The reset arp dynamic ip command clears the dynamic Address Resolution Protocol (ARP) entries containing a specified IP address in an ARP table.
| Parameter | Description | Value |
|---|---|---|
| ipAddrValue |
Clears dynamic ARP entries containing a specified IP address learned on a specified interface. This parameter can be configured if you only want to delete one of the several ARP entries learned on a specified interface. |
The value is in dotted decimal notation. |
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.
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.