3Com Switch 4200G Configuration Guide

Gratuitous ARP Packet Learning configuration 199
Enabling the ARP Entry
Checking Function
When multiple hosts share one multicast MAC address, you can specify whether or
not to create multicast MAC address ARP entries for MAC addresses learned by
performing the operations listed in Table 169.
Gratuitous ARP Packet
Learning
configuration
Configuring Sending of
Gratuitous ARP Packets
Sending of gratuitous ARP packets is enabled as long as an S4200G series switch
operates. And no command is for this function.
Configuring the
Gratuitous ARP packet
Learning Function
Table 170 lists the operations to configure the gratuitous ARP packet learning
function.
Displaying and
Debugging ARP
After the above configuration, you can execute the display command in any view to
display the running of the ARP configuration, and to verify the effect of the
configuration.
Execute the debugging command in user view to debug ARP configuration. Execute
the reset command in user view to clear ARP mapping entries.
Table 169 Enable the ARP entry checking function
Operation Command Description
Enter system view system-view
Enable the ARP entry
checking function (that
is, disable the switch
from creating multicast
MAC address ARP
entries for MAC
addresses learned)
arp check enable Optional
By default, the ARP entry checking
function is enabled.
Table 170 Configure the gratuitous ARP packet learning function
Operation Command Description
Enter system view system-view
Enable the gratuitous
ARP packet learning
function
gratuitous-arp-learning enable Required
By default, the gratuitous ARP
packet learning function is enabled.
Table 171 Display and debug ARP
Operation Command Remark
Display specific ARP
mapping table entries
display arp [ static | dynamic |
ip-address ]
This command can be executed in
any view.
Display the ARP
mapping entries related
to a specified string in a
specified way
display arp [ dynamic | static |
ip-address ] | { begin | include |
exclude } text
This command can be executed in
any view.
Display the number of
the ARP mapping
entries of the specified
type
display arp count [ [ dynamic |
static ] | { begin | include |
exclude } text | ip-address ]
This command can be executed in
any view.
If you execute this command with
no argument specified, the number
of all types of ARP mapping entries
is displayed.