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AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R010 CLI-based Configuration Guide - MPLS

This document describes MPLS features on the device and provides configuration procedures and configuration examples.

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Creating Static LSPs

Creating Static LSPs

Pre-configuration Tasks

Before creating static LSPs, configure a static unicast route or an IGP to connect LSRs at the network layer.

Configuration Process

Create static LSPs according to the following sequence.

Configuring LSR ID

Context

An LSR ID identifies an LSR on a network. An LSR does not have the default LSR ID, and you must configure an LSR ID for it. To enhance network reliability, you are advised to use the IP address of a loopback interface on the LSR as the LSR ID.

Perform the following steps on each node in an MPLS domain.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run mpls lsr-id lsr-id

    The LSR ID of the local node is configured.

    By default, no LSR ID is set.

Follow-up Procedure

Before changing the configured LSP ID, run the undo mpls command in the system view.

Running the undo mpls command to delete all MPLS configurations will interrupt MPLS services, so plan the LSR ID of each LSP uniformly to prevent LSR ID change.

Enabling MPLS

Context

Perform the following steps on each LSR in an MPLS domain:

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run mpls

    MPLS is enabled globally and the MPLS view is displayed.

    By default, no node is enabled with MPLS.

  3. Run quit

    Return to the system view.

  4. Run interface interface-type interface-number

    The interface to participate in MPLS forwarding is specified.

  5. Run mpls

    MPLS is enabled on the interface.

    By default, no interface is enabled with MPLS.

Establishing a Static LSP

Context

Static LSPs and static Constraint-based Routed LSPs (CR-LSPs) share the same label space (16-1023). Note that the value of the outgoing label of the previous node is equal to the value of the incoming label of the next node.

Perform the following operations on the ingress, transit, and egress nodes of the static LSP. Figure 2-2 shows planned labels.

Figure 2-2  Networking of establishing a static LSP

Procedure

  1. Configure the ingress node.
    1. Run system-view

      The system view is displayed.

    2. Run static-lsp ingress lsp-name destination ip-address { mask-length | mask } { nexthop next-hop-address | outgoing-interface interface-type interface-number } * out-label out-label

      The local node is configured as the ingress node of a specified LSP.

      You are advised to set up a static LSP by specifying a next hop. Ensure that the local routing table contains the route entries, including the destination IP address and the next hop IP addresses of the LSP to be set up.

      If an Ethernet interface is used as an outbound interface of an LSP, the nexthop next-hop-address parameter must be configured.

      As shown in Figure 2-2, the LSP name is LSP1, destination address is 3.3.3.9/32, next hop address is 172.16.1.2, outbound interface is GigabitEthernet0/0/1, and outgoing label is 100.

  2. Configure the transit node.
    1. Run system-view

      The system view is displayed.

    2. Run static-lsp transit lsp-name incoming-interface interface-type interface-number in-label in-label { nexthop next-hop-address | outgoing-interface interface-type interface-number } * out-label out-label

      The local node is configured as the transit node of a specified LSP.

      You are advised to set up a static LSP by specifying a next hop address. In addition, ensure that the local routing table contains the route entries, including the destination IP address and the next hop IP address of the LSP to be set up.

      If an Ethernet interface is used as an outbound interface of an LSP, the nexthop next-hop-address parameter must be configured.

      As shown in Figure 2-2, the LSP name is LSP1, the inbound interface is GigabitEthernet0/0/1, incoming label is 100, next hop address is 172.17.1.2, outbound interface is GigabitEthernet0/0/2, and outgoing label is 200.

  3. Configure the egress node.
    1. Run system-view

      The system view is displayed.

    2. Run static-lsp egress lsp-name incoming-interface interface-type interface-number in-label in-label [ lsrid ingress-lsr-id tunnel-id tunnel-id ]

      The local node is configured as the egress node of a specified LSP.

      As shown in Figure 2-2, the LSP name is LSP1, the inbound interface is GigabitEthernet0/0/1, and incoming label is 200.

Verifying the Static LSP Configuration

Prerequisites

The configurations of the static LSP function are complete.

Procedure

  • Run the display default-parameter mpls management command to check default configurations of the MPLS management module.
  • Run the display mpls static-lsp [ lsp-name ] [ { include | exclude } ip-address mask-length ] [ verbose ] command to check the static LSP.
  • Run the display mpls label static available [ [ label-from label-index ] label-number label-number ] command to check information about labels available for transmitting static services.
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Updated: 2023-08-07

Document ID: EDOC1100034073

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