Kron task scheduler

KRON is a feature of Cisco IOS devices that is known as the "command scheduler."

The Command Scheduler allows network admins to schedule EXEC mode CLI commands to run once, at specified intervals, at specified calendar dates and times, or upon system startup.

Command Scheduler has two basic processes:

1. Policy lists - A policy list is configured containing lines of fully-qualified EXEC CLI commands to be run at the same time or same interval.
2. Occurrences - One or more policy lists are then scheduled to run after a specified interval of time, at a specified calendar date and time, or upon system startup. Each scheduled occurrence can be set to run either once only or on a recurring basis.

Links:

https://gns3vault.com/network-management/kron-task-scheduler

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/cns/configuration/15-mt/cns-15-mt-book/cns-cmd-sched.html#d25e272a1635