5.1 Description
The DHCP or BOOTP relay agent forwards the DHCP or BOOTP packets broadcast by a DHCP or BOOTP client (abbreviated hereafter to client) to the DHCP or BOOTP server (abbreviated hereafter to server) when the server and the client exist in different subnets.
To forward a DHCP or BOOTP packet to the server, the DHCP or BOOTP relay agent inserts the server IP address set in the configuration, or the helper address, in the destination IP address of the packet. The helper address is the IP address of the router that can forward the packet to the subnet containing the server.