Virtual Subnet: A L3VPN-based Subnet Extension Solution
This document describes a Layer3 Virtual Private Network (L3VPN)- based subnet extension solution referred to as Virtual Subnet, which mainly reuses existing Border Gateway Protocol (BGP)/Multi-Protocol Label Switch (MPLS) IP Virtual Private Network (VPN)[RFC4364] and Address Resolution Protocol(ARP)/Neighbor Discovery (ND) proxy [RFC925][RFC1027][RFC4389]technologies. Virtual Subnet provides a scalable approach for interconnecting cloud data centers.