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NE40E V800R010C00 Configuration Guide - MPLS 01

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Configuring an MPLS TE Explicit Path

Configuring an MPLS TE Explicit Path

An explicit path is configured on the ingress of an MPLS TE tunnel to define the nodes through which the MPLS TE tunnel passes and the nodes that are excluded from the MPLS TE tunnel.

Context

An explicit path consists of a series of nodes. These nodes are arranged in sequence and form a vector path. An IP address for an explicit path is an interface IP address on every node. The loopback IP address of the egress node is used as the destination address of an explicit path.

Two adjacent nodes on an explicit path are connected in either of the following modes:

  • Strict: A hop is directly connected to its next hop.

  • Loose: Other nodes may exist between a hop and its next hop.

The strict and loose modes can be used simultaneously.

TE tunnels are classified into the following types:

  • Intra-area tunnel: A TE tunnel is in a single OSPF or IS-IS area, but not in an autonomous system (AS) running the Border Gateway Protocol (BGP).

  • Inter-area tunnel: A TE tunnel traverses multiple OSPF or IS-IS areas, but not BGP ASs.

A strict explicit path is used to establish an inter-area TE tunnel, on which a next hop can only be an area border router (ABR) or an autonomous system boundary router (ASBR).

Procedure

  1. Run:

    system-view

    The system view is displayed.

  2. Run:

    explicit-path path-name

    An explicit path is created and the explicit path view is displayed.

  3. Run:

    next hop ip-address [ include [ [ strict | loose ] | [ incoming | outgoing ] ] * | exclude ]

    The next-hop address is specified for the explicit path.

    The include parameter indicates that the tunnel does pass through a specified node; the exclude parameter indicates that the tunnel does not pass through a specified node.

  4. (Optional) Run:

    add hop ip-address1 [ include [ [ strict | loose ] | [ incoming | outgoing ] ] * | exclude ] { after | before } ip-address2

    A node is added to the explicit path.

  5. (Optional) Run:

    modify hop ip-address1 ip-address2 [ include [ [ strict | loose ] | [ incoming | outgoing ] ] * | exclude ]

    The address of a node on an explicit path is changed.

  6. (Optional) Run:

    delete hop ip-address

    A node is removed from an explicit path.

  7. (Optional) Run:

    list hop [ ip-address ]

    Information about nodes on an explicit path is displayed.

  8. Run:

    commit

    The configurations are committed.

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Updated: 2018-07-12

Document ID: EDOC1100028530

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