1-47
Cisco IOS XR Troubleshooting Guide for the Cisco CRS-1 Router
OL-21483-02
Chapter 1 General Troubleshooting
Validating and Troubleshooting Cisco IOS XR Software Configuration
In the following example, a check of the current configuration for any missing configurations is run and
the results are displayed.
RP/0/RP0/CPU0:router# cfs check
Creating any missing directories in Configuration File system...OK
Initializing Configuration Version Manager...OK
Syncing commit database with running configuration...OK
Re-initializing cache files...OK
Updating Commit Database. Please wait...[OK]
Using the show configuration failed Command
Use the show configuration failed command to browse a failed configuration. The configuration can be
classified as failed during startup or during a configuration commit.
• Startup Failed Configuration, page 1-47
• Commit Configuration Failed, page 1-48
Startup Failed Configuration
A configuration can be classified as failed during startup for three reasons:
• Syntax errors—syntax errors are generated by the parser and usually indicate that there is an
incompatibility with the command-line interface (CLI) commands. Correct the syntax errors and
reapply the configuration. A syntax error can be an invalid CLI entry or a CLI syntax change. See
the “Obtaining Documentation and Submitting a Service Request” section on page viii in the
Preface for information on obtaining Cisco IOS XR software CLI documentation.
• Semantic errors—semantic errors are generated by the backend components when the configuration
is being restored by the configuration manager during startup of the router. Semantic errors include
logical problems (invalid logic).
• Apply errors—apply errors are generated when a configuration has been successfully verified and
accepted as part of running configuration but the backend component is not able to update its
operational state. The configuration shows both as the running configuration (since it was correctly
verified) and as a failed configuration because of the backend operational error. To find the
component apply owner, use the describe on the CLI that failed to be applied.
Note You may browse startup failed configurations for up to the previous four router reloads.
Use the show configuration failed startup command and the load configuration failed startup
command to browse and reapply any failed configuration. The load configuration failed startup
command can be used in configuration mode to load the failed startup configuration into the target
configuration session, then the configuration can be modified and committed. See Cisco IOS XR Getting
Started Guide for information on committing a configuration.
RP/0/RP0/CPU0:router# show configuration failed startup
!! CONFIGURATION FAILED DUE TO SYNTAX/AUTHORIZATION ERRORS
telnet vrf default ipv4
server max-servers 5 interface POS0/7/0/3 router static
address-family ipv4 unicast
0.0.0.0/0 172.18.189.1
!! CONFIGURATION FAILED DUE TO SEMANTIC ERRORS
To Next Page
Loading...
Need help?
General
