CONFIGURING THE DHCP RELAY AGENT
A DHCP relay agent acts on behalf of a DHCP server on a local network. It can receive queries from the DHCP clients and forward these to a real DHCP server. Figure 5.20 shows one of the possible arrangements for installing a DHCP relay service. In this case, the DHCP client and DHCP server are on different networks. The broadcast DHCPDISCOVER message usually does not go through to the DHCP server in general cases because broadcast messages are not forwarded across routers. However, the DHCP relay can forward this message to the DHCP server and can act as a bridge between the client and the server.
Figure 5.20. Operation of the DHCP relay.
The dhcpconfig utility can be used to configure the DHCP relay by selecting ...
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