H3C Technologies H3C SecBlade NetStream Cards - Manual (Page 256)

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Software upgrade configuration
This chapter includes these sections:
• Device software overview
• Software upgrade methods
• Software upgrade through a system reboot
• Software upgrade by installing hotfixes
• Displaying and maintaining software upgrade
• Software upgrade configuration examples
Device software overview
Device software comprises the Boot ROM program and the system boot file. After powered on, the device
runs the Boot ROM program, initializes the hardware, and displays the hardware information. Then the
device runs the boot file. The boot file provides drivers and adaption for hardware, and implements
service features. The Boot ROM program and system boot file are required for the startup and running of
a device. Figure 71 illustrates their relationship.
Figure 71 Relationship between the Boot ROM program and the system boot file