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FINAL DRAFT - Cisco Confidential
Contents
6
Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-17502-01
Additional Sources for Information 6-1
Basic Troubleshooting Commands 6-1
Using show Commands to Display System Status and Configuration 6-2
Using the ping Command 6-2
Examples 6-2
Using the traceroute Command 6-3
Examples 6-3
Using debug Commands 6-3
Viewing a List of Debug Features 6-4
Enabling Debugging for a Feature 6-4
Viewing Debugging Status 6-5
Disabling Debugging for a Service 6-5
Disabling Debugging for All Services Started at the Active Terminal Session 6-5
Disabling Debugging for All Services Started at All Terminal Sessions 6-6
Configuration Error Messages 6-6
Configuration Failures During a Commit Operation 6-6
!Configuration Errors at Startup 6-7
Memory Warnings in Configuration Sessions 6-7
Understanding Low-Memory Warnings in Configuration Sessions 6-7
“WARNING! MEMORY IS IN MINOR STATE” 6-8
“ERROR! MEMORY IS IN SEVERE (or CRITICAL) STATE” 6-8
Viewing System Memory Information 6-8
Removing Configurations to Resolve Low-Memory Warnings 6-9
Clearing a Target Configuration 6-10
Removing Committed Configurations to Free System Memory 6-10
Rolling Back to a Previously Committed Configuration 6-10
Clearing Configuration Sessions 6-11
Contacting TAC for Additional Assistance 6-11
Interfaces Not Coming Up 6-11
Verifying System Interfaces 6-12
APPENDIX
A
Understanding Regular Expressions, Special Characters, and Patterns A-1
Contents A-1
Regular Expressions A-1
Special Characters A-2
Character Pattern Ranges A-2
Multiple-Character Patterns A-3