damp-interface level

Function

The damp-interface level command configures a suppression level for interfaces' physical status flappings.

The undo damp-interface level command restores the default configuration.

By default, no suppression level is configured for interfaces' physical status flappings.

Format

damp-interface level { light | middle | heavy | manual { half-life-period suppress reuse max-suppress-time } }

undo damp-interface level { middle | heavy | manual }

Parameters

Parameter	Description	Value
light	Indicates that a flapping interface is suppressed at a light level.	The values are as follows: half-life-period: 11 suppress: 7700 reuse: 6000 max-suppress-time: 10
middle	Indicates that a flapping interface is suppressed at a middle level.	The values are as follows: half-life-period: 16 suppress: 5500 reuse: 4300 max-suppress-time: 12
heavy	Indicates that a flapping interface is suppressed at a heavy level.	The values are as follows: half-life-period: 25 suppress: 3500 reuse: 2700 max-suppress-time: 18
manual	Indicates that a flapping interface is manually suppressed.	The value ranges are as follows: half-life-period: from 1 to 60 suppress: from 1 to 20000 reuse: from 1 to 20000 max-suppress-time: from 1 to 255
half-life-period	Specifies a half-life period for a penalty value.	The value is an integer ranging from 1 to 60, in seconds.
suppress	Specifies a suppression value, which is 1000 times the suppression threshold of an interface. The interface is suppressed when the penalty value (increased by 1 each time the interface goes down) is greater than the suppression value.	The value is an integer ranging from 1 to 20000. The suppress value must be greater than the reuse value.
reuse	Specifies a reuse value, which is 1000 times the reuse threshold of an interface. The interface is no longer suppressed when the penalty value (increased by 1 each time the interface goes down) is less than the reuse value.	The value is an integer ranging from 1 to 20000. The reuse value must be less than the suppress value.
max-suppress-time	Specifies the maximum suppression time.	The value is an integer ranging from 1 to 255, in seconds.

Views

System view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
interface-mgr	write

Usage Guidelines

Usage Scenario

Intermittent disconnections of optical fibers connecting to physical interfaces cause these interfaces' status to alternate frequently between Up and Down. To prevent this problem and improve the link-layer and network-layer stability, these interfaces' status can be suppressed. You can run the damp-interface level command to configure a desired suppression level:

light: If light suppression is configured, the system triggers suppression only when an interface's status flaps frequently and rapidly.
heavy: If heavy suppression is configured, the system triggers suppression when detecting an interface's status begins to flap, even if the flapping is not severe. In the heavy suppression level, an interface is prone to be suppressed.
middle: The intensity of middle suppression is between the light and heavy levels.
manual: If light, middle, or heavy suppression cannot meet your requirement, you can specify manual.

Prerequisites

Suppression on interfaces' physical status flappings has been enabled using the damp-interface enable command.

Example

# Configure the middle suppression level for interfaces' physical status flappings.

<HUAWEI> system-view
[~HUAWEI] damp-interface enable
[*HUAWEI] damp-interface level middle