Enabling Learning Gratuitous ARP

Learning gratuitous ARP enables RUCKUS Layer 3 devices to learn ARP entries from incoming gratuitous ARP request packets from the hosts which are directly connected. This helps to achieve faster convergence for the hosts when they are ready to send traffic.

A new ARP entry is created when a gratuitous ARP request packet is received. If the ARP entry already exists, it is updated with the new content.

Note: The clear arp command can be used to clear the learned ARP entries. Remember that the static ARP entries are not removed.

Note: Layer 3 devices learn only from Gratuitous ARP Request packets. They do not learn from Gratuitous ARP Reply packets.

Use the show run command to see whether ARP is enabled or disabled.
```
device# show run
```

Enter the global configuration mode.
```
device# configure terminal
```

Enable learning gratuitous ARP.

device(config)# ip arp learn-gratuitous-arp

Use the show run command to see the newly learned ARP entries.
```
device# show arp
```

RUCKUS FastIron Layer 3 Routing Configuration Guide, 10.0.10 53-1005772-08

Enabling Learning Gratuitous ARP