The switch s optical port keeps going up and down

Port on core switch keeps dropping | Wired Networks

The port on our core switch (HP A5500) that our Smoothwall box is connected to keeps going up and down. It will drop for 3 seconds then come back up but this can have prolonged impact

Cisco 3750 Switch Port keeps going up and down

Since the port is going 10M I would guess there is a issue with the cable. Either some termination is loose or you have a bad cable. TDR tests can help with this.

Solved: What would cause all fiber optic ports on a switch to go down

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

Port Flapping: Causes, Troubleshooting, and Prevention

This guide provides a detailed understanding of what port flapping is, its causes, its impact on network operations, and effective methods to troubleshoot and prevent it.

Up/Down link status in CRS345 switch

Can you do the following test: take a laptop or a PC that shows the issue above and disable the go-to-sleep/hibernation power saving feature, make sure that it doesn''t go to sleep after a

Port flapping — Definition, common causes, and

Port flapping, also known as link flapping, causes a switch port''s state to fluctuate between up and down within concise periods of time. This instability caused by

FortiSwitch port flaps troubleshooting

Verify Cable Connection: Ensure the cable is properly connected between the switch port and the end device. Run the command below on FortiSwitch multiple times and check the

Port flapping — Definition, common causes, and troubleshoot

Port flapping, also known as link flapping, causes a switch port''s state to fluctuate between up and down within concise periods of time. This instability caused by flapping ports affects network connectivity

How to troubleshoot physical port flap or link down issue

The article provides information on troubleshooting port flaps or link down issues.

ports going down and up | Instant On

I disabled flow, storm and jumbo frames first thing, but they are still going down and up continually. I have attached a part of the log and interface statistics.

Diagnosing port flapping reasons : r/Juniper

I left the logging running for a while, and it appears that this flapping comes and goes - it flaps up/down rapidly for a few minutes, then goes quiet (operationally down) for hours. Any clues where I should

The switch s optical port keeps going up and down [PDF]

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