efm holdup-timer

Function

The efm holdup-timer command sets a time during which the EFM OAM protocol state of an interface remains Down.

The undo efm holdup-timer command restores the default time.

By default, the time is 0 seconds.

Format

efm holdup-timer time

undo efm holdup-timer

Parameters

Parameter	Description	Value
time	Specifies a time during which the EFM OAM protocol state of an interface remains Down.	The value is an integer ranging from 0 to 65535, in seconds.

Parameter

Description

Value

time

Specifies a time during which the EFM OAM protocol state of an interface remains Down.

The value is an integer ranging from 0 to 65535, in seconds.

Views

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, Layer 2 40GE interface view, 40GE interface view, Layer 2 50GE interface view, 50GE interface view, FlexE 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
efm	write

Usage Guidelines

Usage Scenario

After the efm trigger if-down command is run to associate EFM OAM with a specified interface, the link layer protocol status of the interface is set to Down if a link connectivity fault is detected. This triggers rapid route convergence, blocks services, and implements rapid route switchovers. If a link connectivity fault is rectified, the status of the interface will be set to Up after the time specified by the efm holdup-timer command. The EFM OAM protocol state of the interface does not change to Up within the specified time. After the time expires, EFM OAM checks the link connectivity again.

After the failed link recovers, EFM OAM works as follows:

If time parameter is not specified, the EFM OAM protocol state of the interface immediately changes to Up.
If time parameter is specified, the EFM OAM protocol state of the interface changes to Up only after the specified time expires. This prevents the link from frequently alternating between Up and Down. You can run the recover efm-down command to immediately change the EFM OAM protocol state of the interface from Down to Up.

Prerequisites

EFM OAM has been globally enabled using the efm enable command in the system view.

Configuration Impact

After the efm holdup-timer command is run, the EFM OAM protocol state of an interface changes from Down to Up after the configured time expires and a link connectivity fault is rectified.

Example

# Set a time during which the EFM OAM protocol state of an interface remains Down to 10 seconds.

<HUAWEI> system-view
[~HUAWEI] efm enable
[*HUAWEI] interface GigabitEthernet0/1/0
[*HUAWEI-GigabitEthernet0/1/0] efm enable
[*HUAWEI-GigabitEthernet0/1/0] efm trigger if-down
[*HUAWEI-GigabitEthernet0/1/0] efm holdup-timer 10