BOOTP Relay Agent

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Table of Contents >> Optional Protocols


Description

BOOTP and DHCP clients send out limited broadcasts messages to UDP port 67 (BOOTP server port) in order to get boot configuration from a BOOTP/DHCP server. If the server is not on the same subnet as the client, the broadcast message will not reach the server, since routers do not forward limited broadcasts. To avoid having a BOOTP/DHCP server on every subnet, BOOTP relay agents have been designed so that they can receive the limited broadcast message from the BOOTP or DHCP client, and send it (with some modifications) to a BOOTP/DHCP server. The BOOTP relay agent will also relay the replies from the BOOTP/DHCP server back to the client.


Function Calls


Table of Contents >> Optional Protocols