Configuring Intra-VLAN Proxy ARP

Context

Users in the same VLAN cannot communicate with each other when port isolation is configured in the VLAN. Configure intra-VLAN proxy ARP on the interfaces associated with the VLAN to enable Layer 3 communication among users.

Figure 1 shows an example of a network running intra-VLAN proxy ARP. In the figure, Host_1 and Host_2 belong to the same VLAN, but port isolation is configured between IF1 and IF2 that connect the Switch to Host_1 and Host_2. Configure intra-VLAN proxy ARP on the Switch so that Host_1 and Host_2 can communicate with each other.

Figure 1 Networking diagram of intra-VLAN proxy ARP

Procedure

Run system-view
The system view is displayed.
Run interface interface-type interface-number
The interface view is displayed.
Run arp-proxy inner-sub-vlan-proxy enable
Intra-VLAN proxy ARP is enabled.

By default, intra-VLAN proxy ARP is disabled.

Verifying the Configuration

Run the display this command in the interface view to check whether intra-VLAN proxy ARP is enabled.