Backplane In An Ex6210 Switch - Juniper EX6210 Complete Hardware Manual

Complete Hardware Guide for EX6210 Ethernet Switches
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Backplane in an EX6210 Switch

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The Switch Fabric and Routing Engine (SRE) module monitors the temperature of switch
components. Under normal operating conditions, the fans in the fan tray run at less than
full speed. If a fan fails or the ambient temperature rises, the speed of the remaining fans
is automatically adjusted to keep the temperature within the acceptable range, 32°F
(0°C) through 104°F (40°C).
The fan tray continues to operate indefinitely and provide sufficient cooling even when
a single fan fails provided the room temperature is within the operating range. You can
check the status of fans and the chassis temperature from the Environment Status option
in the Status menu on the LCD panel. See
You cannot replace a single fan. If one or more fans fail, you must replace the entire fan
tray.
Field-Replaceable Units in an EX6210 Switch on page 25
Installing a Fan Tray in an EX6210 Switch on page 154
Removing a Fan Tray from an EX6210 Switch on page 213
The backplane is a printed circuit board that forms the back of the line card cage. The
Switch Fabric and Routing Engine (SRE) modules, power supplies, and line cards plug
into the backplane from the front of the chassis. The backplane contains an EEPROM
that stores the serial number and revision level of the backplane.
The backplane performs the following functions:
Power distribution—The backplane distributes power to all the switch components
from the power supplies that plug into it.
Control-signal connectivity—The backplane transports the control signals exchanged
by system components for monitoring, control, and management purposes.
Transfer of data between line cards and SRE modules—The backplane provides
connectivity for data traffic to and from the line cards and the SRE modules.
WARNING: High levels of electrical energy are distributed across the switch
backplane. Do not touch the backplane connectors, or any component
connected to the backplane, with any metallic object while servicing
components installed in the switch or while replacing the fan tray.
AC Power Supplies in an EX6200 Switch on page 38
DC Power Supply in an EX6200 Switch on page 49
"LCD Panel in an EX6200 Switch" on page
Copyright © 2014, Juniper Networks, Inc.
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