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Configuration Guide - Reliability

CloudEngine 12800 and 12800E V200R002C50

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 EFM OAMPDU Parameters

(Optional) Setting EFM OAMPDU Parameters

Context

EFM entities exchange OAMPDUs periodically to report the link status. The network administrator can set EFM OAMPDU parameters to effectively manage networks.

EFM OAMPDU parameters include the maximum OAMPDU size, the interval at which EFM OAMPDUs are sent, and timeout interval at which OAMPDUs are received.
  • After the maximum OAMPDU size is set on an interface, the interface considers excess EFM OAMPDUs invalid and discards them.

  • After setting up an EFM connection, two EFM entities exchange OAMPDUs at a specific interval to check whether the connection is working properly. If an EFM entity does not receive any OAMPDU from its remote EFM entity within the interval at which OAMPDUs are received, it considers that the link is not working properly. The network administrator can set different intervals at which OAMPDUs are received based on user requirements. A short interval can be set for high-priority or delay-sensitive services. A long interval can be set for low-priority or delay-insensitive services.

EFM can be configured on Layer 2 and Layer 3 Ethernet interfaces. By default, an Ethernet interface works in Layer 2 mode. Before configuring EFM on a Layer 3 Ethernet interface, switch the Ethernet interface to Layer 3 mode.

Perform the following steps on the interfaces at both ends of a link.

Procedure

  • Setting the maximum size of an EFM OAMPDU

    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 packet max-size size

      The maximum size of an EFM OAMPDU is set.

      By default, the maximum size of an EFM OAMPDU on an interface is 128 bytes.

      If the maximum EFM OAMPDU sizes configured on the interfaces at both ends of a link are different, the interfaces negotiate the maximum EFM OAMPDU size during the discovery process. The smaller one between the maximum EFM OAMPDU sizes on the two ends is used.

    4. Run commit

      The configuration is committed.

  • Set the interval at which EFM OAMPDUs are sent.

    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 a link is displayed.

    3. Run efm interval interval-value

      The interval at which OAMPDUs are sent is set.

      The default interval is 1000 ms.

      You must set the same interval at which OAMPDUs are sent on the interfaces at both ends of a link. If you set different intervals at both ends, session negotiation fails or session flapping occurs.

      NOTE:

      The interval at which OAMPDUs are sent must be set for an interface only when EFM OAM has been globally enabled and EFM OAM has not been enabled on the interface.

    4. Run commit

      The configuration is committed.

  • Setting the timeout interval at which EFM OAMPDUs are received

    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 timeout timeout-value

      The timeout interval at which EFM OAMPDUs are received is set.

      By default, the timeout interval at which EFM OAMPDUs are received is 5000 ms.

      The interfaces at both ends of a link must use the same timeout interval. Otherwise, session negotiation between the two interfaces fails or the session flaps.

      NOTE:

      The timeout interval is set only after EFM is enabled globally but before EFM is enabled on an interface.

    4. Run commit

      The configuration is committed.

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Updated: 2019-03-21

Document ID: EDOC1000166606

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