Srx5600 Services Gateway Component Redundancy - Juniper SRX5600 Hardware Manual

SRX5600 Services Gateway Component Redundancy

Related
Documentation
Copyright © 2010, Juniper Networks, Inc.
The following major hardware components are redundant:
SCBs—The host subsystem consists of a Routing Engine installed in an SCB. The device
must have one host subsystem installed. You can install a second SCB for redundancy.
If a second SCB is installed, the host subsystem SCB functions as the master and the
other functions as the backup. If the SCB of the host subsystem fails, the other SCB
takes over as the master.
Power supplies—In the low-line (110 V) AC power configuration, the device contains
three or four AC power supplies, located horizontally at the rear of the chassis in slots
through (left to right). Each AC power supply provides power to all
PEM0 PEM3
components in the device. When three power supplies are present, they share power
almost equally within a fully populated system. Four AC power supplies provide full
power redundancy. If one power supply fails or is removed, the remaining power supplies
instantly assume the entire electrical load without interruption. Three power supplies
provide the maximum configuration with full power for as long as the device is
operational.
In the high-line (220 V) AC power configuration, the device contains two or four AC
power supplies located horizontally at the rear of the chassis in slots
(left to right). Each AC power supply provides power to all components in the
PEM3
device. When two or more power supplies are present, they share power almost equally
within a fully populated system. Four AC power supplies provide full power redundancy.
If one power supply fails or is removed, the remaining power supplies instantly assume
the entire electrical load without interruption. Two power supplies provide the maximum
configuration with full power for as long as the device is operational.
In the DC configuration, two power supplies are required to supply power to a fully
configured device. One power supply supports approximately half of the components
in the device, and the other power supply supports the remaining components. The
addition of two power supplies provides full power redundancy. If one power supply
fails or is removed, the remaining power supplies instantly assume the entire electrical
load without interruption. Two power supplies provide the maximum configuration
with full power for as long as the device is operational.
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 services gateway indefinitely.
SRX5600 Services Gateway Chassis on page 7
SRX5600 Services Gateway Switch Control Board Description on page 22
SRX5600 Services Gateway Power System Overview on page 33
SRX5600 Services Gateway Cooling System Description on page 37
Chapter 1: Introduction to the SRX5600 Services Gateway
through
PEM0
5