Hi spuluka,
Many thanks for you response
Please see below for output from requested commands
Switch1
et-0/0/50 up down
et-0/0/50.0 up down eth-switch
show interfaces diagnostics optics et-0/0/50
Physical interface: et-0/0/50
Module temperature : 35 degrees C / 95 degrees F
Module voltage : 3.2670 V
Module temperature high alarm : Off
Module temperature low alarm : Off
Module temperature high warning : Off
Module temperature low warning : Off
Module voltage high alarm : Off
Module voltage low alarm : Off
Module voltage high warning : Off
Module voltage low warning : Off
Module temperature high alarm threshold : 78 degrees C / 172 degrees F
Module temperature low alarm threshold : -8 degrees C / 18 degrees F
Module temperature high warning threshold : 73 degrees C / 163 degrees F
Module temperature low warning threshold : -3 degrees C / 27 degrees F
Module voltage high alarm threshold : 3.6300 V
Module voltage low alarm threshold : 2.9700 V
Module voltage high warning threshold : 3.4640 V
Module voltage low warning threshold : 3.1340 V
Laser bias current high alarm threshold : 129.999 mA
Laser bias current low alarm threshold : 9.999 mA
Laser bias current high warning threshold : 124.999 mA
Laser bias current low warning threshold : 14.999 mA
Laser output power high alarm threshold : 6.5464 mW / 8.16 dBm
Laser output power low alarm threshold : 0.6026 mW / -2.20 dBm
Laser output power high warning threshold : 5.7544 mW / 7.60 dBm
Laser output power low warning threshold : 0.7586 mW / -1.20 dBm
Laser rx power high alarm threshold : 6.5464 mW / 8.16 dBm
Laser rx power low alarm threshold : 0.0562 mW / -12.50 dBm
Laser rx power high warning threshold : 6.4565 mW / 8.10 dBm
Laser rx power low warning threshold : 0.0708 mW / -11.50 dBm
Laser temperature high alarm threshold : 0 degrees C / 32 degrees F
Laser temperature low alarm threshold : 0 degrees C / 32 degrees F
Laser temperature high warning threshold : 0 degrees C / 32 degrees F
Laser temperature low warning threshold : 0 degrees C / 32 degrees F
Lane 0
Laser bias current : 102.804 mA
Laser output power : 2.731 mW / 4.36 dBm
Laser receiver power : 0.747 mW / -1.27 dBm
Laser bias current high alarm : Off
Laser bias current low alarm : Off
Laser bias current high warning : Off
Laser bias current low warning : Off
Laser receiver power high alarm : Off
Laser receiver power low alarm : Off
Laser receiver power high warning : Off
Laser receiver power low warning : Off
Tx loss of signal functionality alarm : Off
Rx loss of signal alarm : Off
Tx laser disabled alarm : Off
Switch 2
et-0/0/50 up down
et-0/0/50.0 up down eth-switch
show interfaces diagnostics optics et-0/0/50
Physical interface: et-0/0/50
Module temperature : 31 degrees C / 87 degrees F
Module voltage : 3.2800 V
Module temperature high alarm : Off
Module temperature low alarm : Off
Module temperature high warning : Off
Module temperature low warning : Off
Module voltage high alarm : Off
Module voltage low alarm : Off
Module voltage high warning : Off
Module voltage low warning : Off
Module temperature high alarm threshold : 78 degrees C / 172 degrees F
Module temperature low alarm threshold : -8 degrees C / 18 degrees F
Module temperature high warning threshold : 73 degrees C / 163 degrees F
Module temperature low warning threshold : -3 degrees C / 27 degrees F
Module voltage high alarm threshold : 3.6300 V
Module voltage low alarm threshold : 2.9700 V
Module voltage high warning threshold : 3.4640 V
Module voltage low warning threshold : 3.1340 V
Laser bias current high alarm threshold : 129.999 mA
Laser bias current low alarm threshold : 9.999 mA
Laser bias current high warning threshold : 124.999 mA
Laser bias current low warning threshold : 14.999 mA
Laser output power high alarm threshold : 6.5464 mW / 8.16 dBm
Laser output power low alarm threshold : 0.6026 mW / -2.20 dBm
Laser output power high warning threshold : 5.7544 mW / 7.60 dBm
Laser output power low warning threshold : 0.7586 mW / -1.20 dBm
Laser rx power high alarm threshold : 6.5464 mW / 8.16 dBm
Laser rx power low alarm threshold : 0.0562 mW / -12.50 dBm
Laser rx power high warning threshold : 6.4565 mW / 8.10 dBm
Laser rx power low warning threshold : 0.0708 mW / -11.50 dBm
Laser temperature high alarm threshold : 0 degrees C / 32 degrees F
Laser temperature low alarm threshold : 0 degrees C / 32 degrees F
Laser temperature high warning threshold : 0 degrees C / 32 degrees F
Laser temperature low warning threshold : 0 degrees C / 32 degrees F
Lane 0
Laser bias current : 107.335 mA
Laser output power : 2.061 mW / 3.14 dBm
Laser receiver power : 0.822 mW / -0.85 dBm
Laser bias current high alarm : Off
Laser bias current low alarm : Off
Laser bias current high warning : Off
Laser bias current low warning : Off
Laser receiver power high alarm : Off
Laser receiver power low alarm : Off
Laser receiver power high warning : Off
Laser receiver power low warning : Off
Tx loss of signal functionality alarm : Off
Rx loss of signal alarm : Off
Tx laser disabled alarm : Off
Kind regards
Richard
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RICHARD THOMPSON
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Original Message:
Sent: 08-21-2023 11:43
From: spuluka
Subject: 100Gbps single mode Lane 0 down
Could you share the output for these test commands on the two linked interfaces.
show interface terse
show interfaces diagnostics optics
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Steve Puluka BSEET - Juniper Ambassador
IP Architect - DQE Communications Pittsburgh, PA (Metro Ethernet & ISP - Retired)
http://puluka.com/home
Original Message:
Sent: 08-21-2023 08:34
From: RICHARD THOMPSON
Subject: 100Gbps single mode Lane 0 down
greetings Junos Guru's
I was wondering if you could assist me?
I have 2 x 4650 ex (VC) switches on the latest firmware connected via single mode fibre.
The connection was stable for 4 days with the FEC disabled on both sides but has suddenly dropped and not come back
I have checked the laser rx/rx and all looks ok
the qsfp28 is a QSFP28-BIDI-LR (single lane)
any advice for where i can start to tackle this issue?
thanks
Richard
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RICHARD THOMPSON
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