Technical Documentation
Removing a Control Board from a QFX3008-I Interconnect Device
There are two Control Boards in a QFX3008-I Interconnect device. The Control Boards install horizontally in the rear of the chassis in the slots labeled CB 0 and CB 1. See Slot Numbering for a QFX3008-I Interconnect Device.
 | Caution: Before you remove a Control Board, we recommend that you first take it offline. It is important to know whether you are removing the master or the backup Control Board. See Taking a Control Board Offline in a QFX3008-I Interconnect Device for more information. |
| Caution: When you switch Control Board mastership, or when a master Control Board fails, traffic is not forwarded over the QFX3008-I Interconnect device until the backup Control Board assumes mastership. |
| Caution: Do not lift modules by holding the ejector levers. The levers cannot support the weight of the module. Lifting the module by the levers might bend the levers, and the bent levers prevent the board from being properly seated in the chassis. |
Before you begin to remove a Control Board:
- Ensure that you understand how to prevent ESD damage. See Prevention of Electrostatic Discharge Damage.
- (Recommended) Take the Control Board offline. See Taking a Control Board Offline in a QFX3008-I Interconnect Device.
Ensure that you have the following parts and tools available to remove a Control Board from a QFX3008-I Interconnect device:
- Electrostatic discharge (ESD) grounding strap
- Antistatic bag or antistatic mat
- Replacement Control Board
To remove a Control Board from a QFX3008-I Interconnect device (see Figure 1):
- Attach the ESD grounding strap to your bare wrist, and connect the strap to the ESD point on the chassis.
- Place the antistatic bag or antistatic mat on a flat, stable surface.
- Pull both the ejector levers outward simultaneously, away from the faceplate of the Control Board, until they go no further. This action causes the Control Board to slide out of the chassis slightly.
- Grasp the ejector levers and pull the Control Board out about halfway.
- Taking care not to touch the leads, pins, or solder connections, place one hand underneath the Control Board to support it, and slide it completely out of the chassis.
- Place the Control Board in the antistatic bag or on the antistatic mat.
Figure 1: Removing a Control Board from a QFX3008-I Interconnect Device
