Why do current IP semantics cause scaling issues? −Today, “addressing follows topology,” which limits route aggregation compactness −Overloaded IP address.

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Presentation transcript:

Why do current IP semantics cause scaling issues? −Today, “addressing follows topology,” which limits route aggregation compactness −Overloaded IP address semantic makes efficient routing impossible −IPv6 does not fix this “… routing scalability is the most important problem facing the Internet today and must be solved … ” Internet Architecture Board (IAB) October 2006 Workshop (RFC 4984)

 The current IP routing and addressing architecture uses a single numbering space, the IP address, to simultaneously express two functions about a device: its identity how / where its is attached to the network  The Locator ID Separation Protocol (LISP) creates a new paradigm by splitting the device identity, or the endpoint identifier (EID) and its location, or its routing locator (RLOC) into two different numbering spaces.  LISP requires no hardware / software changes to hosts is incrementally deployable in the network infrastructure is a simple, open standard protocol (IETF)

LISP creates a Level of indirection with two namespaces: EID and RLOC  EID (Endpoint Identifier) is the IP address of a host – just as it is today  RLOC (Routing Locator) is the IP address of the LISP router for the host  EID-to-RLOC mapping is the distributed architecture that maps EIDs to RLOCs  Network-based solution  No host changes  Minimal configuration  Incrementally deployable  Support for mobility  Address Family agnostic  Network-based solution  No host changes  Minimal configuration  Incrementally deployable  Support for mobility  Address Family agnostic

S1 S2 TR S Provider A /8 Provider B /8 Provider X /8 Provider Y /8 LISP Site Mapping System MR MS LISP Site Legend: EIDs -> Green Locators -> Red Physical link Legend: EIDs -> Green Locators -> Red Physical link > LISP Map-Register (udp 4342) SHA / , LISP-MN Control Plane Map-Registration PI EID-prefix /24 PI EID-prefix /24 LISP-MN EID /32 LISP-MN EID /

S1 S2 TR S Provider A /8 Provider B /8 Provider X /8 Provider Y /8 LISP Site Mapping System MR MS LISP Site Legend: EIDs -> Green Locators -> Red Physical link Legend: EIDs -> Green Locators -> Red Physical link LISP-MN Control Plane Map-Request PI EID-prefix /24 PI EID-prefix /24 LISP-MN EID /32 LISP-MN EID /32 DNS entry: D.abc.com A DNS entry: D.abc.com A How do I get to ? > Map-Request (udp 4342) nonce > LISP ECM (udp 4342) [1] [2] [3] [4] > Map-Request (udp 4342) nonce >

S1 S2 TR S Provider A /8 Provider B /8 Provider X /8 Provider Y /8 LISP Site Mapping System MR MS LISP Site Legend: EIDs -> Green Locators -> Red Physical link Legend: EIDs -> Green Locators -> Red Physical link LISP-MN Control Plane Map-Reply PI EID-prefix /24 PI EID-prefix /24 LISP-MN EID /32 LISP-MN EID / > Map-Reply (udp 4342) nonce / [1, 50] [1, 50] [6] EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) Mapping Entry

S1S2 TR S Provider A /8 Provider B /8 Provider X /8 Provider Y /8 LISP Site Mapping System MR MS LISP Site LISP-MN Data Plane Unicast Packet Forwarding PI EID-prefix /24 PI EID-prefix /24 LISP-MN EID /32 LISP-MN EID / This policy controlled by destination site DNS entry: D.abc.com A DNS entry: D.abc.com A EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) Mapping Entry > > > > Legend: EIDs -> Green Locators -> Red Physical link Legend: EIDs -> Green Locators -> Red Physical link

BR S Provider B /8 Provider X /8 Provider Y /8 Mapping System MS LISP-MN Data Plane Inter-networking with non-LISP sites Non-LISP site /24 Non-LISP site /24 LISP-MN EID /32 LISP-MN EID /32 PxTR EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) EID-prefix: /32 Locator-set: , priority: 1, weight: 50 (D1) , priority: 1, weight: 50 (D2) Mapping Entry BGP Announcement: /24 Map-Request Map-Reply Map-Request Map-Reply

 LISPmob is an open-source implementation of LISP-MN  Linux (kernels and 3.0.0)  Compliant with latest draft  Inter-operability tests with reference LISP implementations (NX-OS, IOS)  LISPmob features  Mobility Multihoming: Multiple interfaces per node Full IPv6 support: IPv4-over-IPv6 or IPv6-over-IPv4

Desktop/Servers Smartphones (Android) Embeded devices (OpenWRT)