TP-Link T3700G-28TQ T3700G-28TQ V1 UG - Page 162
Details of DHCP Relay on T3700G-28TQ, DHCP Relay Application
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Details of DHCP Relay on T3700G-28TQ A typical application of T3700G-28TQ working at DHCP Relay function is shown below. It can be altered to meet the network requirement. Figure 10-14 DHCP Relay Application To allow all clients in different VLAN request IP address from one server successfully, the DHCP Relay function can transmit the DHCP packet between clients and server in different VLANs, and all clients in different VLANs can share one DHCP Server. When receiving DHCP-DISCOVER and DHCP-REQUEST packets, the switch will fill the giaddr field with the interface IP of the receiving port, optionally insert the option 82 information, and then forward the packet to the server. When receiving DHCP-OFFER and DHCP-REQUEST packets from the server, the switch will delete the option 82 information and forward the packet to the interface which receives the request. The process will be shown as follows. Figure 10-15 DHCP Relay Process 151