HP 7000 dl Router manual By default, proxy-arp is enabled

SROS Command Line Interface Reference Guide PPP Interface Configuration Command Set

ip proxy-arp

Use the ip proxy-arpto enable proxy Address Resolution Protocol (ARP) on the interface. Use the no form of this command to disable this feature.

Syntax Description

<address>	Defines the IP address for the interface in dotted decimal notation (for example:
	192.22.73.101)
<subnet mask>	Specifies the subnet mask that corresponds to the listed IP address

Default Values

By default, proxy-arp is enabled.

Command Modes

(config-interface)#	Interface Configuration Mode required (applies to all physical interfaces as well as
	virtual interfaces)

Functional Notes

In general, the principle of proxy-arp allows a router to insert its IP address in the source IP address field of a packet (if the packet is from a host on one of its subnetworks). This allows hosts to reach devices on other subnetworks without implementing routing or specifying a default gateway.

If proxy-arp is enabled, the Secure Router OS will respond to all proxy-arp requests with its specified MAC address and forward packets accordingly.

Enabling proxy-arp on an interface may introduce unnecessary ARP traffic on the network.

Usage Examples

The following enables proxy-arp on the virtual PPP interface:

(config)#interface ppp 1

(config-ppp 1)#ip proxy-arp

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