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Configuration Guide - MPLS

S7700 and S9700 V200R010C00

This document describes MPLS configurations supported by the switch, including the principle and configuration procedures of static LSPs, MPLS LDP, MPLS TE, MPLS QoS, MPLS OAM, Seamless MPLS, and MPLS common features, and provides configuration examples.
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Configuration Overview

Configuration Overview

Applicable Environment

MPLS OAM can detect an ordinary LSP and a TE LSP. Before configuring MPLS OAM, an LSP must be configured. This section describes the applicable environment, pre-configuration tasks, data preparation, and configuration procedure of configuring MPLS OAM detection.

The switches provide MPLS OAM to detect the connectivity of a Resource Reservation Protocol TE (RSVP-TE) LSP, a static constraint-based routing LSP (CR-LSP), or a static LSP.

To implement MPLS OAM detection, create a reverse LSP for bearing BDI packets. The type of the reverse LSP can be different from that of the tested LSP, but the reverse LSP must be bound to a TE tunnel.

Pre-configuration Tasks

Before configuring basic MPLS OAM functions for LSP, complete the following tasks:

  • Configure basic MPLS functions.

  • Create a forward LSP (the LSP is detected by OAM, and bound to the TE tunnel).

  • Create a reverse LSP.


If the forward LSP is static and the reverse LSP is dynamic and in shared mode, specify lsrid ingress-lsr-id and tunnel-id tunnel-id when creating a forward LSP with the static-lsp egress or static-cr-lsp egress command. For details on how to create the LSP bound to a TE tunnel, see "MPLS TE Configuration."

Data Preparation

Prepare the following information before configuring basic MPLS OAM functions.




Ingress: Tunnel interface number of the detected LSP


(Optional) Ingress: reverse tunnel
  • If a static LSP or a static CR-LSP acts as the reverse tunnel, the name of the static LSP or the static CR-LSP is required.
  • If a dynamic LSP (RSVP-TE LSP) acts as the reverse tunnel, the LSR ID and tunnel ID are required.


Egress: Tunnel interface number of the reverse LSP and protection mode


Egress: detected LSP
  • If a static LSP or a static CR-LSP is to be detected, the name of the LSP, LSR ID, and tunnel ID are required.
  • If a dynamic LSP (RSVP-TE LSP) is to be detected, the LSR ID and tunnel ID are required.


(Optional) MPLS OAM parameters
  • On the ingress: detection type, frequency of FFD packet transmission, and priority of the detection packet
  • On the egress: detection type, frequency of FFD packet transmission, status of the auto protocol (enabled or disabled), timeout period of the auto protocol, and frequency of BDI packet transmission
  • The reverse LSP must be specified on the egress. Otherwise, BDI packets cannot be correctly sent to the source end.

  • If a shared reverse LSP is used, do not specify the reverse LSP on the ingress.

Updated: 2019-04-18

Document ID: EDOC1000141902

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