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Fan Modules
Related
Documentation
JCS1200 Software Components
JCS Management Module CLI Overview
Copyright © 2010, Juniper Networks, Inc.
Each pair of power modules operates as a redundant pair. If either power module fails,
the remaining power module continues to supply power, but there is no redundancy.
Replace a failed power module as soon as possible.
The JCS1200 platform comes with four hot-swappable fan modules for cooling
redundancy. The fan module speeds vary depending on the ambient air temperature
within the JCS1200 platform.
If the ambient temperature is 25°C (77°F) or below, the JCS1200 platform fan modules
will run at their minimum rotational speed. If the ambient temperature is above 25°C
(77°F), the fan modules will run faster, increasing their speed as required to control
internal JCS1200 platform temperature.
Each fan module contains two fans operating as a pair in a series. If one fan fails, the
remaining fan will run at full speed and continue to cool the JCS1200 platform. To maintain
cooling redundancy, replace a failed fan module as soon as possible.
JCS1200 Software Components on page 23
The JCS1200 software includes the following concepts and components:
JCS Management Module CLI Overview on page 23
Logging In to the JCS Management Module CLI on page 24
Getting Help on JCS Commands on page 24
Setting the JCS Management Module Command Target on page 25
JCS Switch Module Script on page 26
The JCS management module command-line interface (CLI) is the software interface
you use to access and configure the Juniper Networks Control System (JCS). You can
access the JCS management module CLI through a local connection to the serial port
on the JCS management module. Or, you can access the CLI from a remote network
management station on the network through the console (Ethernet) connector.
The JCS management module CLI is a straightforward command interface. You type
commands on a single line, and commands are executed when you press the Enter key.
The CLI provides command help and command history.
Unlike the Junos OS CLI, in which configuration commands you enter are stored in a
candidate configuration and the changes you add are not activated until you commit the
configuration, configuration commands you enter with the JCS management module
CLI are activated as soon as you enter the command.
General information about JCS CLI commands includes:
Chapter 3: JCS1200 Platform Components
23
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