Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 2 ARP Configuration Commands
3Com Corporation
2-11
[3Com-Ethernet 1/0/0] dhcp server synchronize arp
2.4.4 dhcp server synchronize arp interface (in System View)
Syntax
dhcp server synchronize arp { interface interface-type interface-number [ to
interface-type interface-number | all }
undo dhcp server synchronize arp { interface interface-type interface-number [ to
interface-type interface-number | all }
View
System view
Parameter
interface-type interface-number [ to interface-type interface-number ]: Indicates an
interface or all interfaces from the first specified interface to the second. Note that the
interfaces must be Ethernet interfaces (or subinterfaces) or virtual Ethernet interfaces.
all: Indicates all interfaces.
Description
Use the dhcp server synchronize arp interface command to enable authorized ARP
for specified DHCP interface address pools.
Use the undo dhcp server domain-name interface command to disable authorized
ARP for specified DHCP interface address pools.
By default, authorized ARP is disabled.
After you enable authorized ARP for the specified DHCP interface address pools, the
system permits IP addresses allocated from the interface address pools to be resolved
dynamically using ARP, and allows the corresponding authorized ARP entries to be
added to the ARP table.
Note that you cannot use the display current-configuration command to verify the
configuration made by using the dhcp server synchronize arp interface command,
which is implemented by executing the dhcp server synchronize arp command
repeatedly.
Related command: dhcp server ip-pool.
Example
# Enable authorized ARP for interfaces from Ethernet2/0/0.1 to Ethernet2/0/0.5.
[3Com] dhcp server synchronize arp interface ethernet 2/0/0.1 to ethernet
2/0/0.5