3Com Switch 7750 Configuration Guide Guide

ARP Configuration 551
Introduction to ARP
Configuration Tasks
Adding a Static ARP
Mapping Entry Manually
c
CAUTION:
■ Static ARP mapping entries are valid as long as the Ethernet switch operates.
But the following operations result in ARP entries being removed:
changing/removing a VLAN interface, removing a VLAN, or removing a port
from a VLAN.
■ As for the arp static command, the value of the vlan-id argument must be the
ID of an existing VLAN, and the port identified by the interface-type and
interface-number arguments must belong to the VLAN.
Table 418 ARP entries
ARP entry Generation Method Maintenance Mode
Static ARP entry Manually configured Manual maintenance
Dynamic ARP entry Dynamically generated
ARP entries of this type age
with time. The aging period is
set by the ARP aging timer.
Table 419 Introduction to ARP configuration tasks
Configuration tasks Description Related section
Add a static ARP mapping
entry manually
Optional
“Adding a Static ARP
Mapping Entry Manually”
Configure maximum number
of ARP entries to be learnt
Optional
“Configuring Maximum
Number of ARP Entries to Be
Learnt”
Configure the ARP aging
timer for dynamic ARP entries
Optional
“Configuring the ARP Aging
Timer for Dynamic ARP
Entries”
Enable the ARP entries
checking function
Optional
“Enabling the ARP Entry
Checking Function”
Configure sending of
gratuitous ARP packets
Optional
“Configuring Sending of
Gratuitous ARP Packets”
Configure gratuitous ARP
packets learning function
Optional
“Configuring the Gratuitous
ARP packet Learning
Function”
Configure ARP proxy Optional “Configuring ARP proxy”
Configure ARP source
suppression
Optional
“Configuring ARP Source
Suppression”
Table 420 Add a static ARP mapping entry manually
Operation Command Description
Enter system view system-view -
Add a static ARP mapping
entry manually
arp static ip-address
mac-address [ vlan-id
interface-type
interface-number ]
Required
The ARP mapping table is
empty when a switch is just
started. And the address
mapping entries are created
by ARP.