Configuring Enhanced Proxy ARP
Use the Enhanced Proxy ARP window for help on how to
enable enhanced proxy ARP, how to add or modify enhanced proxy ARP subnets, and how to
modify subnet interfaces.
In indirect proxy is when a router that has ARP
routing enabled and proxy-on-behalf enabled, can optionally issue ARP responses on behalf of routers that are
not running proxy ARP. When an ARP request is received and the output interface is the
same as the input interface and the next hop is a router, then the receiving router issues
an ARP response with the next hop routers MAC address in the sender hardware
address field instead of its own address.
To communicate directly over a LAN
environment using enhanced proxy ARP, you must configure hosts to ARP for all destination
addresses. For information on how to configure common operating
systems for ARP routing, click here.
Enabling Enhanced Proxy ARP
Enabling enhanced proxy ARP globally enables enhanced proxy ARP on all LAN
interfaces running IP that have not been disabled with the modify interfaces procedure.
Procedure:
Step |
Action |
1 |
From the Enhanced Proxy ARP drop-down box,
select Enabled. |
2 |
Click Apply. Enhanced proxy ARP is
enabled. |
Adding Enhanced Proxy ARP Subnets
Use this procedure to prevent enhanced proxy ARP routing
for destinations in certain subnets.
Procedure:
Step |
Action |
1 |
In the Subnets table, click Add. The
Enhanced Proxy ARP Add/Modify Subnet window appears with zeros in all fields. |
2 |
Enter an interface number in the Interface
Number field. |
3 |
Enter a subnet address in the Subnet
Address field. |
4 |
Enter a subnet mask in the Subnet Mask
field. |
5 |
Click Apply. The subnet is added to
the router's configuration. |
Modifying Enhanced Proxy ARP Subnets
Procedure:
Step |
Action |
1 |
In the Subnets table, click the Mod button
associated with the subnet you want to modify. The Enhanced Proxy ARP Add/Modify
Subnet window appears displaying the subnet you selected. |
2 |
Enter a new interface number, if
appropriate, in the Interface Number field. |
3 |
Enter a new subnet address, if appropriate,
in the Subnet Address field. |
4 |
Enter a new subnet mask, if appropriate, in
the Subnet Mask field. |
5 |
Click Apply. The subnet is modified
in the router's configuration. |
Deleting Enhanced Proxy ARP Subnets
Procedure:
Step |
Action |
1 |
In the Subnets table, click the Del button
associated with the subnet you want to delete. The subnet is deleted from the
router's configuration. |
2 |
Enter 0.0.0.0 in the Subnet Address field. |
3 |
Click Apply. The subnet is deleted
from the router's configuration. |
Modifying Enhanced Proxy ARP Interfaces
This procedure allows you to modify enhanced proxy ARP and proxy on behalf for each
interface. When enhanced proxy ARP is initially enabled, enhanced proxy ARP for each
interface is set to On and proxy on behalf is set to No.
Procedure:
Step |
Action |
1 |
In the Interfaces table, click the Mod
button associated with the interface you want to modify. The Enhanced Proxy ARP
Modify Interface window appears. |
2 |
In the Routing on Interface box, if
appropriate, select On or Off to change the state of enhanced proxy ARP. |
3 |
In the Proxy on Behalf box, if appropriate,
select No or Yes to change the state of proxy on behalf. |
4 |
Click Apply. |
Field Descriptions
Subnets |
Interface
Number |
Network number assigned to the
interface. |
Subnet
Address |
Subnet address of the
interface. |
Subnet
Mask |
Subnet mask of the interface. |
|
|
Interfaces |
Interface Number |
Network number assigned to the
interface. |
Enhanced
Proxy ARP |
Enhanced proxy ARP for an
interface is enabled or disabled. |
Proxy
On Behalf |
An indirect proxy that
indicates whether an interface is enabled or disabled. |
|