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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring an Automatic mLDP P2MP Tunnel

Configuring an Automatic mLDP P2MP Tunnel

Automatic mLDP P2MP tunnels can only transmit NG MVPN and multicast VPLS traffic.

Context

There is no need to manually specify leaf nodes before automatic mLDP P2MP tunnels are triggered.

NOTE:

After the configuration is complete, preparation for an automatic mLDP tunnel is ready. Automatic mLDP P2MP tunnels can be established automatically when NG MVPN or multicast VPLS is being deployed.

Procedure

  • Enable mLDP P2MP globally
    1. Run system-view

      The system view is displayed.

    2. Run mpls ldp

      The MPLS-LDP view is displayed.

    3. Run mldp p2mp

      mLDP P2MP is enabled globally.

    4. (Optional) Run mldp make-before-break

      The mLDP make-before-break (MBB) capability is enabled.

      If the optimal route between a non-root node and a root node on an mLDP P2MP network changes, the non-root node re-selects an upstream node and by default tears down the P2MP LSP.As a result, traffic is dropped before a new P2MP LSP is established. To prevent traffic loss, the make-before-break capability can be enabled on the mLDP network. If the optimal route to the root node changes, the non-root node establishes a new P2MP LSP before tearing down the original P2MP LSP, which minimizes traffic loss.

    5. Run commit

      The configuration is committed.

  • (Optional) Disable mLDP P2MP on an interface

    To flexibly control the path of a P2MP LSP, you can disable mLDP P2MP on a specified interface.

    Disabling mLDP P2MP on an interface helps you plan a network. For example, if links balance traffic on a network, to enable P2MP traffic to travel along a specific link, disable mLDP P2MP on interfaces connected to other links.

    1. Run system-view

      The system view is displayed.

    2. Run interface interface-type interface-number

      The interface view is displayed.

    3. Run mpls mldp p2mp disable

      mLDP P2MP is disabled on the interface.

      Disabling mLDP P2MP on an interface causes P2MP LSPs to fail to be established, while does not affect existing P2P LDP sessions.

    4. Run commit

      The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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