Dell PowerConnect J-EX4500, Hardware Manual

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NOTE: The network ports are located on the front of the switch.
To provide carrier-class reliability, J-EX4500 switches include:
• Dual redundant, load-sharing power supplies that are field-replaceable, hot-removable,
and hot-insertable.
•
A field-replaceable fan tray with five fans. The switch remains operational if a single
fan fails.
• Redundant Routing Engines in a Virtual Chassis configuration. This redundancy enables
graceful Routing Engine switchover (GRES).
•
Junos OS with its modular design that enables failed system processes to gracefully
restart.
Virtual Chassis Module
J-EX4500 switches ship with the Virtual Chassis module preinstalled horizontally on the
rear of the chassis. The Virtual Chassis module is an offline field-replaceable unit (FRU).
The Virtual Chassis module has two dedicated Virtual Chassis ports (VCPs) that can be
used to interconnect the switch with J-EX4200 switches or another J-EX4500 switch to
form a Virtual Chassis. Only two J-EX4500 switches can be interconnected into a Virtual
Chassis composed exclusively of J-EX4500 switches.
J-EX4200 switches and J-EX4500 switches can be connected together in the same
Virtual Chassis through their dedicated VCPs to form a mixed J-EX4200 and J-EX4500
Virtual Chassis. A mixed Virtual Chassis supports up to two J-EX4500 switches and up
to eight J-EX4200 switches.
You can also interconnect J-EX4500 switches to form a Virtual Chassis through SFP+
uplink module ports or SFP+ network ports configured as VCPs.
CAUTION: Operating a J-EX4500 switch without the Virtual Chassis module
installed is not supported. You cannot start the switch unless the Virtual
Chassis module is installed in the chassis.
Uplink Modules
Optional uplink modules are available for J-EX4500 switches. Two uplink modules can
be installed in a 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.
Power Supplies
J-EX4500 switches support AC power supplies and ship with one power supply installed.
You can install a second AC power supply in your switch. See “AC Power Supply in
J-EX4500 Switches” on page 21.
5
Chapter 1: Dell PowerConnect J-Series J-EX4500 Switch Overview