Datasheet

6
Power
The EX8208 chassis contains six power supply bays and supports
three types of power supplies, providing complete flexibility for
both provisioning and redundancy. Each AC power supply delivers
2000wattsofpowerathigh-line(12Aat200-240V)or1200
Watlow-line(15Aat100-120V)tothechassis.TheEX8208
also supports a 3000 W power supply for high-line operation.
A redundant-input 2000 W DC power supply is also available
for central office deployments. The EX8200 power supplies
are more than 90 percent efficient at a wide range of loads,
minimizing building power requirements and reducing overall power
consumption. These power supplies are interchangeable across the
EX8200 line, simplifying maintenance and sparing.
Although only two power supplies are required for basic
configuration and switch power-up, the six power supply bays
provide the capacity required to power all possible line-card
configurations, and to support N+1 or N+N power redundancy to
protect against both component and line input failures. The actual
number of power supplies required depends on the combination
of line cards installed and the desired level of redundancy (see
Table 2). For example, 6000 W is required to support a chassis
fully populated with 64 10-Gigabit Ethernet ports, while 3600 W
will support various 10-Gigabit Ethernet and Gigabit Ethernet line-
card combinations.
Table 2: EX8208 Power Capacity
MAXIMUM SYSTEM POWER CONSUMPTION NORMAL
FAN
HIGH
FAN
Basesystem(oneSRE;oneSwitchFabric
module;onefantray)
550 W 1350 W
Redundantsystem(twoSREs;oneSwitch
Fabricmodule;onefantray)
750W 1550 W
MAXIMUM LINE CARD POWER CONSUMPTION
EX8200-8XS 8-port 10GbE SFP+ line card 450 W
EX8200-48T 48-port 10/100/1000BASE-T
RJ-45 line card
350 W
EX8200-48F 48-port 100FX/1000BASE-X SFP
line card
330 W
MAXIMUM POWER CAPACITY
220V5+1powersupplyredundancy 10,000 W
220V3+3powersupplyredundancy 6000 W
110V5+1powersupplyredundancy 6000 W
110V3+3powersupplyredundancy 3600 W
Features and Benefits
High Availability
The EX8208 switch delivers a number of high availability features
to ensure uninterrupted, carrier-class performance.
The EX8208 switch features an extra slot to accommodate a
second SRE module, providing N+1 redundancy. When a second
SRE module is present, the integrated Routing Engine serves as a
backup in hot standby mode, ready to take over in the event of a
master RE failure. Should the master fail, an integrated Layer 2 and
Layer 3 Graceful Route Engine Switchover (GRES) feature seamlessly
transfers control to the backup, maintaining uninterrupted access to
applications, services, and IP communications.
Carrier-Class Operating System
The EX8208 chassis-based switch runs the same Junos OS used
by the EX3200 and EX4200 switches, as well as the Juniper
Networks routers used to power the world’s largest and most
complex networks.
By utilizing a common operating system, Juniper Networks delivers
a consistent implementation and operation of control-plane
features across all products. To maintain that consistency, Junos
OS adheres to a highly disciplined development process that uses
a single source code, follows a single quarterly release train, and
employs a highly available modular architecture that prevents
isolated failures from bringing an entire system down.
These attributes are fundamental to the core value of the
software, enabling all Junos OS-based products to be updated
simultaneously with the same software release. All features are
fully regression-tested, making each new release a true superset
ofthepreviousversion;customerscandeploythesoftware
with complete confidence that all existing capabilities will be
maintained and operate in the same way.