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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 P2MP TE Tunnel Interface

Configuring a P2MP TE Tunnel Interface

Configuring a tunnel interface on an ingress helps you to manage and maintain the P2MP TE tunnel.

Context

A P2MP TE tunnel is established by binding multiple sub-LSPs to a P2MP TE tunnel interface. A network administrator configures a tunnel interface to manage and maintain the tunnel. After a tunnel interface is configured on an ingress, the ingress sends signaling packets to all leaf nodes to establish a tunnel.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface tunnel tunnel-number

    A tunnel interface is created, and the tunnel interface view is displayed.

  3. Run either of the following commands to assign an IP address to the tunnel interface:

    • Run ip address ip-address { mask | mask-length } [ sub ]

      An IP address is assigned to the tunnel interface.

    • Run ip address unnumbered interface interface-type interface-number

      The tunnel interface is allowed to borrow the IP address of a specified interface.

    A tunnel interface must obtain an IP address before it can forward traffic. An MPLS TE tunnel is unidirectional and does not need a peer address. Therefore, there is no need to specifically configure an IP address for the tunnel interface. A TE tunnel interface usually uses the ingress LSR ID as its IP address.

  4. Run tunnel-protocol mpls te

    MPLS TE is configured as a tunnel protocol.

  5. Run mpls te p2mp-mode

    A P2MP TE tunnel is established.

  6. Run mpls te tunnel-id tunnel-id

    A tunnel ID is set.

  7. Run mpls te leaf-list leaf-list-name

    A leaf list is specified for the P2MP TE tunnel.

  8. (Optional) Perform the following operations to set other tunnel attributes as needed:

    Table 3-5 Operations

    Operation

    Description

    Run mpls te bandwidth ct0 ct0-bw-value

    The bandwidth is configured for the tunnel.

    • A P2MP TE tunnel is established to provide sufficient network bandwidth for multicast services. Therefore, set the bandwidth value.
    • The bandwidth used by the tunnel cannot be higher than the maximum reservable link bandwidth.

    • Ignore this step if the TE tunnel is used only for changing the data transmission path.

    Run mpls te record-route [ label ]

    The route and label recording function is enabled.

    This step enables nodes along a P2MP TE tunnel to use RSVP messages to record detailed P2MP TE tunnel information, including the IP address of each hop. The label parameter in the record-route command enables RSVP messages to record label values.

    Run mpls te resv-style { se | ff }

    A resource reservation style is specified.

    -

    Run mpls te path metric-type { igp | te }

    A link metric type used to select links is specified.

    -

    Run mpls te affinity propertyy properties [ mask mask-value ]

    An affinity and its mask are specified.

    An affinity is a 32-bit vector value used to describe an MPLS link. An affinity and an administrative group attribute define the nodes through which an MPLS TE tunnel passes. Affinity masks determine the link properties that a device must check. If some bits in the mask are 1, at least one bit in an administrative group is 1, and the corresponding bit in the affinity must be 1. If the bits in the affinity are 0s, the corresponding bits in the administrative group cannot be 1.

    You can use an affinity to control the nodes through which a manual P2MP TE tunnel passes.

    Run mpls te hop-limit hop-limit-value

    The hop limit is set for sub-LSPs on the TE tunnel.

    The mpls te hop-limit command sets the maximum number of hops that each sub-LSP in a P2MP TE tunnel supports.

    Run mpls te tie-breaking { least-fill | most-fill | random

    A rule for selecting a route among multiple routes to the same destination is specified.

    -

    Run mpls te priority setup-priority [ hold-priority ]

    The priorities of the tunnel are set.

    The setup priority of a tunnel must be no higher than its holding priority. A setup priority value must be greater than or equal to a holding priority value.

    If resources are insufficient, setting the setup and holding priority values allows LSPs with lower priorities to release resources for establishing LSPs with higher priorities.

    Run mpls te reoptimization [ frequency interval ]

    Periodic re-optimization is enabled for a manual P2MP TE Tunnel.

    Periodic re-optimization allows a P2MP TE tunnel to be automatically reestablished over a better path. After a better path to the same destination has been calculated for a certain reason, such as a cost change, a TE tunnel will be automatically reestablished, optimizing resources on a network.

    Run mpls te lsp-tp outbound

    Traffic policing is enabled for a manual P2MP TE tunnel.

    Physical links over which a P2MP TE tunnel is established transmit traffic of other TE tunnels, traffic of non-CR LSP traffic, or even IP traffic, in addition to TE tunnel traffic. To limit TE traffic within a configured bandwidth range, run the mpls te lsp-tp outbound command.

  9. (Optional) Run cspf disable

    CSPF is disabled in the P2MP template.

    NOTE:

    In an inter-domain scenario, this command is run if NG MVP triggers the creation of a dynamic P2MP tunnel and a loose explicit path is configured in a P2MP template. Do not run this command in the other situations.

  10. Run commit

    The configuration is committed.

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Updated: 2019-01-03

Document ID: EDOC1100055103

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