Configuration example
Network requirements
As shown in Figure 123, Host B launches gateway spoofing attacks to Switch B. As a result, traffic that Switch B intends to send to Switch A is sent to Host B.
Configure Switch B to block such attacks.
Figure 123: Network diagram
Configuration procedure
# Configure ARP gateway protection on Switch B.
<SwitchB> system-view [SwitchB] interface gigabitethernet 1/0/1 [SwitchB-GigabitEthernet1/0/1] arp filter source 10.1.1.1 [SwitchB-GigabitEthernet1/0/1] quit [SwitchB] interface gigabitethernet 1/0/2 [SwitchB-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.