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Procedure
1. Enter system view.
system-view
2. Enter interface view.
interface interface-type interface-number
3. Set the dynamic ARP learning limit for the interface.
arp max-learning-num max-number
By default, an interface can learn a maximum of 1024 dynamic ARP entries.
To disable the interface from dynamic ARP learning, set the value to 0.
Setting the aging timer for dynamic ARP entries
About the aging timer for dynamic ARP entries
Each dynamic ARP entry in the ARP table has a limited lifetime, called an aging timer. The aging
timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. A dynamic ARP
entry that is not updated before its aging timer expires is deleted from the ARP table.
Procedure
1. Enter system view.
system-view
2. Set the aging timer for dynamic ARP entries.
arp timer aging { aging-minutes | second aging-seconds }
The default setting is 20 minutes.
Enabling dynamic ARP entry check
About dynamic ARP entry check
The dynamic ARP entry check feature disables the device from supporting dynamic ARP entries that
contain multicast MAC addresses. The device cannot learn dynamic ARP entries containing
multicast MAC addresses. You cannot manually add static ARP entries containing multicast MAC
addresses.
When dynamic ARP entry check is disabled, ARP entries containing multicast MAC addresses are
supported. The device can learn dynamic ARP entries containing multicast MAC addresses obtained
from the ARP packets sourced from a unicast MAC address. You can also manually add static ARP
entries containing multicast MAC addresses.
Procedure
1. Enter system view.
system-view
2. Enable dynamic ARP entry check.
arp check enable
By default, dynamic ARP entry check is enabled.
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