EX4300 Switch Hardware Guide - Juniper Networks

1 EX4300 Switch Hardware GuidePublished2022-01-16 Juniper Networks , Innovation WaySunnyvale, California Networks , the Juniper Networks logo, Juniper , and Junos are registered trademarks of Juniper Networks , the United States and other countries. All other trademarks, service marks, registered marks, or registered servicemarks are the property of their respective Networks assumes no responsibility for any inaccuracies in this document. Juniper Networks reserves the rightto change, modify, transfer, or otherwise revise this publication without notice. EX4300 Switch Hardware GuideCopyright 2022 Juniper Networks , Inc. All rights information in this document is current as of the date on the title 2000 NOTICEJ uniper Networks Hardware and software products are Year 2000 compliant.

2 Junos OS has no known time-relatedlimitations through the year 2038. However, the NTP application is known to have some difficulty in the year USER LICENSE AGREEMENTThe Juniper Networks product that is the subject of this technical documentation consists of (or is intended for usewith) Juniper Networks software. Use of such software is subject to the terms and conditions of the End User LicenseAgreement ("EULA") posted at By downloading, installing or using suchsoftware, you agree to the terms and conditions of that of ContentsAbout This Guide | x1 OverviewEX4300 System Overview | 2EX4300 Switches Hardware Overview | 2EX4300 Switch Models | 29 Identifying EX4300 Switch Models | 42EX4300 Switch Hardware and CLI Terminology Mapping | 44 Chassis Physical Specifications for EX4300 Switches | 50 Field-Replaceable Units in EX4300 Switches | 52EX4300 Chassis | 53 LCD Panel in EX4300 Switches | 54 Uplink Modules in EX4300 Switches | 59 Chassis Status LEDs on EX4300 Switches | 69 Management Port LEDs on EX4300 Switches | 72 network Port, Built-In QSFP+ Port, Uplink Port.

3 And Uplink Module Port LEDs on EX4300 Switches | 74 Cooling System and Airflow in an EX4300 Switch | 82EX4300 Power System | 90AC Power Supply in EX4300 Switches | 91AC Power Supply Specifications for EX4300 Switches | 103AC Power Cord Specifications for an EX4300 Switch | 105AC Power Supply LEDs in EX4300 Switches | 111DC Power Supply in EX4300 Switches | 112DC Power Supply Specifications for EX4300 Switches | 118iiiDC Power Supply LEDs in EX4300 Switches | 1192 Site Planning, Preparation, and SpecificationsSite Preparation Checklist for EX4300 Switches | 122EX4300 Site Guidelines and Requirements | 124 Environmental Requirements and Specifications for EX Series Switches | 124 General Site Guidelines | 131 Site Electrical Wiring Guidelines | 131 Rack Requirements | 132 Cabinet Requirements | 134 Clearance Requirements for Airflow and Hardware Maintenance for EX4300 Switches | 135EX4300 network Cable and Transceiver Planning | 140 Pluggable Transceivers Supported on EX4300 Switches | 141 SFP+ Direct Attach Copper Cables for EX Series Switches | 142 QSFP+ Direct Attach Copper Cables for EX Series Switches

4 | 144 Understanding EX Series Switches Fiber-Optic Cable Signal Loss, Attenuation, and Dispersion | 146 Calculating the Fiber-Optic Cable Power Budget for EX Series Devices | 147 Calculating the Fiber-Optic Cable Power Margin for EX Series Devices | 148EX4300 Management Cable Specifications and Pinouts | 150 Management Cable Specifications | 150 Console Port Connector Pinout Information | 151 Mini-USB Port Pinout Specifications | 152 USB Port Specifications for an EX Series Switch | 153RJ-45 Management Port Connector Pinout Information | 153EX4300 RJ-45 Port, SFP Port, SFP+ Port, QSFP+ Port, and QSFP28 Port Connector PinoutInformation | 154RJ-45 to DB-9 Serial Port Adapter Pinout Information | 1623 Initial Installation and ConfigurationivUnpacking and Mounting the EX4300 Switch | 165 Unpacking an EX4300 Switch | 165 Parts Inventory (Packing List)

5 For an EX4300 Switch | 166 Register Products Mandatory to Validate SLAs | 168 Installing and Connecting an EX4300 Switch | 169 Mounting an EX4300 Switch | 170 Mounting an EX4300 Switch on Two Posts of a Rack or Cabinet | 171 Mounting an EX4300 Switch on Four Posts of a Rack or Cabinet | 175 Mounting an EX4300 Switch in a Recessed Position in a Rack or Cabinet | 178 Mounting an EX4300 Switch on a Wall | 179 Connecting the EX4300 to Power | 184 Connect Earth Ground to an EX Series Switch | 185 Connecting AC Power to an EX4300 Switch | 193 Connecting DC Power to an EX4300 Switch | 196 Connecting the EX4300 to External Devices | 201 Connect a Device to a network for Out-of-Band Management | 201 Connect a Device to a Management Console Using an RJ-45 Connector | 202 Connect an EX Series Switch to a Management Console Using the Mini-USB Type-B ConsolePort | 203 Connecting the EX4300 to the network | 205 Install a Transceiver | 205 Connect a Fiber-Optic Cable | 208 Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis | 209 Connecting QFX Series and EX Series Switches in a QFX Virtual Chassis | 210 Before You Start | 210 Valid Configurations | 211 Cabling QFX3500 Switches in a QFX5100 Virtual Chassis | 213 Cabling

