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    Ubiquiti AF5 Connection Question

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    • scottalanmillerS
      scottalanmiller @Dashrender
      last edited by

      @Dashrender said in Ubiquiti AF5 Connection Question:

      @anthonyh said in Ubiquiti AF5 Connection Question:

      @scottalanmiller said in Ubiquiti AF5 Connection Question:

      @anthonyh said in Ubiquiti AF5 Connection Question:

      With a straight cable, you should be able to connect two gigabit devices and have them link at gigabit speed, right??

      Speed is not related to the straight or crossover cables or switches. GigE devices should do GigE speed unless something is wrong. cable too short could cause issues.

      A too short cable can cause issues? Innnnnteresting. I had no idea. #themoreyouknow

      The cable is 1 foot long CAT5e. Would that be a no-no for gigabit connections?

      I don't know what the wavelength is, but yeah - to short of cables can cause the single to be cut short - damn can't think of a better way to explain that.

      you need enough distance in the cable for more than one full wavelength.

      1 Reply Last reply Reply Quote 0
      • travisdh1T
        travisdh1 @anthonyh
        last edited by

        @anthonyh said in Ubiquiti AF5 Connection Question:

        @scottalanmiller said in Ubiquiti AF5 Connection Question:

        @anthonyh said in Ubiquiti AF5 Connection Question:

        With a straight cable, you should be able to connect two gigabit devices and have them link at gigabit speed, right??

        Speed is not related to the straight or crossover cables or switches. GigE devices should do GigE speed unless something is wrong. cable too short could cause issues.

        A too short cable can cause issues? Innnnnteresting. I had no idea. #themoreyouknow

        The cable is 1 foot long CAT5e. Would that be a no-no for gigabit connections?

        If I remember correctly, you want at least 18" for the total run. Normally it's not an issue because the short 6" cables are only used in the wiring closet, where the actual run is much longer. Shorter and the waveform gets cut off, and the error correction starts to have problems.

        1 Reply Last reply Reply Quote 0
        • scottalanmillerS
          scottalanmiller
          last edited by

          Yeah, I avoid anything under 3'.

          anthonyhA 1 Reply Last reply Reply Quote 1
          • anthonyhA
            anthonyh @scottalanmiller
            last edited by

            Ahh. This makes total sense. I learned something today!

            travisdh1T 1 Reply Last reply Reply Quote 1
            • travisdh1T
              travisdh1 @anthonyh
              last edited by

              @anthonyh said in Ubiquiti AF5 Connection Question:

              Ahh. This makes total sense. I learned something today!

              Now you know, and knowing is half the battle!

              alt text

              1 Reply Last reply Reply Quote 1
              • anthonyhA
                anthonyh
                last edited by

                So, I'm here at the repeat site (yay for mobile hot spots). I swapped my 1 foot homemade CAT5e cable out for a pre-made 7 foot CAT6 cable.

                When I connect the two radios together, they still negotiate at 100mbps.

                When I connect each radio to my laptop (running Fedora), the link comes up as gigabit.

                So, now, I'm confused. Not sure what's going on here.

                travisdh1T scottalanmillerS 2 Replies Last reply Reply Quote 0
                • travisdh1T
                  travisdh1 @anthonyh
                  last edited by

                  @anthonyh said in Ubiquiti AF5 Connection Question:

                  So, I'm here at the repeat site (yay for mobile hot spots). I swapped my 1 foot homemade CAT5e cable out for a pre-made 7 foot CAT6 cable.

                  When I connect the two radios together, they still negotiate at 100mbps.

                  When I connect each radio to my laptop (running Fedora), the link comes up as gigabit.

                  So, now, I'm confused. Not sure what's going on here.

                  Yes, yay for hotspots indeed.

                  Do you happen to have a crossover cable around somewhere? It shouldn't make a difference, but apparently the APs are not happy without one.

                  anthonyhA 1 Reply Last reply Reply Quote 0
                  • anthonyhA
                    anthonyh @travisdh1
                    last edited by anthonyh

                    @travisdh1 A home-made one that I left on my desk. According to a Ubiquiti employee (I posted on their forum) it should work. So I'm confused.

                    https://community.ubnt.com/t5/airFiber/Directly-Connecting-Two-AF5-s/m-p/1607575

                    travisdh1T 1 Reply Last reply Reply Quote 1
                    • DashrenderD
                      Dashrender
                      last edited by Dashrender

                      Apparently I'm just dense - what are you connecting together at the remote site? The large AF5 outdoor antenna/dish/whatever to what?

