Mx104 Component Redundancy - Juniper MX104 Hardware Manual

MX104 Component Redundancy

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Copyright © 2017, Juniper Networks, Inc.
The MX104 chassis provides redundancy and resiliency. The hardware system is fully
redundant, including power supplies, Routing Engines, and cooling system.
A fully configured router is designed so that no single point of failure can cause the entire
system to fail. Only a fully configured router provides complete redundancy. All other
configurations provide partial redundancy. The following major hardware components
are redundant:
Power supplies—In a redundant configuration, the router contains either two AC or DC
power supplies that install into the front of the chassis. The slots are labeled
(left to right). Each power supply provides power to all components in the router.
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When two power supplies are present, they share power almost equally within a fully
populated system. If one power supply in a redundant configuration fails or is removed,
the remaining power supplies assume the entire electrical load without interruption.
Two power supplies provide the maximum configuration with full power for as long as
the router is operational.
Routing Engine—If two Routing Engines are installed, one functions as the master and
the other functions as the backup. If the master Routing Engine fails, the backup can
take over as the master.
Cooling system—The cooling system has redundant components, which are controlled
by the host subsystem. If one of the fans fails, the host subsystem increases the speed
of the remaining fans to provide sufficient cooling for the router indefinitely.
MX104 3D Universal Edge Router Overview on page 3
MX104 Chassis Overview on page 4
Chapter 1: System Overview
and
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