Aug 15, 2025
If the switch starts normally, the fault will be automatically rectified after a while. If the switch starts abnormally, rectify the fault by referring to Case Study: A Device Restarts Repeatedly.
Aug 31, 2025
Learn why switch ports go down after reboot, including Errdisable, PoE, configuration issues, firmware glitches, and hardware failures. Step-by-step expert troubleshooting and recovery guide for IT
May 21, 2026
The device must have Huawei certified switch optical modules installed. Non-Huawei certified switch optical modules cannot ensure transmission reliability and may affect service stability.
Jul 06, 2026
On a big industrial plant we''ve replaced an old HP switch with a brand new couple of C2960x switches in stack configuration and ever since then, every 6/8 hours or so, the two fiber
Mar 14, 2026
We have four 8-port (1830 8G JL810A) switches in the office and all of them, for at least a week, have been randomly rebooting, or stop reporting into the cloud and need to be power cycled.
Feb 09, 2026
Troubleshooting Switch Port and Interface Problems If the entire switch is unresponsive, or multiple ports across different modules fail
Mar 15, 2026
A comprehensive switch troubleshooting from the physical layer to the data link layer to the network layer to find out why your network switch is not
Apr 05, 2026
This document describes how to determine why a port or interface experiences problems.
Jan 23, 2026
Restarting specific ports on switches automatic? Anybody got any suggestions how to restart switchports in a specific vlan on Cisco switches? I got some equipment
Jan 02, 2026
We have a Cisco switch and for the most part everything works fine however there is one office with a mini switch and two computers hooked up to it in a office which hooks into the patch
Oct 19, 2025
Is your modem constantly rebooting or dropping connection? Learn why your modem keeps resetting and how to troubleshoot it effectively to restore a stable
Nov 13, 2025
Does your modem keep resetting? There are some prevalent causes of this, and they''re easy to fix.
Mar 16, 2026
Understanding The Basics: What Is Router Rebooting And Why Does It Happen? Router rebooting refers to the process where the router restarts itself automatically. This phenomenon could
Jun 17, 2026
This is something we are addressing on the fiber line, but we noticed something strange, one switch on one end of the link reboots randomly whenever the port goes up or down.
May 30, 2026
The combo-port command configures the working mode of a combo interface. The undo combo-port command restores the default setting. By default, a combo interface works in auto mode. That is, the
Feb 08, 2026
We have a standalone switch that keeps resetting, knocking users off of their sessions. We''ve attempted a number of things to fix it, with no luck and I''m running out of ideas. Here''s what
Dec 19, 2025
If the issue is with the optical module, use a blower (e.g., a rubber bulb) or strong wind (e.g., from a fan) to blow or suck the TX and RX ports of the optical module, then test the connection status of the
Sep 05, 2025
I have a couple old 3 com super stack 3 switches (24 PT version) I was given by a friend when her work changed them out. I had kind of tested them saw no bad ports assumed it was just
May 02, 2026
Power cycling refers to turning off and on the switch or specific ports to reset their functionality. This can happen due to several reasons, such as faulty devices, incorrect
Apr 22, 2026
My thoughts: Someone may have gotten in the way of the optical link while it was running an automated bandwidth test and caused something like a UDLD/STP event which caused that port
May 06, 2026
All other access switch are HP 2510- 24G . In some time all the optical ports connected with the optical fiber cable (with optical module) shutting down . The whole network will going down.
Aug 16, 2025
Hello folks: Is there a script or Node Red config that can send a signal to a Unifi PoE switch and restart a specific port - and have this based on the uptime of a sensor/switch? Scenario: I have a finicky
Nov 16, 2025
We have a stack of two switches WS-C2960X-24PS-L and we are facing issue of auto reboot . We have checked same software version and same image is running on both switch .
Apr 02, 2026
Ports are locking up in a way that only a full switch reboot restores operation — which is unacceptable for a product positioned as enterprise-grade. Continuing to suggest that the issue is
May 16, 2026
For information about the port states, see ELSM Port States. If you disable ELSM automatic restart, the ELSM-enabled port can transition between the following states multiple times: Up, Down, and Down
Jan 18, 2026
In summary, when the auto mode is specified and the combo optical interface has an optical module installed, the combo interface works as an optical interface after the device restarts. You can forcibly
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