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AR100-S, AR110-S, AR120-S, AR150-S, AR160-S, AR200-S, AR1200-S, AR2200-S, and AR3200-S V200R009 CLI-based Configuration Guide - MPLS
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Configuring Dynamic BFD for RSVP

Configuring Dynamic BFD for RSVP

Pre-configuration Tasks

When a Layer 2 device exists between a PLR and its downstream neighbors, configure dynamic BFD for RSVP to detect link faults between RSVP neighboring nodes.

Before configuring dynamic BFD for RSVP, complete one of the following tasks:

Configuration Procedure

Except that adjusting BFD parameters is optional, other configurations are mandatory.

Enabling BFD Globally

Context

To configure dynamic BFD for RSVP, you must enable BFD on both ends of RSVP neighbors.

Perform the following configurations on the two RSVP neighboring nodes with a Layer 2 device exists between them.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run bfd

    BFD is enabled globally.

Enabling BFD for RSVP

Context

Enabling BFD for RSVP in the following manners:

Perform the following configurations on the two RSVP neighboring nodes with a Layer 2 device exists between them.

Procedure

  • Enable BFD for RSVP globally.
    1. Run system-view

      The system view is displayed.

    2. Run mpls

      The MPLS view is displayed.

    3. Run mpls rsvp-te bfd all-interfaces enable

      BFD for RSVP is enabled globally.

      After this command is run in the MPLS view, BFD for RSVP is enabled on all RSVP interfaces except the interfaces with BFD for RSVP that are blocked.

    4. (Optional) Disable BFD for RSVP on the RSVP interfaces that does not need to be enabled with BFD for RSVP.

      1. Run quit

        Return to the system view.

      2. Run interface interface-type interface-number

        The view of the RSVP-TE-enabled interface is displayed.

      3. Run mpls rsvp-te bfd block

        BFD for RSVP is disabled on the interface.

  • Enable BFD for RSVP on the RSVP interface.
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The view of the RSVP-TE-enabled interface is displayed.

    3. Run mpls rsvp-te bfd enable

      BFD for RSVP is enabled on the RSVP interface.

(Optional) Adjusting BFD Parameters

Context

BFD parameters are adjusted on the ingress node of a TE tunnel using either of the following modes:

Perform the following configurations on the two RSVP neighboring nodes with a Layer 2 device exists between them.

Procedure

  • Adjust global BFD parameters globally.
    1. Run system-view

      The system view is displayed.

    2. Run mpls

      The MPLS view is displayed.

    3. Run mpls rsvp-te bfd all-interfaces { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } *

      BFD parameters are set globally.

      Parameters are described as follows:

      • tx-interval indicates the Desired Min Tx Interval (DMTI), that is, the desired minimum interval for the local end sending BFD control packets.

      • rx-interval indicates the Required Min Rx Interval (RMRI), that is, the supported minimum interval for the local end receiving BFD control packets.

      • multiplier indicates the BFD detection multiplier.

      BFD detection parameters that take effect on the local node may be different from the configured parameters:

      • Actual local sending interval = MAX { Locally-configured DMTI, Remotely-configured RMRI }

      • Actual local receiving interval = MAX { Remotely-configured DMTI, Locally-configured RMRI }

      • Actual local detection interval = Actual local receiving interval x Configured remote detection multiplier

  • Adjust BFD parameters on an RSVP interface.
    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The view of the RSVP-TE-enabled interface is displayed.

    3. Run mpls rsvp-te bfd { min-tx-interval tx-interval | min-rx-interval rx-interval | detect-multiplier multiplier } *

      BFD parameters on the RSVP interface are adjusted.

Verifying the Configuration of Dynamic BFD for RSVP

Prerequisites

The configurations of dynamic BFD for RSVP are complete.

Procedure

  • Run the display mpls rsvp-te bfd session { all | interface interface-type interface-number | peer ip-address } [ verbose ] command to check information about the BFD for RSVP session.
  • Run the display mpls rsvp-te command to check the RSVP-TE configuration.
  • Run the display mpls rsvp-te interface [ interface-type interface-number ] command to check the RSVP-TE configuration on the interface.
  • Run the display mpls rsvp-te peer [ interface interface-type interface-number ] command to check information about the RSVP neighbor.
  • Run the display mpls rsvp-te statistics { global | interface [ interface-type interface-number ] } command to check RSVP-TE statistics.
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Updated: 2020-09-15

Document ID: EDOC1000174113

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