Concept: Automatic per VPN Layer-2 Backdoor Link

Provider Edge Router (PE1)

Backbone

BGP

BGP

BGP

BGP UPDATE

BGP

UPDATE

(1:1 X.121-FR, PE-BVR1)

Provider Edge Router (PE2)

BVR

BVR

VPN-ID=1:1

VPN-ID=1:2

VPN-ID=1:3

VPN-ID=1:1

VPN-ID=1:2

VPN-ID=1:3

Layer-2 connection

(e.g., FR connection)

Example of use: Backbone MPLS/IP over FR/ATM, Recovery, etc.

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