Proxy Arp Overview; Enabling Proxy Arp - 3Com MSR 50 Series Configuration Manual

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Proxy ARP Overview

Enabling Proxy ARP

P ARP C
ROXY
When configuring proxy ARP, go to these sections for information you are
interested in:
"Proxy ARP Overview" on page 561
■
"Enabling Proxy ARP" on page 561
■
"Displaying and Maintaining Proxy ARP" on page 562
■
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 interfaces isolated at
Layer 2 or located on different networks.
In one of the following cases, you need to enable the local proxy ARP:
Devices connected to different isolated layer 2 ports in the same VLAN need to
■
implement layer 3 communication.
With the super VLAN function enabled, devices in different sub VLANs need to
■
implement layer 3 communication.
With the isolate-user-vlan function enabled, devices in different second VLANs
■
need to implement layer 3 communication.
Follow these steps to enable proxy ARP in VLAN interface view/Ethernet interface
view or enable local proxy ARP in VLAN interface view:
To do...
Enter system view
Enter interface view
Enable proxy ARP
Enable local proxy ARP
ONFIGURATION
Use the command...
system-view
interface interface-type
interface-number
proxy-arp enable
local-proxy-arp enable
Remarks
-
Required
Enter VLAN interface/Ethernet
interface view to enable the
proxy ARP.
Required
Disabled by default
Required
Disabled by default