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Router Ethernet port toggling on and off for no reason sometimes it seems.

Router Ethernet port toggling on and off for no reason sometimes it seems.

Router Ethernet port toggling on and off for no reason sometimes it seems.
Router Ethernet port toggling on and off for no reason sometimes it seems.
Monday
Tags: #Network Connectivity
Model: Archer BE800  
Hardware Version:
Firmware Version: 1.2.4 Build 20250414 rel.18315(5553)

2025-11-10 16:58:38 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_ON lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:58:30 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:57:44 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_ON lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:57:36 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:56:50 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_ON lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:56:41 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 16:08:13 Led Controller INFO [23642] Start to run INET_UP

2025-11-10 16:08:13 Led Controller INFO [23642] Start to run INET_UP

2025-11-10 16:08:02 CLOUD_REPORT INFO [17683] get elapsedTime insights missed

2025-11-10 16:08:00 QoS INFO [32055] Service start

2025-04-14 00:01:38 UPnP INFO [740] Service start

2025-04-14 00:01:38 UPnP INFO [740] Service stop

Hardware version: v1.6
 

What would cause a device to flicker the ethernet port on and off like this?

After switching to another port that port also flickered on and off which makes me think its likely device ended, but what could cause a device to do that? Its a basically new PC with a PCI network card and the cable seems good so far? Any ideas for where to search or how to search?

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#1
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2 Reply
Re:Router Ethernet port toggling on and off for no reason sometimes it seems.
Monday

  @LegendForHire Here are the logs for after we switched ports 

2025-11-10 17:28:07 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

2025-11-10 17:28:01 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 17:25:17 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

2025-11-10 17:25:10 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 17:18:56 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

2025-11-10 17:18:48 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 17:17:35 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

2025-11-10 17:17:28 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 17:17:08 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

2025-11-10 17:17:01 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_OFF lan2g5_4_ON

2025-11-10 17:02:12 Led Controller INFO [23642] Start to run wanlancombosfp_OFF wanlan10g_OFF lan2g5_1_OFF lan2g5_2_OFF lan2g5_3_ON lan2g5_4_ON

 

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#2
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Re:Router Ethernet port toggling on and off for no reason sometimes it seems.
Tuesday

Hello @LegendForHire ,

Thanks for contacting our community.

 

When did this unstable connection begin? Have you changed any settings on the BE800 recently? Like a firmware update, or a change of wireless settings. 

 

May I know if your network topology diagram is as follows:

 [Modem] (Internet Access)  
        |  
        | 
    10Gbps WAN Port on BE800 ─┬─ 3x LAN Ports
                                                       ─ LAN Port → [PC] (PCIe NIC)  

  • Please specify which WAN and LAN ports are connected. 
  • If you remove the PC, will the router's unstable connection still exist? What is the model and operating system of your PC? 
  • If there is a switch between the router and PC, please also try removing the switch.
  • Please try a different cable between the modem and router. 


 

 

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