The reset arp vpn-instance command clears the Address Resolution Protocol (ARP) entries of a VPN instance.
| Parameter | Description | Value |
|---|---|---|
| vpn-instance-name |
Clears ARP entries learned in a specified VPN instance. |
The value is a string of 1 to 31 case-sensitive characters, spaces not supported. In addition, the VPN instance name must not be _public_. When double quotation marks are used around the string, spaces are allowed in the string. |
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
Before running the reset arp command, ensure that the corresponding ARP entries exist on the 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.