6 QFX3600 Switches in a QFX Virtual Chassis | 215vCabling a Mixed QFX Virtual Chassis | 215 Configuring Junos OS on the EX4300 | 219EX4300 Default Configuration | 219 Connecting and Configuring an EX Series Switch (CLI Procedure) | 237 Connecting and Configuring an EX Series Switch (J-Web Procedure) | 241 Configuring the LCD Panel on EX Series Switches (CLI Procedure) | 244 Disabling or Enabling Menus and Menu Options on the LCD Panel | 245 Configuring a Custom Display Message | 246 Reverting to the Default Factory Configuration for the EX Series Switch | 247 Reverting to the EX Series Switch Factory-Default Configuration Using the request systemzeroize Command | 248 Reverting to the EX Series Switch Factory-Default Configuration Using the load factory-default Command | 249 Reverting to the Factory-Default Configuration Using the EX Series Switch LCD Panel | 250 Reverting to the Factory-Default Configuration Using the Factory Reset/Mode button onEX2300, ex3400 .

7 And EX4300 -48MP Switches | 251 Dashboard for EX Series Switches | 2524 Maintaining ComponentsMaintaining the EX4300 Cooling System | 285 Removing a Fan Module from an EX4300 Switch | 285 Installing a Fan Module in an EX4300 Switch | 286 Maintaining the EX4300 Power System | 288 Removing an AC Power Supply from an EX4300 Switch | 289 Installing an AC Power Supply in an EX4300 Switch | 291 Removing a DC Power Supply from an EX4300 Switch | 292 Installing a DC Power Supply in an EX4300 Switch | 294 Maintaining an Uplink Module in an EX4300 Switch | 296 Removing an Uplink Module from an EX4300 Switch | 297 Installing an Uplink Module in an EX4300 Switch | 299viMaintain Transceivers | 302 Remove a Transceiver | 302 Remove a QSFP28 Transceiver | 305 Install a Transceiver | 306 Install a QSFP28 Transceiver | 309 Maintain Fiber-Optic Cables | 311 Connect a Fiber-Optic Cable | 311 Disconnect a Fiber-Optic Cable | 312 How to Handle Fiber-Optic Cables | 3135 Troubleshooting HardwareTroubleshooting the EX4300 Components | 316 Understand Alarm Types and Severity Levels on EX Series Switches | 316 Chassis Component Alarm Conditions on EX4300 Switches | 318 Check Active Alarms with the J-Web Interface | 321 Monitor System Log Messages |

8 322 Troubleshooting PoE Voltage Injection Failure in EX2300, ex3400 , or EX4300 Switch Modelswith PoE Capability | 329 Troubleshoot Temperature Alarms in EX Series Switches | 3306 Contacting Customer Support and Returning the Chassis or ComponentsReturning an EX4300 Chassis or Components | 338 Returning an EX4300 Switch or Component for Repair or Replacement | 338 Locating the Serial Number on an EX4300 Switch or Component | 339 Listing the Switch and Components Details with the CLI | 339 Locating the Chassis Serial Number ID Label on an EX4300 Switch | 340 Locating the Serial Number ID Labels on FRUs in an EX4300 Switch | 342 Contact Customer Support to Obtain Return Material Authorization |

9 349 Packing an EX4300 Switch or Component for Shipping | 350 Packing an EX4300 Switch for Shipping | 350viiPacking EX4300 Switch Components for Shipping | 3527 Safety and Compliance InformationGeneral Safety Guidelines and Warnings | 355 Definitions of Safety Warning Levels | 356 Qualified Personnel Warning | 358 Warning Statement for Norway and Sweden | 358 Fire Safety Requirements | 359 Installation Instructions Warning | 360 Chassis and Component Lifting Guidelines | 361 Restricted Access Warning | 361 Ramp Warning | 363 Rack-Mounting and Cabinet-Mounting Warnings | 363 Wall-Mounting Warning for EX4300 Switches | 367 Grounded Equipment Warning | 368 Radiation from Open Port Apertures Warning | 368 Laser and LED Safety Guidelines and Warnings | 369 Maintenance and Operational Safety Guidelines and Warnings | 372 General Electrical Safety Guidelines and Warnings | 378 Action to Take After an Electrical Accident | 380 Prevention of Electrostatic Discharge Damage | 380AC Power Electrical Safety Guidelines | 382AC Power Disconnection Warning | 383DC Power Electrical Safety Guidelines | 384DC Power Disconnection Warning | 385DC Power Grounding Requirements and Warning | 386viiiDC Power Wiring Sequence Warning | 387DC Power

10 Wiring Terminations Warning | 389 Multiple Power Supplies Disconnection Warning | 390TN Power Warning | 391 Agency Approvals for EX Series Switches | 392 Compliance Statements for EM