Juniper EX4500 Hardware Manual page 45

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.
Figure 9 on page 45 shows the Virtual Chassis module.
Figure 9: Virtual Chassis Module
The Virtual Chassis module has two LEDs (labeled ST and VC MODE ) on the left side of its faceplate that
indicate the status and the operating mode of the Virtual Chassis module. See
Figure 10: Virtual Chassis Module LEDs
Status Virtual chassis
LED mode LED
Table 7 on page 46 describes the LEDs on the Virtual Chassis module in an EX4500 switch.
Operating an EX4500 switch without the intraconnect module or the
Figure 10 on page 45.
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