Using The Cli; Configuring The Basic Dhcpv4 Filter Parameters - TP-Link Jetstream T1500G-8T User Manual

Configuring DHCP Filter
Follow these steps to add a legal DHCPv4 server:
1) Configure the following parameters:
Server IP Address
Client MAC
Address
Server Port
2) Click Create.
2.2

Using the CLI

2.2.1 Configuring the Basic DHCPv4 Filter Parameters

Follow these steps to complete the basic settings of DHCPv4 Filter:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
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Specify the IP address of the legal DHCPv4 server.
(Optional) Specify the MAC address of the DHCP Client. You can also keep this
field empty, which represents for all DHCP clients.
Select the port that the legal DHCPv4 server is connected.
configure
Enter global configuration mode.
ip dhcp filter
Enable DHCPv4 Filter globally.
interface { fastEthernet port | range fastEthernet port-list | gigabitEthernet port | range
gigabitEthernet port-list | ten-gigabitEthernet port | range ten-gigabitEthernet port-list |
interface port-channel port-channel-id | interface range port-channel port-channel-id-list
}
Enter interface configuration mode.
ip dhcp filter
Enable DHCPv4 Filter on the port.
ip dhcp filter mac-verify
Enable the MAC Verify feature. There are two fields in the DHCP packet that contain the
MAC address of the host. The MAC Verify feature compares the two fields of a DHCP
packet and discards the packet if the two fields are different. This prevents the IP address
resource on the DHCP server from being exhausted by forged MAC addresses.
ip dhcp filter limit rate value
Enable the limit rate feature and specify the maximum number of DHCP messages that can
be forwarded on the port per second. The excessive DHCP packets will be discarded.
value: Specify the limit rate value. The following options are provided: 0, 5,10,15,20,25 and
30 (packets/second). The default value is 0, which indicates disabling limit rate.
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DHCPv4 Filter Configuration
User Guide 699