The PXE Client responds to the DHCP Offer with a DHCP Request, where it officially requests the IP configuration information from the regular DHCP server.The proxyDHCP server provides the next-server-name and boot file name values, which is used by the client during the upcoming TFTP transaction. It leaves the IP address assigning to the regular DHCP server. Because the client identified itself as a PXEClient, the proxyDHCP server also responds with a DHCP Offer with additional information, but not IP address info.A regular DHCP server responds with a DHCP Offer, which contains possible values for network settings requested by the client.Usually a possible IP address, subnet mask, router (gateway) address, dns domain name, etc.When a PXE client boots up, it sends a DHCP Discover broadcast on the network, which includes a list of information the client would like from the DHCP server, and some information identifying itself as a PXE capable device.ProxyDHCP is a solution for those of you who are working with an unmodifiable DHCP server or wish to avoid the hassle of editing the already existing DHCP server, or even as a portable imaging solution. It leaves the role of assigning IP addresses to the other DHCP servers, but provides the necessary information so the client can PXE boot.
What a proxyDHCP service does is listen to DHCP requests and respond to clients identifying themselves as PXE Clients. This combines FOG with a proxyDHCP server. 7 Serving ProxyDHCP to multiple subnets.
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