Backup a Cisco Config Automatically – Time (Kron Method)

In order to get a router to copy the running-config to startup-config, for example every Sunday at 23:00, complete these steps:

1 - Create a kron policy list—This is the script that lists what commands the router should run at the scheduled time.

Router#enable
Router#configure terminal
Router(config)#kron policy-list Backup
Router(config-kron-policy)#cli show startup-config | redirect tftp://192.168.1.252/test.cfg
Router(config-kron-policy)#exit

cli—Specifies EXEC CLI commands within a Command Scheduler policy list.
policy-list—Specifies the policy list associated with a Command Scheduler occurrence.

Note: The reason why write was used rather than copy running-config startup-config is because kron does not support interactive prompts and the copy running-config startup-config command requires interaction. It is important to remember this when you create commands. Also, note that kron does not support configuration commands.


2 - Create a kron occurrence—This informs the router when and how often the policy should run.

Router(config)#kron occurrence SaveConfigSchedule at 23:00 Sun recurring
Router(config-kron-occurrence)#policy-list Backup

SaveConfigSchedule—This is the name of occurrence. Length of occurrence-name is from 1 to 31 characters. If the occurrence-name is new, an occurrence structure will be created. If the occurrence-name is not new, the existing occurrence will be edited.

at—Identifies that the occurrence is to run at a specified calendar date and time.
recurring—Identifies that the occurrence is to run on a recurring basis.


3 - Verify the kron configuration by using the show command.

Router#show kron schedule
Kron Occurrence Schedule
SaveConfigSchedule inactive, will run again in 1 days 12:37:47 at 23:00 on Sun

inactive—Means that kron is not running the command(s) at present.
active—Means that kron is running the current command(s).


Router#show running-configuration
...
kron occurrence SaveConfigSchedule at 23:00 Sun recurring
policy-list Backup
!
kron policy-list Backup
cli show startup-config | redirect tftp://192.168.1.252/test.cfg
...


Note: You can use this to schedule other things, just change the the policy-list, to what you want.

Based On: http://www.cisco.com/en/US/products/sw/iosswrel/ps1835/products_tech_note09186a008020260d.shtml