Users Guide

Table Of Contents

554 DHCP and USB Auto-Configuration

CLI, this is performed by issuing a write command or copy running-config

startup-config command and should be done after validating the contents of

saved configuration.

If the downloaded configuration is not saved to the startup-config, the

configuration will be reloaded by the switch every time the DHCP lease

expires.

Stopping and Restarting the Auto Configuration Process

The Auto Configuration process can be terminated at any time before the

image or configuration file is downloaded. This is useful when the switch is

disconnected from the network. Termination of the Auto Configuration

process ends further periodic requests for a host-specific configuration file.

The Auto Configuration process automatically starts after a reboot if the

startup-config file is not found on the switch. The configuration file will not

be found if it has never been saved on the switch, or if you issue a command

to erase the configuration file (erase startup-config).

Managing Downloaded Config Files

The configuration files downloaded by Auto Configuration are stored in the

nonvolatile memory as .scr files. The files may be managed (viewed or

deleted) along with files downloaded by the configuration scripting utility.

The script files may not contain commands that are not capable of being

saved in the running configuration, for example, locate.

A file is not automatically deleted after it is downloaded. The file does not

take effect upon a reboot unless you explicitly save the configuration (the

saved configuration takes effect upon reboot). If you do not save the

configuration downloaded by the Auto Configuration feature, the Auto

Configuration process occurs again on a subsequent reboot or when the

DHCP lease expires. This may result in one of the previously downloaded files

being overwritten.

What Are the Dependencies for DHCP Auto Configuration?

The Auto Configuration process from TFTP servers depends upon the

following network services:

• A DHCP server must be configured on the network with appropriate

services.