Describes the type of reboot that occurred the last time the host device rebooted. Unknown(0), unknown reboot. 0 is used as a sentinel value to denote that the reboot reporting mechanism is initialized and ready for use. If it appears in a reboot report as a reboot reason, it means that something (of unknown cause) prevented a reboot reason from being saved. This is a spontaneous reboot. Davic/DOCSIS(1), Davic/DOCSIS switch. The set-top rebooted because the network switched from Davic to DOCSIS or vice versa. This is a controlled reboot. User(2), User reboot. The set-top rebooted at the specific request of the user, typically the MSO, but can also be the subscriber. Includes, but not limited to, headend-initiated reboots, pass-thru and SNMP messages to reboot, new application versions that require a reboot in order to reload, the staging toolkit, hard disk re-format requests, CableCARD inserted or firmware upgrade, and more. This is a controlled reboot. System(3), System reboot. The set-top rebooted because its software determined it cannot continue operation. This can be due to any number of reasons, including: detection of logic errors, exhaustion of various system resources, detection of memory corruption, and more. This is a spontaneous reboot. Trap(4), Trap reboot. A fatal error detected by the CPU. This varies between CPU manufacturers; some possible causes are illegal address references, misaligned instruction or data access, memory protection violations, attempt to decode an unrecognized instruction, etc. This is a spontaneous reboot. Silent or Watchdog(5). Depending on platform, this is either a Silent Reboot (A reboot of unknown origin that reports no information) or a Watchdog reboot. This is a spontaneous reboot. Bootloader(6), Bootloader reboot. For use by bootloader software. This is a spontaneous reboot. PowerUp(7), Power-up reboot. The set-top rebooted because power was lost and then restored. This is a controlled reboot. Upgrade(8), Upgrade Reboot due to loading new resident set-top software. This is a controlled reboot. Hardware(9), Hardware Reset reboot. This depends on the design of a particular set-top. It might be due to a hardware reset line being triggered or by a button push of some kind. Manufacturers sometimes provide a way to hard reset a box besides removing power. This is a spontaneous reboot. CablecardError(10), CablecardError. The Host rebooted because the communication with the CableCARD was lost and could not be reestablished.