Service Manual

– Configuration File Name — the configurations applied to the system. The configuration

filename is expected to use option 209. To configure the device by itself for a download

configuration file, you can also create a preconfiguration script in option 209.

– File Server Address — the server where the image and configurations files are placed. The

address is assumed to be a TFTP address unless it is given as a URL. The system supports the TFTP,

HTTP, HTTPS, SFTP, SCP, and FTP protocols, as well as files stored in flash.

– Domain Name Server (Optional) — the DNS server contacted to resolve the host name.

– IP Address — dynamic IP address for the system. Use this IP address for file transfers only.

The following lists the DHCP option codes.

DHCP Option

Codes

Description

6 Domain Name Server IP

60 Vendor class identifier

61 Class identifier

66 TFTP Server name

67 Boot filename

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.

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