ethernet backhaul function not working - issue with cable?

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ethernet backhaul function not working - issue with cable?

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
ethernet backhaul function not working - issue with cable?
ethernet backhaul function not working - issue with cable?
2023-02-03 13:26:39
Model: Deco M9 Plus  
Hardware Version:
Firmware Version:

Hi, 

 

I have a set of 3 M9 Deco units with mesh enabled. 

 

I'd like to establish ethernet backhaul from slave unit to master unit, since the slave unit has weak wifi connection to the master unit. 

 

There is telephone access point and fortunately it has a UTP-cable in it. I've made RJ45 connectors on both ends. If I plus this home-made cable into the providers modem directly and the other end into my laptop, Internet works.. proof that the cable is fine. 

 

If I connect the cable to the slave Deco unit and into the master Deco unit on the other end, the slave model remains on wifi backhaul and doesn't switch to ethernet backhaul. 

In order to verify if the cable is correct, I've moved the slave unit just next to the master unit and connected them with a small (e.g. 30cm long) pre-fab Ethernet cable. Then it switches to Ethernet backhaul promptly. 

 

I have another ethernet cable going towards 2nd floor and there it works. Is it the cable that is poor? Since plugging this cable directly into the modem then things are fine. (apart from the one thing I'm trying to do here).

 

Thanks.

 

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 13:34:40

  @BasK 

 

It is most likely the cable that Deco units don't like for any reason, but perhaps there might be a workaround which could make it work.

 

If you connect one side of that cable to Main Deco, and another side to laptop, will laptop have Ethernet link?

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 14:07:59

  @Alexandre. 

 

Hi and thanks for the reply! Unfortunately the lights won't blink in that configuration either. 

 

I won't be able to pull a new cable via the wall. They must have spilled some concrete during construction.. whatever has happened there. 

 

Think I'm better off to put a switch at the location where I wanted to place the ethernet-based slave Deco unit and connect the clients (e.g. Ultra HD TV) to the switch. Presuming the switch *will* accept this cable. 

 

I have a LAN-cable tester yet it needs a 9V battery which I don't usually have in stock. Will buy and post about the results. 

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 14:13:46

  @BasK 

 

That was going to be my next recommendation: using the switch.

 

Also, question for you: do you have ISP modem or ISP modem/router? Because, if it is router, you could configure Deco mesh to run in Access Point mode and, then, won't need to link Main Deco with Satellite Deco. In that configuration, you can connect Satellite Deco with Ethernet cable (through switch) directly to the router. 

Main Deco can be connected to the different Ethernet port of ISP router.

 

See How to set up Deco to work in Access Point mode

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 14:29:57

  @Alexandre. 

 

It is for sure a modem/router 'all-in-one' solution for people with need-for-broadband/TV/telephone.

 

Can it be a combination? Because: slave unit #2 needs to have wifi to the Main unit (ethernet not possible), but slave unit #1 can go - via Ethernet - directly into the ISP modem/router. 

Will Mesh be function in between the 3 units? 

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 14:35:13

  @BasK 

 

Then, you should configure Deco mesh to run in Access Point mode and everything should work, wired and wireless, assuming you can manage to make that Ethernet cable work through the switch or otherwise.

 

Here is my home setup, with M9 Plus and M5 Deco units, in Access Point mode.

 

Main Deco - Ethernet wired through switch connected to the router

Satellite Deco #1 - wirelessly connected to Main Deco

Satellite Deco #2 - Ethernet wired through same switch as Main Deco

Satellite Deco #3 - Ethernet wired directly to the router

 

The only caveat is to have switches compatible with Deco Ethernet backhaul. Avoid D-Link brand. TP-Link brand is a safe bet. More about it here: General questions about Ethernet Backhaul feature on your Deco

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 14:58:29

  @Alexandre. 

 

I've also tried to connect the main Deco unit via the 'suspected' cable directly to the modem/router: doesn't work. 

How will the switch - in between the modem/router and the Deco unit - then make a difference? 

 

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Re:ethernet backhaul function not working - issue with cable?
2023-02-03 16:19:10

  @BasK 

 

That would be the plan: connect one side of that cable directly to modem/router and another side to the switch. If switch can negotiate connection with the router, you can connect anything you want to the switch and it'll work, including Deco unit.

 

I would recommend to look for a switch that has LED lights on its ports reporting status. Just having "Link on/off" LED may not be enough. Find a switch that can report speed of connection on each of its ports, too. Even if it is a bit more expensive.That option may become handy in troubleshooting if switch decided to negotiate speed with the router less than gigabit. 

 

Here is an example of such switch:

 

 

 

Unless, of course, your ISP router does report this info, then you can just check it on a router side. Example:

 

 

 

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