T640 Router Major Hardware Components; Table 13: T640 Router Major Hardware Components - Juniper M Series Monitoring And Troubleshooting Manual

Related
Documentation

T640 Router Major Hardware Components

Table 13: T640 Router Major Hardware Components

Component
Connector Interface
Panel (CIP)
Control Board
Cooling system
Craft interface
FPC
PIC
Copyright © 2012, Juniper Networks, Inc.
SONET/SDH OC12c/STM4, OC48c/STM16, OC192c/STM64, and Tunnel Services. You
can install up to four PICs into the slots in each FPC. For more information on PICs used
in the router, see the T640 Core Router PIC Guide.
The 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 640 million
Mpps of forwarding. Five SIBs are installed in the router.
The host subsystem provides the routing and system management functions of the
router. 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.
ASICs are a definitive part of the router design; these ASICs enable the router to achieve
data rates that match current fiber-optic capacity.
T640 Router Major Hardware Components on page 33
Table 13 on page 33 lists the major T640 router components and characteristics.
Quantity Function
1 Provides ports for external management
and alarm relay devices
1–2 Monitors and controls router components
2 front fan Cools router components
trays,
1 rear fan
tray
1 Displays status and provides an interface
for controlling router functions
1–8 Connect PICs to other router components,
contains Packet Forwarding Engines
1–4 per Provides an interface to various network
FPC media
Chapter 2: T Series Core Routers
Field-
Redundant Replaceable
— Hot-pluggable
Yes Hot-pluggable
Yes hot-removable,
hot insertable
— Hot-removable.
hot-insertable
— Hot-removable,
hot-insertable
— Hot-removable,
hot-insertable
Offline
Button
—
Yes
—
—
Yes
Yes
33