone" DNS server)
                        Not sure if I can add a secondary zone

                        You can use an IP helper for a Meraki: https://documentation.meraki.com/MX/DHCP/Configuring_DHCP_Relay.

                        Unfortunately, no MX, I got rid of my MX84.
                        DHCP is handled by Meraki MS320-24 Layer 3 switch

                        1 Reply Last reply Reply Quote 0
                        • 1
                          1337
                          last edited by

                          Why are you discussing DNS? Routing has nothing to do with DNS. DNS is for resolving names.

                          FATeknollogeeF 1 Reply Last reply Reply Quote 0
                          • FATeknollogeeF
                            FATeknollogee @1337
                            last edited by

                            @Pete-S said in Network routing question:

                            Why are you discussing DNS? Routing has nothing to do with DNS. DNS is for resolving names.

                            Because I want to access the resources via name resolution (you gotta read my OP)

                            1 Reply Last reply Reply Quote 0
                            • KellyK
                              Kelly
                              last edited by

                              Looks like the MS series supports the DHCP relay setting: https://community.meraki.com/t5/Switching/need-to-configure-DHCP-IP-helper-address-on-VLAN-in-MS-switch/td-p/22806.

                              FATeknollogeeF 1 Reply Last reply Reply Quote 0
                              • FATeknollogeeF
                                FATeknollogee @Kelly
                                last edited by

                                @Kelly said in Network routing question:

                                Looks like the MS series supports the DHCP relay setting: https://community.meraki.com/t5/Switching/need-to-configure-DHCP-IP-helper-address-on-VLAN-in-MS-switch/td-p/22806.

                                I can't use that relay setting since I still need dhcp on the 250.254 network

                                KellyK 1 Reply Last reply Reply Quote 0
                                • KellyK
                                  Kelly @FATeknollogee
                                  last edited by

                                  @FATeknollogee said in Network routing question:

                                  @Kelly said in Network routing question:

                                  Looks like the MS series supports the DHCP relay setting: https://community.meraki.com/t5/Switching/need-to-configure-DHCP-IP-helper-address-on-VLAN-in-MS-switch/td-p/22806.

                                  I can't use that relay setting since I still need dhcp on the 250.254 network

                                  If you're using some automation you could push the resolution for specific targets to the hosts file on the end points.

                                  1 Reply Last reply Reply Quote 1
                                  • FATeknollogeeF
                                    FATeknollogee @dafyre
                                    last edited by

                                    @dafyre said in Network routing question:

                                    @dafyre said in Network routing question:

                                    DNS server is at 10.50.235.235

                                    Configure your computer to look to 235.235 for DNS... and configure the DNS server at 235.235 to forward anything it doesn't recognize along to your Meraki?

                                    I added 235.235 as an additional DNS in the 250.254 network.

                                    I tried this yesterday but silly me forgot to "refresh" the NIC so it could grab the new settings.

                                    All is good & working.

                                    1 Reply Last reply Reply Quote 1
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