ZyXEL GS1920 Series User Guide - Page 288

Chapter 35 DHCP Table 143 IP Application > DHCP > DHCPv4 > Global > Port (continued) LABEL Add DESCRIPTION Click this to create a new entry or to update an existing one. Cancel Clear Index Port Profile Name Delete Cancel This saves your changes to the Switch's run-time memory. The Switch loses these changes if it is turned off or loses power, so use the Save link on the top navigation panel to save your changes to the non-volatile memory when you are done configuring. Click this to reset the values above based on the last selected entry or, if not applicable, to clear the fields above. Click Clear to reset the fields to the factory defaults. This field displays a sequential number for each entry. Click an index number to change the settings. This field displays the port(s) to which the Switch applies the settings. This field displays the DHCP option 82 profile
that the Switch applies to the port(s). Select the entry(ies) that you want to remove in the Delete column, then click the Delete button to remove the selected entry(ies) from the table. Click this to clear the Delete check boxes above. 35.4.5 Global DHCP Relay Configuration Example The follow figure shows a network example where the Switch is used to relay DHCP requests for the VLAN1 and VLAN2 domains. There is only one DHCP server that services the DHCP clients in both domains. Figure 210 Global DHCP Relay Network Example DHCP Server: 192.168.1.100 VLAN1 VLAN2 Configure the DHCP Relay screen as shown. Make sure you select a DHCP option 82 profile (default1 in this example) to set the Switch to send additional information (such as the VLAN ID) together with the DHCP requests to the DHCP server. This allows the DHCP server to assign the appropriate IP address according to the VLAN ID. GS1920 Series User's Guide 288