Configuration Guide                                                                            Configuring ARP 
 
 
Interface configuration mode 
If a network interface of a device acts as the gateway for downstream devices but a downstream device 
pretends to be the gateway, enable gratuitous ARP on the interface to advertise itself as the real gateway. 
Configuration 
Example 
For the network topology, see Figure 2-1. 
Configure the GigabitEthernet 0/0 interface to send a gratuitous ARP packet every 5 seconds. 
Ruijie(config-if-GigabitEthernet 0/0)#arp gratuitous-send interval 5 
Run the show running-config interface command to check whether the configuration takes effect. 
Ruijie#sh running-config interface gigabitEthernet 0/0 
 
Building configuration... 
Current configuration : 127 bytes 
! 
interface GigabitEthernet 0/0 
 duplex auto 
 speed auto 
 ip address 30.1.1.1 255.255.255.0 
 arp gratuitous-send interval 5 
2.4.4  Enabling Proxy ARP 
Configuration Effect 
The device acts as a proxy to reply to ARP request packets from other users. 
Notes 
By default, Proxy ARP is disabled. 
Configuration Steps 
  Optional.   
  If a user without any route information needs to obtain the MAC addresses of the IP users in other subnets, enable 
Proxy ARP on the device so that the device can act as a proxy to send ARP replies. 
  Enable Proxy ARP in interface configuration mode. 
Verification 
Run the show ip interface <name> command to check whether the configuration takes effect.