ARP_1.3.6.1.4.1.2011.5.25.123.2.4 hwEthernetARPThresholdExceedAlarm

Description

ARP/4/ARP_THRESHOLDEXCEED_TRAP:OID [OID] The number of ARP entries exceeded the threshold. (entPhysicalIndex=[INTEGER], Slot name=[OCTET], Threshold=[COUNTER], Number of dynamic ARP entries=[COUNTER], Number of static ARP entries=[COUNTER]).

The number of ARP entries exceeds the upper threshold.

Attribute

Alarm ID	Alarm Severity	Alarm Type
1.3.6.1.4.1.2011.5.25.123.2.4	Warning	qualityOfServiceAlarm(3)

Parameters

Name	Meaning
oid	Indicates the MIB object ID of the alarm.
entPhysicalIndex	Indicates the index of the physical entity.
Slot name	Indicates the device name.
Threshold	Indicates the alarm threshold, that is, 80 percent of the total number of ARP entries supported by the switch. The alarm threshold cannot be modified.
Number of dynamic ARP entries	Indicates the number of dynamic ARP entries.
Number of static ARP entries	Indicates the number of static ARP entries.

Impact on the System

If this alarm is displayed, the number of ARP entries on the device is great. If the number continuously increases, system resources become insufficient and no new ARP entries can be learned. As a result, service interruption may occur.

Possible Causes

The number of ARP entries on the device exceeded the upper threshold.

Procedure

Run the display arp statistics command to view ARP entry statistics on the device and check whether there are more static ARP entries or dynamic ARP entries.
- If there are more dynamic ARP entries, go to Step 2.
- If there are more static ARP entries, go to Step 3.
Run the display arp all command to identify the interface that has more ARP entries. Then run the display arp interface command to check ARP entries on the interface and determine whether these ARP entries are necessary for the interface.
- If these ARP entries are necessary, go to Step 5.
- If these ARP entries are not necessary, run the reset arp command to delete certain ARP entries (without system running being affected) and go to Step 4.
Run the display current-configuration command to view static ARP entries and check whether these static ARP entries are necessary.
- If these static ARP entries are necessary, go to Step 5.
- If these static ARP entries are not necessary, run the undo arp static command to delete certain static ARP entries (without system running being affected) or run the undo arp staticreset arp static command to clear all static ARP entries. Then go to Step 4.
Run the display arp statistics command to check whether the number of ARP entries still continuously increases unexpectedly.
- If the number of ARP entries does not continuously increase, go to Step 6.
- If the number of ARP entries still continuously increases, go to Step 5.
Collect alarm information and configuration information, and then contact technical support personnel.
End.

Related Information

None