Installing an FPC

To install an FPC, follow this procedure (see Figure 88 and Figure 89):

1. Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect the strap to one of the ESD points on the chassis. Make sure the router is attached to a proper earth ground. For more information about ESD, see Preventing Electrostatic Discharge Damage.
2. Verify that the ends of the ejector levers, which are located at each end of the FPC, are pushed outward, nearly perpendicular to the face of the FPC.
3. Grasp the front of the FPC with one hand and place the other hand under the FPC to support it.

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

4. Align the rear bottom corners of the FPC with the guides at the bottom of the FPC slot. Slide the FPC into the card cage until it contacts the midplane.
5. Push the ends of the ejector levers inward until they are nearly flush with the face of the FPC.
6. Tighten the thumbscrew at each end of the FPC to seat the FPC securely in the chassis.
7. If you are installing different PICs in the FPC, follow this procedure for each one:
   1. If the PIC uses fiber-optic cable, verify that there is a rubber safety cap over each transceiver on the faceplate. Install a cap if necessary.
   2. Slide the PIC into a slot in the FPC, aligning the notches in the connector at the rear of the PIC with the notches in the FPC slot and then firmly pushing the PIC into place.

      Insert the PIC straight into the FPC slot to avoid damaging the components on the bottom of the PIC.

   3. Tighten the thumbscrews at the ends of the PIC faceplate simultaneously and at about the same rate (tightening the two screws alternately or at very different rates can cause the PIC to become lodged in the FPC slot, making it difficult to turn the screws). Verify that the PIC is seated properly.
8. If any of the PICs on the FPC connect to fiber-optic cable, remove the rubber safety cap from each transceiver and cable.

   Do not look directly into the ends of fiber-optic cables or into the transceivers on the interface faceplate. Single-mode fiber-optic cable and the interfaces that use it (such as ATM and SONET/SDH interfaces) emit laser light that can damage your eyes.

9. Insert the appropriate cable into the cable connector ports on each PIC on the FPC. Secure the cables so that they are not supporting their own weight. Place excess cable out of the way in a neatly coiled loop, using the cable management system. Placing fasteners on a loop helps to maintain its shape.

   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.

   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.

10. Use one of the following methods to bring the FPC online:
    • Press and hold the FPC offline button until the green OK LED next to the button lights steadily, in about 5 seconds. The LEDS and offline button for each FPC are located directly above it on the craft interface.
    • Issue the following CLI command:
      user@host>request chassis fpc slot slot-number online

      For more information about the command, see the JUNOS Internet Software Operational Mode Command Reference: Protocols, Class of Service, Chassis, and Management.

    As the FPC comes online, the green FPC LED labeled OK begins to blink. It continues to blink while the Routing Engine downloads software to the FPC, the FPC runs its diagnostics, and the PICs housed in the FPC are enabled. Packet forwarding then halts for about 200 ms while the Packet Forwarding Engine incorporates the memory on the new FPC into the memory buffers shared by all FPCs. When the FPC is online, the OK LED lights steadily.

    After the OK LED lights steadily, wait at least 30 seconds before removing the FPC again, removing a FPC from a different slot, or inserting an FPC in a different slot.

You can also verify correct FPC and PIC functioning by issuing the show chassis fpc and show chassis fpc pic-status commands described in Maintaining FPCs and Maintaining PICs and PIC Cables.