ip proxy-arp
25-14 IP Configuration
Defaults
None.
Mode
Global configuration: C3(su)->router(Config)#
Usage
The IP address specified for the static ARP entry must fall within one of the subnets or networks
defined on the routed interfaces of the system ( or stack, if applicable). The system can then match
the IP address of the static ARP entry with the appropriate routed interface and associate it with
the correct VLAN.
Refer to the Router Capacities table in the Release Notes for this product for a listing of the
number of static ARP entries supported by this product.
Example
This example shows how to add a permanent ARP entry for the IP address 130.2.3.1 and MAC
address 0003.4712.7a99:
C3(su)->router(Config)#arp 130.2.3.1 0003.4712.7a99
ip proxy-arp
Use this command to enable proxy ARP on an interface. The no form of this command disables
proxy ARP.
Syntax
ip proxy-arp
no ip proxy-arp
Parameters
None.
Defaults
Disabled.
Mode
Interface configuration: C3(su)->router(Config-if(Vlan 1))#
Usage
This variation of the ARP protocol allows the router to send an ARP response on behalf of an end
node to the requesting host. Proxy ARP can be used to resolve routing issues on end stations that
are unable to route in the subnetted environment. The Enterasys C3 will answer to ARP requests
on behalf of targeted end stations on neighboring networks. It is disabled by default.
Example
This example shows how to enable proxy ARP on VLAN 1:
C3(su)->router(Config)#interface vlan 1
C3(su)->router(Config-if(Vlan 1))#ip proxy-arp
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