Technical Documentation

EX 3200 and EX 4200 Switch Hardware Overview

EX-series switches provide scalable connectivity for the enterprise market, including branch offices, campus locations, and data centers. The switches run under the JUNOS software, which provides Layer 2 and Layer 3 switching, routing, and security services. The same JUNOS code base that runs on EX-series switches also runs on all Juniper Networks J-series, M-series, MX-series, and T-series routing platforms.

EX 3200 and EX 4200 Switch Types

EX 3200 and EX 4200 switches are two closely related product lines:

  • EX 3200 switches—Typically, you deploy these switches in branch environments or wiring closets.
  • EX 4200 switches—You can interconnect EX 4200 switches to form a virtual chassis that operates as a single network entity. You can deploy these switches wherever you need a high density of Gigabit Ethernet ports (24 to 480 ports), redundancy, or the ability to span a single switch across several wiring closets. Typically, EX 4200 switches are used in large branch offices, campus wiring closets, and top-of-rack locations in a data center.

Both lines have these features:

  • Run under JUNOS software for EX-series switches
  • Have options of 24-port and 48-port models
  • Have options of full (all ports) or partial (8 ports) Power over Ethernet (PoE) capability
  • Have optional uplink modules that provide connection to distribution switches

EX 3200 Switches

EX 3200 switches provide connectivity for low-density environments. Typically, you deploy these switches in branch environments or wiring closets where only one switch is required.

EX 3200 switches are available in models with either 24 or 48 ports and with either all ports equipped for Power over Ethernet (PoE) or only 8 ports equipped for PoE. All ports have 10/100/1000Base-T Gigabit Ethernet connectors.

EX 3200 switches include:

  • A field-replaceable power supply and an optional additional connection to an external power source.
  • A field-replaceable fan tray with single fan.
  • JUNOS software with its modular design that enables failed system processes to gracefully restart.

EX 4200 Switches

EX 4200 switches provide connectivity for medium- and high-density environments and scalability for growing networks. These switches can be deployed wherever you need a high density of Gigabit Ethernet ports (24 to 480 ports) or redundancy. Typically, EX 4200 switches are used in large branch offices, campus wiring closets, and data centers where they can be positioned as the top device in a rack to provide connectivity for all the devices in the rack.

You can connect individual EX 4200 switches together to form one unit and manage the unit as a single chassis, called a virtual chassis. You can add more member switches to the virtual chassis as needed, up to a total of 10 members.

EX 4200 switches are available in models with 24 or 48 ports and with either all ports equipped for Power over Ethernet (PoE) or only 8 ports equipped for PoE. All models provide ports that have 10/100/1000Base-T Gigabit Ethernet connectors and optional small form-factor pluggable (SFP) transceivers or 10-gigabit small form-factor pluggable (XFP) transceivers for use with fiber connections.

Additionally, a 24-port model provides 100Base-FX/1000Base-X SFP transceivers. This model is typically used as a small distribution switch.

All EX 4200 switches have dedicated 64-Gbps virtual chassis ports that allow you to connect the switches to each other. You can also use optional 10-Gbps uplink ports to connect members of a virtual chassis across multiple wiring closets.

To provide carrier-class reliability, EX 4200 switches include:

  • Dual redundant power supplies that are field-replaceable and hot-swappable. An optional additional connection to an external power source is also available.
  • A field-replaceable fan tray with three fans. The switch remains operational if a single fan fails.
  • Redundant Routing Engines in a virtual chassis configuration. This redundancy enables GRES (Graceful Routing Engine Switchover) and nonstop active routing.
  • JUNOS software with its modular design that enables failed system processes to gracefully restart.

Uplink Modules

Optional uplink modules are available for all EX 3200 and EX 4200 models. Uplink modules provide either two 10-gigabit small form-factor pluggable (XFP) transceivers or four 1-gigabit small form-factor pluggable (SFP) transceivers. You can use SFP or XFP ports to connect an access switch to a distribution switch or to interconnect member switches of a virtual chassis across multiple wiring closets.

Note: If you insert a transceiver in an SFP uplink module installed in an EX 3200 switch, a corresponding network port from the last four ports is disabled. For example, if you insert an SFP transceiver in ge-0/1/3, ge-0/0/23 is disabled. The disabled port is not listed in the output of show interface commands.

Power over Ethernet (PoE) Ports

PoE ports provide electrical current to devices through the network cables so that separate power cords for devices such as IP phones, wireless access points, and security cameras are unnecessary. Both the EX 3200 and EX 4200 switch lines have options of full (all 24 or 48 ports) or partial (8 ports) PoE capability.

Full PoE models are primarily used in IP telephony environments. Partial PoE models are used in environments where, for example, only a few ports for wireless access points or security cameras are required.