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Configuration Guide - VPN

S9300, S9300E, and S9300X V200R010C00

This document describes the VPN configuration procedures and provides configuration examples.

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Extensions to the Control Plane

Extensions to the Control Plane

Signaling Extension

PWE3 advertises the PW status using LDP signaling Notification messages. A PW is torn down only when PW configurations are deleted or the LDP session is interrupted. PWE3 reduces control packets exchanged between PEs and signaling costs. LDP signaling used by PWE3 is compatible with common LDP and Martini.

Multi-Segment Extension

Multi-segment PWE3 extends networking modes.

  • Multi-segment PWE3 has low requirements for the number of LDP sessions supported by an access device. That is, the costs of LDP sessions on the access device are reduced.

  • The access node on a multi-segment PW provides PW aggregation. This allows for more flexible networking and easily divides a network into access, aggregation, and core layers.

TDM Interface Extension

PWE3 supports more low-speed Time Division Multiplexing (TDM) interfaces. PWE3 supports packet sequencing, clock extraction, and clock synchronization using the Real-time Transport Protocol (RTP) on the forwarding plane and the control word.

PWE3 has the following advantages by supporting low-speed TDM interfaces:

  • Adds encapsulation types (packets on low-speed TDM interfaces can be encapsulated).

  • Integrates the PSTN, TV, and data networks.

  • Substitutes the traditional Digital Data Network (DDN) service.

Other Extensions

PWE3 has the following extensions at the control plane:

  • Fragmentation negotiation mechanism

  • PW connectivity detection, such as VCCV and OAM, which speeds up network convergence and enhances network reliability

Updated: 2019-12-31

Document ID: EDOC1000142068

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