No relevant resource is found in the selected language.

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies. Read our privacy policy>Search


To have a better experience, please upgrade your IE browser.


Configuration Guide - VPN 01

NE05E and NE08E V300R003C10SPC500

This is NE05E and NE08E V300R003C10SPC500 Configuration Guide - VPN
Rate and give feedback:
Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Overview of VPWS

Overview of VPWS


VPWS is an L2VPN technology that transmits Layer 2 services by simulating the basic behaviors and features of services, such as ATM, Ethernet, low-speed time division multiplexing (TDM) circuits, and synchronous optical network (SONET)/synchronous digital hierarchy (SDH) on a packet switched network (PSN). VPWS emulates the traditional leased line on an IP network and provides asymmetric and low-cost digital data network (DDN) services. For users at both ends of a VPWS connection, the connection is similar to the traditional leased line. VPWS functions as a point-to-point virtual private wire technology that can support almost all the link layer protocols.


As IP networks develop, the expansibility, upgradability, and compatibility of IP networks have been greatly enhanced. Nevertheless, the expansibility, upgradability, and interworking capability of traditional communications networks are relatively poor. Confined by transmission modes and service types, resource sharing among newly constructed communications networks is also poor, complicating interworking management. In the process of upgrading and expanding a traditional communications network, you must determine whether to achieve your goal by constructing more traditional communications networks, or by utilizing existing network resources at your disposal, or by utilizing public network resources. VPWS is a solution that enables traditional communications networks to interwork with existing PSNs.


VPWS offers the following benefits:

  • Extended network functions and service capabilities

    Carriers can provide MPLS L2VPN services by using only one network. In addition, carriers can use enhanced MPLS-related technologies, such as traffic engineering (TE) and quality of service (QoS), to provide users with different classes of services to meet their requirements.

  • Higher scalability

    On an ATM network where MPLS is not enabled, virtual circuits (VCs) are used to provide the L2VPN service. For each VC, both the PE and provider (P) devices on the network need to maintain complete VC information. That means that when the PEs of a carrier connect to multiple CEs, multiple VCs are required, and information about multiple VCs must be maintained on both PEs and Ps. VPWS uses label stacking to multiplex multiple VCs on a label switched path (LSP). As a result, Ps only need to maintain information about one LSP. This improves the scalability of a system.

  • Well-defined administration roles

    On a VPWS network, a carrier provides only Layer 2 connectivity and users are responsible for Layer 3 connectivity, such as routing. This implementation prevents route flapping caused by incorrect configurations from affecting the stability of the carrier's network.

  • Support for multiple protocols

    Carriers provide only Layer 2 connections, whereas users can use any Layer 3 protocol, such as IPv4 and IPv6.

  • Smooth network upgrade

    The VPWS network is transparent to users. When a carrier upgrades the network from a traditional L2VPN, such as an ATM network, to a VPWS network, users do not need to perform any configuration. The network upgrade does not affect user services, except for data loss for a short period during the network cutover.

Updated: 2019-01-14

Document ID: EDOC1100058925

Views: 37101

Downloads: 61

Average rating:
This Document Applies to these Products
Related Documents
Related Version
Previous Next