我们一直面临瞻博网络 MX 系列路由器的问题。我们的路由器上有10G接口。不管接口是接DWDM还是接口本身是一根暗光纤都没有关系。最后的问题是一样的。

问题是 10G 接口停止传输输出光功率，而 XFP / SFP+ 正在接收光功率。使用 cli 命令“”的输出可以观察到这一点show interface diagnostics optics。

下面是这种情况下接口的输出。

Physical interface: xe-3/3/0
    Laser bias current                        :  0.000 mA
    Laser output power                        :  0.0000 mW / - Inf dBm <----
    Module temperature                        :  29 degrees C / 85 degrees F
    Laser rx power                            :  0.0086 mW / -20.66 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 output power high alarm             :  Off
    Laser output power low alarm              :  On
    Laser output power high warning           :  Off
    Laser output power low warning            :  On
    Module temperature high alarm             :  Off
    Module temperature low alarm              :  Off
    Module temperature high warning           :  Off
    Module temperature low warning            :  Off
    Laser rx power high alarm                 :  Off
    Laser rx power low alarm                  :  On
    Laser rx power high warning               :  Off
    Laser rx power low warning                :  On
    Module not ready alarm                    :  Off
    Module power down alarm                   :  Off
    Tx data not ready alarm                   :  Off
    Tx not ready alarm                        :  Off
    Tx laser fault alarm                      :  Off
    Tx CDR loss of lock alarm                 :  Off
    Rx not ready alarm                        :  On
    Rx loss of signal alarm                   :  Off
    Rx CDR loss of lock alarm                 :  Off

现在，如果尝试使用'set interface xe-3/3/0 disable'然后提交并再次'delete interface xe-3/3/0 disable'然后提交来反弹接口，接口开始传输输出功率。

Physical interface: xe-3/3/0
    Laser bias current                        :  41.372 mA
    Laser output power                        :  1.1160 mW / 0.48 dBm <----
    Module temperature                        :  30 degrees C / 85 degrees F
    Laser rx power                            :  0.0088 mW / -20.56 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 output power high alarm             :  Off
    Laser output power low alarm              :  Off
    Laser output power high warning           :  Off
    Laser output power low warning            :  Off
    Module temperature high alarm             :  Off
    Module temperature low alarm              :  Off
    Module temperature high warning           :  Off
    Module temperature low warning            :  Off
    Laser rx power high alarm                 :  Off
    Laser rx power low alarm                  :  On
    Laser rx power high warning               :  Off
    Laser rx power low warning                :  On
    Module not ready alarm                    :  On
    Module power down alarm                   :  Off
    Tx data not ready alarm                   :  On
    Tx not ready alarm                        :  On
    Tx laser fault alarm                      :  Off
    Tx CDR loss of lock alarm                 :  On
    Rx not ready alarm                        :  On
    Rx loss of signal alarm                   :  Off
    Rx CDR loss of lock alarm                 :  Off

需要了解什么情况下接口停止传输输出光功率？为什么恢复需要人工干预？根据观察，在此无输出功率阶段之前，Juniper MX 上的 syslog 消息中已经看到过度的接口抖动。