Table 11: M320 Router Major Hardware Components - Juniper M Series Monitoring And Troubleshooting Manual

Table 11: M320 Router Major Hardware Components

Component
Connector Interface
Panel (CIP)
Control Board
Cooling system
Craft interface
FPCs
Host subsystem
PICs
Power supply (DC only)
Routing Engine
SIBs
Copyright © 2012, Juniper Networks, Inc.
Quantity Function
1 Provides ports for external management
and alarm relay devices; includes an
electrostatic discharge (ESD) point
1–2 Monitors and controls router components
(requires a Routing Engine)
2 front Cools router components
fan trays,
1 rear fan
tray
1 Displays status and provides an interface
for controlling router functions
1–8 Connect PICs to other router components,
contain Packet Forwarding Engines
(supports FPC1, FPC2, and FPC3)
1–2 Consists of a Routing Engine and Control
Board and provides routing and system
management functions
1–4 per Provide an interface to various network
FPC media
2 Distributes needed voltages to router
components
1–2 Provides routing functions and routing
tables (requires a Control Board)
4 Provide switching function to the
destination FPC
Field-replaceable units (FRUs) are router components that can be replaced at the
customer site. Replacing FRUs requires minimal router downtime. There are three types
of FRUs:
Hot-removable and hot-insertable—You can remove and replace the component
without powering down the router or interrupting the routing functions.
Hot-pluggable—You can remove the component without powering down the router,
but routing functions are interrupted until the replacement is installed.
Requires router shutdown—You must power down the router before removing the
component.
Chapter 1: M Series Multiservice Edge Routers
Field-
Redundant Replaceable
— Hot-pluggable
Yes Hot-pluggable
(if not
redundant)
Yes Hot-removable,
Hot insertable
— Hot-removable.
hot-insertable
— Hot-removable,
hot-insertable
Yes Hot-pluggable
— Hot-removable,
hot-insertable
Yes Hot-removable,
hot-insertable
Yes Hot-pluggable
(if not
redundant)
Yes Hot-removable,
hot-insertable
Offline
Button
—
Yes
—
—
Yes
—
Yes
—
Reset
button
Yes
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