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    [SOLVED] Communication problems between two computers

    How To... ?
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    • L
      Lauri last edited by

      @mark Thousand Thanks for your reply!

      Sorry, I wasn't thorough enough in my description. Actually the problem probably is not the crosswired cable, because the issue happens also with a router + normal cables. Also, Isadora on my MacPro (with normal ethernet socket) gets an IP address (I can see that in Isadora preferences). And that IP address is the same as in Mac System Preferences.

      However, whether going with the crosswired cable or a router, Isadora on my MacBookPro (with the Satechi multiport adapter/hooking ethernet cable to it) does not get an IP address – or it is 0.0.0.0 (contradicting to Mac System Preferences that shows a valid IP address).

      In addition, as I told before NDI/Syphon connection works both with crosswired cable AND router.

      Any other ideas?

      Thanks in advance,

      Lauri

      MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
      MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

      mark 1 Reply Last reply Reply Quote 0
      • mark
        mark @Lauri last edited by

        @Lauri 

        NDI most likely uses TCP/IP not multicasting, so the fact that it works doesn't necessarily have any impact on the Net Broadcaster.

        I really don't know what to say. I'm sitting here with my Mac Book Pro and a Mac Mini right across the room; started up and had transmission in both directions without issue. The fact that Isadora doesn't show an IP number is however telling. Is there some other software that might be using IP Port 1234?

        Quit Isadora and try typing this into the Mac OS terminal:

        lsof -Pn -i4

        and then hit return. A long list will appear... look for *.1234.

        For example, when I'm running Isadora, I see

        Isadora   XXXXX XXXXX   34u  IPv4 0x400e15edb828689      0t0  UDP *:53712
        Isadora   XXXXX XXXXX   37u  IPv4 0x400e15ec3a99d29      0t0  UDP *:1234

        which shows that ports 53712 and 1234 are being used by Isadora. The question is, is port 1234 being used by some other program when Isadora is not running? If so, that would explain the problem. You can't have one port being used by two programs at the same time.

        Regardless, try going to the Isadora Preferences -> MIDI/Net and changing the port number to 8000. Then restart Isadora and see if there is an IP address shown in the Prefs.

        Best Wishes,
        Mark

        Media Artist & Creator of Isadora
        Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

        1 Reply Last reply Reply Quote 0
        • L
          Lauri last edited by

          @mark 

          Thank you for your reply. Sorry, but I'm now only with my MBP (which has the problem), I don't have MacPro here (which didn't have the problem). So, I'm testing only with MBP. I made the tests both with WiFi and the Satechi multiport USB-C adapter (which has an ethernet port).

          I did as you asked, quit Isadora, and saw that no other program used IP Port 1234 (UDP *:1234).

          Then I started Isadora 2.6.1b4 (port set to 1234), and Terminal resulted to:

          ...

          Isadora   XXXXX XXXXX   12u  IPv4 0x7fc007e82d1aaef1      0t0  UDP *:61605

          Isadora   XXXXX XXXXX   17u  IPv4 0x7fc007e82d1a7131      0t0  UDP *:1234

          ...

          Then changed Isadora 2.6.1b4 (port set to 8000), and Terminal resulted to:

          ...

          Isadora   XXXXX XXXXX   12u  IPv4 0x7fc007e82c319691      0t0  UDP *:57105

          Isadora   XXXXX XXXXX   17u  IPv4 0x7fc007e82c319431      0t0  UDP *:1234

          Isadora   XXXXX XXXXX   20u  IPv4 0x7fc007e82c31b0b1      0t0  UDP *:8000

          ...

          Then I made the same with Isadora 2.5.2

          Isadora 2.5.2 port 1234

          ...

          Isadora   XXXXX XXXXX   12u  IPv4 0x7fc007e82c319691      0t0  UDP *:51854

          Isadora   XXXXX XXXXX   16u  IPv4 0x7fc007e82c319431      0t0  UDP *:1234

          ...

          Isadora 2.5.2 changed the port to 8000

          ...

          Isadora   XXXXX XXXXX   12u  IPv4 0x7fc007e82c319691      0t0  UDP *:52714

          Isadora   XXXXX XXXXX   16u  IPv4 0x7fc007e82c319431      0t0  UDP *:1234

          Isadora   XXXXX XXXXX   19u  IPv4 0x7fc007e82c31b0b1      0t0  UDP *:8000

          ...

