Cisco ASR 9901 Hardware Installation Guide

Normal Router Startup Sequence 102
Identifying Startup Issues 102
Troubleshooting the Power Subsystem 103
Troubleshooting the AC-Input Power Subsystem 103
Troubleshooting the DC-Input Power Subsystem 107
Additional Power Subsystem Troubleshooting Information 110
Hardware and Software Identification 111
Obtaining Temperature and Environmental Information 111
Troubleshooting the Power Distribution System 115
Troubleshooting the Route Processor Subsystem 115
Route Processor Overview 116
RP Front Panel Indicators 117
LED Matrix Display 119
Ethernet Ports and Status LEDs 120
Auxiliary and Console Ports 121
Monitoring Critical, Major, and Minor Alarm Status 121
Troubleshooting the Line Card 122
Initial Boot Process 122
Status LEDs 122
Configuring and Troubleshooting Line Card Interfaces 123
Configuration Parameters 123
Line Card Interface Address 123
Using Configuration Commands 123
Basic Line Card Configuration 123
Verifying the Transceiver Modules 125
Advanced Line Card Troubleshooting 126
Troubleshooting the Cooling Subsystem 127
Fan Tray Operation 127
Power Module Fans 128
Over-temperature Conditions 128
Isolating Cooling Subsystem Problems 129
Replacing Router Components 131
CHAPTER 5
Prerequisites and Preparation 131
Cisco ASR 9901, ASR 9001, and ASR 9001-S Routers Hardware Installation Guide
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Contents

Cisco ASR 9901 Specifications

General

Chassis Height	1 RU
Rack Mounting	Yes
Redundancy	Yes
Operating System	Cisco IOS XR
Switching Capacity	Up to 1.2 Tbps
Memory	16 GB
Power Supply	Dual redundant AC or DC
Interfaces	10GE, 100GE
Operating Temperature	0 to 40°C (32 to 104°F)
Input Voltage	100-240V AC
Power Consumption	Varies based on configuration
Storage	64 GB SSD
Humidity	5% to 95% (non-condensing)