Switch Memory and Configuration

Overview

Overview

This chapter describes:

How switch memory manages configuration changes

How the CLI implements configuration changes

How the menu interface and web browser interface implement configu­ ration changes

How the switch provides software options through primary/secondary flash images

How to use the switch’s primary and secondary flash options, including displaying flash information, booting or restarting the switch, and other topics

Configuration File Management

The switch maintains two configuration files, the running-configfile and the startup-configfile.

Volatile Memory

Running-Config File (Controls switch operation. When the switch boots, the contents of this file are erased and replaced by the contents of the startup-config file.)

Flash (Non-Volatile) Memory

Startup-Config File

(Preserves the most recently saved configuration through any subsequent reboot.)

CLI configuration changes are written to this file. To use the CLI to save the latest version of this file to the startup­ config file, you must execute the write memory command.

Menu interface configu­ ration changes are simul­ taneously written to both of these files.

Figure 6-1. Conceptual Illustration of Switch Memory Operation

6-3