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Replacing an MPC

 

Removing an MPC

Before you remove a line card from the router chassis:

When you remove an MPC, the router continues to function, although the interfaces that are installed on the MPC that is being removed no longer function.

An MPC is installed horizontally in the front of the router. MPCs are hot-insertable and hot-removable. A fully configured MPC can weigh up to 31.57 lb. (14.32 kg). Be prepared to accept the full weight of the MPC as you slide the MPC out of the chassis.

Ensure that you have the following parts and tools available to remove an MPC:

  • ESD grounding strap

  • An electrostatic bag or an antistatic mat

  • Have ready a replacement MPC cover and an antistatic mat for the MPC.

    Note

    Placing a line card in an electrostatic bag might require a second person to assist with sliding the line card into the bag.

To remove an MPC (see Figure 1):

  1. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Label the cables connected to each port on the MPC so that you can reconnect the cables to the correct ports later.
  3. Use one of the following methods to take the MPC offline:
    • Press and hold the offline button on the MPC. The green OK/FAIL 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 CLI command, see the CLI Explorer.

  4. Disconnect the cables from the ports that are installed in the MPC. Warning

    Do not look directly into a fiber-optic transceiver or into the ends of fiber-optic cables. Fiber-optic transceivers and fiber-optic cables 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 a cable. The safety cap keeps the port clean and prevents accidental exposure to laser light.

    Caution

    Avoid bending a 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.

  5. Arrange the disconnected cables in the cable manager to prevent the cables from developing stress points.
  6. Simultaneously turn both the ejector handles of the MPC counterclockwise to unseat the MPC.
  7. Grasp the handles, and holding the MPC straight, slide it halfway out of the card cage.Caution

    The MPC and the handles may be hot. Allow a few minutes for the MPC and handles to cool by pulling out the MPC halfway out of the chassis. Wear proper protective, heat-resistant gloves while removing an MPC.

  8. Grasp both sides of the MPC at the midpoint, and remove the MPC from the chassis. Slide the MPC completely out of the chassis, and place the MPC on the antistatic mat or in the electrostatic bag.Caution

    The weight of the MPC is concentrated in the back end. Be prepared to accept the full weight of the MPC—up to 31.57 lb. (14.32 kg)—as you slide the MPC out of the chassis.

    When the MPC is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support the weight of the MPC.

    Do not stack MPCs on top of one another after removal. Place each MPC individually in an electrostatic bag or on its own antistatic mat on a flat, stable surface.

  9. If you are not installing another MPC into the empty card slot within a short time, install an MPC cover over the slot to maintain proper airflow in the card cage.Caution

    After removing an MPC from the chassis, wait at least 30 seconds before replacing it with another MPC, or inserting an MPC into a different slot.

Figure 1: Removing an MPC
Removing an MPC

Installing an MPC

An MPC is installed horizontally in the front of the router. MPCs are hot-insertable and hot-removable. An MPC can weigh up to 31.57 lb (14.32 kg). Be prepared to accept the full weight of the MPC as you slide the MPC out of the chassis.

Ensure that you have the following parts and tools available to install an MPC:

  • ESD grounding strap

  • An electrostatic bag or an antistatic mat

  • Replacement MPC

To install an MPC (see Figure 2):

  1. Attach an ESD grounding strap to your bare wrist, and connect the strap to one of the ESD points on the chassis.
  2. Place the MPC on an antistatic mat.
  3. Locate the slot in the card cage in which you plan to install the MPC.
  4. Orient the MPC so that the faceplate is toward you.
  5. Lift the MPC into place, and carefully align the sides of the MPC with the guides inside the card cage.Caution

    When the MPC is out of the chassis, do not hold it by the ejector handles, bus bars, or edge connectors. They cannot support the weight of the MPC.

  6. Slide the MPC all the way into the card cage until you feel resistance.
  7. Grasp both ejector handles, and simultaneously rotate them clockwise until the MPC is fully seated.
  8. Insert the appropriate cable into the cable connector ports on the MPC. Secure the cables so that they do not support their own weight.

    Place any excess cable out of the way in a neatly coiled loop, using the cable management system. Placing fasteners on a loop helps to maintain the shape of the loop.

    Caution

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

    Caution

    Avoid bending a 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.

You can also verify that the MPC is functioning correctly by using the show chassis fpc and show chassis fpc pic-status commands.

Figure 2: Installing an MPC
Installing an MPC

Installing the Cable Management System

The cable management system is an optional kit that can be ordered to organize and protect optical cabling attached to the line cards. After a card is installed, you can still remove the line card without needing to remove the cable management system.

Ensure that you have the following parts and tools available to install the cable management system on a line card:

  • Phillips (+) screwdriver, number 2

  • The cable management system

To install the cable management system (see Figure 3):

  1. Open the shipping carton of the cable management system and check that you have:
    • Two handle extensions

    • One cable tray

    Figure 3: Cable Management System Components
    Cable Management System
Components
      1
    Handle extensions
      2
    Cable tray
  2. Use the Phillips screwdriver to loosen and remove the screws on the two line card handles (see Figure 4).
    Figure 4: Removing the Screws on the Line Card Handles
    Removing the Screws
on the Line Card  Handles
  3. Replace the blue cap on each line card handle with the two handle extensions (see Figure 5).
    Figure 5: Adding Handle Extensions
    Adding Handle Extensions
  4. Tighten the screws into the handle extensions.
  5. Snap open the blue clips on the ends of the cable tray with your hands.
  6. Place the cable tray across the front of the line card so that the two ends of the cable tray are under the handle extensions.
  7. Snap close the blue clips of the cable tray around the handle extensions (see Figure 6).
    Figure 6: Adding the Cable Tray
    Adding the Cable Tray
  8. Drape the optical cables using one of the following methods:

    • Drape and tie the optical cables to the side (see Figure 7).

    • Drape some of the cables under the handle extension and some cables over the handle extension.

    Figure 7: Completed Cable Management System
    Completed Cable Management
System