Configuration Procedure; Enabling Ip Conflict Notification - HP 10500 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 is 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 is the MAC address of the interface on the
master router in the VRRP group.
For more information about VRRP, see High Availability Configuration Guide.

Configuration procedure

Follow these guidelines when you configure gratuitous ARP:
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 the sending interval set
•
by the user 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 when the previous two
conditions exist.
To configure gratuitous ARP:
Step
1. Enter system view.
2. Enable learning of gratuitous ARP
packets.
3. Enable the device to send gratuitous
ARP packets upon receiving ARP
requests whose sender IP address
belongs to a different subnet.
4. Enter interface view.
5. Enable periodic sending of gratuitous
ARP packets and set the sending
interval.

Enabling IP conflict notification

NOTE:
This feature is available in Release 1203 and later versions.
If the sender IP address of a received gratuitous ARP packet is being used by the receiving device, by
default, the receiving device sends a gratuitous ARP request, and it displays an error message after it
receives an ARP reply. The receiving device repeats the default processing 5 seconds after displaying
the error message, and it stops the processing when the conflict is resolved.
Command
system-view
gratuitous-arp-learning
enable
gratuitous-arp-sending
enable
interface interface-type
interface-number
arp send-gratuitous-arp
[ interval milliseconds ]
13
Remarks
N/A
Optional.
Enabled by default.
By default, a device does not send
gratuitous ARP packets upon
receiving ARP requests whose sender
IP address belongs to a different
subnet.
N/A
By default, this feature is disabled.