24-Port Layer 3 Switch Management Guide

IP R OUTING
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request by sending its own MAC address to the requesting node. That
node then sends traffic to the router, which in turn uses its own routing
table to forward the traffic to the remote destination.
Basic ARP Configuration
You can use the ARP General configuration menu to specify the timeout
for ARP cache entries, or to enable Proxy ARP for specific VLAN
interfaces.
Command Usage
• The aging time determines how long dynamic entries remain the cache.
If the timeout is too short, the router may tie up resources by repeating
ARP requests for addresses recently flushed from the table.
• End stations that require Proxy ARP must view the entire network as a
single network. These nodes must therefore use a smaller subnet mask
than that used by the router or other relevant network devices.
• Extensive use of Proxy ARP can degrade router performance because it
may lead to increased ARP traffic and increased search time for larger
ARP address tables.
Command Attributes
• Timeout – Sets the aging time for dynamic entries in the ARP cache.
(Range: 300 - 86400 seconds; Default: 1200 seconds or 20 minutes)
• Proxy ARP – Enables or disables Proxy ARP for specified VLAN
interfaces.
no routing,
no default
gateway
Remote
ARP Server
Proxy ARP
ARP
request