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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring a Policy for Triggering Dynamic BFD for LDP LSPs

Configuring a Policy for Triggering Dynamic BFD for LDP LSPs

A BFD session can be created to monitor an LDP LSP only after a policy for triggering dynamic BFD is configured.

Context

A policy can be enforced to establish a session of dynamic BFD for LDP LSP in either of the following modes:

  • Host mode: applies when all host addresses are used to establish a BFD session. You can specify nexthop and outgoing-interface to define LSPs that support a BFD session.

  • FEC list mode: applies when only some host addresses are used to establish a BFD session. You can use the fec-list command to specify host addresses.

Perform the following steps on the ingress of an LSP to be monitored:

Procedure

  1. Run system-view

    The system view is displayed.

  2. (Optional) To use a FEC list, perform the following operations:
    1. Run fec-list list-name

      A FEC list is created, and the FEC list view is displayed.

    2. Run fec-node ip-address [ nexthop ip-address | outgoing-interface interface-type interface-number ] *

      A FEC node is added to the FEC list.

    3. Run quit

      Return to the system view.

  3. Run mpls

    The MPLS view is displayed.

  4. Run mpls bfd-trigger { host [ nexthop next-hop-address | outgoing-interface interface-type interface-number ] * | fec-list list-name } [ option-tlv ]

    The policy for establishing a session of dynamic BFD for LDP LSP is configured.

    After the command is run, the BFD session starts to be created.

  5. (Optional) Run mpls bfd-option-tlv ip-prefix ip-prefix-name

    An IP prefix list is configured to trigger the establishment of LDP BFD sessions working in compatible mode so that a Huawei device communicates with a specified range of non-Huawei devices.

    If the mpls bfd-trigger command has been run to configure the BFD compatible mode globally, the mpls bfd-option-tlv ip-prefix command does not take effect after being run.

  6. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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