Uplink Modules; Power Supplies - Juniper EX4500 Hardware Manual

You can use the following ports to configure an EX4500 switch in a Virtual Chassis composed exclusively
of EX4500 switches or in a mixed Virtual Chassis:
Dedicated VCPs on the Virtual Chassis module installed in the switch
SFP+ uplink module ports configured as VCPs
SFP+ fixed network ports configured as VCPs
For information about understanding and configuring Virtual Chassis, see Virtual Chassis User Guide for
EX2200, EX3300, EX4200, EX4500 and EX4550 Switches.

Uplink Modules

Optional uplink modules are available for EX4500 switches. You can install up to two uplink modules in
an EX4500 switch. Each uplink module provides four SFP+ ports for connecting to core devices in a data
center. You can install SFP or SFP+ transceivers in these ports. You can also configure the uplink module
ports as VCPs to form a Virtual Chassis. For more information, see
on page 48.

Power Supplies

EX4500 switches support both AC and DC power supplies. Each AC power supply is available in two
different airflow models, front-to-back and back-to-front. DC power supplies are available only in the
front-to-back airflow model.
EX4500 switches ship with one AC or DC power supply installed. You can install a second AC or DC power
supply in your EX4500 switch. See
Supply in EX4500 Switches" on page
CAUTION:
with front-to-back and back-to-front airflow in the same chassis is not supported.
SEE ALSO
Understanding EX Series Virtual Chassis
"AC Power Supply in EX4500 Switches" on page 58
66.
Mixing different types (AC and DC) of power supplies or power supplies
"Uplink Modules in EX4500 Switches"
and
24
"DC Power