Proxy ITR (PITR): A PITR is used for inter-networking between Non-LISP and LISP sites, a PITR acts like an ITR but does so on behalf of non-LISP sites which send packets to destinations at LISP sites.A PETR is typically used when a LISP site needs to send traffic to non-LISP sites but the LISP site is connected through a service provider that does not accept nonroutable EIDs as packet sources. Proxy ETR (PETR): A LISP PETR implements ETR functions on behalf of non-LISP sites.Ingress Tunnel Router (ITR): An ITR is a device that is the tunnel start point it receives IP packets from site end-systems on one side and sends LISP-encapsulated IP packets, across the Internet to an ETR, on the other side.ETR functionality does not have to be limited to a router device server host can be the endpoint of a LISP tunnel as well. Egress Tunnel Router (ETR): An ETR is a device that is the tunnel endpoint it accepts an IP packet where the destination address in the "outer" IP header is one of its own RLOCs.Endpoint ID (EID): An EID is an IPv4 or IPv6 address used in the source and destination address fields of the first (most inner) LISP header of a packet.A RLOC is the output of an EID-to-RLOC mapping lookup. Routing Locator (RLOC): A RLOC is an IPv4 or IPv6 address of an egress tunnel router (ETR).The LISP workgroup started to move the core specifications onto the standards track in 2017 - as of June 2021 three revisions (for RFC 6830, RFC 6833, and 8113) are ready for publication as RFCs, but they await completion of work on a revision of RFC 6834 and the LISP Security Framework. As of 2016, the LISP specifications are on the experimental track. IETF has an active workgroup establishing standards for LISP. High availability for seamless communication sessions through (constraint-based) multihomingĪ recent discussion of several LISP use cases may be found in.Customer operated encrypted VPN based on LISP/GETVPN replacing IPsec scalability problems.Customer driven VPN provisioning replacing MPLS-VPN.Address family traversal: IPv4 over IPv4, IPv4 over IPv6, IPv6 over IPv6, IPv6 over IPv4.BGP-free multihoming in active-active configuration.
There are several advantages to decoupling Location and Identifier, and to LISP specifically.
1.1 Current Internet Protocol Architecture.