                      You talk about connecting to radios together? what radios?

                      OK I think I got it. You have a total of 4 AF5s
                      one in your building, two on a building in the middle, one pointing at you and one pointing toward your other location, and a fourth at the remote location.

                      OK I got it.

                      anthonyhA 1 Reply Last reply Reply Quote 1
                      • travisdh1T
                        travisdh1 @anthonyh
                        last edited by

                        @anthonyh said in Ubiquiti AF5 Connection Question:

                        @travisdh1 A home-made one that I left on my desk. According to a Ubiquiti employee (I posted on their forum) it should work. So I'm confused.

                        https://community.ubnt.com/t5/airFiber/Directly-Connecting-Two-AF5-s/m-p/1607575

                        Confusing for sure. At this point I'd almost just leave a switch in place if they're going to be this finicky about a direct connect 😕

                        anthonyhA 1 Reply Last reply Reply Quote 0
                        • anthonyhA
                          anthonyh @Dashrender
                          last edited by

                          @Dashrender said in Ubiquiti AF5 Connection Question:

                          Apparently I'm just dense - what are you connecting together at the remote site? The large AF5 outdoor antenna/dish/whatever to what?

                          You talk about connecting to radios together? what radios?

                          I have two Ubiquiti AF5 radios at a "repeat" site bridging two locations. Originally I had a switch installed here so the connection between the two was like so:

                          Radio <---> PoE Injector <--> Switch <--> PoE Injector <--> Radio

                          Because of the odd issues we've been having with the link, I suspect the switch may be part of the issue. So I'm trying to eliminate it by directly connecting the two radios like so:

                          Radio <--> PoE Injector <--> straight CAT6 cable <--> PoE Injector <--> Radio.

                          The problem is when directly connecting the two, they only negotiate 100Mbps. I need them to negotiate at gigabit.

                          Hopefully it makes sense.

                          1 Reply Last reply Reply Quote 0
                          • anthonyhA
                            anthonyh @travisdh1
                            last edited by

                            @travisdh1 said in Ubiquiti AF5 Connection Question:

                            @anthonyh said in Ubiquiti AF5 Connection Question:

                            @travisdh1 A home-made one that I left on my desk. According to a Ubiquiti employee (I posted on their forum) it should work. So I'm confused.

                            https://community.ubnt.com/t5/airFiber/Directly-Connecting-Two-AF5-s/m-p/1607575

                            Confusing for sure. At this point I'd almost just leave a switch in place if they're going to be this finicky about a direct connect 😕

                            I'll need to find another switch if that's the case, which I can do. I was just hoping to simplify things.

                            travisdh1T 1 Reply Last reply Reply Quote 0
                            • travisdh1T
                              travisdh1 @anthonyh
                              last edited by

                              @anthonyh said in Ubiquiti AF5 Connection Question:

                              @travisdh1 said in Ubiquiti AF5 Connection Question:

                              @anthonyh said in Ubiquiti AF5 Connection Question:

                              @travisdh1 A home-made one that I left on my desk. According to a Ubiquiti employee (I posted on their forum) it should work. So I'm confused.

                              https://community.ubnt.com/t5/airFiber/Directly-Connecting-Two-AF5-s/m-p/1607575

                              Confusing for sure. At this point I'd almost just leave a switch in place if they're going to be this finicky about a direct connect 😕

                              I'll need to find another switch if that's the case, which I can do.

                              Needs must, and I bet a 100Mb connection would really crimp the network performance.

                              I was just hoping to simplify things.

                              Yeah, it's what I'd want to do as well.

                              1 Reply Last reply Reply Quote 0
                              • scottalanmillerS
                                scottalanmiller @anthonyh
                                last edited by

                                @anthonyh said in Ubiquiti AF5 Connection Question:

                                So, I'm here at the repeat site (yay for mobile hot spots). I swapped my 1 foot homemade CAT5e cable out for a pre-made 7 foot CAT6 cable.

