Configuring Switch Boot Optimization
This chapter describes how to configure the Switch Boot Optimization feature for Cisco Connected Grid switches.
Supported Hardware
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Cisco Connected Grid Ethernet Switch Module Interface Card Software Configuration Guide |
Information About Switch Boot Optimization
The normal switch boot process involves a memory test, file system check (FSCK), and power-on self-test (POST).
The boot fast command in global configuration mode minimizes switch boot time by disabling these tests. By default, boot fast is disabled.
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.
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.
The boot loader performs its normal full memory test and FSCK check with LED status progress. If the memory and FSCK tests are successful, the system performs additional POST tests and the results are displayed on the console.
After the system comes up successfully, the fast boot feature is reenabled.
Configuring Switch Boot Optimization
The memory test, filesystem check and POST are required for proper functioning of the system. Enabling switch boot optimization may lead to uncertain system behavior.
To enable the switch boot optimization feature, enter the following global configuration command:
To disable the switch boot optimization feature, enter the following command:
Verifying Switch Boot Optimization Configuration
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Display information about the switch boot optimization configuration |
Boot Fast Output Example
The following is example output for boot fast on a CGS 2520.
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