System Redundancy; Ac System Redundancy; Table 5: Field-Replaceable Units - Juniper M10i Hardware Manual

M10i Internet Router Hardware Guide
Table 5

Table 5: Field-Replaceable Units

Hot-Removable and
Hot-Insertable FRUs
Fan tray
Physical Interface Card
(PIC)
Power supply (AC or DC)
Small form-factor pluggable
(SFP)
For FRU replacement instructions, see

System Redundancy

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

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.
4
System Redundancy
Hot-removable and hot-insertable FRUs—You can remove and replace these
components without powering off the router or disrupting the routing functions.
Hot-pluggable FRUs—You can remove and replace these components without
powering off the router, but the routing functions of the system are interrupted
when the component is removed. If a component is acting as a backup, it can
be removed without affecting router functions.
FRUs that require powering off the router—You must power off the router before
removing these components.
on page 4 lists the FRUs for the M10i router.
Hot-Pluggable FRUs
Compact Forwarding
Engine Board (CFEB)
High-Availability Chassis
Manager (HCM)
Routing Engine
FRUs that require
powering off the router
None
"Replacing Hardware Components" on page 87.