
Chapter6 QFX3500Overview...............................................115
QFX3500DeviceOverview...........................................115
Software......................................................116
Hardware .....................................................116
SFP+AccessPorts...........................................117
QSFP+UplinkPorts.........................................118
Field-Replaceable Units in a QFX3500 Device . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Understanding Redundancy of QFX3500 Device Components and
Functionality ..................................................120
Chassis Physical Specifications for a QFX3500 Chassis . . . . . . . . . . . . . . . . . . . . 121
FrontPanelofaQFX3500Device.....................................122
RearPanelofaQFX3500Device......................................123
Cooling System and Airflow for a QFX3500 Device . . . . . . . . . . . . . . . . . . . . . . . 124
Management Board for a QFX3500 Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
AC Power Supply for a QFX3500, QFX3600, or QFX3600-I Device . . . . . . . . . . 130
DC Power Supply for a QFX3500, QFX3600, or QFX3600-I Device . . . . . . . . . . 132
Grounding Cable and Lug Specifications for a QFX3500 Device . . . . . . . . . . . . . 134
Chapter7 EX4300Overview................................................137
EX4300 Switches Hardware Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
Software .....................................................138
EX4300SwitchesFirstView......................................138
24-PortEX4300Switches....................................138
32-PortEX4300Switches....................................140
48-PortEX4300Switches....................................141
UplinkModules................................................145
VirtualChassis.................................................147
PowerSupplies................................................148
Fan Modules ..................................................149
EX4300SwitchComponents.....................................150
Field-Replaceable Units in EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Chassis Physical Specifications for EX4300 Switches . . . . . . . . . . . . . . . . . . . . . 155
Cooling System and Airflow in an EX4300 Switch . . . . . . . . . . . . . . . . . . . . . . . . 156
Fan Modules ..................................................156
Airflow Direction in EX4300 Switch Models . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Front-to-BackAirflow...........................................158
Back-to-FrontAirflow...........................................160
Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch . . . 161
PositioningtheSwitch...........................................161
FanModuleStatus..............................................161
ACPowerSupplyinEX4300Switches.................................162
Characteristics of an AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163
ACPowerSupplyAirflow.........................................165
N+0 Redundancy Configuration of AC Power Supplies . . . . . . . . . . . . . . . . . 165
N+N Redundancy Configuration of AC Power Supplies . . . . . . . . . . . . . . . . 168
DCPowerSupplyinEX4300Switches.................................170
Characteristics of a DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 171
DCPowerSupplyAirflow.........................................172
N+0 Redundancy Configuration of DC Power Supplies . . . . . . . . . . . . . . . . . 173
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QFX3000-G QFabric System Hardware Documentation