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  1. #1

    Deco node starts blinking red shortly after connecting ethernet backhaul cable

    Model: Deco M5

    Hardware Version: 1.0

    Firmware Version: 1.1.1 Build 20170614 Rel. 66381

    So I'm trying to get ethernet backhaul working on my Deco M5 package but as soon as I connect an ethernet cable to the second Deco node the LED starts blinking red and the whole wifi network goes down.
    The first node, configured as a router, still shows green LED even though the network is down.
    I've also tried to have the second node connected via ethernet during initial setup but that doesn't work either. Of course I've also tried new cables and so on to make sure it's nothing wrong with them.
    I'm yet to try the third node in the box but as I saw several people having issues with this I thought that I'll just ask about it first.


    Below are two sketches.
    The first method is how I've tried connecting it but without success. The second method is how I'd like to connect and also tried without success but I'm wondering if method two is even a possibility?

    Name:  Mesh.jpg
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Size:  9.2 KB
    Last edited by TP-Link Deco; 12-29-2017 at 12:22.

  2. #2
    Method 2, should be no problem, have it myself with 6 Deco's. a whole chain of Deco and switch combinations.You might want to install/setup all 3 without Ethernet yet and possibly not in final locations too.Just to get it running and then update firmware through the app and only then start reconnecting Ethernet. See if that helps.

  3. #3
    @Stevo82

    "as soon as I connect an ethernet cable to the second Deco node the LED starts blinking red and the whole wifi network goes down"

    May I know what does the other side of the ethernet cable go to? It seems there is probably another DHCP server on the other side of the Ethernet cable who assigns an IP address without internet access to the second Deco unit.
    At this time, the Wi-Fi will lose internet. But you should be still able to connect to it. Just connect the Wi-Fi, check the IP settings and find out what the gateway address is. Then the device with gateway IP should be the root cause.

  4. #4
    The other side goes to the first Deco unit that's been setup as a router.As far as I can see the WiFi just goes away hence I'm unable to connect to it at all and therefore unable to do anything with the Deco app since WiFi is the only way to connect?

  5. #5
    Please try to connect the second Deco directly to the main one bypassing the switches.

    If it works fine with the direct connection, then it seems the switches effect the Ethernet Backhaul feature. A possible reason is that the switches have a default management IP address 192.168.0.1, which is same as the LAN IP address of the main Deco unit, causing data cannot be transferred correctly.

    In this case, it's recommended to change the default management IP address to another subnet on the switches.

  6. #6
    So I've returned my DECO units to the store yesterday.
    Yes they did work upon connecting them directly to each other having them just next to each other, tried for about 15 minutes.
    Upon connecting them to the ethernet cables in my house, without any switches or other network components, it works but seems a bit unstable with the nodes going red from time to time. With switches connected it didn't work at all and I only have "dumb" switches without possibility to manage over any IP. I tried all switches I have, D-link and Zyxel.
    Worth noting that I find it unlikely that the cables are the problems since everything else in my network works fine with good speeds and connections so not really sure why DECO seems so sensitive or perhaps the ethernet backhaul isn't just ethernet backhaul but rather a combination of that and wireless backhaul with the wireless coverage being the issue when I moved them away from each other.
    Anyway I'm not interested in paying $300 for something that sensitive and unstable and hence I've returned them.

  7. #7
    Quote Originally Posted by Stevo82 View Post
    So I've returned my DECO units to the store yesterday.
    Yes they did work upon connecting them directly to each other having them just next to each other, tried for about 15 minutes.
    Upon connecting them to the ethernet cables in my house, without any switches or other network components, it works but seems a bit unstable with the nodes going red from time to time. With switches connected it didn't work at all and I only have "dumb" switches without possibility to manage over any IP. I tried all switches I have, D-link and Zyxel.
    Worth noting that I find it unlikely that the cables are the problems since everything else in my network works fine with good speeds and connections so not really sure why DECO seems so sensitive or perhaps the ethernet backhaul isn't just ethernet backhaul but rather a combination of that and wireless backhaul with the wireless coverage being the issue when I moved them away from each other.
    Anyway I'm not interested in paying $300 for something that sensitive and unstable and hence I've returned them.
    It is good to know that you have gone through this and found it not to work. I am more than likely returning my set as well as the list of issues keeps growing with these. At this price point you really shouldn't have to deal with all these problems and lack of functionality.

  8. #8
    Junior Member bradwebber is on a distinguished road
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    I am having exactly the same problem as the OP. My network configuration is the same as the OP's method 2.

