R211x-HP Flexfabric 11900 Layer 3 - IP Services Configuration Guide

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

By default, the aging time for

dynamic ARP entries is 20 minutes.

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 Command Remarks

1. Enter system view.

system-view N/A

2. Enable dynamic ARP entry check.

arp check enable

By default, dynamic ARP entry check is

enabled.

Enabling ARP logging

This function enables a device to log ARP events in ARP resolution.

To enable ARP logging:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enable ARP logging.

arp check log enable By default, ARP logging is disabled.