Juniper Networks EX4200 - Manual (Page 31)

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 Software with its modular design that enables failed system processes to
gracefully restart.
Uplink Modules
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.
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 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.
Related Topics ■ EX3200 Switch Models on page 6
■ EX4200 Switch Models on page 6
■ Field-Replaceable Units in EX3200 and EX4200 Switches on page 16
■ Site Preparation Checklist for EX3200 and EX4200 Switches on page 81
EX3200 and EX4200 Switches Hardware Overview ■ 5
Chapter 1: EX3200 and EX4200 Switches Overview