Juniper EX4300 Series Hardware Manual page 7

Maintain Transceivers | 309
Remove a Transceiver | 309
Install a Transceiver | 312
Maintain Fiber-Optic Cables | 315
Connect a Fiber-Optic Cable | 315
Disconnect a Fiber-Optic Cable | 316
How to Handle Fiber-Optic Cables | 317
5
Troubleshooting Hardware
Troubleshooting the EX4300 Components | 320
Understand Alarm Types and Severity Levels on EX Series Switches | 320
Chassis Component Alarm Conditions on EX4300 Switches | 322
Check Active Alarms with the J-Web Interface | 325
Monitor System Log Messages | 326
Troubleshooting PoE Voltage Injection Failure in EX2300, EX3400, or EX4300 Switch Models
with PoE Capability | 333
Troubleshoot Temperature Alarms in EX Series Switches | 334
6 Contacting Customer Support and Returning the Chassis or Components
Returning an EX4300 Chassis or Components | 342
Returning an EX4300 Switch or Component for Repair or Replacement | 342
Locating the Serial Number on an EX4300 Switch or Component | 343
Listing the Switch and Components Details with the CLI | 343
Locating the Chassis Serial Number ID Label on an EX4300 Switch | 344
Locating the Serial Number ID Labels on FRUs in an EX4300 Switch | 346
Contact Customer Support to Obtain a Return Material Authorization | 353
Packing an EX4300 Switch or Component for Shipping | 354
Packing an EX4300 Switch for Shipping | 354
Packing EX4300 Switch Components for Shipping | 356
7 Safety and Compliance Information
vii