Juniper QFX10016, Hardware Manual

Page: 34 / 439

either of its components) fails, the backup can take over as the primary. See
QFX10000 Routing and
Control Board Description
.
• Switch Interface Boards (SIBs)—The QFX10000 has six SIB slots. Five SIBs are required for base
operation and the sixth SIB provides
n+1 redundancy. All six SIBs are active and can sustain full
throughput rate. The fabric plane can tolerate one SIB failure without any loss of performance. See
the
QFX10008 Switch Interface Board Description
and "QFX10016 Switch Interface Board
Description" on page 81 .
• Power supplies—The QFX10000 requires three power supplies for minimum operation (two RCBs,
two fan trays, six SIBs and no line cards). With additional power supplies, it provides
n+1 redundancy
for the system. AC, DC, HVAC, and HVDC systems tolerate a single power supply to fail without
system interruption. If one power supply fails in a fully redundant system, the other power supplies
can provide full power to the QFX10000 indefinitely.
The QFX10000 also supports source redundancy. Two sets of lugs are provided for the QFX10000-
PWR-AC cables, four sets of lugs are provided for the JNP10K-PWR-DC2 cables, and two AC power
cords are provided for each JNP10K-PWR-AC2 power supply.
• Cooling system—The fan trays have redundant fans, which are controlled by the fan tray controller. If
one of the fans fails, the host subsystem increases the speed of the remaining fans to provide
sufficient cooling for the switch indefinitely. See
QFX10008 Cooling System and Airflow
and
"QFX10016 Cooling System and Airflow " on page 33 .
RELATED DOCUMENTATION
QFX10016 Cooling System | 33
QFX10000 Chassis | 24
QFX10000 Routing and Control Board Description | 86
QFX10000-PWR-AC Power Supply | 46
QFX10000-PWR-DC Power Supply | 69
QFX10016 Switch Interface Board Description | 81
23