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QFX5700 Routing and Control Board Maintenance

Maintaining an QFX5700 switch includes removing and installing the Routing and Control board.

The QFX5700 switch is shipped with one Routing and Control Board(RCB) preinstalled in the chassis, depending on the configuration. You can install the RCB in one of the two top slots on the front of the chassis.

Note:

QFX5700 does not support RCB and FEB redundancy. A QFX5700 system can only have one RCB and one FEB installed, either in slot 0 or slot 1. You must install the FEB and RCB in the same slots; hence, if the RCB is in slot 0, the FEB must also be in slot 0. Additionally, the FEB must be in slot 1 if the RCB is also there in slot 1. The system will not work if the RCB and FEB are inserted into the wrong slots, and a serious warning message stating "Major FEB 1 Mismatch with master RCB" would appear.

To remove or install an RCB, read the following sections.

Remove the Routing and Control Board from the QFX5700 Switch

Before you remove an RCB, ensure that you have an electrostatic discharge (ESD) grounding strap.

To remove an RCB:

  1. Take the RCB offline.
  2. Place an antistatic bag or antistatic mat on a flat, stable surface.
  3. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to one of the ESD points on the chassis.
  4. Grasp both ejector handles, spread them apart, and slide the RCB about halfway out of the chassis See Figure 1.
    Figure 1: Removing an RCB from the QFX5700 Switch Technical diagram of Juniper Networks QFX5700 switch, showing front view with Routing Engine Control Board, Line Cards, Fan Modules, and FPC slots. Green arrows indicate component removal or insertion.
  5. Grasp the ejector handle with one hand, and place your other hand under the RCB for support as you slide it completely out of the chassis.
  6. Place the RCB on the antistatic mat.
  7. If you are not replacing the RCB immediately, install a cover in the empty slot.

Install the Routing and Control Board in the QFX5700 Switch

In You need to install an RCB before removing a failing RCB, to prevent the switch from shutting down.

Before you install an RCB, ensure that you have an electrostatic discharge (ESD) grounding strap.

To install an RCB:

  1. Wrap and fasten one end of the ESD grounding strap around your bare wrist, and connect the other end of the strap to one of the ESD points on the chassis.
  2. If an RCB blank (JNP5K-RCB-BLNK) is installed, press the handles on the blank and gently pull out the blank from the slot (see Figure 2) or remove the failing RCB (see Remove the Routing and Control Board from the QFX5700 Switch).
    Figure 2: Removing the RCB Blank Removing the RCB Blank
  3. Remove the new RCB from the antistatic bag, and inspect it for any damage before installing it in the chassis.
  4. Lift the RCB by its sides, being careful not to bump the connectors.
  5. Carefully align the sides of the RCB with the guides inside the chassis.
  6. Slide the RCB into the chassis, carefully ensuring that it is correctly aligned.
  7. Grasp the two ejector handles, and fold them inward until they latch to seat the RCB. See Figure 3.
    Figure 3: Installing an RCB Juniper Networks QFX5700 switch showing Routing Engine Control Board insertion or removal with green directional arrows.

    The RCB begins the power-on sequence when fully seated.

  8. To verify that the RCB is functioning normally, check the PWR LED and the STS LED on its faceplate. Both LEDs should light steadily, shortly after the RCB is installed. If the PWR LED is blinking red, the available power might be insufficient.

    Another method of verifying that the RCB is online is to use the following CLI command: