Ethernet connects and disconnects on new system

Ethernet connects and disconnects on new system

Ethernet connects and disconnects on new system
Ethernet connects and disconnects on new system
2025-07-26 17:51:30

Just purchased TP-Link Deco AX2700, WiFi is working great, I have 2 lan cables connects to the main unit that is connected to the modem, both devices will connect and instantly disconnect from the system in a loop.  

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#1
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9 Reply
Re:Ethernet connects and disconnects on new system
2025-07-26 18:30:33

  @Isaac1212 

 

Can you please confirm that your network is set up like one of the following examples in this post and if your using example 1, 2 or 3

 

https://community.tp-link.com/en/home/forum/topic/98898

 

 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#2
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:17:06

  @HelpFixDecoApp  no, it's all wireless and the lan cables are connected directly into the main router that is connected to the modem. 

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#3
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:22:15

  @Isaac1212 

 

So you have a modem and a separate router and the decos?

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#4
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:24:06

  @HelpFixDecoApp  No, I have 3 decos, 1 of the decos is the main router. 

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#5
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:28:22

  @HelpFixDecoApp  I tried a different smaller lan cable to a different device that is next to the main deco, and it showing it is connected on the app.  Could it be the 2 lan cables that are looping are bad ?

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#6
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:34:54

  @Isaac1212 

 

The way I understand how deco's work one of the decos "has" to be connected to the modem. So you should be running an Ethernet cable from the back of your modem to one of your deco's which will be the main deco

 

After that the other decos can be connected either Wi-Fi or Ethernet 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#7
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Re:Ethernet connects and disconnects on new system
2025-07-26 19:58:15

  @Isaac1212 

 

It is possible for cables to go bad so yes if it's working with a different cable then i would toss the broken one 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#8
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Re:Ethernet connects and disconnects on new system
2025-07-26 22:28:09

  @HelpFixDecoApp  well I have the solution, whoever ran the old Cat 6 cables used "straight through" pins.  I cut both ends and changed it back to B and it's working.  Never would of thought

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#9
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Re:Ethernet connects and disconnects on new system
2025-07-26 22:41:48

  @Isaac1212 

 

Glad you got it working. I had a speed issue of my my own few months back turns out after some testing one of the Ethernet jacks in my wall stopped working so i had to run 25ft of cable from a different port in my room to another and it works fine now

 

Just need to get someone out here now to fix the dang port lol 

Need help with the Deco app, setup, Ethernet backhaul, network switch or rolling back firmware? Router or AP mode? https://community.tp-link.com/us/home/forum/topic/699816?page=1
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#10
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