Cisco Systems A9KMOD80TR Contents A-1, Using the ping Command, Configuration Error Messages, 6-10

Contents

F I N A L D R A F T - C i s c o C o n f i d e n t i a l

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

A P P E N D I X 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
	Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
6			OL-17502-01