          But in any of these cases, I did not see the same port used by another application. Hope this helps. Let me know if you need more tests.

          Best,

          Lauri

          MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
          MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

          1 Reply Last reply Reply Quote 0
          • L
            Lauri last edited by

            Oh, and I didn't get an IP address to Isadora prefs (neither v.2.6.1b4, nor v.2.5.2) in MacBookPro.

            Best,

            Lauri

            MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
            MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

            Fred 1 Reply Last reply Reply Quote 0
            • Fred
              Fred @Lauri last edited by

              @lauri sometimes the location presets in the network part of apple system preferences get corrupted. It can be good to delete this whole present and make another one. You will have to add each network adaptor again and make new manual IP addresses and netmasks (by the way do these match between systems?). I have had this several times and the new preset sorted it.

              http://www.fredrodrigues.net/
              https://github.com/fred-dev
              OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
              Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

              1 Reply Last reply Reply Quote 0
              • L
                Lauri last edited by

                @Fred Thanks for your advice. Not sure what presets you mean, are you referring to remove these (see image below)?

                I removed the "Wi-Fi" and "USB10/100/1000 LAN" (from the "-" button), applied changes, restarted the Mac, "rebuilt" the network connections, but nothing changed. 

                When either (USB-ERthernet adapter or Wifi) is on, I'm getting an IP address in the System Prefs (and internet works perfectly. However, I still don't get an IP address in Isadora prefs.

                @Fred, please let me know if you meant something else.

                MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
                MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

                Fred 1 Reply Last reply Reply Quote 0
                • L
                  Lauri last edited by

                  ... forgot to say that the Location is set to Automatic, as well as Configure IPv4: Using DHCP (which is automatic). So, the IP address is not set manually – should it be, and if so, why?

                  MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
                  MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

                  1 Reply Last reply Reply Quote 0
                  • barneybroomer
                    barneybroomer Beta Gold last edited by

                    But you say you got a ip adress on wifi or lan? Did you enabled fixed IP on your lan connections between the 2 computers? 

                    Mac Mini M1 2020 / OSX 11.7
                    MacBook Pro 2,3 Ghz Intel 8 core I9 / OSX 10.15.7
                    MacBook Pro 2,2 Ghz Intel 8 core I7 / OSX 10.15.7

                    and a Motorola DynaTAC 8000X ;)

                    1 Reply Last reply Reply Quote 0
                    • L
                      Lauri last edited by

                      @barneybroomer Thanks for your reply.

                      Yes, I got an IP address in Mac System Prefs on both computers (see the messages above), but Isadora recognised the IP address only in the other computer (MacPro).

                      No, I did not enable fixed IP on either computer, and still Isadora on the other computer (MacPro) recognised the IP address.

                      And, in my understanding, with Net Broadcaster – Listener pair fixed IP is not needed either.

                      MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
                      MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

                      1 Reply Last reply Reply Quote 0
                      • L
                        Lauri last edited by

                        ... and I got the IP address on Mac System Prefs on both machines, both with wifi and lan.

                        MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
                        MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

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

                          Dear @lauri and All,

                          This is such a mystifying problem. The fact that Lauri's machine shows a valid IP address in the system prefs, and that the she does not get one in Isadora is just really strange. It can only indicate that the creation of the UDP communications channels is failing for some reason... which could happen if the port was already in use, but the information Lauri provided above seems to indicate that's not the case.

                          Can you start by checking your firewall to ensure that you are allowing outgoing connections on the problematic computer.

                          If your firewall is open on that machine, then please follow the procedure here to allow apps from "anywhere" to run and let me know if that changes anything. (You can change it back after you've tried this by using "sudo spctl --master-enable" instead of "sudo spctl --master-disable")

                          To be clear for everyone, you don't need to move to a fixed IP address if you are using the Net Broadcaster and listener. A IP4 / DHCP connection is fine, as long as the router that is connecting the two computers supports multicasting, which normally it would.

                          As I said, I'm kind of stumped about this. I'm sorry for the bother Lauri, but this simply hasn't come up before. In situations like this where I'm really stuck, I usually ask users for access to their machine (under their observation of course) using TeamViewer. If you're open to that possibility let me know.

                          Otherwise, I'm probably going to have to compile a special version that outputs some kind of extra information that might show me what's going wrong when Isadora attempts to create its UDP communications ports.

