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    将 T4000 路由器连接到外部时钟设备

    要将路由器连接到一个或两个外部时钟设备,请将带 RJ-48 连接器的电缆连接到 SCG 上的某个 EXTERNAL CLOCK INPUTS 端口。

    1. 将静电放电 (ESD) 接地腕带绑到裸露的手腕上,然后将腕带连接到机箱上的某个 ESD 点。
    2. 将电缆的一端插入 SCG 上相应的 EXTERNAL CLOCK INPUTS 端口。
    3. 将电缆的另一端插入 T1 外部时钟设备。
    4. 对 SCG 上的其他 EXTERNAL CLOCK INPUTS 端口重复此过程。
    5. 验证每个端口的 LINK LED 绿色常亮。
    6. 配置端口。 请参阅 同步 语句(对于 M系列和 T 系列)(Junos OS 系统基础配置指南)。
    7. 输入 show chassis synchronization 命令以检查端口的状态。
      user@host> show chassis synchronization
          Clock Synchronization Status :
            Clock module on SCG 0
              Current state            : master
              Current clock state      : locked to external-a
                Selected for           : 2 hours, 28 minutes, 4 seconds
                Selected since         : 2006-02-17 01:12:58 PST
              Configured sources
                Source      Priority   Deviation    Last deviation   Status
                                       (in ppm)     (in ppm)
                external-a  primary    measuring    -0.10            in-use
                external-b  secondary  -0.10        -0.10            qualified
          Clock Synchronization Status :
            Clock module on SCG 1
              Current state            : backup
              Current clock state      : locked to master SCG
                Selected for           : 19 hours, 49 minutes, 14 seconds
                Selected since         : 2006-02-16 07:51:48 PST
              Configured sources
                Source      Priority   Deviation    Last deviation   Status
                                       (in ppm)     (in ppm)
                external-a  primary    -0.25        -0.25            qualified
                external-b  secondary  -0.25        -0.25            qualified
      

    Published: 2014-02-19