Users Guide

588 DHCP and USB Auto-Configuration
What Is the DHCP Auto Configuration Process?
If the USB Auto Configuration fails or is not used, the switch can use a
DHCP server to obtain configuration information from a TFTP server.
DHCP Auto Configuration is initiated every time the switch receives an
address lease via DHCP.
DHCP Auto Configuration is accomplished in three phases:
1 Assignment or configuration of an IP address for the switch
2 Assignment of a TFTP server
3 Obtaining image, network and host configuration files for the switch from
a TFTP server
Auto Configuration is successful when an image or configuration file is
downloaded to the switch or management unit in the stack from a TFTP
server and processed.
What Files Does DHCP Auto-Configuration Use?
DHCP Auto-Configuration uses three types of files:
• Image Configuration File: This file contains a single line of ASCII text
with the path and filename of the switch firmware image located on the
TFTP server.
• Network Configuration File: This file contains one of more lines of ASCII
text with the command ip host followed by a switch IP address and a host
name on each line.
• Host Configuration File: This file contains one of more lines of ASCII CLI
configuration that are executed in Privileged Exec mode on the switch.
Each line contains a single command.
NOTE: The downloaded configuration file is not automatically saved to startup-
config. You must explicitly issue a save request (copy running-config startup-
config) in order to save the configuration. If the downloaded configuration is not
saved to the startup-config, DHCP auto configuration will be done every time the
DHCP lease expires.