                          Best Wishes,
                          Mark

                          Media Artist & Creator of Isadora
                          Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

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

                            Ive had this issues before when using windows and mac machines not too long ago, I don't have a definitive answer on how we managed to get it working but we were suspecting issues with thunderbolt to Ethernet adapters and possibly when a mac is boot camped (and possibly using thunderbolt to Ethernet adapter). In the end after numerous restarts of machines they started working again, that was using a switch and static ips.

                            Sorry that isnt much help

                            Ed

                            Ed
                            Razer 15, i7 - 9750H, 16gb, 500gb m.2 SSD ,Windows 10.
                            Surface Pro 5, i7-7660U, 16gb, 1tb SSD, Windows 10.

                            Fred 1 Reply Last reply Reply Quote 0
                            • Fred
                              Fred @EdJoynson last edited by

                              @edjoynson on bootcamp the cable and adapted has to be plugged in before boot no matter what the IP configuration.

                              http://www.fredrodrigues.net/
                              https://github.com/fred-dev
                              OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
                              Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

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

                                @Fred yes I found this out the hard way quite a while back, even when plugged in before hand we still had issues. 

                                Ed
                                Razer 15, i7 - 9750H, 16gb, 500gb m.2 SSD ,Windows 10.
                                Surface Pro 5, i7-7660U, 16gb, 1tb SSD, Windows 10.

                                Fred 1 Reply Last reply Reply Quote 0
                                • Fred
                                  Fred @Lauri last edited by

                                  @lauri I was referring to the drop down menu that now says location automatic. Make a new location. Also to try make things simpler use only a wired network, no wifi, just one network connection as well. 

                                  http://www.fredrodrigues.net/
                                  https://github.com/fred-dev
                                  OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
                                  Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

                                  1 Reply Last reply Reply Quote 0
                                  • Fred
                                    Fred @EdJoynson last edited by

                                    @edjoynson not sure what this was then. The plug in before boot is documented in the manufactures windows driver limitations.

                                    http://www.fredrodrigues.net/
                                    https://github.com/fred-dev
                                    OSX 13.6.4 (22G513) MBP 2019 16" 2.3 GHz 8-Core i9, Radeon Pro 5500M 8 GB, 32g RAM
                                    Windows 10 7700K, GTX 1080ti, 32g RAM, 2tb raided SSD

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

                                      It sounds like very similar issues to what Lauri is having, we didn't think anything of it when it happened. The computer had an ip and could be seen by other computers when pinging them. But like described before, it didn't show an IP in Isadora. It happened on the mac for sure, cant remember about the windows machine. 

                                      Ed
                                      Razer 15, i7 - 9750H, 16gb, 500gb m.2 SSD ,Windows 10.
                                      Surface Pro 5, i7-7660U, 16gb, 1tb SSD, Windows 10.

                                      1 Reply Last reply Reply Quote 0
                                      • L
                                        Lauri last edited by

                                        @mark & all,

                                        Thousand thanks for your replies and help.

                                        I did what you Mark asked, and found the following:

                                        System Prefs Firewall options Isadora was set to “Block incoming connections”. Sorry, should have thought about that. Changed Firewall options to “Allow incoming connections” for all Isadora versions, and got the IP address in Isadora prefs v2.6 and v.2.6.1b4. Although, the same procedure to Isadora v.2.5.2 this did not help – IP address shows 0.0.0.0 in Isadora 2.5.2 prefs.

                                        However, the procedure to “allow apps from anywhere” did the trick – once. I had the same IP address in Isadora v.2.5.2 and system prefs once, and then I did this “sudo spctl --master-enable” and then “sudo spctl --master-disable” to again “allow apps from anywhere”, and IP address in v.2.5.2 prefs shows 0.0.0.0.

                                        But what’s strange is that the Net Broadcaster - listener pair works in v.2.5.2, even in Isadora prefs the IP address shows 0.0.0.0. So, v.2.5.2 seems erroneously showing a wrong IP address in prefs. Anyway, now the Net Broadcaster - listener pair works in all versions I have (2.5.2, 2.6 and 2.6.1b4).

                                        This all applies both to wi-fi and router (MacBookPro ethernet via a Satechi multiport adapter and a MacMini I’ve got at home). So it works in wi-fi network too, if both machines are in the same wifi network. I did not have the crossword ethernet cable with me now, so have to try that later.

                                        I’m leaving for a longer trip the day after tomorrow, and now extremely busy, so cannot make a TeamViewer session now, sorry. Let’s think about that after my return in March, if still needed.

