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QFX5700 Routing and Control Board Maintenance

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

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

When you power on a switch with a single RCB preinstalled in it, the RCB comes online as the primary RCB. The primary RCB powers on the Forwarding Engine Boards (FEBs) and the Flexible PIC Concentrator (FPC). If you install the second RCB, it powers up and the Routine Engine comes online in the backup mode.

When you power on a switch for the first time with two RCBs installed, the RCB installed in slot 0 comes online as the primary RCB and powers on the FEBs and the FPCs. The RCB installed in slot 1 comes online as the backup RCB by default. You can change this configuration by using the CLI.

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

Remove the Routing and Control Board from the QFX5700 Switch

In redundant configurations, the Routing and Control Board (RCB) in a QX5700 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). In base configurations, you need to install a second RCB before removing a failing RCB, to prevent the switch from shutting down. We recommend that you take base system offline before replacing the RCB.

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

CAUTION:

In base configurations, removal of the RCB causes the system to shut down. In redundant configurations, removal of the RCB causes the system to reboot and start the election process for a new primary RCB.

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 Removing an RCB from the QFX5700 Switch
  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 redundant configurations, the Routing and Control Board (RCB) in a QFX5700 switch is a hot-removable and hot-insertable field-replaceable unit (FRU). In base configurations, you need to install a second 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 in redundant configurations 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 Installing an RCB

    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: