What are Coldboot and Warmboot used for?

Warmboot is a software reset of the module that also causes the unit to reload its configuration.

Coldboot is a hardware reset of the module which has the same effect of powercycling the module.

In-Chassis modules which are configured via ladder logic must be reset before the configuration changes will be applied.  This can occur through a Warmboot, Coldboot, or a powercycle.