H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – ARP
H3C S7500 Series Ethernet Switches Chapter 1 ARP Configuration Commands
1-16
Description
Use the display arp timer aging command to display the setting for ARP aging timer.
Related commands: arp timer aging.
Examples
# Display the setting for ARP aging timer.
<H3C> display arp timer aging
Current ARP aging time is 20 minute(s)(default)
The above information shows that the time for ARP aging timer is 20 minutes.
1.1.22 gratuitous-arp-learning enable
Syntax
gratuitous-arp-learning enable
undo gratuitous-arp-learning enable
View
System view
Parameters
None
Description
Use the gratuitous-arp-learning enable command to enable gratuitous ARP learning.
Use the undo gratuitous-arp-learning enable command to disable gratuitous ARP
learning.
By default, gratuitous ARP learning is disabled.
With gratuitous ARP learning enabled, a switch operates as follows when receiving a
gratuitous ARP packet:
If an ARP entry in the cache matches the packet, the switch updates the ARP entry
using the sender hardware address carried in the gratuitous ARP packet.
If no ARP entry in the cache matches the packet, an ARP entry corresponding to the
packet is added to the cache.
Examples
# Enable gratuitous ARP learning on the switch.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] gratuitous-arp-learning enable