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address of the VRRP group is associated with the real MAC address of an interface, the sender MAC
address in the gratuitous ARP packet is the MAC address of the interface on the master router.
For more information about VRRP,
see VRRP Configuration
in the
High Availability Configuration
Guide
.
Configuring Gratuitous ARP
Follow these steps to configure gratuitous ARP:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enable learning of gratuitous ARP
packets
gratuitous-arp-learning enable
Optional
Enabled by default.
Enable the device to send
gratuitous ARP packets upon
receiving ARP requests from
another network segment
gratuitous-arp-sending enable
Required
By default, a device does not send
gratuitous ARP packets upon
receiving ARP requests from
another network segment.
Enter interface view
interface
interface-type
interface-number
—
Enable periodic sending of
gratuitous ARP packets and set
the sending interval
arp send-gratuitous-arp
[
interval milliseconds
]
Required
Disabled by default.
z
You can enable periodic sending of gratuitous ARP packets on a maximum of 1024 interfaces.
z
Periodic sending of gratuitous ARP packets takes effect only when the link of the enabled
interface goes up and an IP address has been assigned to the interface.
z
If you change the interval for sending gratuitous ARP packets, the configuration is effective at the
next sending interval.
z
The frequency of sending gratuitous ARP packets may be much lower than is expected if this
function is enabled on multiple interfaces, if each interface is configured with multiple secondary
IP addresses, or if a small sending interval is configured in the above cases.