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    SG-3100 4 Port Switch Problem

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    • N
      networkninja
      last edited by

      Hello,

      I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7945 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

      Thanks

      1 Reply Last reply Reply Quote 0
      • ?
        Guest
        last edited by

        @networkninja:

        Hello,

        I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7940 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

        Thanks

        Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

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        • N
          networkninja
          last edited by

          @johnkeates:

          Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

          That would be the first time Auto Sensing doesn't work since the Alix 2D3 days, but next time I have one in front of me I will try that.

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          • ?
            Guest
            last edited by

            I would try out a small switch between them to ensure that the auto sensing miss match will be gone.
            Cisco Small Business SG110-16HP

            Did you set up a proper cabling? As shown on the picture below?

            cp-7945g-rf-3T.jpg
            cp-7945g-rf-3T.jpg_thumb

            1 Reply Last reply Reply Quote 0
            • V
              VAMike
              last edited by

              @johnkeates:

              @networkninja:

              Hello,

              I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7940 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

              Thanks

              Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

              That's basically never the right thing to do. If you find yourself burning with the need to override the autonegotiation, be aware that you have to do it on both ends or things will really break.

              1 Reply Last reply Reply Quote 0
              • N
                networkninja
                last edited by

                @BlueKobold:

                I would try out a small switch between them to ensure that the auto sensing miss match will be gone.
                Cisco Small Business SG110-16HP

                Did you set up a proper cabling? As shown on the picture below?

                Hi Frank,

                I did verify the cabling. I have tried this with two different phones and two different SG-3100's and I had the same result. Putting a switch in between one of the LAN ports and the phone does fix the issue. These Cisco phones use Voice VLANs and also support PoE, I wonder if one of those two features is not supported by the Marvell 6000 switch.

                Thanks for looking.

                1 Reply Last reply Reply Quote 0
                • N
                  networkninja
                  last edited by

                  @VAMike:

                  @johnkeates:

                  @networkninja:

                  Hello,

                  I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7940 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

                  Thanks

                  Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

                  That's basically never the right thing to do. If you find yourself burning with the need to override the autonegotiation, be aware that you have to do it on both ends or things will really break.

                  I just looked and even on 2.4.2 I don't see a way to manually set speed and duplex on the 4 switch ports even if I wanted to.

                  1 Reply Last reply Reply Quote 0
                  • ?
                    Guest
                    last edited by

                    @VAMike:

                    @johnkeates:

                    @networkninja:

                    Hello,

                    I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7940 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

                    Thanks

                    Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

                    That's basically never the right thing to do. If you find yourself burning with the need to override the autonegotiation, be aware that you have to do it on both ends or things will really break.

                    Well, with stupid implementations like some older Cisco phones, sometimes it is. Some of them try to negotiate 1000Mbit + full-duplex on a 100Mbit port. On the other hand, the switch in the SG might be bad. Keep in mind that this kind of configuration is only made when we assume one or more devices in the chain are bad.

                    1 Reply Last reply Reply Quote 0
                    • N
                      networkninja
                      last edited by

                      @johnkeates:

                      @VAMike:

                      @johnkeates:

                      @networkninja:

                      Hello,

                      I just discovered that the SG-3100 LAN ports (1-4) will not link to any Cisco 7940 Gigabit phone. The phone displays "ethernet disconnected", and there are no link lights on the firewall side. If I move the cable to OPT1 it links up fine. Has anyone seen this issue?  Was able to replicate this issue on two different SG-3100s. I moved the LAN to OPT1 to work around this issue, but it would be good to know if there's a solution.

                      Thanks

                      Might be a autosense mismatch. If you are running the latest pfSense update, try changing the switch duplex and speed settings.

                      That's basically never the right thing to do. If you find yourself burning with the need to override the autonegotiation, be aware that you have to do it on both ends or things will really break.

                      Well, with stupid implementations like some older Cisco phones, sometimes it is. Some of them try to negotiate 1000Mbit + full-duplex on a 100Mbit port. On the other hand, the switch in the SG might be bad. Keep in mind that this kind of configuration is only made when we assume one or more devices in the chain are bad.

                      I tried two different SG-3100's and two different phones.

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                      • stephenw10S
                        stephenw10 Netgate Administrator
                        last edited by

                        Have you tried using a cross-over cable there?

                        You may well need one if the phones are not auto-MDIX and I don't believe those are.

                        Steve

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                        • N
                          networkninja
                          last edited by

                          @stephenw10:

                          Have you tried using a cross-over cable there?

                          You may well need one if the phones are not auto-MDIX and I don't believe those are.

                          Steve

                          This is a good point. I will need to test.

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                          • N
                            networkninja
                            last edited by

                            @stephenw10:

                            Have you tried using a cross-over cable there?

                            You may well need one if the phones are not auto-MDIX and I don't believe those are.

                            Steve

                            Crossover cable does the trick. You sir, are a gentleman and a scholar.  8)

                            Thanks

                            1 Reply Last reply Reply Quote 0
                            • jahonixJ
                              jahonix
                              last edited by

                              @stephenw10:

                              … cross-over cable ... if the phones are not auto-MDIX ...

                              Which means that the ports in the SG-3100 do not support auto-MDI/MDX as well?
                              Seriously, in a 2017 design?

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