M10I System Redundancy; Ac System Redundancy; Dc System Redundancy - Juniper M10i Hardware Manual

M10i Multiservice Edge Router Hardware Guide

M10i System Redundancy

AC System Redundancy

DC System Redundancy

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You can configure the router for system redundancy by using three AC or four DC
load-sharing, fully-redundant power supplies to distribute power to the other components.
AC system redundancy requires three independent AC power outlets. If one power supply
fails, the other two power supplies provide full power to the router's components
indefinitely.
You can set up increased AC system redundancy by using four AC power supplies. In this
case, two power supplies are powered from two AC outlets, and the other two power
supplies use two AC outlets from a UPS battery-backed power source. This lets the router
run during AC power outages for the amount of time that the UPS allows.
DC system redundancy requires two power sources from feed A and two power sources
from feed B. If one feed fails or is shut down for service, the other feed powers two DC
power supplies and can provide full power to the router's components indefinitely.
M10i Chassis Description on page 5
M10i Router Physical Specifications on page 183
Overview of M10i Router Installation on page 45
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