Configuring Gratuitous Arp - HP A7500 Series Configuration Manual

If the virtual IP address of the VRRP group is associated with a virtual MAC address, the sender MAC
address in the gratuitous ARP packet takes the virtual MAC address of the virtual router. If the virtual IP
address of the VRRP group is associated with the real MAC address of an interface, the sender MAC
address in the gratuitous ARP packet takes the MAC address of the interface on the master router in the
VRRP group.
NOTE:
For more information about VRRP, see

Configuring gratuitous ARP

Follow these steps to configure gratuitous ARP:
To do...
Enter system view
Enable learning of gratuitous ARP
packets
Enable the device to send
gratuitous ARP packets upon
receiving ARP requests from
another subnet
Enter interface view
Enable periodic sending of
gratuitous ARP packets and set the
sending interval
NOTE:
You can enable periodic sending of gratuitous ARP packets in VLAN interface view or Layer 3 Ethernet
•
port view.
You can enable periodic sending of gratuitous ARP packets on a maximum of 1024 interfaces.
•
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.
• If you change the interval for sending gratuitous ARP packets, the configuration is effective at the next
sending interval.
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 such cases.
High Availability Configuration Guide
Use the command...
system-view
gratuitous-arp-learning enable
gratuitous-arp-sending enable
interface interface-type
interface-number
arp send-gratuitous-arp [ interval
milliseconds ]
14
.
Remarks
—
Optional
Enabled by default.
Required
By default, a device does not send
gratuitous ARP packets upon
receiving ARP requests from
another subnet.
—
Required
Disabled by default.