Controlling environment variables – Dell POWEREDGE M1000E User Manual

Page 103

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Cisco Catalyst Blade Switch 3130 and 3032 for Dell Software Configuration Guide

OL-13270-03

Chapter 3 Assigning the Switch IP Address and Default Gateway

Modifying the Startup Configuration

Beginning in privileged EXEC mode, follow these steps to configure the switch to boot up a specific
image during the next boot cycle:

To return to the default setting, use the no boot system global configuration command.

Controlling Environment Variables

With a normally operating switch, you enter the boot loader mode only through a switch console
connection configured for 9600 b/s by performing these tasks:

1.

Power off the switch by using the chassis management module GUI or by removing the switch from
the enclosure.

2.

Power on the switch by using the GUI or re-inserting the switch in the enclosure.

3.

Press the switch Mode button while powering on the switch.

You can release the Mode button a second or two after the LED above port 1 turns off. Then the
boot loader switch: prompt appears.

The switch boot loader software provides support for nonvolatile environment variables, which can be
used to control how the boot loader, or any other software running on the system, behaves. Boot loader
environment variables are similar to environment variables that can be set on UNIX or DOS systems.

Environment variables that have values are stored in flash memory outside of the flash file system.

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

boot system filesystem:/file-url

Configure the switch to boot up a specific image in flash memory during
the next boot cycle.

For filesystem:, use flash: for the system board flash device.

For file-url, specify the path (directory) and the name of the bootable
image.

If you enter this command on a stack master, the specified software image
is loaded only on the stack master during the next boot cycle.

Filenames and directory names are case sensitive.

Step 3

boot system switch {number | all}

(Optional) For stacking-capable switches, specify the switch members on
which the system image is loaded during the next boot cycle:

Use number to specify a stack member.

Use all to specify all stack members.

Step 4

end

Return to privileged EXEC mode.

Step 5

show boot

Verify your entries.

The boot system global command changes the setting of the BOOT
environment variable.

During the next boot cycle, the switch attempts to automatically boot up the
system using information in the BOOT environment variable.

Step 6

copy running-config startup-config

(Optional) Save your entries in the configuration file.

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