Gratuitous Arp Packet Learning Configuration - 3Com 5500-SI Configuration Manual

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HAPTER ETWORK
Gratuitous ARP Packet
Learning Configuration
P O
ROTOCOL PERATION
By sending gratuitous ARP packets, a network device can:
Determine whether or not IP address conflicts exist between it and other network
■
devices.
Trigger other network devices to update its hardware address stored in their
■
caches.
When the gratuitous ARP packet learning function is enabled on a device and the
device receives a gratuitous ARP packet, the device updates the corresponding ARP
entry (if available in the cache of the switch) using the hardware address of the sender
carried in the gratuitous ARP packet. A device operates like this whenever it receives a
gratuitous ARP packet.
This section contains configuration information on Gratuitous ARP Packet Learning.
Configuring Gratuitous ARP Packet Sending
Gratuitous ARP packet sending is enabled as long as a Switch 5500 operates. And no
command is for this function.
Configuring the Gratuitous ARP Packet Learning
Table 272 describes the procedure to configure the gratuitous ARP packet learning
function.
Table 272 Configure the gratuitous ARP packet learning function
Operation
Enter system view
Enable the gratuitous ARP
packet learning function
Displaying and Debugging ARP
After the above configuration, enter the
running of the ARP configuration, and to verify the effect of the configuration. Enter
the command in User View to debug ARP configuration. Enter the
debugging
command in User View to clear ARP mapping table.
Table 273 Displaying and Debugging ARP
Operation
Display the ARP mapping table
Display the current setting of the
dynamic ARP map aging timer
Reset the ARP mapping table
Enable ARP information debugging
Disable ARP information debugging
Command Description
system-view -
gratuitous-arp-learni Required
ng enable By default, the gratuitous ARP packet
learning function is enabled.
display
Command
display arp [ ip_address | [ dynamic | static ] [
| { begin | include | exclude } text ] ]
display arp timer aging
reset arp [ dynamic | static | interface {
interface_type interface_num |
interface_name } ]
debugging arp packet
undo debugging arp packet
command in any view to display the
reset