fast-link-down disable

Function

The fast-link-down disable command enables an interface to go Down after a delay.

The undo fast-link-down disable command disables an interface from going Down after a delay.

By default, an interface is disabled from going Down after a delay.

Only the GE electrical interfaces of the following models support this command:

S2720-EI, S5720-LI, S5720S-LI, S5720-SI, S5720I-SI, S5720S-SI, S5730-SI, S5730S-EI, S5735-L, S5735S-L, S5735S-L-M, S5735-S, S5735-S-I, S5735S-S, and S6720-SI

Format

fast-link-down disable

undo fast-link-down disable

Parameters

None

Views

GE interface view, port group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

After an interface is enabled to go Down after a delay, the device detects the interface Down event after a delay of hundreds of milliseconds. When the interface alternates between Up and Down states, the interface does not go Down immediately, enhancing the anti-interference capability of the device.

Precautions

If the energy-efficient-ethernet enable command has been executed to enable the EEE function on an electrical interface, the interface cannot be enabled to go Down after a delay. If the fast-link-down disable command has been executed to enable the interface to go Down after a delay, you can still run the energy-efficient-ethernet enable command to enable the EEE function on the interface.
If the loopback detection mode has been configured on an interface using the loopback command, the interface cannot be enabled to go Down after a delay. If the fast-link-down disable command has been executed to enable the interface to go Down after a delay, you can still run the loopback command to configure the loopback detection mode for the interface.

Example

# Enable an interface to go Down after a delay.

<HUAWEI> system-view
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] fast-link-down disable