damp-interface level (interface view)

Function

The damp-interface level command configures a suppression level for a flapping interface.

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

By default, a flapping interface is suppressed at a light level.

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: 1-60 suppress: 1-20000 reuse: 1-20000 max-suppress-time: 1-255
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 (inceased 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 (inceased 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

100GE-Trunk member Layer 2 interface view, 100GE-Trunk member interface view, Layer 2 100GE interface view, 100GE interface view, Layer 2 10GE interface view, 10GE interface view, 25GE-L2 view, 25GE interface view, 400GE-L2 view, 400GE interface view, 40GE-Trunk member Layer 2 interface view, 40GE-Trunk member interface view, Layer 2 40GE interface view, 40GE interface view, Layer 2 50GE interface view, 50GE interface view, Layer 2 GE interface view, GE optical interface view, GE interface view, GE electrical interface view

Default Level

2: Configuration level

Task Name and Operations

Task Name	Operations
interface-mgr	write

Usage Guidelines

Usage Scenario

Intermittent disconnection of an optical fiber connected to a physical interface causes the interface status to alternate frequently between Up and Down. The damp-interface function can suppress a flapping interface at the physical layer. Therefore, stability of the entire link layer and network layer is guaranteed. When damp-interface is enabled, run the damp-interface level command to configure a light, middle, or heavy suppression based on damp-interface requirements:

Light: If a light damp-interface is configured, status flapping suppression is triggered only when the interface flaps frequently and rapidly.
Heavy: If a heavy damp-interface is configured, status flapping suppression is triggered even if the interface does not flap severely. This is, a flapping interface tends to be easily suppressed.
Middle: Intensity of the middle damp-interface is between the light and heavy damp-interfaces.
Manual: When the light, middle, heavy levels fail to meet suppression requires, you can specify this parameter to manually control the suppression level.

Prerequisites

Status flapping suppression has been enabled on a physical interface using the damp-interface enable command.

Example

# Configure a flapping interface to be suppressed at the middle level.

<HUAWEI> system-view
[~HUAWEI] interface GigabitEthernet0/1/0
[~HUAWEI-GigabitEthernet0/1/0] damp-interface enable
[*HUAWEI] damp-interface level middle