6 Replies Latest reply on Feb 8, 2013 12:41 PM by patrick

    Atlas 550 Default Gateway Conflict

    upacreek New Member

      There are 3 places to set this:

      1) System Config/Ethernet Port: Default Gateway;

      2) Router/IP/Static Routes: Gateway; and

      3) Router/IP/Global: Default Gateway.

       

      Which is the "correct" place?

       

      This seems to matter because, after a reboot, the route table gets (incorrectly) populated with the *wrong* interface name for the default (0.0.0.0 0.0.0.0) route and then becomes unreachable from all but the local LAN. Is there a permanent way to fix this?

       

      Thank you sincerely.

        • Re: Atlas 550 Default Gateway Conflict
          patrick Employee

          First, ensure the FW is up to date and the ATLAS is running C0904 FW.

          The Default Gateway should be configured under the SYSTEM CONFIG in the ETHERNET PORT, which should also populate the "Router/IP/Global: Default Gateway" setting.

          Under "Router/IP/Static Routes" there should be no "all zeros" route listed, as this can cause a default gateway conflict if it does not match what is configured under the Ethernet Port/Global gateway.

           

          If you are using the ATLAS as an IP router, keep in mind that while the ATLAS has routing capabilities it is not a ROUTER, and you will get much better performance from a dedicated router.

           

          Hope this helps,

          Patrick

            • Re: Atlas 550 Default Gateway Conflict
              upacreek New Member

              Patrick,

              Thank you for your kind answer.

               

              But I think we've got a bug here. It doesn't seem to matter where I set the Default Gateway (in 1, 2, or all 3 places).

              After a reboot the routing table goes FROM:

               

                   IP Address        Netmask         Gateway     Interface
                   ----------        -------         -------     ---------
              1  0.0.0.0         0.0.0.0         10.0.0.1          EN0 IP
              2  10.0.0.0        255.255.255.0   10.0.0.55         EN0 IP
              3  10.0.0.55       255.255.255.255 10.0.0.55         Local
              4  10.1.4.0        255.255.255.252 10.1.4.1          Link 1
              5  10.1.4.1        255.255.255.255 10.1.4.1          Local
              6  127.0.0.1       255.255.255.255 127.0.0.1         Local
              7  224.0.0.5       255.255.255.255 224.0.0.5         Local
              8  224.0.0.6       255.255.255.255 224.0.0.6         Local
              9  224.0.0.9       255.255.255.255 224.0.0.9         Local
              10 255.255.255.255 255.255.255.255 10.0.0.55         Local


              TO:

                   IP Address        Netmask         Gateway     Interface
                   ----------        -------         -------     ---------
              1  0.0.0.0         0.0.0.0         10.0.0.1          Link 1
              2  10.0.0.0        255.255.255.0   10.0.0.55         EN0 IP
              3  10.0.0.55       255.255.255.255 10.0.0.55         Local
              4  10.1.4.0        255.255.255.252 10.1.4.1          Link 1
              5  10.1.4.1        255.255.255.255 10.1.4.1          Local
              6  127.0.0.1       255.255.255.255 127.0.0.1         Local
              7  224.0.0.5       255.255.255.255 224.0.0.5         Local
              8  224.0.0.6       255.255.255.255 224.0.0.6         Local
              9  224.0.0.9       255.255.255.255 224.0.0.9         Local
              10 255.255.255.255 255.255.255.255 10.0.0.55         Local


              As you can see, the interface for 10.0.0.1 has been corrupted from "EN0 IP" (correct) to "Link 1" (wrong). Now the 550 is unreachable from anything but a local LAN.

               

              The router should know better than this! What gives? Do you think there's a work-around?

               

              From the System Info screen:
              Firmware Revision        ATLAS 550  Rev. C.09.04 08/24/04 11:06:
              Boot ROM Rev             C.01 06/26/03

               

              Thank you again.

                • Re: Atlas 550 Default Gateway Conflict
                  upacreek New Member

                  Patrick,

                   

                  P.S. As I should have mentioned above, there are NO entries in the static routes table (not that it matters; I've tried this every which way, and it still screws up); and this Atlas 550 is being used primarily as a telephone circuit switch. The only IP routing it is called upon to do is to provide telnet access to a distant TA850(3rdGenRCU) over the unused DS0s of a T1.

                   

                  Thank you.