Most of the Serversystems have a Baseboard Management Controller (BMC) integrated for maintenace and management tasks.
Typical functions are, indepentend from the running operating system:
- Shutdown and reboot
- Switch Power On and Off
- KVM (Keyboard, Video, Mouse) redirection
- Hardware monitoring
- USB redirection, connect the local DVD Drive to the Server over a LAN connection
- and much more…
Usually, the BMC has its own LAN Interface and therefore an own IP Address.