Configuration Guide Configuring NAT
Global configuration mode
Configuring the Interval at Which NAT Sends Gratuitous ARP Packets
ip nat keepalive [ keealive_out ]
keealive_out: the interval at which gratuitous ARP packets are sent from the local address of NAT.
Global configuration mode
Configuration
Example
Implementing the Sending of Gratuitous ARP Packets regularly
Configure ip nat inside on the inside interface.
Configure ip nat outside on the outside interface.
Configure a dynamic NAT rule.
Configure the periodical sending of gratuitous ARP packets.
A#configure terminal
A(config)# interface GigabitEthernet 0/0
A(config-if-GigabitEthernet 0/0)# ip address 192.168.1.1 255.255.255.0
A(config-if-GigabitEthernet 0/0)# ip nat inside
A(config-if-GigabitEthernet 0/0)# exit
A(config)# interface GigabitEthernet 0/1
A(config-if-GigabitEthernet 0/1)# ip address 200.168.12.1 255.255.255.0
A(config-if-GigabitEthernet 0/1)# ip nat outside
A(config-if-GigabitEthernet 0/1.)# exit
A(config)# ip nat pool net200 200.168.12.2 200.168.12.10 netmask 255.255.255.0