Setting the maximum number of dynamic ARP entries for an interface
An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When the maximum number is reached, the interface stops learning ARP entries.
You can set limits for both a Layer 2 interface and the VLAN interface for a permitted VLAN on the Layer 2 interface. The Layer 2 interface learns an ARP entry only when neither limit is reached.
The total number of dynamic ARP entries that all interfaces learn will not be larger than the maximum number of dynamic ARP entries set for the device.
To set the maximum number of dynamic ARP entries for an interface:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Enter interface view. | interface interface-type interface-number | N/A |
3. Set the maximum number of dynamic ARP entries for the interface. | arp max-learning-num max-number | By default, the maximum number of dynamic ARP entries that an interface can learn is 8192. To disable the interface from learning dynamic ARP entries, set the number to 0. |