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VPRN Data Plane Activities

Author: gokhankosem, on 17 Oct 17 - 0 Comments
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VPRN Data Plane Activities

VPRN Data Plane is the place that the traffic is sent and received generally. As we mentioned before, CE devices are the devices that are not MPLS capable.They do not know labels. So, they send the data to the PE device as unlabeled.

vprn-data-plane-operation

PE router get this packet and add a pre-determined VPN (Inner) Label to each packet. This PE router has learned this VPN Label via MP-BGP before. PE router also add a Transport (Outher) Label to the packet. This is learned via LDP. This processes are “Push Process” of MPLS Labelling.

vprn-data-plane-labelling

Here, there is a Label Stack and this label stack consist of Transport (Outher) and VPN (Inner) Labels. This is the beginning point of the Layer 3 VPN Service path, LSP.

P routers exchange only the Outher Label of the packet between them. This is “Swap Process” of MPLS Labelling. They exchange the packets according to the packet destination., the destination PE.

l3-vpn-data-plane

vprn-data-plane

When the packet reaches to the destination PE, firstly Other Label is removed and with VPN Label, the destination VPRN is determined. Here is the end of LSP. VPN Label is also removed. This Label removing is the “Pop Process” of MPLS Labelling. Latly, unlabeled packet is sent to the CE device.

vprn-data-plane-process

This is basically VPRN Data Plane Operation. The main aim is forwarding data. So, this Data Plane is also called Forwarding Plane in VPRN.

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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