Method to configure an S series switch as the DHCP server for voice terminal access

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For details about the configuration of the DHCP server to provide voice terminal access when the S series switch functions as the DHCP serve

Other related questions:
How to connect voice terminals to S series switch functioning as a DHCP server
For details on how to connect voice terminals to an S series switch (except S1700 switches) that functions as a DHCP server, see the section "Example for Configuring a DHCP Server on the Switch to Provide VoIP Access" in Typical IP Voice&IPTV&VOD Configuration of Typical Configuration Examples.

Method to configure DHCP server on S series switches
For S series switches excluding the S1700, the switch can function as the DHCP server to assign IP addresses to DHCP clients. Two configuration modes are available: - Interface address pool: This mode is simple. It only applies to scenario where the DHCP server and DHCP client are located on the same network segment, that is, there is no need to deploy the DHCP relay agent. - Global address pool: It applies to the scenario where the DHCP server and DHCP client are located on different segments, that is, the DHCP relay agent needs to be deployed. It also applies to the scenario where the DHCP server and DHCP client are located on the same network segment and IP addresses to be assigned to clients on multiple interfaces.

Method to configure DHCP on S series switches
For S series switches excluding the S1700, the switch can both function as the DHCP server to assign IP addresses to clients and function as a DHCP client to dynamically obtain an IP address from the DHCP server. When the DHCP client and DHCP server are located on different network segments, the switch can also function as the DHCP relay agent to assist DHCP server in allocating IP addresses to clients. In addition, the switch can be configured with DHCP snooping to defend against DHCP attacks.

Method to configure the DHCP relay on S series switches
For S series switches excluding the S1700, when the DHCP client and the DHCP server are located on different network segments, configure a DHCP relay agent to assist the DHCP server in allocating IP addresses to DHCP clients. There is no difference of the DHCP relay configuration between all versions and models of Huawei S series switches.

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