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IP-VPN Lite
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IP VPN-Lite is a product from Nortel (now acquired by Avaya) that provides the ability to run IP Virtual private networks using Multiprotocol BGP (MP-BGP) extensions (based on RFC 4364) across a normal IP backbone infrastructure. Unlike Multiprotocol Label Switching (MPLS) based VPNs, IP VPN-Lite is purely based on an end-to-end IP transport. While still using the RFC 4364 framework at the control plane level, IP VPN-Lite delivers the same IP VPN capabilities over a IP routed backbone using simple IP in IP encapsulation. IP VPN-Lite differs from RFC 4364 MP-IBGP control plane by using a service IP address instead of a MPLS service label. The service IP address identifies a VRF on a per node basis and is used to carry the VPN traffic across the backbone as part of the outer IP header of the IP in IP encapsulation. For end-to-end transport, the service IP addresses are used to identify the source and destination VRFs which form the VPN. Overall, IP VPN-Lite provides support for the following: * Filtering support (UNI side) * MP-BGP extensions * BGP route refresh * BGP route reflection * Peering to multiple route reflectors * Route reflection server (NNI side) * Full mesh and hub and spoke designs * Extended community Type 0 and 1 * Import and export route targets and route distinguishers * IP-BGP extensions * Equal-cost multi-path routing * VRF-based ping and traceroute * UNI packet classification (port, VLAN, IP, VRF, and VPN) * VRF UNI routing protocols (RIP, OSPF, EBGP) 
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