Figure 6-38. PXE Flow Diagram
1.As the server boots up, it starts the QLogic adapter PXE boot code from the adapter Flash memory. This boot code is part of the
2.The PXE boot code broadcasts a DHCPDISCOVER message.
3.Within the boot server or a separate entity, the DHCP server then responds by sending a DHCPOFFER message with an IP address for use by the QLogic adapter during the PXE boot process. The DHCP OFFER message also contains the boot server list.
4.PXE boot code acknowledges the DHCPOFFER message and waits for an acknowledgement from the DHCP server.
5.The PXE boot code selects a boot server and proceeds to imitate the boot server with its IP address and system architecture details.
6.The boot server responds to the PXE boot code with the boot file name (an executable file corresponding to the server architecture) and trivial file transfer protocol (TFTP) configuration settings required by the PXE boot code to download the executable boot file.
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