Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 2 ARP Configuration Commands
3Com Corporation
2-9
Parameter
None
Description
Use the arp security command to disable dynamic ARP learning on an Ethernet
interface.
Use the undo arp security command to restore dynamic ARP learning on an Ethernet
interface.
The commands for disabling/enabling dynamic ARP learning are configured on an
interface; all other interfaces are not affected.
If you disable dynamic ARP learning and then enable the function again, the authorized
ARP entries left in the ARP table are not affected; each of the left entries continues with
its own aging process.
By default, dynamic ARP learning is enabled on an Ethernet interface.
Example
# Disable dynamic ARP learning on Ethernet interface Ethernet1/0/0.
[3Com-Ethernet1/0/0] arp security
2.4.2 arp security time-out
Syntax
arp security time-out seconds
undo arp security time-out
View
Ethernet interface view
Parameter
seconds: Aging time of the authorized ARP entries in seconds. It ranges from 30 to
86,400 and defaults to 90.
Description
Use the arp security time-out command to configure the aging time of the authorized
ARP entries.
Use the undo arp security time-out command to restore the default aging time of the
authorized ARP entries.
This command takes effect only when you have configured the arp security command.