The arp-proxy local enable command enables local proxy Address Resolution Protocol (ARP) that allows isolated hosts in a bridge domain (BD) to communicate.
The undo arp-proxy local enable command disables local proxy ARP.
By default, local proxy ARP is disabled.
Usage Scenario
In the EVC model, a BD is a broadcast domain, and interfaces in a BD broadcast their received packets. To minimize the broadcast volume, network administrators generally run the split-horizon enable command on interfaces that do not need to communicate with each other to isolate users. However, as user services are increasing, users have a growing requirement for communication. To meet the requirement, run the arp-proxy local enable command on a VBDIF interface to enable local proxy ARP so that isolated users in a BD can communicate with each other.
Prerequisites
A VBDIF interface has been created and the VBDIF interface view is displayed using the interface vbdif command.
Precautions
After local proxy ARP is enabled, all interfaces in a BD can communicate with each other. If you want to enable only some interfaces in a BD to communicate, run the undo split-horizon enable command only on the interfaces that have the communication requirement.