Juniper M Series User Manual

OC12c/STM4, OC48c/STM16, OC192c/STM64, and Tunnel services. For more information
on PICs used in the router, see the T320 Core Router PIC Guide.
The T320 router supports two DC power supplies, which share the load evenly.
Three Switch Interface Boards (SIBs) provide the switching function to the destination
FPC. The SIBs create the switch fabric for the router, providing up to a total of 320 million
packets per second (Mpps) of forwarding.
Routing and system management functions of the router are performed by the host
subsystem. The host subsystem consists of the Routing Engine and the Control Board.
The Routing Engine maintains the routing tables used by the router and controls the
routing protocols that run on the router. Each Control Board works with an adjacent
Routing Engine to provide control and monitoring functions for the router. These include
determining Routing Engine mastership, controlling power, reset and SONET clocking
for the other router components, monitoring and controlling fan speed, and monitoring
system status using I²C controllers.
Related
Documentation
T320 Router Major Hardware Components on page 30•
T320 Router Major Hardware Components
Table 12 on page 30 lists the T320 router major components and characteristics.
Table 12: T320 Router Major Hardware Components
Offline
Button
Field-
ReplaceableRedundantFunctionQuantityComponent
—Hot-pluggable—Provides ports for external management
and alarm relay devices
1Connector Interface
Panel (CIP)
YesHot-pluggableYesMonitors and controls router components1–2Control Board
—hot-removable,
hot insertable
YesCools router components2 front
fan trays,
1 rear fan
tray
Cooling system
—Hot-removable.
hot-insertable
—Displays status and provides an interface
for controlling router functions
1Craft interface
YesHot-removable,
hot-insertable
—Connect PICs to other router components,
contains Packet Forwarding Engines
1–8FPC
YesHot-removable,
hot-insertable
—Provides an interface to various network
media
1–2 per
FPC
PIC
—Hot-removable,
hot-insertable
YesDistributes needed voltages to router
components
2Power supply (DC only)
Copyright © 2012, Juniper Networks, Inc.30
M Series and T Series Routers Monitoring and Troubleshooting Guide

Juniper M Series Specifications

General

Brand	Juniper
Model	M Series
Category	Network Router
Language	English