Troubleshooting Using a Subsystem Approach
Normal Router Startup Sequence
Troubleshooting the Power Subsystem
Troubleshooting the AC Input Power Subsystem
Troubleshooting the DC Input Power Subsystem
Troubleshooting a DC Power Module
Additional Power Subsystem Troubleshooting Information
Obtaining Temperature and Environmental Information
Troubleshooting the Power Distribution System
Troubleshooting the Route Processor Subsystem
RSP and RP Front Panel Indicators
Fabric Card Front Panel Indicator
Troubleshooting Line Cards and Modular Port Adapters
Monitoring Critical, Major, and Minor Alarm Status
Troubleshooting the Cooling Subsystem
Isolating Cooling Subsystem Problems
Replacing Cisco ASR 9000 Series Router Components
C H A P T E R 5
Replacing the Chassis Air Filter
Removing and Replacing the Fan Trays
Cisco ASR 9000 Series Aggregation Services Router Hardware Installation Guide
vii
Contents