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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring Forwarding Adjacency

Configuring Forwarding Adjacency

The forwarding adjacency is configured on the ingress of a CR-LSP. The forwarding adjacency allows a route of a CR-LSP to be advertised to neighbors so that these neighbors can use this CR-LSP to transmit traffic.

Context

A routing protocol performs bidirectional detection on a link. The forwarding adjacency needs to be enabled on both ends of a tunnel. The forwarding adjacency allows a node to advertise a CR-LSP route to other nodes. Another tunnel for transferring data packets in the reverse direction must be configured.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface tunnel tunnel-number

    The view of an MPLS TE tunnel interface is displayed.

  3. Run mpls te igp advertise [ hold-time interval | include-ipv6-isis ] *

    The forwarding adjacency is configured.

    If IPv6 IS-IS is used, the include-ipv6-isis parameter must be configured.

  4. Run mpls te igp metric { absolute | relative } value

    The IGP metric value of the MPLS TE tunnel is configured.

    NOTE:

    A proper IGP metric value helps correctly advertise and use a CR-LSP route. The metric value of a CR-LSP must be less than the metric value of an unwanted IGP route.

    If relative is configured and IS-IS is used as an IGP, this step cannot modify the IS-IS metric value. To change the IS-IS metric value, configure absolute in this step.

  5. You can select either of the following modes to enable the forwarding adjacency.

    • For IS-IS, run isis enable [ process-id ]

      IS-IS is enabled on the tunnel interface.

    • For OSPF, run the following commands in sequence.
      1. Run the quit command to return to the system view.

      2. Run the ospf [ process-id ] command to enter the OSPF view.

      3. Run the enable traffic-adjustment advertise command to enable the forwarding adjacency.

  6. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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