2

EX4200 Ethernet Switch

Each EX4200 switch includes an integrated application-specific

integrated circuit (ASIC)-based Packet Forwarding Engine, the

EX-PFE, while an integrated Routing Engine (RE) delivers all

control plane functionality. Based on field-proven Juniper

Networks technology, the Route Engine brings the same level

of carrier-class performance and reliability to the EX4200 line

of Ethernet switches that Juniper Networks routers bring to the

world’s largest service provider networks.

The EX4200 also leverages the same modular Juniper Networks

Junos OS as Juniper Networks switching, routing, and security

products, ensuring a consistent implementation and operation

of each control plane feature across an entire Juniper Networks

infrastructure.

Architecture and Key Components

The EX4200 switches are single rack-unit devices that deliver

a compact solution for crowded wiring closets and access

switch locations where space and power are at a premium. Each

EX4200 supports optional front-panel uplink modules offering

either four GbE ports or two 10GbE ports for high-speed

backbone or link-aggregation connections between wiring

closets and upstream aggregation switches. Uplink modules can

be installed without powering down the switch, enabling users

to add high-speed connectivity at any time or migrate from one

uplink type to the other to deliver the ultimate in flexible, high-

performance interconnectivity.

The EX4200 also features a front-panel LCD that offers a flexible

interface for performing device bring-up and configuration

rollbacks, reporting switch alarm and LED status, or restoring

the switch to its default settings. The LCD also displays a Virtual

Chassis member switch’s chassis “slot number” and Route Engine

status for rapid identification and problem resolution.

Dual rear-panel Virtual Chassis ports enable EX4200 switches

to be interconnected over the 128 Gbps virtual backplane.

Switches deployed in close proximity, such as wiring closets

or top-of-rack data center applications, can be securely

connected using a Virtual Chassis cable and cable lock

supplied by Juniper Networks.

In addition, a dedicated rear-panel RJ-45 port is available for

out-of-band management, while a rear-panel USB port can be

used to easily upload Junos OS and configuration files.

Virtual Chassis Technology: Chassis-Like

Switch Features in a Stackable Form Factor

Up to 10 EX4200 switches can be interconnected using Virtual

Chassis technology to create a single logical device supporting

up to 480 10/100/1000BASE-T ports or 240 100/1000BASE-X

ports, plus an additional 40 GbE or 20 10GbE uplink ports.

Furthermore, EX4200s can be interconnected in a Virtual

Chassis configuration that also includes EX4500s, creating a

single logical switch that offers a variety of port and density

options for mixed server environments.

Floor N

WAN Edge

EX4200

Virtual Chassis

West Closet

West Closet

West Closet

West Closet

Wiring Closet

EX4200 Virtual Chassis

Floor 1

Aggregation

EX4200 Virtual Chassis

EX4200 Virtual Chassis

SRX Series

M Series

Data Center

Access Layer

EX4200 and EX4500 Virtual Chassis

Core Layer

EX8208

Virtual Chassis

SRX5800

Extend Virtual Private LANs

with MPLS

High Density.

wire-rate 10 Gbps

Virtualized

security

WAN/Internet

Figure 1: The EX4200 Ethernet switch with Virtual Chassis technology delivers a

high-performance, scalable, and highly reliable solution for data center, branch, and

campus environments.