Deco M4 - speed capped at 100Mbps

Deco M4 - speed capped at 100Mbps
Deco M4 - speed capped at 100Mbps
2020-02-26 08:03:21 - last edited 2020-03-19 08:39:47
Model: Deco M4
Hardware Version: V1
Firmware Version: 1.1.0 Build 20190620 Rel. 45372

Hi

 

I've been using Deco M4 since 5 months.

The setup was:

Broadband modem ==> Deco M4 1st unit ==> Deco M4 2nd unit.

 

Earlier my broadband was only 100Mbps and later I've upgraded it to 200Mbps.

My broadband modem and Deco M4 1st unit is connected using a Cat 6 ethernet cable. But still the maximum speed I'm receiving is capped at 100Mbps via Deco.

 

When I directly connect to my broadband modem then I'm receiving speeds upto 200Mbps.

Followed the troubleshooting steps on Deco but it didn't help!

 

Thanks

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1 Accepted Solution
Re:Deco M4 - speed capped at 100Mbps-Solution
2020-03-18 06:41:54 - last edited 2020-03-19 08:39:47

@Himanshu_IN the QoS in the Deco app was set at 100Mbps. Increasing that to 1000Mbps helped fix the issue.

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6 Replies
Re:Deco M4 - speed capped at 100Mbps
2020-02-27 01:22:34

@PavanKumar 

 

Hello, may I know what kind of troubleshooting you have done already? Below we list some information we need to narrow down this issue and fix it.

 

1. With a computer connected to the main Deco by wired cable directly, what is the speed you can get from it? Please check the wireless speed you can get from the main Deco as well with slave Deco powered off. 

2. At the same, please check the wired/wireless negotiation speed of your device. You can refer to https://www.tp-link.com/support/faq/2265/

3. What is the current operation mode of your Deco M4? 

4. Try to swap the locations of the Decos or switch the slave Deco to main Deco to give it a shot. Below is the instruction:

https://www.tp-link.com/support/faq/2400/ 

 

Good day. 

 

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Re:Deco M4 - speed capped at 100Mbps
2020-02-27 17:02:59

@Kevin_Z 

 

1. With a computer connected to the main Deco by wired cable directly, what is the speed you can get from it? Please check the wireless speed you can get from the main Deco as well with slave Deco powered off. 

Wired to main deco - 100 Mbps

Wireless to main deco with slave powered off - 100 Mbps

 

2. At the same, please check the wired/wireless negotiation speed of your device. You can refer to https://www.tp-link.com/support/faq/2265/

Please find attached the screenshots of the Ethernet and Wifi speed which is 1Gbps and 433.3Mbps respectively.

 

3. What is the current operation mode of your Deco M4? 

Dynamic IP

 

4. Try to swap the locations of the Decos or switch the slave Deco to main Deco to give it a shot. Below is the instruction:

https://www.tp-link.com/support/faq/2400/ 

Swapped the main deco with slave deco and repeated step 1 to test the speeds. It's still the same with maximum at 100Mbps.

File:
link speed 1.jpgDownload
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Re:Deco M4 - speed capped at 100Mbps
2020-02-28 12:27:56

@PavanKumar 

 

Thanks for your valued reply. Cause the speed gets stuck at 100Mbps and cannot be fixed via the troubleshooting methods we have done. 

 

To help you figure it out, our engineer will email you later and try to do further analysis to find a solution.

 

Please check your inbox and get in touch with our engineer. 

 

Good day. 

 

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Re:Deco M4 - speed capped at 100Mbps
2020-03-18 05:52:07

@PavanKumar  were you able to fix the issue?

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#5
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Re:Deco M4 - speed capped at 100Mbps-Solution
2020-03-18 06:41:54 - last edited 2020-03-19 08:39:47

@Himanshu_IN the QoS in the Deco app was set at 100Mbps. Increasing that to 1000Mbps helped fix the issue.

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#6
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Re:Deco M4 - speed capped at 100Mbps
2020-09-23 21:44:39

@PavanKumar I found that turning off the second deco(pulling the plug) for 5 minutes works... Now I get more than 100 mbps

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