National Chi Nan University A Brief Introduction to

National Chi Nan University A Brief Introduction to LISP ( Locator/ID Separation Protocol ) Speaker: Dennis (Shu-Cheng Li)

Outline • • Introduction Definition of terms Overview Mapping Header Format Use Cases Conclusion 2 National Chi Nan University

Introduction Cont. • 為了解決上述議題，許多研究單提出ID與Locator 分離的概念 – – – AKARI Project ITU-T Study Group 13 Locator/ID Separation Protocol (LISP) Host Identity Protocol (HIP) SHIM 6 • 其中LISP技術的特色是考量現有的網路架構下去設 計的，並且已經實作在Cisco Router上 4 National Chi Nan University

Definition of terms • Ingress Tunnel Router(ITR) – An ITR is a LISP site edge device that receives packets from site facing interface and encapsulates them to remote LISP sites. • Egress Tunnel Router(ETR) – An ITR is a LISP site edge device that receives packets from core facing interface and deencapsulates LISP packets and delivers them to local EIDs at the site. 5 National Chi Nan University

Definition of terms Cont. • Map Server(MS) – A MS is a device that ETRs register to with their EID prefixes. The MS advertises aggregates for the registered EID prefixes in to the LISP mapping system. • Map Resolver(MR) – A MR is a device that ITRs send LISP map request queries when resolving EID to RLOC mappings. 6 National Chi Nan University

LISP Overview 7 National Chi Nan University

LISP Overview Cont. 8 National Chi Nan University

LISP Forwarding 9 National Chi Nan University

Mapping Lookup 10 National Chi Nan University

Mapping Mechanism 映射系統 LISP-NERD LISP-ALT LISP-DHT LISP-FIRMS 映射資訊的存取模式 Push Pull Hybrid Overlay Network 架構 Flat Hierarchy 所需儲存的映射資訊量 多 少 少 中 查詢延遲 低 中 中 低 更新延遲 高 低 低 高 11 National Chi Nan University

LISP-ALT 12 National Chi Nan University

LISP Header Format 13 National Chi Nan University

LISP Header Format Cont. 14 National Chi Nan University

LISP Use Cases • • • 1. Efficient Multi-Homing 2. IPv 6 Transition Support 3. Data Center/VM Mobility 4. Efficient Virtualization/Multi-Tenancy 5. LISP Mobile-Node 15 National Chi Nan University

IPv 6 Transition Support 16 National Chi Nan University

LISP Mobile-Node 17 National Chi Nan University

LISP Summary 18 National Chi Nan University

Conclusion • It does not require extra hardware and hence, the cost of implementation will be very less. Also, since no new hardware is required, the transition can be very smooth. • There is more flexibility in the network. • The number of addresses that needs to be advertised is low too. • The overhead will increase with new headers getting appended to the messages that will 19 impact packet processing. National Chi Nan University

Reference • [1]Alantalkstech, Locator ID Seperation Protocol (LISP) transition to IPv 6, http: //www. youtube. com/watch? v=8 Au. Lm. TC 5 YJs • [2]IETF Vancouver, Locator/ID Separation Protocol (LISP) Tutorial, http: //www. ietf. org/proceedings/70/slides/RRG 7. pdf, December 2007 • [3]Cisco, Locator/ID Separation Protocol Overview, http: //lisp. cisco. com/LISP_Overview. pdf, August 2011 • [4] VARUN JAIN, A STUDY OF LOCATOR ID SEPARATION PROTOCOL, Unpublished doctoral dissertation, University of Missouri--Kansas City, 2010 20 National Chi Nan University