Deco XE75 port 1 no longer working
Good day. A few months ago lost my internet connection and after no luck debugging the issue I simply swap my ISP ethernet cable from port 1 to 3
- Before swaping: Port 1 ISP. Port 2 Deco Secondary unit. Port 3 Switch
- After swaping. Port 1 Switch. Port 2 Deco Secondary unit. Port 3 Switch
Several weeks later there were some power outages due rain & wind. Internet and Deco units recovered but devices connected to switch were no longer accesible
- Removing the swicth and connecting the device (example. laptop) to port 1 didn't fix the issue (no switch issue)
- Ethernet cables working as intended (neither failure here)
- Attempt several scenarios (cant recall them) but ultimately only port 2 & 3 were working as intended
Upgrading to 1.2.6 didn't fix the issue and just yesterday I update to beta firmware 1.2.7 with promising results yet still issues
My results
- 2 XE75 Deco units
- Device and connection seems stable. No performance or disconnection issues so far
- Ethernet port 1 is empty, port 2 goes to a switch, port 3 goes to ISP
- Port 2 switch has on it: 1. Ethernet connection to Arlo hub station (security cameras), 2. Ethernet connection to network HDD, 3. Ethernet connection to another Deco XE75 unit
- Main Deco Working scenarios
- Scenario 1: Port 1 empty. Port 2 switch. Port 3 ISP. Secondary Deco working as intended.
- Scenario 2: Port 1 empty. Port 2 ISP. Port 3, switch. Seocndary Deco working as intended
- Main Deco NOT working scenarios
- Scenario 3. Port 1 ISP. Port 2 switch. Port 3 empty (no IP, red light, no internet)
- Scenario 4. Port 1 ISP. Port 2 empty. Port 3 switch (no IP, red light, no internet)
- Scenario 5. Port 1 switch (w/o Deco unit). Port 2 ISP. Port 3 empty (there's internet, Secondary Deco works, but whatever is connected to the switch will be unaccessible)
- Scenario 6. Port 1 switch (w/o Deco unit). Port 2 ISP. Port 3 Secondary Deco unit (There's internet, Secondary Deco works as well but devices connected to switch are unaccessible)
- Scenario 7. Port 1 switch (w Deco unit). Port 2 ISP. Port 3 empty (There's internet at first, but after a few minutes the whole internet will stop working, including internet WiFi)
- In brief
- Whatever is connected to port 1 is NOT detected by Deco App
- Whatever is connected to port 1 will not have internet
- If there's another Deco unit connected to port 1 via a switch it will likely crash the Internet at all, including WiFi
After this, did swap Deco roles
- Working scenarios (Main Deco, used to be Secondary)
- Scenario 1: Port 1 empty. Port 2 switch. Port 3 ISP. Secondary Deco working as well
- Scenario 2: Port 1 empty. Port 2 ISP. Port 3, switch. Secondary Deco working as well
- Scenario 3. Port 1 ISP. Port 2 switch. Port 3 empty. Secondary Deco working as well
- Scenario 4. Port 1 ISP. Port 2 empty. Port 3 switch. Secondary Deco working as well
- Scenario 5. Port 1 switch. Port 2 ISP. Port 3 empty. Secondary Deco working as well
- Scenario 6. Port 1 switch. Port 2 any device. Port 3 ISP. Secondary Deco working as well
- Secondary Deco (old Main Deco) WORKS if connected via port 2 or 3
- NOT working scenarios
- Old main deco (now secondary deco) NO working if connected via Ethernet port 1
Looks like Ethernet port 1 is my issue... Any way to figure out the root cause? Port no longer working? Really doesn't make sense that only 1 port is no longer working
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Hi, Thanks for the feedback.
Did it work well before and stop 2 weeks ago?
If yes, I think you could contact the local support team to claim for warranty service:
https://www.tp-link.com/ca/support/contact-technical-support/#E-mail-Support
Thank you very much and best regards.
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Well, I just woke up to a cold house today because my heating system lost connection to the internet. Turns out the Deco system couldn't connect to the internet despite the FTTP modem having no issues whatsoever. The only way I could fix the issue was to move the ethernet cable for the modem to a different port on the main Deco, and then I had to move the heating module to a different port on a different Deco to get it to connect as well.
Long story short, I've started an email support request to start the RMA process.
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Got a replacement unit on mid-December 2023. Yesertday one of the replacement port# 1 was not working anymore. Email technical support and see what is the answer. Seems there was problems on port #1 and don't know what is the cause. The new unit only work ~ 2 months and dead again.
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This happened to me this morning. My internet kept going out every 15-20 minutes then discovered the issue was port 1. Factory reset did nothing.
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@David-TP I have the same problem, top LAN port not working on 2 from 3 pcs of my deco XE75. First deco unit with top LAN port not working from september 2023 and second deco unit from yesterday. Is a complaint with the seller the only solution? I have a warranty for 3 units until 11/2025.
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And without any reason... just from one day to another the second unit port 1 stop working. The second unit worked without incidents for almost 5 months and just like the first one, port 1 stop working without any logic explanation... same symptons... port 2 and 3 works as expected... only port 1 in BOTH deco unit no longer functional
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I got my XE75 Pro V2 unit last night. 2.5G port worked fine for couple of hour and then suddenly it stopped working.
Luckily Amazon is accepting the return of the product.
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I can confirm that the problem exists. Today, Port #1 also stopped working on my XE75 for no apparent reason (no power outages, etc.). It shows a link on the port, but there is no data exchange. My Deco's WAN connection type is DHCP, and it couldn't obtain an address from the router. I also tried switching to Static IP, but there was still no data exchange between the router and the Deco unit.
When I reconnected the cable from the router to Port #2, the LED on the Deco immediately turned green, and it successfully obtained an IP address. I then tried upgrading the firmware to the latest version - 1.3.2 Build 20240119 Rel. 39178. The upgrade was successful, but it didn't resolve the issue with Port #1. It's still "dead" (no data exchange, unable to obtain an IP address through DHCP, etc.).
So, it seems like a common problem. My Deco revision is EU/1.0.
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@DeckerSU Yes, I have the same firmware on an XE75 (EU/1.0) in AP mode. Power had been off, and when it was restored it had a solid red light - IP was not obtained, defaulting to 192.168.68.1. After some struggling including a full reset, I came to find that port 1 didn't work, despite it showing as a link up @ 1Gbps on the switch. Switched it to port 3, closest to the power plug, and it worked right away. Frustrating, especially as it is outside the warranty period now. Pretty poor if it is actually a hardware issue rather than firmware, given it isn't a cheap bit of kit.
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