EX-2200 and EX-3300 series switches running 12.3R3.4 have a bug where Receiver signal average optical power values don’t display correctly. The recommended version that contains a fix for this bug is12.3R4-S1. We’ve tested this update on a few switches and it had resolved the bug.

12.3R3.4:

user@j33s> show interfaces diagnostics optics ge-0/1/0
Physical interface: ge-0/1/0
Laser bias current : 5.566 mA
Laser output power : 0.2820 mW / -5.50 dBm
Module temperature : 31 degrees C / 88 degrees F
Module voltage : 3.3680 V
Receiver signal average optical power : 0.0000 mW / - Inf dBm

12.3R4-S1:

user@j33> show interfaces diagnostics optics ge-0/1/0
Physical interface: ge-0/1/0
Laser bias current : 5.508 mA
Laser output power : 0.2810 mW / -5.51 dBm
Module temperature : 31 degrees C / 88 degrees F
Module voltage : 3.3680 V
Receiver signal average optical power : 0.2811 mW / -5.51 dBm