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VPLS Topologies

VPLS can be defined on One Service Router or on Multiple Service Routers. Basically we can divide VPLS into two here.

The first one is VPLS, that is defined on one Service Router of Service Provider, by using router ports only. As Alcatel-Lucent (Nokia) translation, this type of VPLS is done only by using SAPs. This type of VPLS called “Single-Node VPLS”. Here, customer VPLS is in only one Service Provider router. Service provider gives interfaces to the customer. Without going out to the other Service Provider routers, customer benefits from VPLS service.

single-node-vpls

The other is VPLS, that is defined on Multiple Service Routers. This type of VPLS uses both SAPs and SDPs that connect these different Service Routers. This type of VPLS called “Multi-Node VPLS”.With this VPLS, customer benefits VPLS by also using the other PE routers of the Service Provider.

multi-mode-vpls

We can also divide VPLS by the used SDP type.In other words used pseudowire type.

Simply, we can divide Multi-Node VPLS according to used SDP type. Here two type VPLS appear:

• Full-Mesh VPLS ( with Mesh-SDP)
• Hub and Spoke VPLS (with Spoke-SDP)
• Hierarchical VPLS (with Mesh-SDP and Spoke-SDP)

In Full-Mesh VPLS, PE Routers that run this VPLS (L2 VPN Service) are connected via Mesh-SDP.

vpls-topologies-mesh-sdp

In Hub and Spoke VPLS, PE Routers that run this VPLS (L2 VPN Service) are connected via Spoke-SDP.

vpls-topologies-spoke-sdp

In Hierarchical VPLS, Mesh-SDP and Spoke-SDP is used together according to the topology requirements.

vpls-topologies-hierarchical

Other VPLS Articles…

VPLS (Virtual Private LAN Service) – VPLS Overview
VPLS (Virtual Private LAN Service) – VPLS Topologies
VPLS (Virtual Private LAN Service) – VPLS MAC Learning
VPLS (Virtual Private LAN Service) – VPLS Labelling
VPLS (Virtual Private LAN Service) – Alcatel-Lucent(Nokia) VPLS Configuration
VPLS (Virtual Private LAN Service) – (h-VPLS)
VPLS (Virtual Private LAN Service) – VPLS versus h-VPLS
VPLS (Virtual Private LAN Service) – Cisco VPLS Configuration

Alcatel-Lucent L2 VPN and L3 VPN 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.

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