(Optional) Specifies the maximum number of entries retained in the configuration log. Router(config-archive-log-config)# logging size 200
This tool allows administrators to track any configuration change made to the Cisco IOS XE software running configuration, and identify the user that made that change. The Configuration Change Notification and Logging feature allows the tracking of configuration changes entered by users on a per-session and per-user basis. Syslog notifications allow monitoring of the configuration log information without performing polling and information gathering tasks. You can configure the Configuration Change and Notification Logging feature to send notification of configuration changes to the Cisco IOS XE software system logging (syslog) process. Configuration Change Notifications and Config Change Logging
You can display information from the configuration log through the use of the show archive log config command, with the exception of the parser return codes, which are for use by internal Cisco IOS XE applications only.
This archive saves `configuration logs' that track each configuration command that is applied, who applied the command, the parser return code (PRC) for the command, and the time the command was applied. The Configuration Change Notification and Logging (Config Log Archive) feature allows the tracking of configuration changes entered on a per-session and per-user basis by implementing an archive function. This comparison method can identify changes that occurred, but does not specify the sequence in which the changes occurred, or the person responsible for the changes. Prior to the introduction of this feature, the only way to determine if the Cisco IOS XE software configuration had changed was to save a copy of the running and startup configurations to a local computer and do a line-by-line comparison. Configuration Change Notification and Logging