Taking a Control Board Offline in a QFX3008-I Interconnect Device

If you are going to remove a Control Board from a QFX3008-I Interconnect device, take the Control Board offline before you remove it to preserve its configuration.

The Control Board performs Routing Engine functions in a QFX3008-I Interconnect device. There are two Control Boards installed in a QFX3008-I Interconnect device.

Caution: When you switch Control Board mastership, or when a master Control Board fails, no data traffic is forwarded over the QFX3008-I Interconnect device. Data traffic over other QFX3008-I Interconnect devices in your QFX3000 QFabric system is not disrupted.

Note: We recommend that you take the backup Control Board offline before removing it.

Before you offline a Control Board:

• Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage. See Prevention of Electrostatic Discharge Damage.
• Ensure that you do not need to forward traffic through the device.
• Determine whether the Control Board is the master or backup using one of these methods:
  • Check the MASTER LED on the Control Board faceplate. If the MASTER LED is lit steady green, the Control Board is the master.
  • Issue the show chassis routing-engine CLI command.

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
• An RJ-45 to DB-9 rollover cable to connect the external management device to the console (CON) port

To take the Control Board offline in a QFX3008-I Interconnect device, perform the tasks appropriate for your device:

1. Taking a Master Control Board Offline
2. Taking a Backup Control Board Offline

Taking a Master Control Board Offline

1. Connect a management device to the console (CONSOLE) port on the master Control Board in the QFX3008-I Interconnect device. For instructions about connecting a management device to the console (CONSOLE) port, see Connecting a QFX Series Device to a Management Console.
2. Make the master Control Board the backup Control Board by using the request chassis routing-engine master switch CLI command.

   The current backup Control Board becomes the master Control Board after this command is issued.

   Caution: Until the backup Control Board assumes mastership, no data traffic is forwarded over the QFX3008-I Interconnect device. Data traffic over other QFX3008-I Interconnect devices in your QFX3000 QFabric system is not disrupted.

3. Use the show chassis routing-engine command to confirm that mastership has changed.
4. Connect the management device to the console (CONSOLE) port on the new master Control Board in the QFX3008-I Interconnect device.
5. Take the backup Control Board offline using the request system halt other-routing-engine CLI command.
6. Use the show chassis routing-engine command to confirm that the Control Board is offline. When the state field in the command output shows that the card is offline, it is safe to remove the Control Board. See Removing a Control Board from a QFX3008-I Interconnect Device.

Taking a Backup Control Board Offline

1. Connect a management device to the console (CONSOLE) port on the master Control Board in the QFX3008-I Interconnect device. For instructions about connecting a management device to the console (CONSOLE) port, see Connecting a QFX Series Device to a Management Console.
2. Take the backup Control Board offline using the request system halt other-routing-engine CLI command.
3. Use the show chassis routing-engine command to confirm that the Control Board is offline. When the state field in the command output shows that the card is offline, it is safe to remove the Control Board. See Removing a Control Board from a QFX3008-I Interconnect Device.