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VPRN Labels

Author: gokhankosem, on 17 Oct 17 - 0 Comments
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VPRN Labels

VPRN is an IP/MPLS Layer 3 VPN Service. So, it uses the same Labels used in IP/MPLS. In MPLS and VPLS articles we have talked about MPLS Labels. Here, we will explain these Labels again for VPRN Service too.

vprn-mpls-labels

Basically, VPRN uses two MPLS labels. These MPLS labels are:

• Outer Label (Transport, LSP Label)
• Inner Label (Service, VPN Label)

Outher Label is the Transport/LSP Label. Swap process is done with this label in the Service Provider Network. In each hop, it is changed.This label is used for used in end-to-end LSPs. So it is also called LSP Labels. And used between PE devices.

Inner Label is the Service/VPN Label. In Service Provider Network it remains unchanged. It is used by PE routers to determine the VPRN service. The other name of this label is VPN Label. It identifies the specific customers and determine the destination of L3 VPN (VPRN) Service.

These Labels are assigned at the PE Router. And in the Service Provider Core, only Outher Label is swapped. At the PEs, according to Service Labels, VPRN Service is determined.


vprn-labels

Do not worry about the names of the labels. To sum up there is only two Labels (can be named differently). One is used between PE devices for transport only, the other is transfered between PEs, but used only on PE devices to determine the VPRN Service.

In the Control and Data Plane Activities, we will talk about these Labels more detailly.You will also see the travel of Labels through the Service Provider Network. You will see, the Labelling steps from Label assigning to the label remove.

To learn more about VPRN, go through the other VPRN articles.

You can continue with other VPRN Articles…

VPRN (Virtual Private Routed Network) – VPRN Overview
VPRN (Virtual Private Routed Network) – VPRN Labels
VPRN (Virtual Private Routed Network) – How Does VPRN Work?
VPRN (Virtual Private Routed Network) – VPRN Control Plane Activities
VPRN (Virtual Private Routed Network) – VPRN Data Plane Activities
VPRN (Virtual Private Routed Network) – Alcatel-Luncet (Nokia) VPRN Configuration

General Alcatel-Lucent (Nokia) 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.

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