H3C Technologies H3C S3600 Series Switches - Manual (Page 600)

1-6
To do… Use the command… Remarks
Enable the gratuitous ARP
packet learning function gratuitous-arp-learning
enable Optional
Enabled by default.
Enable the master switch of a
VRRP backup group to send
gratuitous ARP packets
periodically
arp send-gratuitous enable
vrrp Optional
Enabled by default.
Enter VLAN interface view
interface Vlan-interface
vlan-id
—
Enable the VLAN interface to
send gratuitous ARP packets
periodically
gratuitous-arp
period-resending enable Optional
Enabled by default.
The sending of gratuitous ARP packets is enabled as long as an S3600 switch operates. No command
is needed for enabling this function. That is, the device sends gratuitous ARP packets whenever a
VLAN interface is enabled (such as when a link is enabled or an IP address is configured for the VLAN
interface) or whenever the IP address of a VLAN interface is changed.
Displaying and Debugging ARP
To do… Use the command… Remarks
Display specific ARP mapping
table entries display arp [ static | dynamic |
ip-address ]
Display the ARP mapping
entries related to a specified
string in a specified way display arp [ dynamic |
static ] | { begin | include |
exclude } regular-expression
Display the number of the ARP
entries of a specified type
display arp count [ [ dynamic
| static ] [ | { begin | include |
exclude } regular-expression ] |
ip-address ]
Display the statistics about the
untrusted ARP packets
dropped by the specified port display arp detection
statistics interface
interface-type interface-number
Display the setting of the ARP
aging timer
display arp timer aging
Available in any view
Clear specific ARP entries
reset arp [ dynamic | static |
interface interface-type
interface-number ]
Available in user view
ARP Configuration Examples
Network requirements
z Disable ARP entry check on the switch.