Configuring Junos OS on the EX4650 | 100
EX4650 Switch Default Configuration | 101
Connecting and Configuring an EX4650 Switch | 101
Maintaining Components
Maintaining the EX4650 Cooling System | 109
Removing a Fan Module from an EX4650 Switch | 109
Installing a Fan Module in an EX4650 Switch | 110
Maintaining the EX4650 Power System | 112
Removing a Power Supply from an EX4650 Switch | 112
Installing an AC Power Supply in an EX4650 Switch | 114
Maintaining Transceivers | 115
Removing a Transceiver | 116
Removing a QSFP28 Transceiver | 119
Installing a Transceiver | 121
Installing a QSFP28 Transceiver | 123
Maintaining Fiber-Optic Cables | 125
Connecting a Fiber-Optic Cable | 125
Disconnecting a Fiber-Optic Cable | 126
Maintaining Fiber-Optic Cables | 127
Troubleshooting Hardware
Troubleshooting the EX4650 Components | 131
Understanding Alarms | 131
Interface Alarm Messages | 132
Creating an Emergency Boot Device | 133
Contacting Customer Support and Returning the Chassis or Components
Returning an EX4650 Chassis or Components | 137
Returning an EX4650 Switch or Component for Repair or Replacement | 137
Locating the Serial Number on an EX4650 Switch or Component | 138
Listing the Switch and Components Details using the CLI | 138
Locating the Chassis Serial Number ID Label on an EX4650 Switch | 139
vi