Auto Image and Configuration Update 337
15
Automatically Updating the Image
and Configuration
The topics covered in this chapter include:
• Auto Configuration Overview
• What Are the Dependencies for DHCP Auto Configuration?
• Default Auto Configuration Values
• Managing Auto Configuration (Web)
• Managing Auto Configuration (CLI)
• Auto Configuration Example
Auto Configuration Overview
The Auto Configuration feature can automatically update the firmware
image and obtain configuration information when the switch boots. Auto
Configuration begins the automatic download and installation process when
the switch or stack master is initialized and no configuration file (startup-
config) is found, or when the switch boots and loads a saved configuration
that has Auto Configuration enabled. Auto Configuration is enabled by
default. Allow downgrade is also enabled by default.
The Auto Configuration feature includes two components:
• USB Auto Configuration
•DHCP Auto Install
If no configuration file is found and the Auto Configuration feature is
enabled (which it is by default), the Auto Configuration process begins. If a
USB device is connected to the PowerConnect switch USB port and contains
the appropriate file, the switch uses the USB Auto Configuration feature to
update the configuration or image. If the USB Auto Configuration fails -
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