The Control Boards install horizontally into the top rear of the chassis in slots labeled
CB 0 and CB 1.
Figure 25: Control Board in a QFXC08 Chassis
g050155
Control board
status LEDs
Status and
Link/Activity LEDs
SFP
ports
Ejector levers
Management
port
Auxiliary
port
Console
port
USB
port
One Control Board functions as the master, and the other acts as the backup. If the
master Control Board fails or is removed, the backup Control Board takes over as the
master Control Board. When the Control Boards are configured for graceful switchover,
the backup Control Board automatically synchronizes its configuration and state with
those of the master Control Board. Any update to the master Control Board is replicated
on the backup Control Board. If the master Control Board fails, or mastership is switched
to the backup Control Board, packet forwarding stops on the QFXC08 chassis. When
the backup Control Board assumes mastership, packet forwarding continues through
the device.
If you need to replace the master Control Board, we recommend that you switch
mastership to the backup Control Board. We recommend that you always take a Control
Board offline before removing it. See “Taking a Control Board Offline in a QFX3008-I
Interconnect Device” on page 345.
The Control Board provides these functions:
•
Powers the 16-port QSFP+ front cards on and off
•
Powers the rear cards on and off
•
Performs routing functions for the device
•
Controls system resets and the boot sequence for the device
•
Monitors and controls the speed of the fans in the fan trays
•
Monitors and controls the LCD panel and chassis status LEDs
•
Monitors the communication of the 16-port QSFP+ front cards with the rear cards
•
Monitors the status of the power supplies
The Control Board has these components:
Copyright © 2012, Juniper Networks, Inc.50
QFX3000 Hardware Documentation
To Next Page
Loading...
Need help?
General
