ARP_1.3.6.1.4.1.2011.5.25.123.2.1 hwEthernetARPSpeedLimitAlarm

Trap Buffer Description

Packet speed exceeded the configured speed limit. (IfIndex=[IfIndex], SuppressValue=[SupValue], CurrentValue=[CurValue], SuppressType=[SupType], SourceIP=[SrcIp], DestinationIP=[DstIp], VpnInstance name=[VpnName])

The transmit rate of ARP packets exceeded the configured rate limit.

Trap Attributes

Trap Attribute	Description
Alarm or Event	Event
Trap Severity	Warning
Mnemonic Code	ARP_SPEED_LIMIT
Trap OID	1.3.6.1.4.1.2011.5.25.123.2.1
MIB	HUAWEI-ETHARP-MIB
Alarm ID	This is an event trap and does not involve alarm ID.
Alarm Name	This is an event trap and does not involve alarm name.
Alarm Type	This is an event trap and does not involve alarm type.
Raise or Clear	This is an event trap and does not involve alarm generation or clearance.
Match trap	-

Trap Buffer Parameters

Parameter	Description
IfIndex	Interface index.
SupValue	Rate limit of ARP packets or ARP Miss messages.
CurValue	Current transmit rate of ARP packets or ARP Miss messages.
SupType	Type of packets that are suppressed: ARP packets or ARP Miss messages.
SrcIp	Source IP addresses of ARP packets or ARP Miss messages.
DstIp	Destination IP addresses of ARP packets or ARP Miss messages.
VpnName	VPN instances that ARP packets or ARP Miss messages belong to.

VB Parameters

VB OID	VB Name	VB Index
1.3.6.1.4.1.2011.5.25.123.1.4	hwEthernetARPSpeedLimitIfIndex	-
1.3.6.1.4.1.2011.5.25.123.1.5	hwEthernetARPSpeedLimitConfigured	-
1.3.6.1.4.1.2011.5.25.123.1.6	hwEthernetARPSpeedLimitCurrent	-
1.3.6.1.4.1.2011.5.25.123.1.7	hwEthernetARPSpeedLimitType	-
1.3.6.1.4.1.2011.5.25.123.1.8	hwEthernetARPSpeedLimitSrcIPAddr	-
1.3.6.1.4.1.2011.5.25.123.1.9	hwEthernetARPSpeedLimitDstIPAddr	-
1.3.6.1.4.1.2011.5.25.123.1.10	hwEthernetARPSpeedLimitVPNinstance	-

Impact on the System

If ARP packets are suppressed, the transmit rate of ARP packets exceeds the configured rate limit.

As a result, some ARP packets are discarded and traffic cannot be forwarded normally.

If ARP Miss messages are suppressed, the transmit rate of ARP Miss messages exceeds the configured rate limit.

As a result, some ARP Miss messages are discarded and ARP Request messages cannot be triggered. Therefore, traffic cannot be forwarded normally.

Possible Causes

Cause 1: The transmit rate of ARP packets exceeded the configured rate limit.

Cause 2: The transmit rate of ARP Miss messages exceeded the configured rate limit.

Procedure

1. Run the display arp speed-limit command to check the configured rate limit of ARP packets.

2. Run the arp speed-limit destination-ip maximum maximum slot slot-id command to reset the rate limit of ARP packets. The value must be greater than the value obtained in Step 1 but less than 65536. Then, check whether the trap is cleared.

If the trap is cleared, go to Step 4.
If the trap persists, go to Step 3.

3. Collect log information and configuration information, and then contact technical support personnel.

4. End.