Administrator Guide

DHCP Option

Codes

Description

150 TFTP server IP address

209 Configuration file

230 User port stacking

NOTE: BMP eventually exits when a timeout occurs.

In the following scenarios, BMP requests a different DHCP offer.

• If the offer contains only a boot image that cannot be downloaded, BMP requests another DHCP

offer.

• If you enable the reload-type config-scr-download enable command and the configuration

file in the offer cannot be downloaded, BMP requests another DHCP offer.

DHCP Server IP Blacklist

If the process does not complete successfully, the DHCP server IP is blacklisted and the BMP process re-

initiates.

A DHCP server IP is maintained in the blacklist for 10 minutes. If a DHCP offer is received from the

blacklisted DHCP server, the offer is rejected until the IP is alive in the blacklist (10 minutes).

MAC-Based Configuration

To configure the DHCP server to assign a fixed IP address, Dell Networking OS image, and configuration

file based on the system’s MAC address, use BMP mode.

Using BMP, the same IP address is assigned to the system even on repetitive reloads and the same

configuration file is retrieved when using the DNS server or the network-config file to determine the

hostname.

The assigned IP address is only used to retrieve the files from the file server. It is discarded after the files

are retrieved.

Following is a configuration example of a DHCP server included on the most popular Linux distribution.

The dhcpd.conf file shows that the MAC-based IP and configuration file assignment are fixed.

option configfile code 209=text;

option bootfile-name code 67=text;

host HOST1{

#####MAC to IP mapping

hardware ethernet 00:01:e8:8c:4d:0e;

fixed-address 30.0.0.20;

FTP URL with IP address

HTTP URL with DNS

TFTP

#####bootfile-name could be given in the following way

option bootfile-name “ftp://

admin:admin@Guest-1/Dell-SE-8.3.10.1.bin”;

Bare Metal Provisioning