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Configuration Guide - Reliability

CloudEngine 8800, 7800, 6800, and 5800 V200R003C00

This document describes the configurations of Reliability, including BFD Configuration, VRRP Configuration, DLDP Configuration, Smart Link and Monitor Link Configuration, EFM Configuration, and CFM Configuration.
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(Optional) Setting the EFM Working Mode on an Interface

(Optional) Setting the EFM Working Mode on an Interface


EFM supports two connection modes: active and passive. Table 6-8 describes the differences between the active and passive modes.

Table 6-8 Capabilities for processing OAMPDUs in active and passive modes


Active Mode

Passive Mode

Initiate a connection request by sending an Information OAMPDU during the discovery process


Not supported

Respond to a connection request during the discovery process



Send Information OAMPDUs



Send Event Notification OAMPDUs



Send Loopback Control OAMPDUs


Not supported

Respond to Loopback Control OAMPDUs

Supported (The remote EFM entity must work in active mode.)


EFM can be configured on Layer 2 and Layer 3 Ethernet interfaces.


  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The view of the interface at one end of the link is displayed.

  3. Run efm mode { active | passive }

    The EFM working mode on the interface is configured.

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

    • 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.

    • When using EFM to monitor a link, ensure that either of the interfaces at both ends of the link operates in active mode.
      • If both ends of a link are configured to work in active EFM mode, link detection can be implemented.

      • If both ends of a link are configured to work in passive mode, link detection cannot be implemented.

  4. Run commit

    The configuration is committed.

Updated: 2019-05-08

Document ID: EDOC1100004359

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