M5300-52g3 port flapping

[ricardo_C]

I'm having problem with a specific port. As you can see below

Does anyone know what could be it? Why this's the only port flapping around?

<13> Nov 13 09:29:07 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36745 %% Link Down: 1/0/20

<13> Nov 13 09:29:06 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36744 %% Link Up: 1/0/20

<13> Nov 13 09:29:04 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36743 %% Link Down: 1/0/20

<13> Nov 13 09:29:02 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36742 %% Link Up: 1/0/20

<13> Nov 13 09:29:00 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36741 %% Link Down: 1/0/20

<13> Nov 13 09:28:59 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36740 %% Link Up: 1/0/20

<13> Nov 13 09:28:56 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36739 %% Link Down: 1/0/20

<13> Nov 13 09:28:55 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36738 %% Link Up: 1/0/20

<13> Nov 13 09:28:52 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36737 %% Link Down: 1/0/20

<13> Nov 13 09:28:51 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36736 %% Link Up: 1/0/20

<13> Nov 13 09:28:48 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36735 %% Link Down: 1/0/20

<13> Nov 13 09:28:47 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36734 %% Link Up: 1/0/20

<13> Nov 13 09:28:44 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36733 %% Link Down: 1/0/20

<13> Nov 13 09:28:43 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36732 %% Link Up: 1/0/20

<13> Nov 13 09:28:41 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36731 %% Link Down: 1/0/20

<13> Nov 13 09:28:40 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36730 %% Link Up: 1/0/20

<13> Nov 13 09:28:37 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36729 %% Link Down: 1/0/20

<13> Nov 13 09:28:36 169.254.100.100-1 TRAPMGR[344358892]: traputil.c(657) 36728 %% Link Up: 1/0/20

[JohnC_V]

Hi ricardo_C,

Welcome to our community! 🙂

It seems that port 20 is flapping. It could be better if you could answer the questions below in order for us to help you further:

- May I know if you already tried to isolate the device connected to this port? 

- Have you tried using another device on port 20?

- Have you tried to move this device to another port?

- What is the device connected to this port?

If ever the device is still not updated, please upgrade it to the latest firmware.

I'm looking forward to your reply.

Regards,

John

NETGEAR Community Team

[ricardo_C]

- May I know if you already tried to isolate the device connected to this port? 

I did not

- Have you tried using another device on port 20?

No.

- Have you tried to move this device to another port?
No

- What is the device connected to this port?
A Computer.

If ever the device is still not updated, please upgrade it to the latest firmware.

I did.

Obs. 

Before the NetGear I was using a D-Link on point A and a Tp-Link on poing B connected by SFP port, since the builds is 500m apart each other. I was losing connection between switchs. So I swap the D-Link to NetGear and the problem has been solved. I think it was the D-Link SFP ports the issue. 

Anyhow Flapping is not doing anything to my network at least. I guess.

I was wondering if it is any big issue or not.

Thanks