who stores the sender information in its ARP cache. Newer information always replaces existing content
in the ARP cache.
The number of supported ARP entries is platform-dependent.
Devices can be moved in a network, which means the IP address that was at one time associated with a
certain MAC address is now found using a different MAC, or may have disappeared from the network
altogether (that is, it has been reconfigured, disconnected, or powered off). This leads to stale
information in the ARP cache unless entries are updated in reaction to new information seen on the
network, periodically refreshed to determine if an address still exists, or removed from the cache if the
entry has not been identified as a sender of an ARP packet during the course of an ageout interval,
usually specified via configuration.
The
Routing
>
ARP Table
folder contains links to the following web pages that configure and display
ARP detail:
•
on page 257
•
on page 258
ARP Create
Use the ARP Create page to add an entry to the Address Resolution Protocol table.
To display this page, click
Routing
>
ARP Table
>
Summary
in the navigation menu.
The ARP Table displays at the bottom of the page, and contains the following fields:
Use the buttons to perform the following tasks:
•
To add a static ARP entry, click
Add
. The Add Static ARP Entry dialog box opens. Specify the new
entry information in the available fields.
•
To delete one or more ARP entries, select each entry to delete and click
Remove
. Note that ARP
entries designated as Local cannot be removed.
Table 263: ARP Create Fields
Field
Description
IP Address
The IP address of a network host on a subnet attached to one of the device's
routing interfaces. When adding a static ARP entry, specify the IP address for the
entry after you click
Add
.
MAC Address
The unicast MAC address (hardware address) associated with the network host.
When adding a static ARP entry, specify the MAC address to associate with the
IP address in the entry.
Interface
The routing interface associated with the ARP entry. The network host is
associated with the device through this interface.
Configuring Routing
ExtremeSwitching 200 Series: Administration Guide
257