                                When I connect the two radios together, they still negotiate at 100mbps.

                                When I connect each radio to my laptop (running Fedora), the link comes up as gigabit.

                                So, now, I'm confused. Not sure what's going on here.

                                This suggests that something is wrong with one of the NICs. Or both.

                                anthonyhA 1 Reply Last reply Reply Quote 1
                                • anthonyhA
                                  anthonyh @scottalanmiller
                                  last edited by

                                  @scottalanmiller

                                  I do have a spare radio. I can pull the PoE injector from that one and swap it around to test I suppose.

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

                                    @anthonyh said in Ubiquiti AF5 Connection Question:

                                    @scottalanmiller

                                    I do have a spare radio. I can pull the PoE injector from that one and swap it around to test I suppose.

                                    The PoE injectors can definitely screw this up. They get in the way of the autosensing.

                                    DashrenderD 1 Reply Last reply Reply Quote 1
                                    • J
                                      Jason Banned @JaredBusch
                                      last edited by

                                      @JaredBusch said in Ubiquiti AF5 Connection Question:

                                      @anthonyh said in Ubiquiti AF5 Connection Question:

                                      We are using Ubiquiti AF5's to connect two of our sites together. Because these sites do not have line of sight between them, we are leasing roofspace off a neighboring building and using it as a "repeat" site.

                                      We've recently started having trouble with the link, and I'm working on troubleshooting it. I'm not sure where the problem lies, but my suspicion is that it may be the switch we have at the repeat site.

                                      Can anyone think of a reason why I couldn't just eliminate the switch and conenct the two radios together directly? I'd use a crossover cable if they're not auto sensing.

                                      Thoughts?

                                      No reason that your should not be able to just connect them. TCP/IP does not care about a switch.

                                      We always did this. No reason to have a switch. However a PDU for reboots can be handy.

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

                                        @JaredBusch said in Ubiquiti AF5 Connection Question:

                                        @anthonyh said in Ubiquiti AF5 Connection Question:

                                        @scottalanmiller

                                        I do have a spare radio. I can pull the PoE injector from that one and swap it around to test I suppose.

                                        The PoE injectors can definitely screw this up. They get in the way of the autosensing.

                                        If you can hard set the adapters (though my spidey sense tells me that scott scolded me once because there's no longer a such thing - maybe I was dreaming that?).

                                        anthonyhA scottalanmillerS 2 Replies Last reply Reply Quote 0
                                        • anthonyhA
                                          anthonyh @Dashrender
                                          last edited by

                                          @Dashrender said in Ubiquiti AF5 Connection Question:

                                          @JaredBusch said in Ubiquiti AF5 Connection Question:

                                          @anthonyh said in Ubiquiti AF5 Connection Question:

                                          @scottalanmiller

                                          I do have a spare radio. I can pull the PoE injector from that one and swap it around to test I suppose.

                                          The PoE injectors can definitely screw this up. They get in the way of the autosensing.

                                          If you can hard set the adapters (though my spidey sense tells me that scott scolded me once because there's no longer a such thing - maybe I was dreaming that?).

                                          I wanted to try this as a test, but it'll only let you hard set the interfaces to 10-half, 10-full, 100-half, or 100-full. No gig options.

                                          JaredBuschJ scottalanmillerS 2 Replies Last reply Reply Quote 0
                                          • scottalanmillerS
                                            scottalanmiller @Dashrender
                                            last edited by

                                            @Dashrender said in Ubiquiti AF5 Connection Question:

                                            @JaredBusch said in Ubiquiti AF5 Connection Question:

                                            @anthonyh said in Ubiquiti AF5 Connection Question:

                                            @scottalanmiller

                                            I do have a spare radio. I can pull the PoE injector from that one and swap it around to test I suppose.

                                            The PoE injectors can definitely screw this up. They get in the way of the autosensing.

                                            If you can hard set the adapters (though my spidey sense tells me that scott scolded me once because there's no longer a such thing - maybe I was dreaming that?).

                                            Correct. officially autosense is the only way to do GigE.

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