efm mode

Function

The efm mode command configures the working mode of EFM on an interface.

The undo efm mode command restores the default working mode of EFM on an interface.

By default, EFM on an interface works in active mode.

Format

efm mode { active | passive }

undo efm mode

Parameters

Parameter	Description	Value
active	Indicates that EFM on an interface works in active mode.	-
passive	Indicates that EFM on an interface works in passive mode.	-

Views

Ethernet interface view, GE interface view, XGE interface view, 25GE interface view, 40GE interface view, 100GE interface view, MultiGE interface view, port group view

Default Level

2: Configuration level

Usage Guidelines

Usage Scenario

EFM supports two connection modes: active and passive. By setting the working mode of EFM OAM, you can configure whether a device can send or receive a specified type of EFM OAMPDU. Table 1 describes the differences between the active and passive modes.

**Table 1** Capabilities for processing OAMPDUs in active and passive modes
Event	Active Mode	Passive Mode
Initiate a connection request by sending an Information OAMPDU during the discovery process	Supported	Not supported
Respond to a connection request during the discovery process	Supported	Supported
Send Information OAMPDUs	Supported	Supported
Send Event Notification OAMPDUs	Supported	Supported
Send Loopback Control OAMPDUs	Supported	Not supported
Respond to Loopback Control OAMPDUs	Supported (The remote EFM entity must work in active mode.)	Supported

Precautions

The working mode of EFM can be set on an interface only after EFM is enabled globally and before EFM is enabled on the interface. The working mode of EFM on an interface cannot be changed after EFM is enabled on the interface. Before changing the working mode of EFM on an interface, run the undo efm enable command to disable EFM on the interface.
An EFM connection can only be initiated by an OAM entity working in active mode. An OAM entity working in passive mode waits to receive a connection request from its peer entity.
Two OAM entities both working in passive mode cannot establish an EFM connection between them.

Example

# Configure EFM OAM on Layer 2 interface GigabitEthernet0/0/1 to work in passive mode.

<HUAWEI> system-view
[HUAWEI] efm enable
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] efm mode passive

# Configure EFM OAM on Layer 3 interface GigabitEthernet0/0/1 to work in passive mode.

<HUAWEI> system-view
[HUAWEI] efm enable
[HUAWEI] interface gigabitethernet 0/0/1
[HUAWEI-GigabitEthernet0/0/1] undo portswitch
[HUAWEI-GigabitEthernet0/0/1] efm mode passive