IP-VPN Lite
Encyclopedia
IP VPN-Lite is a product from Nortel
(now acquired by Avaya
) that provides the ability to run IP
Virtual private network
s 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 leveraging 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:
Nortel
Nortel Networks Corporation, formerly known as Northern Telecom Limited and sometimes known simply as Nortel, was a multinational telecommunications equipment manufacturer headquartered in Mississauga, Ontario, Canada...
(now acquired by Avaya
Avaya
Avaya Inc. is a privately held computer networking, information technology and telecommunications company that is a global provider of business communications systems. The international head quarters is in Basking Ridge, New Jersey, United States...
) that provides the ability to run IP
Internet Protocol
The Internet Protocol is the principal communications protocol used for relaying datagrams across an internetwork using the Internet Protocol Suite...
Virtual private network
Virtual private network
A virtual private network is a network that uses primarily public telecommunication infrastructure, such as the Internet, to provide remote offices or traveling users access to a central organizational network....
s using Multiprotocol BGP
Border Gateway Protocol
The Border Gateway Protocol is the protocol backing the core routing decisions on the Internet. It maintains a table of IP networks or 'prefixes' which designate network reachability among autonomous systems . It is described as a path vector protocol...
(MP-BGP) extensions (based on RFC 4364) across a normal IP backbone infrastructure. Unlike Multiprotocol Label Switching
Multiprotocol Label Switching
Multiprotocol Label Switching is a mechanism in high-performance telecommunications networks that directs data from one network node to the next based on short path labels rather than long network addresses, avoiding complex lookups in a routing table. The labels identify virtual links between...
(MPLS) based VPNs, IP VPN-Lite is purely based on an end-to-end IP transport.
While still leveraging 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
IP in IP
IP in IP is an IP tunneling protocol that encapsulates one IP packet in another IP packet. To encapsulate an IP packet in another IP packet, an outer header is added with SourceIP, the entry point of the tunnel and the Destination point, the exit point of the tunnel. While doing this the inner...
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
VRF
In IP-based computer networks, Virtual Routing and Forwarding is a technology that allows multiple instances of a routing table to co-exist within the same router at the same time...
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 reflectionRoute reflectorA route reflector is a network routing component. It offers an alternative to the logical full-mesh requirement of internal border gateway protocol . An RR acts as a focal point for IBGP sessions. The purpose of the RR is concentration...
- 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 routingEqual-cost multi-path routingEqual-cost multi-path routing is a routing strategy where next-hop packet forwarding to a single destination can occur over multiple "best paths" which tie for top place in routing metric calculations. Multipath routing can be used in conjunction with most routing protocols, since it is a per-hop...
- VRF-based ping and traceroute
- UNI packet classification (port, VLAN, IP, VRF, and VPN)
- VRF UNI routing protocols (RIPRouting Information ProtocolThe Routing Information Protocol is a distance-vector routing protocol, which employs the hop count as a routing metric. RIP prevents routing loops by implementing a limit on the number of hops allowed in a path from the source to a destination. The maximum number of hops allowed for RIP is 15....
, OSPFOpen Shortest Path FirstOpen Shortest Path First is an adaptive routing protocol for Internet Protocol networks. It uses a link state routing algorithm and falls into the group of interior routing protocols, operating within a single autonomous system . It is defined as OSPF Version 2 in RFC 2328 for IPv4...
, EBGP)
External links
- Ethernet Routing Switch 8600] -Retrieved 29 July 2011