Official How to set up Ethernet Backhaul with your Deco devices

Ethernet Backhaul is a feature that makes it possible to wire the Deco units together.
Thanks to this feature, every two Deco units can be wired with an Ethernet cable. And Deco will transmit data between the two units through the Ethernet connection, which is more stable and faster than Wi-Fi. Once Ethernet backhaul is established, the Wi-Fi backhaul connection will disconnect automatically.
Here are two typical connection structures for Ethernet Backhaul:
Notes:
1. Please note that the main Deco unit will act as a NAT router by default.
2. Please add the Deco units on the same network at first through the Deco app before you wire them together.
3. Please make sure there aren't any other DHCP servers behind the main Deco. Otherwise, it will cause the second and third Deco units to obtain an invalid IP address that doesn't have internet access.
4. If you have switches on the network and find Ethernet Backhaul not working, please check the management IP address of your switches. It's possible that some switches adopt 192.168.0.1 (which is the same as the LAN IP address of the main Deco) as the management IP, which may cause some conflicts on the network. In this case, it's recommended to change the management IP address of switches to another subnet.
Frequently Ask Questions
Q1: Can I connect all the Deco units directly to my home modem/router?
* In Router mode
Only the main Deco could be connected to your home modem/router. Other slave Deco units should be connected behind the main one, just as the Star Network shows. If not, they may be in a network loop and cause unexpected dropout issues.
* In Access Point mode
You can connect all the Deco units directly to your home modem/router/switch as you want. The system will work as expected.
Q2: How to turn on the Ethernet Backhaul feature?
No need to switch on this feature manually.
Just add your Deco units in the same Deco network and wire them together as per the above network structure. Then Ethernet Backhaul will take effect automatically.
Q3: How do I know if Ethernet Backhaul takes effect?
Launch the Deco app, tap on "Internet". Then tap on the slave Deco unit which is wired to other Decos and you can see its backhaul status.
Q4: To use the Ethernet Backhaul feature, do I need to wire all my Deco units?
Nope. You can set up one for wireless backhaul, and the other one for Ethernet backhaul as what you want.
For example, if you have three Deco units and want to create Wi-Fi not only in your house but also in the garage, which is a little far from the house and without Wi-Fi coverage. Then you can put the main Deco and slave Deco 1 in your house (wireless backhaul). As for slave Deco 2, you can place it in the garage with a long Ethernet cable connected to the main or slave 1 unit. In this case, the slave 2 unit will work through Ethernet backhaul, while the main and slave 1 will work through wireless backhaul.
Q5: Why my Decos become unstable once they're connected via a switch?
It's probably that you're using a D-Link switch.
The Deco Ethernet backhaul feature is based on the standard IEEE 1905.1 protocol. However, we find that some D-Link switches will not forward packets based on IEEE 1905.1 protocol, causing all Deco units in a loop and become quite unstable. If you have a D-Link switch and encounter unstable issue with Ethernet backhaul, we recommend to change another brand of a switch or contact D-Link support directly for a fix.
If you're not sure which switch to use, TP-Link switches may be a good choice.
Q6: Can I set up Ethernet Backhaul through a powerline connection?
That's okay if the powerline connection doesn't block any data flow.
Typical topology is, modem ---- main Deco ---- Powerline unit~~~Powerline unit ---- slave Deco
Q7: Can I set up different Deco models such as M5 and M9 Plus together through Ethernet backhaul?
Yes, just configure and add different Deco models in the same Deco network. After that, you can wire them to set up the Ethernet backhaul connection.
You could refer to the link below for how to add different Deco models in the same network.
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This is how I was able to get this system to work in AP mode, with the help of some input from previous post:
1. Plugged the 1st M5 into a wired connection.
2. Re-booted (powered Down) Comcast cable modem and the M5, I found this to be a step you can't and/or shouldn't bypass.
3. Added the two additional M5 Deco's.
4. Updated the firmware, as the previous post said, I ensured all three were close to each other.
5. Under advance features, took it out of Router mode and put it in AP mode.
6. Took the other two M5's and plugged them into the wired RJ45 plug, all three M5 were wired into the (For me I'm using a TP-Link Giga Switch) same network switch.
Note: I tried the Comcast Cable Modem first and it didn't seem to like it, internet didn't work properly.
