Configuring Proxy Arp (Cli Procedure) - Juniper JUNOS OS 10.3 - SOFTWARE Manual

Configuring Proxy ARP (CLI Procedure)

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Copyright © 2010, Juniper Networks, Inc.
You can configure proxy Address Resolution Protocol (ARP) on your EX Series switch to
enable the switch to respond to ARP queries for network addresses by offering its own
media access control (MAC) address. With proxy ARP enabled, the switch captures and
routes traffic to the intended destination.
To configure proxy ARP on a single interface:
[edit interfaces]
user@switch# set ge-0/0/3 unit 0 proxy-arp restricted
BEST PRACTICE: We recommend that you configure proxy ARP in restricted
mode. In restricted mode, the switch is not a proxy if the source and target
IP addresses are on the same subnet. If you use unrestricted mode, disable
gratuitous ARP requests on the interface to avoid the situation of the switch's
response to a gratuitous ARP request appearing to the host to be an indication
of an IP conflict:
To configure proxy ARP on a routed VLAN interface (RVI):
[edit interfaces]
user@switch# set vlan unit 100 proxy-arp restricted
Example: Configuring Proxy ARP on an EX Series Switch on page 2901
Verifying That Proxy ARP Is Working Correctly on page 1406
Configuring Routed VLAN Interfaces (CLI Procedure) on page 1379
Chapter 59: Configuring Bridging and VLANs
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