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1000BaseLX SFP plugged in, no fiber connected but still shows up/up.

tporembski
Level 1
Level 1

This is what I have..

Switch Ports Model SW Version SW Image Mode
------ ----- ----- ---------- ---------- ----
* 1 28 WS-C3650-24PD 03.06.04.E cat3k_caa-universalk9 INSTALL

NAME: "GigabitEthernet1/1/1", DESCR: "1000BaseLX SFP"
PID: GLC-LH-SMD , VID: V01 , SN: AVJ2208351Z

 

The sfp is plugged in and shows up/up but there is no fiber connected.  how is this possible or am I looking at defective SFP?

3 Replies 3

Leo Laohoo
Hall of Fame
Hall of Fame

Reboot the switch.

rebooted and upgraded IOS, no difference.

Please cold-reboot the switch (remove the power cables until the power supplies stop screaming).

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