The first time I attempted this I believe one of the M5 Deco's did not configure (entered AP mode) correctly, so I reset all three and started over and it worked on the second try.
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@TP-Link Deco
How to do the setup using the Deco App for AP mode? My setup as follow:
Modem----- Router-----LAN Cable----- DecoM5 (AP1)
|
-----LAN Cable----- DecoM5 (AP2)
in Deco App, should I add a new network for each of this AP or all in same network?
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So - got it setup (put in as they ask - move everything to AP mode - then you cna put them anywhere u like.
Result was a really slow network - speeddtests took ages to come up to speed and never came near my max speed whereas using the original AP it came to max speed immediately.
Not remotely impressed. Will regift them.
Went back to my non Deco TP-Link AP and router.
You cannot change the radios on them - and they pick same channel that everytinhg else in world picks.
Avoid.
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I have this setup:
Cable-Modem -> Winston-privacy -> TL-R600VPN_router -> E-net_switches -> (direct-wire to each 3 X60's and 1 W3600 [aka X20]) + non-wired W3600
It all works great. The key is that the "Master" Deco was first set up, while wired to a switch, and then changed to "Access Point" mode (not the default router mode). Since I already had a router in the network, using the Deco Mesh for routing is unnecessary (and potentially a significant source of performance issues!).
Unlike the TP-Link diagrams, each wired Deco unit is independently connected to a switch ... in a "fan", if you will. The "Master" Deco, since it is not acting as a router, is not connected any differently than any other Deco unit. That also means that I can switch which Deco acts as the "Master" without any issues ... the key being that the whole WiFi Mesh is in Access Point (AP) mode.
For each subsequent Deco, I first connected it with an Ethernet cable and physically near the "Master" Deco (so it could quickly find the new one) and thus the new unit would 'inherit' the configuration of the network (including not only the WiFi setup but other mesh-wide features such as whether the LED light should be on or not). Once fully 'connected' (and firmware update+reboot was all done for the new device), I then physically moved that device to its proper location with the wire connection at that location.
psst: even though the message says the entire Mesh network will be offline while rebooting, it really is only rebooting the one node which required the firmware update & reboot. That, of course, will be different if *all* the nodes get an update at the same time in the future. One hope that at some point TP-Link will eventually provide for staggered updating -- as long as the update is such that it can be done that way -- to minimize overall network disruption (which is particularly important the more "IOT" devices one has connected to the network).
That setup procedure also worked just fine for the one W3600 [X20] which I'm currently running with just the wireless backhaul -- I did the initial setup with a cable to a switch, then, after it was automatically set & updated (as only an Access Point, just like the other nodes), I then moved it to its proper location -- no Ethernet connection -- and it works fine there (of course it has to be within wireless range of at least one other Mesh node ... I think it's actually getting a decent backhaul from at least two of them).
I observed that once a node is powered off, moved, then powered back on, it does take a little while (10's of seconds for it boot and then to find & join the Mesh) ... easily long enough for the 'app' to first report it as "disconnected" from the Mesh ... but then a bit later it shows everything is fine.
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@IrelandRocks ... I have also noted that there is no means to 'choose' the channels for the 2.4 & 5G bands. I hope they'll add that with a future firmware update.
I did notice that the bands chosen during the initial setup (when it was acting in the default routing mode) were different than the bands used once I switched to Access Point mode, so they certainly are not choosing "fixed" channels.
I do recognize that most people are not going to have a spectrum analyzer (or computer with appropriate software) to be able to look at what their "environment" has and choose a less-congested band manually, so it is okay with me if they have some kind of automatic "band-chooser" initially. I'd just like to be able to change it.
I will be curious to watch and see if at some later point (perhaps after the next firmware update, when the entire Mesh reboots?) the bands chosen change.
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Hi,
I am trying to set my 3 Deco M9's to use ethernet backhaul due to there being some poor wifi spots in my house. Below is my setup. The Wifi speed on the second deco (which is powerlined to the primary "main" deco) is great but the 3rd deco (also powerlined) is very poor, speeds improve when I disconnec the ethernet cable. Please advise?
Modem > Deco M9 (Main)
Deco M9 (Main) > TP Link AV1000 powerline
TP Link AV1000 powerline #2 > Deco M9 (Second)
TP Link AV1000 powerline #3 > Deco M9 (Third)
Thanks.
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