SFP port up-down-up-down

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.

SFP port up-down-up-down

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
SFP port up-down-up-down
SFP port up-down-up-down
2021-04-23 10:58:30 - last edited 2021-04-23 11:00:19
Hardware Version: V4
Firmware Version: 4.0.5

Port 25  which is SFP with module TL-SM311LM shows events in the log:

17
2021-04-23 12:27:03
Link Scan
level_5
  Gi1/0/25 changed state to up.
18
2021-04-23 12:27:02
Link Scan
level_5
  Gi1/0/25 changed state to down.
19
2021-04-23 12:25:27
Link Scan
level_5
  Gi1/0/25 changed state to up.
20
2021-04-23 12:25:26
Link Scan
level_5
  Gi1/0/25 changed state to down.
21
2021-04-23 12:23:33
Link Scan
level_5
  Gi1/0/25 changed state to up.
22
2021-04-23 12:23:33
Link Scan
level_5
  Gi1/0/25 changed state to down.
23
2021-04-23 12:23:29
Link Scan
level_5
  Gi1/0/25 changed state to up.
24
2021-04-23 12:23:29
Link Scan
level_5
  Gi1/0/25 changed state to down.
25
2021-04-23 12:23:28
Link Scan
level_5
  Gi1/0/25 changed state to up.

and so on...

I replaced SFP module with other, same name, but these log records still shows up. Sometimes ping to the switch rises to >500ms, but devices on the switch does not loose connectivity. No similar records are shown on the other side of link.

What might these errors mean?

 
 
 
 

 

  0      
  0      
#1
Options
1 Reply
Re:SFP port up-down-up-down
2021-04-24 08:28:11

@Vytenis 

I found what was wrong. That link died for good tonight.

The problem was not with switch at all. There was external Copper-FO converter malfunctioning on the other side of the link. Since it was external device, switch did not report any errors in the logfile.

Pitty, its 3rd FO link on that switch and only 2 sfp slots in the switch.Can't get rid off of the converter.

  0  
  0  
#2
Options