Juniper JUNOS OS 10.3 - SOFTWARE Manual page 124

Complete Software Guide for Junos
Uplink Modules
Power over Ethernet (PoE) Ports
Related
Documentation
28
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OS for EX Series Ethernet Switches, Release 10.3
EX4200 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
1-gigabit small form-factor pluggable (SFP) transceivers, 10-gigabit 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 ports. This model
is typically used as a small distribution switch.
All EX4200 switches have dedicated 64-Gbps Virtual Chassis ports that allow you to
connect the switches to each other. You can also use optional uplink module ports to
connect members of a Virtual Chassis across multiple wiring closets.
To provide carrier-class reliability, EX4200 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 OS with its modular design that enables failed system processes to gracefully
restart.
Optional uplink modules are available for all EX3200 and EX4200 switches. Uplink
modules provide two 10-gigabit small form-factor pluggable (XFP) transceivers, four
1-gigabit small form-factor pluggable (SFP) transceivers, or two 10-gigabit small
form-factor pluggable (SFP+) transceivers. You can use XFP, SFP, or SFP+ ports to
connect an access switch to a distribution switch or to interconnect member switches
of a Virtual Chassis across multiple wiring closets.
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 EX3200 and EX4200 switches 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.
EX3200 Switch Models on page 29
EX4200 Switch Models on page 29
Field-Replaceable Units in EX3200 and EX4200 Switches
Site Preparation Checklist for EX3200 and EX4200 Switches
Copyright © 2010, Juniper Networks, Inc.