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[Junos] Interface with QSFP-100GBASE-ER4L optics does not come up

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Article ID: KB33461 KB Last Updated: 28 May 2019Version: 1.0
Summary:

Interface with QSFP-100GBASE-ER4L optics does not come up because QSFP-100G-ER4L is not supported in certain Junos releases.

Symptoms:

Interface with a QSFP-100GBASE-ER4L optics shows Laser bias current as zero:


show interfaces diagnostics optics et-1/1/5
Physical interface: et-1/1/5
Module temperature                        :  27 degrees C / 81 degrees F
Module voltage                            :  3.3060 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   :  79 degrees C / 174 degrees F
Module temperature low alarm threshold    :  -4 degrees C / 25 degrees F
Module temperature high warning threshold :  75 degrees C / 167 degrees F
Module temperature low warning threshold  :  0 degrees C / 32 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    :  19.999 mA
Laser bias current high warning threshold :  119.999 mA
Laser bias current low warning threshold  :  29.999 mA
Laser output power high alarm threshold   :  2.1877 mW / 3.40 dBm
Laser output power low alarm threshold    :  0.4570 mW / -3.40 dBm
Laser output power high warning threshold :  1.9498 mW / 2.90 dBm
Laser output power low warning threshold  :  0.5128 mW / -2.90 dBm
Laser rx power high alarm threshold       :  0.5623 mW / -2.50 dBm
Laser rx power low alarm threshold        :  0.0040 mW / -23.98 dBm
Laser rx power high warning threshold     :  0.4466 mW / -3.50 dBm
Laser rx power low warning threshold      :  0.0064 mW / -21.94 dBm
Lane 0
Laser bias current                        :  0.000 mA
Laser output power                        :  0.000 mW / - Inf dBm
Laser receiver power                      :  0.000 mW / - Inf dBm

Laser bias current high alarm             :  Off
Laser bias current low alarm              :  On
Laser bias current high warning           :  Off
Laser bias current low warning            :  On
Laser receiver power high alarm           :  Off
Laser receiver power low alarm            :  On
Laser receiver power high warning         :  Off
Laser receiver power low warning          :  On
Tx loss of signal functionality alarm     :  Off
Rx loss of signal alarm                   :  Off
Tx laser disabled alarm                   :  Off
Lane 1
Laser bias current                        :  0.000 mA
Laser output power                        :  0.000 mW / - Inf dBm
Laser receiver power                      :  0.000 mW / - Inf dBm

Laser bias current high alarm             :  Off
Laser bias current low alarm              :  On
Laser bias current high warning           :  Off
Laser bias current low warning            :  On
Laser receiver power high alarm           :  Off
Laser receiver power low alarm            :  On
Laser receiver power high warning         :  Off
Laser receiver power low warning          :  On
Tx loss of signal functionality alarm     :  Off
Rx loss of signal alarm                   :  Off
Tx laser disabled alarm                   :  Off
Lane 2
Laser bias current                        :  0.000 mA
Laser output power                        :  0.000 mW / - Inf dBm
Laser receiver power                      :  0.000 mW / - Inf dBm

Laser bias current high alarm             :  Off
Laser bias current low alarm              :  On
Laser bias current high warning           :  Off
Laser bias current low warning            :  On
Laser receiver power high alarm           :  Off
Laser receiver power low alarm            :  On
Laser receiver power high warning         :  Off
Laser receiver power low warning          :  On
Tx loss of signal functionality alarm     :  Off
Rx loss of signal alarm                   :  Off
Tx laser disabled alarm                   :  Off
Lane 3
Laser bias current                        :  0.000 mA
Laser output power                        :  0.000 mW / - Inf dBm
Laser receiver power                      :  0.000 mW / - Inf dBm

Laser bias current high alarm             :  Off
Laser bias current low alarm              :  On
Laser bias current high warning           :  Off
Laser bias current low warning            :  On
Laser receiver power high alarm           :  Off
Laser receiver power low alarm            :  On
Laser receiver power high warning         :  Off
Laser receiver power low warning          :  On
Tx loss of signal functionality alarm     :  Off


Physical interface: et-1/1/5, Enabled, Physical link is Down
Cause:

QSFP-100G-ER4L may be not supported by this particular JUNOS release.

Solution:

ER4L is supported in Junos 17.3R1, but support for this QSFP is in for prior releases such as 17.2R2, 17.1R3, 16.2R2, 15.1F6-S7, and 16.1R4-S4.

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