Reference Guide

258 | Bare Metal Provisioning 2.0
www.dell.com | support.dell.com
DHCP Retry Mechanism
BMP will request a different DHCP offer in the following scenarios:
• If you enter the
reload-type jump-start config-download enable command, the DHCP offer specifies
both the boot image and the configuration file.
• If either the image or the configuration download is successful, BMP does not request another
DHCP offer.
• If the image download is successful but the configuration download fails, the switch boots up with
the default configuration.
• If the image download fails, the switch does not try to download the configuration file and starts
sending requests for a new DHCP offer from a different server. The previously offered server is
blacklisted.
• If the offer contains only a boot image that cannot be downloaded, BMP requests another DHCP offer.
• If you enter the
reload-type config-download command and the configuration file in the offer cannot be
downloaded, the switch boots up and loads the startup configuration stored in local flash memory.
DHCP Server IP Blacklist :
If the process does not complete successfully, the DHCP server IP will be blacklisted and the DHCP
process will be re-initiated. A DHCP server is maintained in the blacklist for ten minutes. If a DHCP offer
is received from the blacklisted DHCP server, the offer will be rejected.
File Server
Set up a file server and ensure connectivity.
The server that holds the boot and configuration files must be configured as the network source for the
switch. The switch recognizes HTTP, TFTP, FTP, and Flash URLs.
For example:
• tftp://serverip/filename
• tftp://hostname/filename
• ftp://user:passwd@serverip//mypath/filename
• ftp://user:passwd@hostname//mypath/filename
• http://serverip/filename
• http://hostname/filename
• flash://filename
• filename (Assumes TFTP)
When loading the Dell Networking OS image, if the Dell Networking OS image on the server is different
from the image on the local flash, the switch downloads the image from the server onto the local flash and
reloads using that image.
Next, the switch tries to load the configuration file. If the configuration file is not specified or if the
config-download parameter is disabled, the switch loads the startup-config from the local flash.