Specifications

CHAPTER
3-1
System Management Software Configuration Guide for Cisco IE 2000U and Connected Grid Switches
3
Configuring Switch Boot Optimization
This chapter describes how to configure the Switch Boot Optimization feature for Cisco Industrial
Ethernet 2000U Series (IE 2000U) and Connected Grid Switches, hereafter referred to as switch.
This chapter includes the following sections:
• Information About Switch Boot Optimization, page 3-1
• Prerequisites, page 3-2
• Guidelines and Limitations, page 3-2
• Default Settings, page 3-2
• Configuring Switch Boot Optimization, page 3-2
• Verifying Configuration, page 3-2
• Configuration Example, page 3-3
• Feature History, page 3-3
Information About Switch Boot Optimization
The normal switch boot process involves a memory test, file system check (FSCK), and power-on
self-test (POST). For details about the normal boot process, see the “Boot Process” section on page 2-2.
The boot fast command in global configuration mode minimizes switch boot time by disabling these
tests.
If the system crashes when boot fast is enabled, reload sequences occur immediately if your switch is
set up to automatically bring up the system by using information in the BOOT environment variable.
Otherwise, these reload sequences occur after you enter the manual boot command in bootloader
configuration mode.
First Reload
The switch disables the boot fast feature and displays the following warning message:
“Saving the crash information to flash.
Reloading with boot fast feature disabled...”
After the system message appears, the system saves the crash information and automatically resets itself
for the next reload cycle.