Juniper JUNOS - NETWORK OPERATION GUIDE REV1 User Manual

JUNOS Internet Software Network Operations Guide: Hardware
42 ! Monitoring T640 Routing Node Components
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.
Monitoring T640 Routing Node Components
See the following chapters for information about monitoring and troubleshooting
the T640 routing node components:
! “Monitoring the Router Chassis” on page 107
! “Monitoring the Routing Engine” on page 125
! “Monitoring Redundant Routing Engines” on page 491
! “Monitoring FPCs” on page 163
! “Monitoring PICs” on page 183
! “Monitoring the Craft Interface” on page 197
! “Monitoring Power Supplies” on page 217
! “Monitoring Redundant Power Supplies” on page 507
! “Monitoring the Cooling System” on page 251
! “Monitoring Redundant Cooling System Components” on page 523
! “Maintaining the Cable Management System, Cables, and Connectors” on
page 275
! “Monitoring the Host Subsystem” on page 289
! “Host Redundancy Overview” on page 463
SONET Clock Generator
(SCG)
1 - 2 Provides Stratum 3 SONET/SDH clockings Yes Hot-pluggable Yes
SIB 5 Provides switch fabric 4 active,
1 standby
Hot-removable,
hot-insertable
Yes
Component Quantity Function Redundant
Field-
Replaceable
Offline
Button

Juniper JUNOS - NETWORK OPERATION GUIDE REV1 Specifications

General

Brand	Juniper
Model	JUNOS - NETWORK OPERATION GUIDE REV1
Category	Software
Language	English