Setting The Aging Timer For Dynamic Arp Entries; Enabling Dynamic Arp Entry Check - HP 5920 Series Configuration Manual

The Layer-2 interface can learn an ARP entry only when both its maximum number and the VLAN
interface's maximum number are not reached.
To set the maximum number of dynamic ARP entries that an interface can learn:
Step
1. Enter system view.
2. Enter interface view.
3. Set the maximum number of
dynamic ARP entries.

Setting the aging timer for dynamic ARP entries

Each dynamic ARP entry in the ARP table has a limited lifetime, called 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.
To set the aging timer for dynamic ARP entries:
Step
1. Enter system view.
2. Set the aging timer for dynamic ARP
entries.

Enabling dynamic ARP entry check

The dynamic ARP entry check function controls whether the device supports dynamic ARP entries
containing multicast MAC addresses.
When dynamic ARP entry check is enabled, the device cannot learn dynamic ARP entries containing
multicast MAC addresses, and you cannot manually add static ARP entries containing multicast MAC
addresses.
When dynamic ARP entry check is disabled, 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.
To enable dynamic ARP entry check:
Step
1. Enter system view.
2. Enable dynamic ARP entry check.
Command
system-view
interface interface-type
interface-number
arp max-learning-num number
Command
system-view
arp timer aging aging-time
Command
system-view
arp check enable
5
Remarks
N/A
N/A
By default, an interface can learn a
maximum of 16384 dynamic ARP
entries.
If the value of the number argument is set
to 0, the interface is disabled from
learning dynamic ARP entries.
Remarks
N/A
By default, the aging time for
dynamic ARP entries is 20 minutes.
Remarks
N/A
By default, dynamic ARP entry check is
enabled.