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VPWS (Virtual Private Wire Service)

VPWS (Virtual Private Wire Service) is Point-to-Point Layer 2 VPN Service of Alcatel-Lucent Service Routers. The other Layer 2 VPN Service is VPLS that will be explaine in the following articles. Here, we will focus on VPWS (Virtual Private Wire Service) .
Below, a logical picture is given for VPWS Service and shows this structure better.


Virtual-Private-Wire-Service

Logical View of VPWS

This general structure shows, VPWS logical structure independant from the used L2 technology and VPWS type.

VPWS (Virtual Private Wire Service) is also called as Virtual Leased Line. It provides Point-to-Point VPN service and from the point of Customer it is like a Leased Line. With VPWS two sites of customer are like directly connected as Point-to-Point.

Alcatel-Lucent,Customer view of VPWS

Customer view of VPWS

As you can see, it is like a connection that connects customer’s different branches.

VPWS service encapsulates the customer data and transports over the service provider’s IP or MPLS network in a GRE or MPLS tunnel.

Above we said that VPWS is a Layer 2 VPN Service. But sometimes VPWS can be defined Layer 1 VPN Service, because there is no MAC learning in this service.

VPWS service offers service for interworking for Ethernet, ATM, Frame-Relay and TDM across a common IP/MPLS network. According to used L2 technology, there are five types of Alcatel-Lucent VPWS Services.

These are :

• Epipe
• Fpipe
• Apipe
• Cpipe
• Ipipe

– Epipe : Epipe is Ethernet Pipe. It is a simple Point-to-Point L2 VPN Ethernet Service between two Ethernet SAPs.

– Fpipe : Fpipe is Frame-Relay Pipe. It is a simple Point-to-Point L2 VPN Frame-Relay Service between two Frame-Relay SAPs.

– Apipe : Apipe is ATM Pipe. It is a simple Point-to-Point L2 VPN ATM Service between two ATM SAPs.

– Cpipe : Cpipe is TDM Pipe. It is a simple Point-to-Point L2 VPN TDM Service between two TDM SAPs.

– Ipipe : Ipipe is Interworking VPWS. It is a simple Point-to-Point L2 VPN Service between two node that has different technologies.

Epipe

Epipe is the VPWS VPN Service of Alcatel-Lucent that is for Ethernet Services. Epipe uses Ethernet SAPs. Epipe Servie is also called “Virtual Leased Line (VLL)”. This is like a Virtual Leased Line for customers.


vpws-epipe

By the way, for Epipe service, there is no need for MAC Learning.

Fpipe

Fpipe is the VPWS VPN Service of Alcatel-Lucent for Frame-Relay. Fpipe uses Frame-Relay SAPs. Here, Frame-Relay PVCs are used between routers.


vpws-fpipe

Apipe

Apipe is the VPWS VPN Service of Alcatel-Lucent for ATM. Apipe uses ATM SAPs. Here, ATM PVCs are used between routers.


vpws-apipe

Cpipe


Cpipe is the VPWS VPN Service of Alcatel-Lucent for TDM. Cpipe uses TDM SAPs. It is a TDM Leased Line.


vpws-cpipe

VPWS (Virtual Private Wire Service) Article Series...
VPWS (Virtual Private Wire Service) - Overview
VPWS (Virtual Private Wire Service) - Local Epipe Configuration
VPWS (Virtual Private Wire Service) - Distributed Epipe Configuration
VPWS (Virtual Private Wire Service) - Fpipe, Apipe and Cpipe Configuration
General VPN Service Articles...
Alcatel-Lucent L2 VPN and L3 VPN Services - Part 1 (Service Terms and  Service Creation Steps)
Alcatel-Lucent L2 VPN and L3 VPN Services - Part 2 (Service Types)
Alcatel-Lucent L2 VPN and L3 VPN Services - Part 3 (Network Preparation)
Alcatel-Lucent L2 VPN and L3 VPN Services - Part 4 (Tunnel Structure)

Ipipe

Ipipe is Interworking VPWS. It is a simple Point-to-Point L2 VPN Service between two node that has different technologies. For example, this can be connect an Ethernet technology to an ATM technology, or a Frame-Relay technology to Ethernet technology etc..


vpws-ipipe

VPWS SAP Encapsulations

SAP encapsulation is used for some important roles. According to Layer 2 technology, there are some different encapsulations types. Let’s talk about these encapsulations.

There are some SAPs encapsulations used in Epipe and Ethernet. These encapsulations and their roles are given below:

• Null
• Dot1q
• Q-in-Q

Null Encapsulation means that this interface can be used for “Single Service” for “Single Customer”.

Dot1q Encapsulation means that this interface can be used for “Multiple Services”for “Multiple Customers”.

Q-in-Q Encapsulation means that this interface can be used to expand VLAN space by tagging tagged packets.

There are also other encapsulation types for SONET. These are :

• SONET/SDH (IPCP)
• SONET/SDH TDM (BCP-null)
• SONET/SDH TDM (BCP-Dot1Q)
• SONET/SDH ATM (ATM)
• SONET/SDH Frame Relay (Frame Relay)

In the following parts, we will focus on VPWS configurations on ALcatel-Lucent Service Routers.

Alcatel-Lucent, Logical View of VPLS

VPWS (Virtual Private Wire Service) Article Series…

VPWS (Virtual Private Wire Service) – Overview
VPWS (Virtual Private Wire Service) – Local Epipe Configuration
VPWS (Virtual Private Wire Service) – Distributed Epipe Configuration
VPWS (Virtual Private Wire Service) – Fpipe, Apipe and Cpipe Configuration

General VPN Service Articles…

Alcatel-Lucent L2 VPN and L3 VPN Services – Part 1 (Service Terms and Service Creation Steps)
Alcatel-Lucent L2 VPN and L3 VPN Services – Part 2 (Service Types)
Alcatel-Lucent L2 VPN and L3 VPN Services – Part 3 (Network Preparation)
Alcatel-Lucent L2 VPN and L3 VPN Services – Part 4 (Tunnel Structure)

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About the Author
Gokhan Kosem is a telecommunation and network engineer. His ambition to IP networks and end-to-end system installation made him to prepare this web-site. By sharing his experiences about various networking protocols beside different system installation experiences and Cisco, Juniper, Alcatel-Lucent devices configurations, he is aimed to be helpful for his collegues in all over the world. He is currently lives in Istanbul, Turkey.

One comment for “VPWS (Virtual Private Wire Service) – Overview”

1
sukhbir Brar

Thanks a lot Sir, Excellent info, Please publish a book…your explanation is so simple its much better than all the cisco authors put together.
Thanks again and lots of blessings to carry on with such a great work:)

September 16th, 2017 at 13:21

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