TP-Link T1500-28PCT T1500-28PCTTL-SL2428PUN V3 User Guide - Page 437

Configuring DHCP Service 4 Configuration Examples Configuration Examples 4.1 Example for DHCP VLAN Relay 4.1.1 Network Requirements The administrator needs to deploy the office network for the Marketing department and the R&D department. The detailed requirements are listed below: ■■ The Marketing department and the R&D department belong to VLAN 10 and VLAN 20, respectively. Both of the VLANs have no Layer 3 gateways. ■■ Computers in the two departments need to obtain IP addresses from the same DHCP server. The network topology designed by the administrator is shown below. Figure 4-1 Network Topology for DHCP VLAN Relay DHCP Server 192.168.0.59/24 VLAN 10 Gi1/0/1 Gi1/0/2 VLAN 20 Marketing Dept. DHCP Relay Agent 192.168.0.1 R&D Dept. 4.1.2 Configuration Scheme In the given situation, the DHCP server and the computers are isolated by VLANs, so the DHCP request from the clients cannot be directly forwarded to the DHCP server. Considering that the two VLANs have no Layer 3 gateways, we recommend you to configure DHCP VLAN Relay to satisfy the requirement. The overview of the configurations are as follows: 1) Create one DHCP IP pool on the DHCP server, which is on 192.168.0.0/24 network segment. 2) Configure 802.1Q VLAN on the DHCP relay agent. Add all computers in the marketing department to VLAN 10, and add all computers in the R&D department to VLAN 20. User Guide 414