Operation Manual – ARP
H3C S3610&S5510 Series Ethernet Switches
Chapter 2 Proxy ARP Configuration
2-1
Chapter 2 Proxy ARP Configuration
When configuring proxy ARP, go to these sections for information you are interested in:
z
z
z
Displaying and Maintaining Proxy ARP
2.1 Proxy ARP Overview
For an ARP request of a host on a network to be forwarded to an interface that is on the
same network but isolated at Layer 2 or a host on another network, the device
connecting the two physical or virtual networks must be able to respond to the request.
This is achieved by proxy ARP.
Proxy ARP implements Layer 3 communication between VLAN interfaces isolated at
Layer 2 or located on different networks.
In one of the following cases, you need to enable the local proxy ARP:
z
Devices connected to different isolated layer 2 ports in the same VLAN need to
implement layer 3 communication.
z
With the isolate-user-vlan function enabled on a device attached to an switch,
devices in different second VLANs need to implement Layer 3 communication.
2.2 Enabling Proxy ARP
Follow these steps to enable proxy ARP or enable local proxy ARP in VLAN interface
view:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter VLAN interface view
interface Vlan-interface
vlan-id
Required
Enable proxy ARP
proxy-arp enable
Required
Disabled by default.
Enable local proxy ARP
local-proxy-arp
enable
Required
Disabled by default.
