HP VPN Firewall Appliances Network Management Command Reference

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Gratuitous ARP commands
arp send-gratuitous-arp
Use arp send-gratuitous-arp to enable periodic sending of gratuitous ARP packets and set the sending
interval on an interface.
Use undo arp send-gratuitous-arp to disable the interface from periodically sending gratuitous ARP
packets.
Syntax
arp send-gratuitous-arp [ interval milliseconds ]
undo arp send-gratuitous-arp
Default
An interface is disabled from sending gratuitous ARP packets periodically.
Views
Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view, Layer 3 aggregate interface view,
Layer 3 aggregate subinterface view, VLAN interface view
Default command level
2: System level
Parameters
interval milliseconds: Sets the interval at which gratuitous ARP packets are sent, in the range of 200 to
200000 milliseconds. The default value is 2000.
Usage guidelines
This function takes effect only when the enabled interface is up and an IP address has been assigned to
the interface.
This function can send gratuitous ARP requests only for a VRRP virtual IP address, or the sending
interface's primary IP address or manually configured secondary IP address. The primary IP address can
be configured manually or automatically, whereas the secondary IP address must be configured
manually.
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 might be much lower than is expected if this function is
enabled on multiple interfaces, or each interface is configured with multiple secondary IP addresses, or
a small sending interval is configured in the preceding cases.
Examples
# Enable GigabitEthernet 0/1 to send gratuitous ARP packets every 300 milliseconds.
<Sysname> system-view
[Sysname] interface gigabitethernet 0/1
[Sysname-GigabitEthernet0/1] arp send-gratuitous-arp interval 300