HPE 5920 series User Manual

2
Usage guidelines
This function 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 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 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.
The device can generate a large amount of ARP logs. To conserve system resources, enable ARP
logging only when you are troubleshooting or debugging ARP events.
Examples
# Enable ARP logging.
<Sysname> system-view
[Sysname] arp check log enable
arp max-learning-num
Use arp max-learning-num to set the maximum number of dynamic ARP entries that an interface
can learn.
Use undo arp max-learning-num to restore the default.
Syntax
arp max-learning-num number
undo arp max-learning-num
Default
An interface can learn a maximum of 16384 dynamic ARP entries.
Views
Layer 2 Ethernet interface view, Layer 3 Ethernet interface view, Layer 3 Ethernet subinterface view,
VLAN interface view, Layer 2 aggregate interface view, Layer 3 aggregate interface view, Layer 3
aggregate subinterface view, S-channel interface view, S-channel aggregate interface view
Predefined user roles
network-admin
Parameters
number: Specifies the maximum number of dynamic ARP entries for an interface. The value range is
0 to 16384.

HPE 5920 series Specifications

General

Brand	HPE
Model	5920 series
Category	Switch
Language	English