Chapter 3
Cooling System and Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Cooling System and Airflow in an EX4300 Switch . . . . . . . . . . . . . . . . . . . . . . . . . 41
Fan Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Airflow Direction in EX4300 Switch Models . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Front-to-Back Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Back-to-Front Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Do Not Mix AIR IN (AFI) and AIR OUT (AFO) Components in the Switch . . . 45
Positioning the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Fan Module Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Chapter 4
Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
AC Power Supply in EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Characteristics of an AC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
AC Power Supply Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
N+0 Redundancy Configuration of AC Power Supplies . . . . . . . . . . . . . . . . . 50
N+N Redundancy Configuration of AC Power Supplies . . . . . . . . . . . . . . . . . . 51
AC Power Supply LEDs in EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
DC Power Supply in EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Characteristics of a DC Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
DC Power Supply Airflow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
N+0 Redundancy Configuration of DC Power Supplies . . . . . . . . . . . . . . . . . 57
N+N Redundancy Configuration of DC Power Supplies . . . . . . . . . . . . . . . . . 58
DC Power Supply LEDs in EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Chapter 5
Viewing System Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Dashboard for EX Series Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Graphical Chassis Viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
System Information Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Health Status Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Capacity Utilization Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Alarms Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
File System Usage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Chassis Viewer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Part 2
Site Planning, Preparation, and Specifications
Chapter 6
Preparation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Site Preparation Checklist for EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Environmental Requirements and Specifications for EX Series Switches . . . . . . 84
General Site Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88
Site Electrical Wiring Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89
Rack Requirements for EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Cabinet Requirements for EX4300 Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92
Clearance Requirements for Airflow and Hardware Maintenance for EX4300
Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Chapter 7
Power Specifications and Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
AC Power Supply Specifications for EX4300 Switches . . . . . . . . . . . . . . . . . . . . . 97
AC Power Cord Specifications for an EX4300 Switch . . . . . . . . . . . . . . . . . . . . . . 98
Copyright © 2015, Juniper Networks, Inc.
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EX4300 Switch Hardware Guide
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