lsa-arrival-interval suppress-flapping

Function

The lsa-arrival-interval suppress-flapping command configures a suppression period in case received OSPF LSAs flap.

The undo lsa-arrival-interval suppress-flapping command restores the default suppression period.

By default, the suppression period is 10s, and the suppression threshold is 30.

Format

lsa-arrival-interval suppress-flapping suppress-interval [ threshold threshold ]

undo lsa-arrival-interval suppress-flapping

Parameters

Parameter	Description	Value
suppress-interval	Specifies the suppression period that takes effect when received OSPF LSAs flap.	The value is an integer ranging from 0 to 600, in seconds. The default value is 10s.
threshold threshold	Specifies the suppression threshold that takes effect when received OSPF LSAs flap.	The value is an integer ranging from 3 to 100. The default value is 30.

Parameter

Description

Value

suppress-interval

Specifies the suppression period that takes effect when received OSPF LSAs flap.

The value is an integer ranging from 0 to 600, in seconds. The default value is 10s.

threshold threshold

Specifies the suppression threshold that takes effect when received OSPF LSAs flap.

The value is an integer ranging from 3 to 100. The default value is 30.

Views

OSPF view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
ospf	write

Usage Guidelines

Usage Scenario

If no flapping occurs among received OSPF LSAs, the configuration of the lsa-arrival-interval command prevents the device from frequently receiving LSAs. If received OSPF LSAs flap, the configuration of the lsa-arrival-interval suppress-flapping command minimizes the impact of the flapping on services. The larger value of the two intervals specified in the commands is used as the suppression period.

The suppression mechanism takes effect based on the following rules:

Flapping detection: OSPF starts a flapping counter. If the interval between two OSPF LSAs that are received successively is less than or equal to 10s, OSPF records a flapping event and increases the flapping_count by 1.
Suppression phase: If the flapping_count is greater than or equal to suppression threshold, flapping suppression takes effect.
Suppression exit: If the interval between two OSPF LSAs that are received successively is greater than 10s, OSPF resets the flapping_count and exits from suppression.

Example

# Set the suppression period that takes effect when received OSPF LSAs flap to 200s.

<HUAWEI> system-view
[~HUAWEI] ospf 1
[*HUAWEI-ospf-1] lsa-arrival-interval suppress-flapping 200