Juniper EX4300 Series

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Figure 40: Front-to-Back Airow Through 32-Port EX4300 Switch Chassis

You must install only power supplies that have AIR OUT (AFO) labels in switches in which the fan

modules have AIR OUT (AFO) labels.

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Table of Contents3
About this Guide10
Overview11
EX4300 System Overview12
EX4300 Switches Hardware Overview12
EX4300 Switch Models39
Identifying EX4300 Switch Models52
EX4300 Switch Hardware and CLI Terminology Mapping54
Chassis Physical Specifications for EX4300 Switches60
Field-Replaceable Units in EX4300 Switches62
EX4300 Chassis63
LCD Panel in EX4300 Switches64
Uplink Modules in EX4300 Switches69
Chassis Status Leds on EX4300 Switches79
Management Port Leds on EX4300 Switches82
Network Port, Built-In QSFP+ Port, Uplink Port, and Uplink Module Port Leds on EX4300 Switches84
Cooling System and Airflow in an EX4300 Switch92
Fan Modules93
Airflow Direction in EX4300 Switch Models94
Front-To-Back Airflow96
Back-To-Front Airflow98
Do Not MIX AIR in (AFI) and AIR out (AFO) Components in the Switch98
Positioning the Switch99
Fan Module Status99
EX4300 Power System100
AC Power Supply in EX4300 Switches101
AC Power Supply Specifications for EX4300 Switches113
AC Power Cord Specifications for an EX4300 Switch115
AC Power Supply Leds in EX4300 Switches121
DC Power Supply in EX4300 Switches122
DC Power Supply Specifications for EX4300 Switches128
DC Power Supply Leds in EX4300 Switches129
Site Planning, Preparation, and Specifications131
Site Preparation Checklist for EX4300 Switches132
EX4300 Site Guidelines and Requirements134
Environmental Requirements and Specifications for EX Series Switches134
General Site Guidelines141
Site Electrical Wiring Guidelines141
Rack Requirements142
Cabinet Requirements144
Clearance Requirements for Airflow and Hardware Maintenance for EX4300 Switches145
EX4300 Network Cable and Transceiver Planning150
Pluggable Transceivers Supported on EX4300 Switches151
SFP+ Direct Attach Copper Cables for EX Series Switches152
QSFP+ Direct Attach Copper Cables for EX Series Switches154
Overview of EX Series Switches: Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion156
Calculate the Fiber-Optic Cable Power Budget for EX Series Devices158
Calculating the Fiber-Optic Cable Power Margin for EX Series Devices159
EX4300 Management Cable Specifications and Pinouts161
Management Cable Specifications161
Console Port Connector Pinout Information162
Mini-USB Port Pinout Specifications163
USB Port Specifications for an EX Series Switch164
RJ-45 Management Port Connector Pinout Information164
Table164
EX4300 RJ-45 Port, SFP Port, SFP+ Port, QSFP+ Port, and QSFP28 Port Connector Pinout Information165
To DB-9 Serial Port Adapter Pinout Information173
Initial Installation and Configuration175
Unpacking and Mounting the EX4300 Switch176
Unpacking an EX4300 Switch176
Parts Inventory (Packing List) for an EX4300 Switch177
Register Products-Mandatory to Validate Slas179
Installing and Connecting an EX4300 Switch180
Mounting an EX4300 Switch181
Mounting an EX4300 Switch on Two Posts of a Rack or Cabinet182
Mounting an EX4300 Switch on Four Posts of a Rack or Cabinet186
Mounting an EX4300 Switch in a Recessed Position in a Rack or Cabinet189
Mounting an EX4300 Switch on a Wall190
Connecting the EX4300 to Power195
Connect Earth Ground to an EX Series Switch196
Connecting AC Power to an EX4300 Switch206
Connecting DC Power to an EX4300 Switch209
Connecting the EX4300 to External Devices215
Connect a Device to a Network for Out-Of-Band Management215
Connect a Device to a Management Console Using an RJ-45 Connector216
Connect an EX Series Switch to a Management Console Using the Mini-USB Type-B Console Port217
Connecting the EX4300 to the Network219
Install a Transceiver219
Connect a Fiber-Optic Cable222
Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis223
Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis224
Before You Start224
Valid Configurations225
Cabling QFX3500 Switches in a QFX5100 Virtual Chassis227
Cabling QFX3600 Switches in a QFX Virtual Chassis229
Cabling a Mixed QFX Virtual Chassis229
