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NE40E V800R010C00 Configuration Guide - MPLS 01

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Enabling MPLS TE FRR and Configuring Attributes for an Automatic Bypass Tunnel

Enabling MPLS TE FRR and Configuring Attributes for an Automatic Bypass Tunnel

After MPLS TE FRR is enabled on the ingress of a primary tunnel, a bypass tunnel is established automatically.

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    interface tunnel tunnel-number

    The view of the primary tunnel interface is displayed.

  3. Run:

    mpls te fast-reroute [ bandwidth ]

    TE FRR is enabled.

    If TE FRR bandwidth protection is needed, configure the bandwidth parameter in this command.

  4. (Optional) Run:

    mpls te bypass-attributes [ bandwidth bandwidth | priority setup-priority [ hold-priority ] ]

    Attributes are set for the automatic bypass tunnel.

    NOTE:
    • The bandwidth attribute can only be set for the bypass tunnel after the mpls te fast-reroute bandwidth command is run for the primary tunnel.

    • The bypass tunnel bandwidth cannot exceed the primary tunnel bandwidth.

    • If no attributes are configured for an automatic bypass tunnel, by default, the automatic bypass tunnel uses the same bandwidth as that of the primary tunnel.

    • The setup priority of a bypass tunnel must be lower than or equal to the holding priority. These priorities cannot be higher than the corresponding priorities of the primary tunnel.

    • If the primary tunnel bandwidth is changed or FRR is disabled, the bypass tunnel attributes are automatically deleted.

  5. (Optional) Configure affinities for the automatic bypass tunnel.

    Affinities determine link attributes of an automatic bypass tunnel. Affinities and a link administrative group attribute are used together to determine over which links the automatic bypass tunnel can be established.

    Perform either of the following configurations:

    • Set a hexadecimal number.

      1. Run:

        quit

        The system view is displayed.

      2. Run:

        interface interface-type interface-number

        The interface view of the link through which a bypass tunnel passes is displayed.

      3. Run:

        mpls te link administrative group value

        An administrative group attribute is specified.

      4. Run:

        quit

        The system view is displayed.

      5. Run:

        interface tunnel tunnel-number

        The tunnel interface view of the primary tunnel is displayed.

      6. Run:

        mpls te bypass-attributes affinity property properties [ mask mask-value] 

        An affinity of the bypass tunnel is configured.

    • Set an affinity name.

      Naming an affinity makes the affinity easy to understand and maintain. Setting an affinity name is recommended.

      1. Run:

        quit

        The system view is displayed.

      2. Run:

        path-constraint affinity-mapping

        An affinity name mapping template is configured, and the template view is displayed.

        Repeat this step on each node used to calculate the path over which an automatic bypass tunnel is established. The affinity name configured on each node must match the mappings between affinity bits and names.

      3. Run:

        attribute affinity-name bit-sequence bit-number

        Mappings between affinity bits and names are configured.

        This step can be performed to configure one affinity bit. Repeat this step to configure more affinity bits. You can configure some or all 32 affinity bits.

      4. Run:

        quit

        The system view is displayed.

      5. Run:

        interface interface-type interface-number

        The interface view of the link through which a bypass tunnel passes is displayed.

      6. Run:

        mpls te link administrative group name bit-name &<1-32>

        An administrative group attribute is specified.

      7. Run:

        quit

        The system view is displayed.

      8. Run:

        interface tunnel tunnel-number

        The tunnel interface view of the primary tunnel is displayed.

      9. Run:

        mpls te bypass-attributes affinity { include-all | include-any | exclude } bit-name &<1-32>

        An affinity of the bypass tunnel is configured.

      NOTE:

      If an automatic bypass tunnel that satisfies the specified affinity cannot be established, a node will bind a manual bypass tunnel satisfying the specified affinity to the primary tunnel.

  6. Run:

    commit

    The configurations are committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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