Brocade FastIron Ethernet Switch Layer 3 Routing Configuration Guide - Manual (Page 98)

DHCP Client-Based Auto-Configuration and Flash image update
NOTE
The DHCP Client-Based Auto-Configuration and Flash image update are platform independent and
have no differences in behavior or configuration across all platforms (FSX, FCX, and ICX).
DHCP Client-Based Auto-Configuration allows Layer 2 and Layer 3 devices to automatically obtain
leased IP addresses through a DHCP server, negotiate address lease renewal, and obtain flash image
and configuration files.
DHCP Client-Based Auto-Configuration occurs as follows.
1. The IP address validation and lease negotiation enables the DHCP client (a Brocade Layer 2 or
Layer 3 device) to automatically obtain and configure an IP address, as follows:
• ‐ One lease is granted for each Layer 2 device. if the device is configured with a static IP
address, the DHCP Auto-Configuration feature is automatically disabled.
‐ For a Layer 3 device, one leased address is granted (per device) to the interface that
first receives a response from the DHCP server.
2. If auto update is enabled, the TFTP flash image is downloaded and updated. The device compares
the filename of the requested flash image with the image stored in flash. If the filenames are
different, then the device will download the new image from a TFTP server, write the downloaded
image to flash, then reload the device or stack.
3. In the final step, TFTP configuration download and update, the device downloads a configuration
file from a TFTP server and saves it as the running configuration.
DHCP Client-Based Auto-Configuration and Flash image update
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