Operation Manual – DHCPH3C S7500 Series Ethernet Switches Chapter 3 DHCP Relay Agent Configuration3-1Chapter 3 DHCP Relay Agent ConfigurationWhen configuring DHCP relay agents, go to these sections for information you areinterested in:z Introduction to DHCP Relay Agentz Configuring DHCP Relay Agentz Displaying and Maintaining DHCP Relay Agentz DHCP Relay Agent Configuration Examplez Troubleshooting DHCP Relay Agent3.1 Introduction to DHCP Relay Agent3.1.1 Usage of DHCP Relay AgentSince the packets are broadcasted in the process of obtaining IP addresses, DHCP isonly applicable to the situation that DHCP clients and DHCP servers are in the samenetwork segment, that is, you need to deploy at least one DHCP server for eachnetwork segment, which is far from economical.The DHCP relay agent is designed to address this problem. It enables DHCP clientsin a subnet to communicate with the DHCP server in another subnet so that the DHCPclients can obtain IP addresses. In this case, the DHCP clients in multiple networkscan use the same DHCP server, which can decrease your cost and provide acentralized administration.3.1.2 DHCP Relay Agent FundamentalsFigure 3-1 illustrates a typical DHCP relay agent application.DHCP servertDHCP relay agenDHCP client DHCP clientDHCP clientDHCP clientIP networkIP networkDHCP servertDHCP relay agenDHCP client DHCP clientDHCP clientDHCP clientIP networkIP networknFigure 3-1 Typical DHCP relay agent applicatio
