• Periodically inspect the site to ensure that the grounding and power cables connected to the switch
are securely in place and that there is no moisture accumulating near the switch.
Maintaining the EX9253 Routing Engine
IN THIS SECTION
Removing a Routing Engine from an EX9253 Switch | 132
Installing a Routing Engine in an EX9253 Switch | 134
Removing a Routing Engine from an EX9253 Switch
Before you begin to remove an RE:
• Ensure you understand how to prevent electrostatic discharge (ESD) damage (see
Prevention of
Electrostatic Discharge Damage
).
Ensure that you have the following parts and tools available:
• An ESD wrist strap
• A replacement RE or a cover panel for the RE slot
The Routing Engine (RE) in an EX9253 switch is a hot-removable and hot-insertable field-replaceable
unit (FRU). You can remove and replace it while the switch is running without turning off power to the
switch or disrupting switching functions if RE graceful switchover is configured in the CLI. The REs are
installed on the front panel. At least one RE must be installed in the switch. To ensure proper operation
of the switch, you must install a replacement RE shortly after removing an RE from the chassis. The REs
are installed in the slots labeled RE0 and RE1 on the front panel of the chassis.
CAUTION: Do not leave the RE slot empty for a long time while the switch is
operational. Either replace the RE promptly or install a cover panel over the empty slot.
To remove an RE from an EX9253 switch (see
):
1. Take the RE offline by issuing one of the following commands:
132