Power Supplies; Ex8216 Switch Hardware Overview - Juniper JUNOS OS 10.3 - SOFTWARE Manual

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EX8216 Switch Hardware Overview

36
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OS for EX Series Ethernet Switches, Release 10.3
the chassis and provides side-to-side chassis cooling. See Cooling System and Airflow
in an EX8208 Switch.
Power supplies for the EX8208 switch are fully redundant, load-sharing, and
hot-removable and hot-insertable field-replaceable units (FRUs). Each EX8208 switch
chassis can hold up to six 2000 W AC, six 3000 W AC, or six 2000 W DC power supplies.
The 2000 W AC power supplies support both low-voltage line (100–120 VAC) and
high-voltage line (200–240 VAC) AC power configurations on an EX8208 switch. Each
2000 W AC power supply delivers 2000 W of power at high-voltage line (200–240 VAC)
or 1200 W at low-voltage line (100–120 VAC) to the EX8208 chassis.
Each 3000 W AC power supply delivers 3000 W of power at high-voltage line (200–240
VAC) input to the EX8208 chassis. Low-voltage line input is not supported for the 3000
W AC power supplies on the EX8208 switch.
Each DC power supply delivers 2000 W of power to the chassis when the input voltage
is in the range –40 VDC through –72 VDC.
Only two AC power supplies are required for the base AC configuration and switch
powerup. The redundant AC configuration ships with six AC power supplies to provide
the capacity to power the system using N+1 or N+N power redundancy. See AC Power
Supply in an EX8200 Switch and EX8208 Switch Configurations.
The redundant DC configuration ships with four DC power supplies. The dual inputs of
the DC supplies provide direct support for N+N power redundancy. The redundant
configuration also provides sufficient capacity for N+1 redundancy in most configurations;
if necessary, up to two additional DC supplies can be added to the system. See DC Power
Supply in an EX8200 Switch and EX8208 Switch Configurations.
CAUTION: Mixing different types of power supplies in the same chassis is
not supported.
Field-Replaceable Units in an EX8208 Switch
Connecting and Configuring an EX Series Switch (CLI Procedure) on page 187
Connecting and Configuring an EX Series Switch (J-Web Procedure) on page 189
The Juniper Networks EX8216 Ethernet Switch is a half-rack, midplane architecture,
modular Ethernet switch that is designed for ultra high-density environments such as
campus aggregation, data center, or high performance core switching environments.
EX8216 switches provide high-availability and redundancy for all major hardware
components, including Routing Engine (RE) modules, Switch Fabric (SF) modules, fan
trays (with redundant fans), and load-sharing 2000 W AC, 3000 W AC and 3000 W DC
Copyright © 2010, Juniper Networks, Inc.