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Configuration Guide - VPN

S1720, S2700, S5700, and S6720 V200R010C00

This document describes the VPN configuration procedures and provides configuration examples.
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Configuring Dynamic BFD for PWs

Configuring Dynamic BFD for PWs

Context

You must configure or delete BFD for PWs on the two PEs of a PW simultaneously; otherwise, the PW status on the two PEs may be different. Perform the following operations on the two PEs of the PW.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface interface-type interface-number

    The AC interface view is displayed.

  3. Run:

    mpls l2vpn pw bfd [ detect-multiplier multiplier | min-rx-interval rx-interval | min-tx-interval tx-interval ] * [ remote-vcid vc-id ] [ secondary ]

    A BFD session is created to detect a PW.

    You can run this command to create a BFD session or adjust BFD parameters.

    To configure BFD for a multi-hop PW, you must specify remote-vcid, namely, remote VC ID of the PW.

    To configure BFD for a standby PW, specify secondary.

  4. (Optional) Set the encapsulation type for BFD CV packets to be sent to remote peers.
    1. Run:

      quit

      Return to the system view.

    2. Run:

      mpls l2vpn

      The MPLS L2VPN view is displayed.

    3. Run any of the following commands:

      • To set the encapsulation type to 0x04 for BFD CV packets to be sent to all remote peers, run the mpls l2vpn vccv bfd-cv-negotiation fault-detection-only command.
      • To restore the default encapsulation type 0x08 of BFD CV packets to be sent to all remote peers, run the undo mpls l2vpn vccv bfd-cv-negotiation fault-detection-only command.
      • To set the encapsulation type to 0x04 for BFD CV packets to be sent to a specified remote peer, run the mpls l2vpn vccv bfd-cv-negotiation fault-detection-only peer peer-address enable command.
      • To set the encapsulation type to 0x08 for BFD CV packets to be sent to a specified remote peer, run the mpls l2vpn vccv bfd-cv-negotiation fault-detection-only peer peer-address disable command.
      • To restore the global encapsulation type of BFD CV packets to be sent to a specified remote peer, run the undo mpls l2vpn vccv bfd-cv-negotiation fault-detection-only peer peer-address command.

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Updated: 2019-08-21

Document ID: EDOC1000141944

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