Srx5400 Firewall Component Redundancy - Juniper SRX5400 Hardware Manual

Table 1: Field-Replaceable Units
Field-Replaceable Units (FRUs)
Routing Engine
SCBs
SPCs
MPCs
MICs

SRX5400 Firewall Component Redundancy

The following major hardware components are redundant:
• Power supplies—The firewall is configurable with two, three, or four AC power supplies at the rear of
the chassis in slots PEM0 through PEM3 (left to right)or two DC power supplies in slots PEM0 and
PEM2.
• In the low-line (110VAC input) configurations, two power supplies are required to support the
firewall electrical requirements. By default, the AC powered firewalls are configured with three AC
(2+1) power supplies, you can add a fourth power supply for fault tolerance. The fourth power
supply is used when one of the power supplies in the 2+1 configuration fails.
• In the high-line (220VAC input) configurations, two power supplies are required to support the
firewall electrical requirements. By default, the AC powered firewalls are configured with three AC
(2+1) power supplies and this configuration supports PEM redundancy only. You can add a fourth
power supply (2+2) for both PEM and feed redundancy.
• In the DC powered firewalls two DC (1+1) power supplies are required to support the firewall
electrical requirements. The minimum power supplies requirement is one and the second power
supply provides redundancy. If one power supply fails the second power supply 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.
(Continued)
Action
Power off the firewall to install, remove, or replace any of these
FRUs.
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