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NE40E V800R010C00 Configuration Guide - MPLS 01

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(Optional) Modifying BFD Parameters

(Optional) Modifying BFD Parameters

BFD parameters, such as BFD detection intervals and detection multipliers, can be modified.

Context

Perform the following steps on the ingress:

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    bfd

    The BFD view is displayed.

  3. Run:

    mpls ping interval interval

    The interval at which LSP Ping packets are sent is changed.

  4. Run:

    quit

    Exit from the BFD view.

  5. Run:

    mpls

    The MPLS view is displayed.

  6. (Optional) Run:

    mpls bfd { min-tx-interval interval | min-rx-interval interval | detect-multiplier multiplier }*

    BFD parameters are set.

    BFD detection intervals are calculated as follows:

    • Effective local interval at which BFD packets are sent = MAX { Configured local interval at which BFD packets are sent, Configured remote interval at which BFD packets are received }
    • Effective local interval at which BFD packets are received = MAX { Configured remote interval at which BFD packets are sent, Configured local interval at which BFD packets are received }
    • Effective local detection interval = Effective local interval at which BFD packets are received x Configured remote detection multiplier

    Therefore, you can adjust the minimum interval at which BFD packets are sent, the minimum interval at which BFD packets are received, and the detection multiplier only on the ingress to update BFD detection time on the ingress and egress.

    NOTE:

    When POS-Trunk interfaces work in 1:1 mode, the local actual receiving interval must be greater than or equal to three times of the POS-Trunk switchover time. Otherwise, the BFD session may go Down during the POS-Trunk switchover.

  7. (Optional) Run:

    mpls bfd-tunnel

    BFD parameters are set.

    Effective local interval at which BFD packets are sent = MAX { Locally configured interval at which BFD packets are sent, Remotely configured interval at which BFD packets are received }

    Effective local interval at which BFD packets are received = MAX { Remotely configured interval at which BFD packets are sent, Locally configured interval at which BFD packets are received }

    Local BFD detection period = Effective local interval at which BFD packets are received x Remotely configured BFD detection multiplier

    If both the mpls bfd-tunnel and mpls bfd commands are run, parameters configured using the mpls bfd-tunnel command take precedence.

  8. Run:

    commit

    The configuration is committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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