HPE 5920 series

13
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 takes effect at the
next sending interval.
The frequency of sending gratuitous ARP packets might be much lower than expected when any of
the following conditions exist:
•
This function is enabled on multiple interfaces.
•
Each interface is configured with multiple secondary IP addresses.
•
A small sending interval is configured in the preceding cases.
Examples
# Enable VLAN-interface 2 to send gratuitous ARP packets every 300 milliseconds.
<Sysname> system-view
[Sysname] interface vlan-interface 2
[Sysname-Vlan-interface2] arp send-gratuitous-arp interval 300
gratuitous-arp-learning enable
Use gratuitous-arp-learning enable to enable learning of gratuitous ARP packets.
Use undo gratuitous-arp-learning enable to disable learning of gratuitous ARP packets.
Syntax
gratuitous-arp-learning enable
undo gratuitous-arp-learning enable
Default
Learning of gratuitous ARP packets is enabled.
Views
System view
Predefined user roles
network-admin
Usage guidelines
The learning of gratuitous ARP packets function allows a device to maintain its ARP table by creating
or updating ARP entries based on received gratuitous ARP packets.
When this function is disabled, the device uses received gratuitous ARP packets to update existing
ARP entries only. ARP entries are not created based on the received gratuitous ARP packets, which
saves ARP table space.
Examples
# Enable learning of gratuitous ARP packets.
<Sysname> system-view
[Sysname] gratuitous-arp-learning enable