TP-Link T2500G-10MPS T2500G-10MPSUN V1 Configuration Guide - Page 606

Configuring Network Security DHCP Snooping Configuration Decline Protect LAG 2) Click Apply. Select to enable the decline protect feature and specify the maximum number of DHCP Decline packets that can be forwarded on the port per second. The excessive DHCP Decline packets will be discarded. Displays the LAG that the port is in. 3.1.3 (Optional) Configuring Option 82 Option 82 records the location of the DHCP client. The switch can add option 82 to the DHCP request packet and then transmit the packet to the DHCP server. Administrators can check the location of the DHCP client via option 82. The DHCP server supporting Option 82 can also set the distribution policy of IP addresses and other parameters, providing a more flexible address distribution way. Choose the menu Network Security > DHCP Snooping > Option 82 Config to load the following page. Figure 3-3 Option 82 Config Follow these steps to configure Option 82: 1) Select one or more ports and configure the parameters. Option 82 Support Enable the Option 82 feature. Operation Strategy Select the operation for the Option 82 field of the DHCP request packets. Keep: Indicates keeping the Option 82 field of the packets. Replace: Indicates replacing the Option 82 field of the packets with one defined by the switch. By default, the Circuit ID is defined to be the VLAN and the number of the port which receives the DHCP Request packets. The Remote ID is defined as the MAC address of the DHCP Snooping device which receives the DHCP Request packets. Drop: Indicates discarding the packets that include the Option 82 field. Configuration Guide 579