Configuring Junos os on the EX4300233
EX4300 Default Configuration233
Connecting and Configuring an EX Series Switch (CLI Procedure)251
Connecting and Configuring an EX Series Switch (J-Web Procedure)255
Configuring the LCD Panel on EX Series Switches (CLI Procedure)258
Disabling or Enabling Menus and Menu Options on the LCD Panel259
Configuring a Custom Display Message260
Reverting to the Default Factory Configuration for the EX Series Switch261
Reverting to the EX Series Switch Factory-Default Configuration Using the Request System Zeroize Command262
Reverting to the EX Series Switch Factory-Default Configuration Using the Load Factory-Default Command263
Reverting to the Factory-Default Configuration Using the EX Series Switch LCD Panel264
Reverting to the Factory-Default Configuration Using the Factory Reset/Mode Button on EX2300, EX3400, and EX4300-48MP Switches265
Dashboard for EX Series Switches266
Maintaining Components301
Maintaining the EX4300 Cooling System302
Removing a Fan Module from an EX4300 Switch302
Installing a Fan Module in an EX4300 Switch303
Maintaining the EX4300 Power System305
Removing an AC Power Supply from an EX4300 Switch306
Installing an AC Power Supply in an EX4300 Switch308
Removing a DC Power Supply from an EX4300 Switch309
Installing a DC Power Supply in an EX4300 Switch311
Maintaining an Uplink Module in an EX4300 Switch313
Removing an Uplink Module from an EX4300 Switch314
Installing an Uplink Module in an EX4300 Switch316
Maintain Transceivers319
Remove a Transceiver319
Install a Transceiver322
Maintain Fiber-Optic Cables325
Connect a Fiber-Optic Cable325
Disconnect a Fiber-Optic Cable326
How to Handle Fiber-Optic Cables327
Troubleshooting Hardware329
Troubleshooting the EX4300 Components330
Understand Alarm Types and Severity Levels on EX Series Switches330
Chassis Component Alarm Conditions on EX4300 Switches332
Check Active Alarms with the J-Web Interface335
Monitor System Log Messages336
Troubleshooting Poe Voltage Injection Failure in EX2300, EX3400, or EX4300 Switch Models with Poe Capability343
Troubleshoot Temperature Alarms in EX Series Switches344
Contacting Customer Support and Returning the Chassis or Components351
Returning an EX4300 Chassis or Components352
Returning an EX4300 Switch or Component for Repair or Replacement352
Locating the Serial Number on an EX4300 Switch or Component353
Listing the Switch and Components Details with the CLI353
Locating the Chassis Serial Number ID Label on an EX4300 Switch354
Locating the Serial Number ID Labels on Frus in an EX4300 Switch356
Contact Customer Support to Obtain a Return Material Authorization363
Packing an EX4300 Switch or Component for Shipping364
Packing an EX4300 Switch for Shipping364
Packing EX4300 Switch Components for Shipping366
Safety and Compliance Information367
General Safety Guidelines and Warnings369
Definitions of Safety Warning Levels370
Qualified Personnel Warning372
Warning Statement for Norway and Sweden372
Fire Safety Requirements373
Installation Instructions Warning374
Chassis and Component Lifting Guidelines375
Restricted Access Warning375
Ramp Warning377
Rack-Mounting and Cabinet-Mounting Warnings377
Wall-Mounting Warning for EX4300 Switches381
Grounded Equipment Warning382
Radiation from Open Port Apertures Warning382
Laser and LED Safety Guidelines and Warnings383
Maintenance and Operational Safety Guidelines and Warnings386
General Electrical Safety Guidelines and Warnings392
Action to Take after an Electrical Accident394
Prevention of Electrostatic Discharge Damage394
AC Power Electrical Safety Guidelines396
AC Power Disconnection Warning397
DC Power Electrical Safety Guidelines for EX4300 Switches398
DC Power Disconnection Warning399
DC Power Grounding Requirements and Warning400
DC Power Wiring Sequence Warning401
DC Power Wiring Terminations Warning403
Multiple Power Supplies Disconnection Warning404
Agency Approvals for EX Series Switches406
Compliance Statements for EMC Requirements for EX Series Switches407
Compliance Statements for Acoustic Noise for EX Series Switches411
Statements of Volatility for Juniper Network Devices411

Juniper EX4300 Series

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