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Configure DHCP on the ENSP Core Switch

You can configure DHCP on a Huawei ENSP core switch by enabling the DHCP service, creating IP address pools, assigning VLAN interfaces, and selecting either interface-based or global DHCP allocation. Step 1: Enter System View and Enable DHCPAccess the switch CLI and enter system view: CodeCopy system-view Enable the DHCP service: CodeCopy dhcp enable By default, the DHCP service is disabled, so this step is essential. Step 2: Configure VLAN InterfacesCreate VLAN interfaces (VLANIF) for each subnet: CodeCopy interface Vlanif 10[Huawei-Vlanif10] ip address 192.

168. 10. 1 24[Huawei-Vlanif10] quit interface Vlanif 20[Huawei-Vlanif20] ip address 192.

168. 20. 1 24[Huawei-Vlanif20] quit These VLAN interfaces act as gateways for the DHCP clients.

Step 3: Create DHCP Address PoolsDefine an IP address pool for each subnet: CodeCopy ip pool POOL10[Huawei-ip-pool-POOL10] network 192. 168. 10.

0 mask 255. 255. 255.

0[Huawei-ip-pool-POOL10] gateway-list 192. 168. 10.

1[Huawei-ip-pool-POOL10] dns-list 8. 8. 8.

8 114. 114. 114.

114[Huawei-ip-pool-POOL10] quit ip pool POOL20[Huawei-ip-pool-POOL20] network 192. 168. 20.

0 mask 255. 255. 255.

0[Huawei-ip-pool-POOL20] gateway-list 192. 168. 20.

1[Huawei-ip-pool-POOL20] dns-list 8. 8. 8.

8 114. 114. 114.

114[Huawei-ip-pool-POOL20] quit You can also configure lease times for each pool: CodeCopy[Huawei-ip-pool-POOL10] lease day 30[Huawei-ip-pool-POOL20] lease hour 36 This allows different lease durations for permanent and temporary users. Step 4: Bind DHCP to VLAN InterfacesChoose either interface-based or global DHCP allocation: Interface-based: The interface IP is used as the gateway. CodeCopy[Huawei-Vlanif10] dhcp select interface[Huawei-Vlanif20] dhcp select interface Global allocation: The DHCP server assigns addresses from the global pool.

CodeCopy[Huawei-Vlanif10] dhcp select global[Huawei-Vlanif20] dhcp select global Interface-based allocation is simpler for small networks, while global allocation is suitable for larger networks. Step 5: Configure Trunk Links to Access SwitchesEnsure the links connecting the core switch to access switches are configured as trunks: CodeCopy interface GigabitEthernet 0/0/1[Huawei-GigabitEthernet0/0/1] port link-type trunk[Huawei-GigabitEthernet0/0/1] port trunk allow-pass vlan 10 20[Huawei-GigabitEthernet0/0/1] quit This allows DHCP requests from clients on different VLANs to reach the core switch. Step 6: Verify DHCP ConfigurationCheck the DHCP bindings and active leases: CodeCopy display dhcp server ip-in-use display dhcp server statistics Test by connecting a client to an access switch and verifying it receives an IP address from the correct pool.

Optional: Configure DHCP RelayIf the DHCP server is not on the same subnet as the clients, enable DHCP relay on the VLAN interface: CodeCopy[Huawei-Vlanif10] dhcp relay server-ip 192. 168. 1.

1 This forwards DHCP requests to the remote server. By following these steps, your ENSP core switch will dynamically assign IP addresses, gateways, and DNS settings to clients across multiple VLANs, supporting both small and large network deployments.

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