    When I bypass my switch and plug my second deco directly into the first then it works fine.

    My switch is is a D-Link DGS-108, which is an unmanaged switch; I am pretty sure it does not have an IP Address that might be conflicting with the Deco's IP Address.

    I do not have any other device connected to the network that is running a DHCP server.

    Could TP-Link please advise why my unmanaged switch might be causing this problem?

  9. #9
    There may be some other special default settings on the switch .
    You may troubleshoot like this. Connect a PC to the second deco via a cable and check what's the IP address the PC get.
    Hope you can share the result.

  10. #10
    I'm having the same issue with my unmanaged switches. I've tried both a d link GO-SW-5G and a tp link TL-SG1008D. When I try either switch my primary and secondary decos will alternate between blinking red and solid green and are unusable. Has anyone had eth backhaul success with unmanaged switches?

  11. #11
    Quote Originally Posted by patatoeswizard View Post
    I'm having the same issue with my unmanaged switches. I've tried both a d link GO-SW-5G and a tp link TL-SG1008D. When I try either switch my primary and secondary decos will alternate between blinking red and solid green and are unusable. Has anyone had eth backhaul success with unmanaged switches?
    Has you updated the firmware of deco?

  12. #12
    Quote Originally Posted by patatoeswizard View Post
    I'm having the same issue with my unmanaged switches. I've tried both a d link GO-SW-5G and a tp link TL-SG1008D. When I try either switch my primary and secondary decos will alternate between blinking red and solid green and are unusable. Has anyone had eth backhaul success with unmanaged switches?
    I'm also planning to get a TP-Link switch. Did you ever get things working properly?

  13. #13
    After updating my Decos to the latest version (FW 1.1.5 Build 20170820 Rel. 62483) I was able to get two of my units to play nice over ethernet using the tp link TL-SG1008D (modem > deco #1 > tp switch > deco #2). I have not had a chance to get the third unit setup over ethernet, I'll update if I run into any issues with that one.

  14. #14
    Same issue on my side with 2 Deco units (haven't tried with the third one yet as I seriously considering returning these).

    Both DECO have the latest firmware to date (1.1.6 Build 20171103 Rel. 47257) and I use a D-Link unmanaged switch (GO-SW-8G).

    I set-up deco #2 wirelessly next to deco #1 and it works fine.


    I tried the setup modem > deco #1 > d-link switch > deco #2 and both units start alternating between green and blinking red when I connect them.

    Issue does not come from the switch of my network as modem > deco #1 > d-link switch > computer works fine with 2 different computers on 2 outputs of the switch. Same, if I remove the switch from the setup and connect directly the 2 decos via my ethernet network it works fine.



    Anyone knows if any fix has been identified as this issue seems to have been going on for some months ? (apart from buying a switch from TP-Link )
    I reached out to TP-Link technical support but they were apparently unaware of the issue and this is when I found this post.


    I will try tonight with a different TP-Link switch (TL-SF1005D) that I have at home, although this is not ideal as it is 10/100Mbps.

  15. #15
    Might be a bit late in the day, but I’ve just noticed this thread. I have 4 Decos with the same firmware version as mentioned in the previous post. Over 30 devices connected via Wi-Fi or Ethernet. One of the decos is connected via WiFi as I didn’t have a handy Ethernet port other than through a power line adapter which was rubbish. All other units are connected via backhaul Ethernet with multiple unmanaged 8 port switches some of which are TP-Link and some Netgear - all the sub £20 10/100/1000 types from Amazon. The gateway is connected directly to a standard BT open reach modem and therefore acts as the primary router. I am portforwarding an SSH tunnel to a back up NAS device that I host and have multiple IP reservations for cameras and other devices that are permanently streaming data. Cabling is CAT6 which I terminated myself (I am a keen amateur). My Wi-Fi connectivity is superb (using an independent speed test) providing speeds that are a gnats whisker lower than the actual speed of the connection as confirmed by my SamKnows box ie 74Mbps. I rebooted remotely today to associate my connection to a fixed external IP address. The units seemed to take quite a while to reacquire themselves onto the ‘mesh’ (if that is the right word). But connect they did.. My reason for the post? Just to suggest that you can make the Deco work and work very well with excellent performance. I have been pleasantly surprised how well these mid priced units perfrom compared to my previous apple time machine routers. Wiring quality is obviously important when relying on backhaul as indeed is the Wi-Fi performance throughout the premises so each deployment will have its own peculiarities. Customer service has also been pretty responsive to a couple of queries that I raised through the feedback option in the app.


 

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