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NE40E V800R010C00 Configuration Guide - MPLS 01

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(Optional) Configuring the Reliability Enhancement Function for a P2MP Tunnel

(Optional) Configuring the Reliability Enhancement Function for a P2MP Tunnel

Configure a function to improve service reliability as needed.

Context

To improve reliability of traffic transmitted along a P2MP tunnel, configure either of the following reliability enhancement functions:

  • Rapid MPLS P2MP switching

    With this function, if a device detects a fault in the active link, it rapidly switches services to the standby link over which an MPLS P2MP tunnel is established, which improves service reliability.

  • Multicast load balancing on a trunk interface

    Without this function, a device randomly selects a trunk member interface to forward multicast traffic. If this member interface fails, multicast traffic is interrupted. With this function, multicast traffic along a P2MP tunnel is balanced among all trunk member interfaces. This function helps improve service reliability and increase available bandwidth for multicast traffic.

  • MPLS P2MP load balancing

    To enable P2MP load balancing globally, run the mpls p2mp force-loadbalance enable command. In a multicast scenario where load balancing is configured in the Eth-Trunk interface view, if a leaf node connected to the Eth-Trunk interface joins or quits the multicast model, packet loss occurs on the other leave nodes connected to the non-Eth-Trunk interfaces due to the model change. After the mpls p2mp force-loadbalance enable command is run, load balancing is forcibly enabled in the system view, therefore preventing packet loss.

Procedure

  • Configure rapid MPLS P2MP switching.

    1. Run:
      system-view
      The system view is displayed.
    2. Run:
      mpls p2mp fast-switch enable
      Rapid MPLS P2MP switching is enabled.
    3. Run:
      commit
      The configuration is committed.

  • Configure multicast load balancing on a trunk interface.

    1. Run:
      system-view
      The system view is displayed.
    2. To enter the trunk interface view, run either of the following commands:
      • interface eth-trunk trunk-id or interface ip-trunk trunk-id
    3. Run:
      multicast p2mp load-balance enable
      Multicast traffic load balancing is enabled on the trunk interface that functions as an outbound interface on a P2MP tunnel.
    4. Run:
      commit
      The configuration is committed.

  • Configure MPLS P2MP load balancing.

    1. Run:
      system-view
      The system view is displayed.
    2. Run:
      mpls p2mp force-loadbalance enable
      MPLS P2MP load balancing is enabled globally.
    3. Run:
      commit
      The configuration is committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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