T640 Core Router Overview - Juniper M Series Monitoring And Troubleshooting Manual

Table 12: T320 Router Major Hardware Components (continued)
Component
Routing Engine
SONET Clock Generator
(SCG)
SIB
Related
Documentation

T640 Core Router Overview

Copyright © 2012, Juniper Networks, Inc.
Quantity Function
1–2 Provides routing functions and routing
tables
1–2 Provides Stratum 3 SONET/SDH clocking
3 Provides switch fabric
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.
T320 Core Router Overview on page 27
The T640 Core Router provides 40G capable platform, delivering 640 Gigabits per second
(Gbps) of capacity and up to 770 million packets per second (Mpps) of throughput and
supports 32 10-Gbps (OC192c/STM64 and 10-Gigabit Ethernet) ports, as well as
OC48c/STM16. Gigabit Ethernet, SONET/SDH, and other high-speed interfaces for large
core networks and network applications, such as those supported by Internet service
providers (ISPs). It provides a cost-effective migration path to an Multiprotocol Label
Switching (MPLS) infrastructure. The T640 router supports the Junos OS, which provides
router configuration and monitoring. (See
Chapter 2: T Series Core Routers
Field-
Redundant Replaceable
Yes Hot-removable,
hot-insertable
Yes Hot-pluggable
2 active, Hot-removable,
1 standby hot-insertable
Figure 14 on page 32.)
Offline
Button
Yes
Yes
Yes
31