HPE FlexNetwork MSR Series Comware 7 Layer 3 - Ip Services Configuration Guides

5
Setting the maximum number of dynamic ARP
entries for an interface
An interface can dynamically learn ARP entries. To prevent an interface from holding too many ARP
entries, you can set the maximum number of dynamic ARP entries that the interface can learn. When
the maximum number is reached, the interface stops learning ARP entries.
You can set limits for both a Layer 2 interface and the VLAN interface for a permitted VLAN on the
Layer 2 interface. The Layer 2 interface learns an ARP entry only when neither limit is reached.
The total number of dynamic ARP entries that all interfaces learn will not be larger than the maximum
number of dynamic ARP entries set for the device.
To set the maximum number of dynamic ARP entries for an interface:
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 for
the interface.
arp max-learning-num
max-number
For information about the default
maximum number of dynamic ARP
entries for an interface, see Layer
3—IP Services Command Reference.
To disable the interface from learning
dynamic ARP entries, set the number
to 0.
Setting 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.
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 The default setting is 20 minutes.
Enabling 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.

HPE FlexNetwork MSR Series Specifications

General

Brand	HPE
Model	FlexNetwork MSR Series
Category	Network Router
Language	English