This read-write TimeTicks value, when set, schedules the device to reboot that many hundredths of a second later; if unset it reads back as 4294967295, and setting it to that same value cancels a pending scheduled reboot, subject to a maximum delay set by the host's reboot_delay_max parameter. An admin uses this to schedule a maintenance reboot for a specific future moment without needing to be present when it triggers, or to cancel one already scheduled. For example, setting rlRebootDelay appropriately schedules a reboot roughly 10 minutes out, giving remote users time to save work before the switch restarts.