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Configuration Guide - IP Service

CloudEngine 12800 and 12800E V200R005C00

This document describes the configurations of IP Service, including IP address, ARP, DHCP, DNS, IP performance optimization, IPv6, DHCPv6, and IPv6 DNS.
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Configuring Inter-VLAN Proxy ARP

Configuring Inter-VLAN Proxy ARP


If hosts on the same network segment of the same physical network but in different VLANs need to communicate at Layer 3, you need to enable inter-VLAN proxy ARP on the corresponding VLANIF interfaces.

As shown in Figure 2-11, Host A and Host B on the same network segment are connected to the Switch, Host A belongs to VLAN 3, and Host B belongs to VLAN 2. Host A and Host B belong to different sub-VLANs, so they cannot communicate at Layer 2.
Figure 2-11 Inter-VLAN proxy ARP implementation

You can enable inter-VLAN proxy ARP on VLANIF 4 of the Switch to solve this problem.


  1. Run system-view

    Enter the system view.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run arp proxy inter-vlan enable

    Inter-VLAN proxy ARP is enabled.

    By default, inter-VLAN proxy ARP is disabled.

  4. Run commit

    The configuration is committed.

Updated: 2019-04-18

Document ID: EDOC1100039535

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