Having Issues with Wired Internet Not Working but Wireless Works Fine

MadgeH on 18/10/2020 - 18:57

I have a FTTC connection through TPG. Started with NBN50 and recently upgraded to NBN100. The modem supplied by ISP is TPlink VR1600V.

Now to the issues I'm having

Port 1 on the modem/router is connected to a router in the living room which is working fine

Port 2 is connected to another modem/router in the other side of the house, also working fine

Anything else connected to ports 3 and 4 (TV and IPtv box) works on and off so we've resorted to switching them to wifi connection and they're working fine.

Sparky has tested the cabling and all checks out fine. Modem is a new one issued by TPG after we started having issues. It feels like the issues only started after we upgraded to NBN100.
Is it possible the modem can't 'handle' the new speed and has issues when too many wired connections are on?

I'm stumped and don't know what else to do, ISP tech guys aren't the best.

NBN tech guy came out and reckons he fixed a faulty cable outside at the pit but nothing has changed.

Internet

Comments

  • whooah1979 on 18/10/2020 - 19:04

    to ports 3 and 4 (TV and IPtv box) works on and off

    The ports are faulty.

    • MadgeH on 18/10/2020 - 19:06

      It's a new modem though?

      • pharkurnell on 18/10/2020 - 19:59

        Wouldnt be the first time an electrical item has been DOA or partly faulty on delivery

    • twadds on 18/10/2020 - 19:08
      +5

      Seems likely, what happens if you switch the way you have it plugged in around(Tv and IPtv to port 1/2, modem/routers to port 3/4)?

  • No Username on 18/10/2020 - 19:12

    Check your QOS.

  • AustriaBargain on 18/10/2020 - 19:16
    +1

    TPG will provide free support if they supplied the device. Aussie Broadband helped us with a device that wasn't on their list, they are all basically the same anyway.

  • twadds on 18/10/2020 - 19:18
    +1

    https://community.tpg.com.au/t5/NBN-Installation/Strange-eth…

    https://forums.whirlpool.net.au/archive/96pmrxz9

    Possibly the same issue you're having?
    Modem has 4xGigabit lan ports, the speed of your connection shouldn't be an issue.

  • foxmulder on 18/10/2020 - 21:29

    Have you tried to put that thing on port 3 to port 2 temporarily see if it works ok? If it works it means port 3 is the the issue, if it still doesn't work it means port 3 is fine, other thing is an issue. The same with port 4.

  • pjetson on 18/10/2020 - 21:58

    FTTC comes with an NBN-supplied modem. There is just one ethernet connection on the modem, and you connect that port to the WAN port on a router that either you or your internet provider supplies. You don't need (and can't use) any other modem.

    I think you must have FTTN, not FTTC. The TPlink VR1600V appears to be a VDSL/ADSL modem/router, which is right for FTTN.

    It also appears that you have two other modem/routers connected to the TPlink VR1600V. You must be running these as just routers, and you're not complaining about them, so forget about them for the time being.

    As twadds says, connect your TV and IPTV box to ports 1 and 2 on the TPlink VR1600V instead of ports 3 and 4. Do they work properly now? If so, it would appear that ports 3 and 4 on the TPlink VR1600V may be faulty.

    You could also try connecting your other two routers to ports 3 and 4 to see if they then start having problems, which would further prove a fault with those ports.

    What brand and model are your two other modem/routers? Are they really modem/routers, or just routers, or maybe even just network switches? Maybe you're just using them as WiFi access points. If they are in fact modem/routers, can you use one or the other as the "main" modem/router?

    • trongy on 18/10/2020 - 23:10

      I think you must have FTTN, not FTTC.

      While the TPlink VR1600V does contain a VDSL modem, TGP also supply it to their FTTC subscribers who connect it to the FTTC modem via the WAN port. I know this because I've set it up at my Mum's place.

      • pjetson on 18/10/2020 - 23:31

        Yes, good point. However, that's not how the OP seems to be describing their setup. Only the OP can answer for sure, and they haven't made any further posts.

  • localhost on 18/10/2020 - 23:04
    +3

    If other routers have DHCP enabled as well - that could be the problem.

    • Brotality on 18/10/2020 - 23:19

      localhost here is right on the money. If you have more than one router connected on the same network, make sure only one (the modem) has DHCP enabled and the other routers have fixed IPs from the main router's IP range (so you can still access them)

      Otherwise, the other routers can give out IPs from their range and as a gateway they are not connected to the internet.

      If you run ipconfig on a pc that doesn't have internet, you'll notice the IP range or at least the gateway is not what it should be.

      • pjetson on 19/10/2020 - 08:42

        The OP says everything is working other than two ports on the "first modem/router". I can't see how that can be a DHCP issue on a secondary router (which, by the way, should ideally be set to bridge mode).

        So, in my opinion, the OP needs to disconnect everything other than the TPlink VR1600V and build from there, in a scientific manner, changing just one thing at a time.

        Connect just one device (say, the TV) to port 1 on the TPlink VR1600V. Does this device work? If so, move this device to each of the other three ports in turn. Does it work in all ports? Does it work in some ports and not others?

        Then, disconnect the TV from the TPlink VR1600V and plug the IPTV device into each port in turn, just like they did with the TV. Does the IPTV work in all ports?

        If one or more of the ports have troubles, then those ports seem to be faulty. It could be modem settings, but I'm not keen on telling the OP to do a factory reset since they might not have the login details or other settings that they need to put in again.

        Anyway, if the TV and IPTV both work in all ports of the TPlink VR1600V, then the next step is to plug them both in at the same time, in various combinations of ports. Do they both work in all ports?

        If everything is still working, the next step is to add something else to the mix - say one of the other devices that they are calling modem/routers. Does that device work? Do the TV and IPTV still work? In all combinations of ports?

        Next step would be to add the remaining modem/router to the mix.

        The idea is to remove everything, then change just one thing at a time and test everything each time you make a change. If you change more than one thing, or you don't test everything again each time you make a change, you can't be sure of where the problem arose.

        • Brotality on 19/10/2020 - 13:35

          I have many (painful) experiences with this particular issue. If another router has DHCP on somewhere on the network (even it's after 3 switches) it will stuff things up. It is a particularly tough issue to diagnose since not all of the devices behave the same.
          OPs description actually fits perfectly since the only thing you can really count on to work properly is the main router's wifi.

          • MadgeH on 19/10/2020 - 20:36

            @Brotality: One of the routers is a Tenda AC6

            https://www.pcbyte.com.au/store/product/tenda-ac6-ac1200-120…

            It does appear to have a DHCP server

            DHCP Server, DHCP Client List, DHCP Reservation

            I'll try disconnecting that router all together and see if that's an issue. TPG/NBN tech is coming out tomorrow to have a look and see if he can figure it out.

            It's all at my parents place so they have no clue what is happening and I can't be there everyday so it's hard to test all the above suggestions

  • MadgeH on 20/10/2020 - 10:40

    Thanks all. Turns out the tenant who is living on the other side of the house (granny flat) had an optus modem attached instead of a standard router. This was acting as another DHCP so was throwing everything out. We have disconnected that modem and everything is back up and running.

  • localhost on 20/10/2020 - 17:21

    Just ask him to disable DHCP on his modem and use it as a passive device.

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