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NE40E V800R010C00 Configuration Guide - MPLS 01

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Configuring a GMPLS UNI Tunnel

Configuring a GMPLS UNI Tunnel

An IP network user can configure a GMPLS UNI tunnel on an edge node for interconnection between the IP network and a transport network, quickly deploying new services and saving operation and maintenance costs.

Usage Scenario

GMPLS UNI tunneling technology is applicable to the following scenarios, as shown in Table 6-1.
Table 6-1  Usage scenarios of GMPLS UNI tunneling technology



Rapid service provisioning between the IP and optical layers

A GMPLS UNI tunneling technology is used to quickly deploy new services and implement interconnection between an IP network and a transport network when a new network is constructed. GMPLS UNI tunnels carry various types of IP or MPLS services.

SRLG information sharing between the IP and optical layers

After a GMPLS UNI tunnel is established to connect the IP layer to the optical layer, the ingress EN and CN can advertise SRLG information at the optical layer to all devices at the IP layer. In this situation, when TE FRR or CR-LSP backup is configured at the IP layer, the ingress can use the SRLG information to calculate more accurate backup paths.


Some GMPLS UNI tunnel configurations need to be performed on edge devices on the transport network. This document mainly describes tunnel configurations on IP network devices. For tunnel configurations of transport network edge devices, see the related configuration guide.

Pre-configuration Tasks

Before configuring a GMPLS UNI tunnel, complete the following tasks:

  • Enable MPLS-TE and RSVP-TE globally on the ingress EN and egress EN.

  • (Optional) Configure static routes to ensure that the out-of-band control channel between an IP network and a transport network is reachable at the network layer if the out-of-band mode is used to separate the data channel from the control channel.

  • (Optional) Enable EFM globally if the in-band mode is used to separate the data channel from the control channel.

Configuration Procedures

Either of the following methods can be used to calculate paths for GMPLS UNI tunnels:
  • Independent path calculation at IP and optical layers
  • PCE path calculation for a path crossing the IP and optical layers
Figure 6-1 illustrates path calculation processes using the preceding two methods.
Figure 6-1  GMPLS UNI tunnel configuration
Updated: 2018-07-12

Document ID: EDOC1100028530

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