Enabling Dynamic Arp Entry Check; Enabling Arp Logging; Displaying And Maintaining Arp - HPE FlexNetwork HSR6800 Configuration Manual

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.
To enable dynamic ARP entry check:
Step
1. Enter system view.
2. Enable dynamic ARP entry
check.

Enabling ARP logging

This feature enables a device to log ARP events when ARP cannot resolve IP addresses correctly.
The device can log the following ARP events:
•
On a proxy ARP-disabled interface, the target IP address of a received ARP packet is not one of
the following IP addresses:
The IP address of the receiving interface.
The virtual IP address of the VRRP group.
The public IP address after NAT.
•
The sender IP address of a received ARP reply conflicts with one of the following IP addresses:
The IP address of the receiving interface.
The virtual IP address of the VRRP group.
The public IP address after NAT.
The device sends ARP log messages to the information center. You can use the info-center source
command to specify the log output rules for the information center. For more information about
information center, see Network Management and Monitoring Configuration Guide.
To enable the ARP logging feature:
Step
1. Enter system view.
2. Enable the ARP logging
feature.

Displaying and maintaining ARP

IMPORTANT:
Clearing ARP entries from the ARP table might cause communication failures. Make sure the entries
to be cleared do not affect current communications.
Command
system-view
arp check enable
Command
system-view
arp check log enable
5
Remarks
N/A
By default, dynamic ARP entry check is
enabled.
Remarks
N/A
By default, ARP logging is disabled.