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Adding or Replacing an Interconnect Device in a QFX3000-M QFabric System

The Director group in a QFabric system automatically recognizes when devices are added or replaced in the QFabric system. The Director group sends each device its own portion of the Junos OS configuration and adds the device to the QFabric system inventory.

Before You Begin

Before you add or replace a QFX3600-I Interconnect device in a QFX3000-M QFabric system:

  • Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.

  • If possible, install the replacement QFX5100-24Q or QFX3600-I Interconnect device and connect it to power to minimize the amount of time it takes to replace the device.

Ensure that you have the following parts and tools available to power off the device:

  • An ESD grounding strap

  • An external management device such as a PC

Powering Off an Interconnect Device on a QFX3000-M QFabric System

Use this procedure to gracefully shut down an existing Interconnect device or to install a new Interconnect device in a QFX3000-M QFabric System. This orderly process prevents traffic loss on the Interconnect device. The QFX3000-M QFabric System supports the QFX5100-24Q configured as an Interconnect device and the QFX3600-I Interconnect device.

  1. Log into the QFabric default partition on the Director device and start the CLI.
  2. Discover the device connection status and the alias name (identifier) by issuing the show fabric administration inventory command.

    The Interconnect device must show as connected and configured in order to have an orderly shutdown.

  3. Start the orderly shutdown of either the QFX5100-24Q or the QFX3600-I Interconnect device by issuing the request fabric administration power-off interconnect-device operational mode command from the QFabric default partition CLI. This command systematically takes the interconnect offline and gracefully shuts down the device while preserving system state information. A message appears on the console or console log, confirming that the operating system has stopped on the device.

    You see the following output after entering the command:

    CAUTION:

    The final output of the request fabric administration power-off interconnect-device command is the following message:The device is shutting down and can be removed when the LCDs are off. Wait at least 3 to 4 minutes after first seeing this message before following the instructions in Step 4 and Step 5 to power off the switch.

  4. Disconnect power to the switch by performing one of the following tasks:
    • AC power supply—If the AC power source outlet has a power switch, set it to the OFF (O) position. If the AC power source outlet does not have a power switch, gently pull out the plug end of the power cord connected to the power source outlet.

    • DC power supply—Switch the circuit breaker on the panel board that services the DC circuit to the OFF position.

  5. Remove the power source cable from the power supply faceplate:
    • AC power supply—Remove the power cord from the power supply faceplate by detaching the power cord retainer and gently pulling out the socket end of the power cord connected to the power supply faceplate.

    • DC power supply—Remove the screws securing the ring lugs attached to the power source cables to the power supply using the screwdriver, and remove the power source cables from the power supply. Replace the screws on the terminals and tighten them.

Adding a New Interconnect Device

After power is removed from the old Interconnect device, prepare the new Interconnect device.

  1. Ensure the new Interconnect device is in Interconnect device mode. By default, QFX5100-24Q and QFX3600 switches are configured in standalone mode. Convert the switch to a Node device and then, in turn, convert the Node device to an Interconnect device. See Converting the Device Mode for a QFabric System Component.
  2. Shut down the new device using the request system power-off command.
  3. Connect the new Interconnect device to the QFabric system control plane network.
  4. Connect power to the new Interconnect device to connect to the fabric. For information on connecting power for your Interconnect device, see:
  5. Verify that the new device has been upgraded to the correct version of software using the show version component all operational mode command from the QFabric default partition CLI.
    Note:

    It takes some time for the software upgrade to occur. Do not proceed to the next step until the show version component all command verifies that the software has been upgraded.

  6. Verify that the new device is inserted into the fabric using the show fabric administration inventory operational mode command from the QFabric default partition CLI.
  7. From the QFabric director, enter the following configuration mode CLI commands to remove the previous Interconnect device from the inventory of QFabric system components and associate the serial number of the new device with the alias of the previous device.
  8. Commit the changes using the commit command, which sends the configuration of the old device to the new device.
    Note:

    We recommend waiting at least five minutes before proceeding to the next step.

  9. Connect the new Interconnect device to each Node for data plane interconnection.
  10. Verify the data plane interconnection using the show chassis fabric connectivity operational mode command from the QFabric default partition CLI. Repeat this command if necessary until the new device is shown in the output.