The reset arp interface command clears Address Resolution Protocol (ARP) entries for an interface.
| Parameter | Description | Value |
|---|---|---|
| ip ip-address |
Clears dynamic ARP entries containing a specified IP address. |
It is in dotted decimal notation. |
| interface interface-name |
Clears dynamic ARP entries learned by the interface with a specified name. |
- |
| interface interface-type interface-number |
Clears all dynamic ARP entries learned by a specified interface. |
- |
Usage Scenario
If an unauthorized user sends a large number of ARP messages to a device, the device learns a large number of ARP entries in a short period of time, causing a buffer overflow. As a result, users may fail to access the network. To resolve the problem, run the reset arp command to delete invalid ARP entries so that new ARP entries can be created to allow authorized user access.
Prerequisites
ARP entries exist on a device.
The interface specified by interface ifName exists if this parameter is configured.Configuration Impact
After an ARP entry is cleared, the mapping between the IP and MAC addresses in the entry is cleared. As a result, users may fail to access the network, and services may be interrupted.