Deco M5 backhaul speed capped at 100MB

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Deco M5 backhaul speed capped at 100MB

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
Deco M5 backhaul speed capped at 100MB
Deco M5 backhaul speed capped at 100MB
2021-01-07 20:24:14 - last edited 2021-01-07 20:45:55
Model: Deco M5  
Hardware Version:
Firmware Version:

I have a 3 pack of M5 Deco setup but when I connect via ethernet to the second port on the main deco the speed is capped at 100MB. The internet connection is capable of 200MB and this can be got over wifi but not via ethernet. I see other people with this issue on reddit and various other platforms - do you have a solution for this? Is it a known issue with the latest firmware update as it seems some people are only experiencing this after the latest udate.

 

Firmware ver is 1.5.1 build 20201022

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#1
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Re:Deco M5 backhaul speed capped at 100MB
2021-01-07 21:36:51

@Axwell_ 

 

The issue is related to the Ethernet cable being used so the other people as well are either using a Cat 5 and not a Cat5e or the current cable being used is bad. If a wireless client can get 200 Mbps, then you know the modem, cable from the modem, and the port of the Deco that the internet goes into is good. Another cause would be the device you are wiring to the Deco may only be capable of up to 100 Mbps.

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#2
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Re:Deco M5 backhaul speed capped at 100MB
2021-01-08 19:03:32

@Tony its a cat8 ethernet cable and the device is a laptop so neither of those are the issue...its a problem with the deco and their firmware..as per other people with the same issue here and reddit. 

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#3
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Re:Deco M5 backhaul speed capped at 100MB
2021-01-15 23:05:35

@Axwell_  I have the exact same issue. Gigabit all the way through but when i plug a device into the the 2nd port on the main deco (i have 4) it is limitied at 100MB. I'm running in router mode. I've confirmed its not a cable issue. I'm pretty sure TP-Link says these units have two gigabit ports angry

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#4
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Re:Deco M5 backhaul speed capped at 100MB
2021-01-15 23:11:42

@Tony 

 

With the following configuration I get 100Mb/sec

 

Server- gigabit switch - Deco - PC

 

If I plug the PC (same cable) into the gigabit switch I get 1000Mb/sec

 

All I can conclude is the port is 100Mb not Gigabit.

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#5
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Re:Deco M5 backhaul speed capped at 100MB
2021-01-18 21:23:40 - last edited 2021-01-18 21:24:36

The Deco does have gigabit ports, the Deco W2400 and the E4 are the ones that have 100 Mbps ports.

 

The Deco should have a speed test which tests the speed from the main Deco, what speeds does that show?

 

Also, check the QoS speed setting, if that is set to 100 Mbps, then everything connected will be 100 Mbps. Set it to 1000 Mbps up and down:

 

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#6
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Re:Deco M5 backhaul speed capped at 100MB
2021-02-28 16:34:20 - last edited 2021-02-28 16:35:47

Not sure if this post advances the discussion but since 120 is a figure above 100 here it is...

I Pay for 120 and my PC measures 120 via fast.com on any of the folowing "*PC" locations.
during the test I see numbers in 200's then things throttle down to 120 sometimes 130.

ISP/ISP_Modem
|
|cable_from_M5_box
|
M5    <<<  >>> *PC
|
|cat6
|
Gswitch--cat5E--*PC
|
|cat6
|
M5 <<<     >>> M5 <<<  >>> *PC 
|
|cat5E
*PC

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#7
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