Administrator Guide

16 : BIOS vs. UEFI | Doc ID 20444677 | June 2018
The principle for HTTP boot is similar to PXE boot, except that HTTP boot uses HTTP (rather than TFTP) to
transfer the NBP.
4.4.1 HTTP Boot Client Configuration
As with other system settings, the HTTP boot client configuration settings are accessible through integrated
Dell Remote Access Controller (iDRAC) interfaces such as RACADM, or locally through the System Setup
utility.
As shown in Figure 6, the UEFI HTTP Boot configuration page is found under System Setup > System BIOS
> Network Settings > HTTP Device Settings. The settings are similar to PXE settings with the addition of the
“URI” setting, which specifies the location of the bootstrap program. The URI must use the HTTP protocol,
and must specify the name of the bootstrap program (for example, http://mydomain.org/img/bootimage.efi).
NOTE: If the “URI” setting is blank, the system will try to obtain the URI from the DHCP server (Option 67 -
Bootfile_Name for DHCPv4; Option 59 - Bootfile_Url for DHCPv6).
HTTP Boot is supported only in UEFI boot mode. Also, the “Network Settings” option in the System BIOS
page is available only in UEFI boot mode.
Figure 6 UEFI PXE boot Configuration.