Configuration example
Network requirements
As shown in Figure 140, Host B launches gateway spoofing attacks to Device B. As a result, traffic that Device B intends to send to Device A is sent to Host B.
Configure Device B to block such attacks.
Figure 139: Network diagram
Configuration procedure
# Configure ARP gateway protection on Device B.
<DeviceB> system-view [DeviceB] interface gigabitethernet 1/0/1 [DeviceB-GigabitEthernet1/0/1] arp filter source 10.1.1.1 [DeviceB-GigabitEthernet1/0/1] quit [DeviceB] interface gigabitethernet 1/0/2 [DeviceB-GigabitEthernet1/0/2] arp filter source 10.1.1.1
Verifying the configuration
# Verify that GigabitEthernet 1/0/1 and GigabitEthernet 1/0/2 discard the incoming ARP packets whose sender IP address is the IP address of the gateway.