3Com 3CRWX120695A WXR100, 3CRWXR10095A, WX4400 3CRWX440095A WX1200 manual Select IP Services

Viewing and Configuring IP Services Settings 205

Configuring ARP The Address Resolution Protocol (ARP) table maps IP addresses to MAC addresses. ARP is enabled by default on the WX and cannot be disabled. An ARP entry is added to the table in one of the following ways:

„Automatically by the WX. The WX adds a local entry for its own MAC address and adds dynamic entries for addresses learned from traffic received by the WX. When the WX receives an IP packet, the WX adds the packet’s source MAC address and source IP address to the ARP table.

„By the system administrator. Using 3WXM, you can add permanent entries to the ARP table. Permanent entries do not age out and remain in the table even after the WX is rebooted.

In addition to adding permanent ARP entries, you can set the amount of time unused dynamic entries remain in the table before they are removed.

1In the Aging Time box, specify the amount of time a dynamic entry can remain unused before the entry is removed from the ARP table.

The value range for the aging timeout is 0 to 1,000,000 seconds. The default value is 1200 seconds. To disable aging, specify 0 as the aging timeout.

The local entry for the WX, static entries, and permanent entries in the ARP table are not affected by the aging timeout.

2Access the Create ARP Entry wizard:

a Select the Configuration tool bar option.

b In the Organizer panel, click the plus sign next to the WX switch. c Click the plus sign next to System.

d Select IP Services.

e In the Task List panel, select ARP Entry.

3In the MAC Address box, type the MAC address that the IP address is to be mapped to.

4In the IP Address box, type the IP address for the ARP entry.

5Click Finish.