R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)

6
Enabling ARP logging
This function enables a device to log ARP events when ARP cannot resolve IP addresses correctly. The
device can log the following 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 NATed external address.
• 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 NATed external address.
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 function:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enable the ARP logging
function.
arp check log enable By default, ARP logging is disabled.
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.
Execute display commands in any view and reset commands in user view.
Task Command
Display ARP entries
(MSR2000/MSR3000).
display arp [ [ all | dynamic | static ] | vlan vlan-id | interface
interface-type interface-number ] [ count | verbose ]
Display ARP entries (MSR4000).
display arp [ [ all | dynamic | static ] [ slot slot-number ] | vlan
vlan-id | interface interface-type interface-number ] [ count |
verbose ]
Display the ARP entry for an IP address
(MSR2000/MSR3000).
display arp ip-address [ verbose ]
Display the ARP entry for an IP address
(MSR4000).
display arp ip-address [ slot slot-number ] [ verbose ]
Display the ARP entries for a VPN instance. display arp vpn-instance vpn-instance-name [ count ]