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Replacing a Cable on an MX2020 MPC or MIC

 

Removing a Cable on an MX2020 MPC or MIC

Removing and installing cables on an MPC or a MIC does not affect router function, except that the component does not receive or transmit data while its cable is disconnected.

To remove a fiber-optic cable:

  1. If the component connects to fiber-optic cable, have ready a rubber safety cap for each cable and transceiver.
  2. If removing all cables connected to the component, use one of the following methods to take the component offline:
    • To take an MPC offline:

      • Press and hold the corresponding online button on the craft interface. The green OK LED next to the button begins to blink. Hold the button down until the LED goes off.

      • Issue the following CLI command:

        user@host>request chassis fpc slot slot-number offline

        For more information about the command, see the Junos OS System Basics and Services Command Reference  .

        Note

        When issuing the request chassis fpc offline command, the FRU will lose power, and the system total power will increase.

    • To take a MIC offline:

      • Press the online/offline button on the MIC. Use a narrow-ended tool that fits inside the opening that leads to the button. Press and hold the button until the MIC LED goes off (about 5 seconds).

      • Issue the following CLI command:

        user@host> request chassis mic fpc-slot fpc-slot mic-slot mic-slot offline

        For more information about the command, see the Junos OS System Basics and Services Command Reference  .

  3. Unplug the cable from the cable connector port. If the MIC uses fiber-optic cable, immediately cover each transceiver and the end of each cable with a rubber safety cap.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  4. Remove the cable from the cable manager, and detach it from the destination port.

Installing a Cable on an MX2020 MPC or MIC

To install a MIC or an MPC cable (see Figure 1 and Figure 2):

  1. Have ready a length of the type of cable used by the component. For cable specifications, see the MX Series Interface Module Reference.
  2. If the cable connector port is covered by a rubber safety cap, remove the cap.Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cable connected to a transceiver emit laser light that can damage your eyes.

    Caution

    Do not leave a fiber-optic transceiver uncovered except when inserting or removing cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

  3. Insert the cable connector into the cable connector port on the component faceplate.
    Figure 1: Installing a MIC Cable
    Installing a MIC Cable
    Figure 2: Installing an MPC Cable
    Installing an MPC Cable
  4. Arrange the cable in the cable manager to prevent it from dislodging or developing stress points. Secure the cable so that it is not supporting its own weight as it hangs to the floor. Place excess cable out of the way in a neatly coiled loop. Placing fasteners on the loop helps to maintain its shape.Caution

    Avoid bending fiber-optic cable beyond its minimum bend radius. An arc smaller than a few inches in diameter can damage the cable and cause problems that are difficult to diagnose.

    Caution

    Do not let fiber-optic cable hang free from the connector. Do not allow fastened loops of cable to dangle, which stresses the cable at the fastening point.

  5. Insert the other end of the cable into the destination port.
  6. Repeat the previous steps for any additional cables.
  7. If the component is offline (its failure indicator LED is lit), use one of the following methods to bring it online.
    • To bring an MPC online:

      • Press and hold the corresponding online button on the craft interface until the green OK LED next to the button lights steadily, in about 5 seconds.

      • Issue the following CLI command:

        user@host>request chassis fpc slot slot-number online

        For more information about the command, see the Junos OS System Basics and Services Command Reference  .

        Note

        When issuing the request chassis fpc online command, the FRU will get power, and the system total power will decrease.

    • To bring a MIC online:

      • Press the MIC offline/online button until the MIC LED lights green.

      • Issue the following CLI command:

        user@host>request chassis mic fpc-slot fpc-slot mic-slot mic-slot online

        For more information about the command, see the Junos OS System Basics and Services Command Reference  .

    The normal functioning indicator LED confirms that the component is online. You can also verify correct MPC functioning by issuing the show chassis fpc command or the correct MIC functioning by issuing the show chassis fpc pic-status command.