                                        @mark Thank you again for your superb help!!!!

                                        Best,

                                        Lauri

                                        MacPro (2013), 3.0GHz 8-Core Intel Xeon E5, RAM 64GB, Dual AMB FirePro D700, OSX 10.13.6
                                        MacBookPro (15 inch 2018), 2.6 GHz Intel Core i7, RAM 32GB, Radeon Pro Vega 20, OSX 10.14.6

                                        mark 1 Reply Last reply Reply Quote 0
                                        • mark
                                          mark @Lauri last edited by

                                          Troubleshooting Network Issues with Isadora@lauri said:

                                          Anyway, now the Net Broadcaster - listener pair works in all versions I have (2.5.2, 2.6 and 2.6.1b4).

                                          OK glad to hear that we finally got you up and running.

                                          Team: @Michel @Skulpture @DusX @mc_monte @crystalhorizon - please keep this in mind for the future

                                          I've just written this support article called "Troubleshooting Network Issues with Isadora" -- you can refer users to that if this comes up again.

                                          Best Wishes,
                                          Mark

                                          Media Artist & Creator of Isadora
                                          Macintosh SE-30, 32 Mb RAM, MacOS 7.6, Dual Floppy Drives

                                          D 1 Reply Last reply Reply Quote 3
                                          • D
                                            DillTheKraut @mark last edited by DillTheKraut

                                            @mark said:

                                            Troubleshooting Network Issues with Isadora@lauri said:
                                            Anyway, now the Net Broadcaster - listener pair works in all versions I have (2.5.2, 2.6 and 2.6.1b4).
                                            OK glad to hear that we finally got you up and running.
                                            Team: @Michel @Skulpture @DusX @mc_monte @crystalhorizon - please keep this in mind for the future
                                            I've just written this support article called "Troubleshooting Network Issues with Isadora" -- you can refer users to that if this comes up again.
                                            Best Wishes,
                                            Mark

                                             Sorry Marc, if I'm intervening here, with all respect but i think the support article is a bit misleading about the multicast point!
                                            I'm not 100% sure about how Isadora and the net Broadcaster is handling this, but how usually multicast software should do it. And as I already used the net broadcaster with several dumb hubs, I'm pretty sure that this works fine. And if I'm wrong about that, I would like to know how this is handled, because I want to know, why I need to buy expensive routers and/or switches with a specific function, unless I have a lot of traffic! Not talking to use several routers in one network, just to split it even without routing to another subnet.

                                            This is how I understand multicast and effecting network devices (taken from here, https://support.symantec.com/e... as it was the most simple description I found):

                                            ----

                                            Hubs, routers, and switches

                                            Configuring a network to work with multicasting requires configuring the
                                            physical devices that connect the computers to each other. These are
                                            hubs, routers, and switches. A network uses hubs, routers, and switches
                                            to send information from one part of the network to another part. Hubs
                                            pass all the information they receive, without filtering it. Routers may
                                            filter some information, and switches usually filter information.

                                            In most cases, hubs do not require any configuration. Configuration is
                                            required only in hubs that include capabilities that are normally found
                                            only in routers or switches.

                                            Configuring for multicasting

                                            Configuring a router or switch to use multicasting requires that the
                                            router or switch be IGMP capable. The specific steps that are used for
                                            configuring any particular router or switch require information that is
                                            specific to that router or switch. Information is usually available in
                                            the documentation that accompanies the router or switch, or from the
                                            manufacturer's Web site.

                                            More information

                                            If you suspect that your router or switch might not be correctly
                                            configured for multicasting, you can test this possibility by using a
                                            hub instead of a router or switch. If multicasting works when the
                                            computers are connected through a hub, and not when they are connected
                                            through a router or switch, the problem is probably due to the
                                            configuration of the router or switch or to the number of hops between
                                            the two computers.

                                            -----

                                            For my understanding, a full working, by all network devices supported multicast network is needed only, if you have a lot of traffic between them, like streaming video, or transmitting a lot of parameters parallel, etc.

                                            And my personal extra bit is, that a simple non managed switch should usually work like a hub in this case and just broadcast the multicast signal. Only more expensive managed switches should have these issues.

                                            Again, I might be wrong about this, but thus meaning everything I learned about RTP or audio protocol issues, like dante or  Motu might not be right, so I would be happy to get an update about this!

                                            kindly
                                            dill

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