R3303-HP HSR6800 Routers Layer 3 - IP Services Configuration Guide

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A 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 Command Remarks
1. Enter system view.
system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Set the maximum number of dynamic
ARP entries that the interface can
learn.
arp max-learning-num
number
Optional.
By default, a Layer 2 interface does
not limit the number of dynamic ARP
entries. A Layer 3 interface can learn
a maximum of 1024 dynamic ARP
entries.
If the value of the number argument is
set to 0, the interface is disabled from
learning 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. Dynamic ARP entries that are not
updated before their aging timers expire are deleted from the ARP table.
To set the aging timer for dynamic ARP entries:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Set the aging timer for
dynamic ARP entries.
arp timer aging aging-time
Optional.
20 minutes by default.
Enabling dynamic ARP entry check
The dynamic ARP entry check function controls whether the device supports dynamic ARP entries with
multicast MAC addresses.
When dynamic ARP entry check is enabled, the device cannot learn dynamic ARP entries containing
multicast MAC addresses.
When dynamic ARP entry check is disabled, the device can learn dynamic ARP entries containing
multicast MAC addresses.
To enable dynamic ARP entry check:
Step Command Remarks
1. Enter system view.
system-view N/A