Cisco IOS Configuration Change Logging

Someone or something caused your router to reboot. You want to log configuration changes to rule that out without using TACACS. Here’s what it looks like.


router(config)# archive
router(config-archive)# log config
router(config-archive-log-cfg)# logging enable
router(config-archive-log-cfg)# logging size 1000
router(config-archive-log-cfg)# notify syslog
router(config-archive-log-cfg)#

To display configuration log entries by record numbers starting with the first recorded command
show archive log config 1

To display all configuration log files as they would appear in a configuration file rather than in a tabular format
show archive log config all provisioning

To view statistics
show archive log config statistics


router# show archive log config statistics
Config Log Session Info:
        Number of sessions being tracked: 1
        Memory being held: 3909 bytes
        Total memory allocated for session tracking: 187657 bytes
        Total memory freed from session tracking: 183748 bytes

Config Log log-queue Info:
        Number of entries in the log-queue: 63
        Memory being held by the log-queue: 16356 bytes
        Total memory allocated for log entries: 16356 bytes
        Total memory freed from log entries: 0 bytes

For more information: http://www.cisco.com/c/en/us/td/docs/ios/fundamentals/configuration/guide/15_1s/cf_15_1s_book/cf_config-logger.html

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