TP-Link T1500-28PCT T1500-28PCTTL-SL2428PUN V3 User Guide - Page 723

Configuring DHCP Filter DHCPv4 Filter Configuration Step 7 Step 8 Step 9 Step 10 Step 11 ip dhcp filter decline rate value Enable the decline protect feature and specify the maximum number of Decline packets can be forwarded per second on the port. The excessive Decline packets will be discarded. value: Specify the limit rate value of Decline packets. The following options are provided: 0, 5,10,15,20,25 and 30 (packets/second). The default value is 0, which indicates disabling this feature. show ip dhcp filter Verify the global DHCPv4 Filter configuration. show ip dhcp filter interface [ fastEthernet port | gigabitEthernet port | tengigabitEthernet port | port-channel port-channel-id ] Verify the DHCPv4 Filter configuration of the port. end Return to privileged EXEC mode. copy running-config startup-config Save the settings in the configuration file. Note: The member port of an LAG (Link Aggregation Group) follows the configuration of the LAG and not its own. The configurations of the port can take effect only after it leaves the LAG. The following example shows how to enable DHCPv4 Filter globally and how to enable DHCPv4 Filter, enable the MAC verify feature, set the limit rate as 10 pps and set the decline rate as 20 pps on port 1/0/1: Switch#configure Switch(config)#ip dhcp filter Switch(config)#interface gigabitEthernet 1/0/1 Switch(config-if)#ip dhcp filter Switch(config-if)#ip dhcp filter mac-verify Switch(config-if)#ip dhcp filter limit rate 10 Switch(config-if)#ip dhcp filter decline rate 20 Switch(config-if)##show ip dhcp filter Global Status: Enable Switch(config-if)#show ip dhcp filter interface gigabitEthernet 1/0/1 User Guide 700