Juniper EX4500 Hardware Manual page 216

NOTE: The Virtual Chassis module is supported on EX4500 switches in Junos OS Releases 11.1
and later.
CAUTION:
Virtual Chassis module is not supported.
EX4500 switches running Junos OS Release 10.4R2 or later 10.4 releases will not boot
if you do not install the intraconnect module in the switch.
EX4500 switches running Junos OS Release 11.1R1 or later releases will not boot if
you install neither the intraconnect module nor the Virtual Chassis module in the
switch.
Before you begin removing the Virtual Chassis module from the switch:
Ensure that you have taken the necessary precautions to prevent electrostatic discharge (ESD) damage
(see "Prevention of Electrostatic Discharge Damage" on page
Have instructions and tools for removing the fan tray. See
on page 190.
Ensure that you have the following parts and tools available:
ESD grounding strap
Phillips screwdriver, number 2
A replacement Virtual Chassis module. (Install the replacement module immediately after removing the
module. Operating the switch without this module is not supported.)
An antistatic bag or antistatic mat
NOTE: You must remove the fan tray from the switch before removing the Virtual Chassis
module. See "Removing a Fan Tray from an EX4500 Switch" on page
To remove the Virtual Chassis module from the switch (see
1. Halt the switch:
user@switch> request system halt
Wait until a message appears confirming that switch operation has halted.
2. Power off the switch by performing one of the following:
Operating an EX4500 switch without the intraconnect module or the
305).
"Removing a Fan Tray from an EX4500 Switch"
190.
Figure 66 on page 218):
216