isoftwire-5----Page:7
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Packet Forwarding P PE2 PE1 CE2 IFx IFy VIF VIF IFy AFx AFx Encap Decap AFy(AFx) DAFT packet forwarding Encapsulation on ingress PE Transmission of encapsulated packet in Core AF via P routers Decapsulation on egress PE back to the original AF Reuse existing encapsulation technologies GRE [RFC 1702], IP over IP [RFC 2473, 2893], IP over UDP over IP[RFC 3142] Emerging technologies VIF: DAFT virtual interface on PE with an addr in core AF CE1 IFx |