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NE20E-S V800R010C10SPC500 Configuration Guide - MPLS 01

This is NE20E-S V800R010C10SPC500 Configuration Guide - MPLS
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Configuring LDP over TE

Configuring LDP over TE

The LDP over TE function applies to the network on which core devices support TE, whereas edge devices support LDP. A TE tunnel functions as one hop of the entire LDP LSP.

Usage Scenario

LDP over TE is a technique used to establish LDP LSPs established across an RSVP TE domain and provide services for a VPN. To deploy MPLS TE on a network transmitting VPN services, a carrier has difficulties in deploying TE on an entire network. The carrier can plan a core area in which TE is deployed, and implement LDP on PEs on the edge of the TE area.

NOTE:

In an LDP over TE scenario, configure a maximum of 8K LSPs. If the number of LSPs exceeds this upper limit, some LDP over TE services will become unavailable.

Pre-configuration Tasks

Before configuring LDP over TE, complete the following tasks:

  • Configure an IGP to ensure connectivity between LSRs on the network layer.

  • Enable MPLS on each LSR and interface.

  • Enable MPLS LDP on each LSR on the edge of the TE area and each interface outside the TE area.

  • Establish an RSVP-TE tunnel along the TE nodes.

  • Assign an IP address to the tunnel and configure IGP to advertise the route.

  • Configure virtual TE interfaces.

Configuration Procedures

Figure 4-11 LDP over TE configuration
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Updated: 2019-01-03

Document ID: EDOC1100055103

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