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A management architecture for IP over WDM integration Dr. Fotis Karayannis1, Mr. Lampros Raptis2, Dr. Joan Serrat3, Mr. Giorgos Chatzilias2, Mr. Dimitris Chronis4 1 OTE Consulting S.A., [email protected] 2 National Technical University of Athens, {lraptis, gchatzi}@telecom.ntua.gr 3 Universitat Politècnica de Catalunya, [email protected] 4 Hellenic Telecommunications Organisation SA, [email protected] 15-05-2001 TERENA Networking Conference 2001 1 Rationale • Convergence of voice, data and multimedia services over a unique IP-based network • Requirements of bandwidth and QoS for differentiated services • Requirements of easy service deployment tailored to user needs monitored by SLAs • Advantages of the IP transport service but at the same time its intrinsic limitations to provide QoS • MPLS framework supports TE, QoS and VPNs • Huge amount of bandwidth availability and maturity of the WDM technology 15-05-2001 TERENA Networking Conference 2001 2 Rationale • Need of end-to-end connectivity – Easy setup and maintenance – With required bandwidth and QoS •The combination of IP and WDM without intermediate layers (ATM, SDH) seems promising, but –Completely different technologies and solutions adopted up to now •In the IP domain: the control plane approach using signaling •In the WDM domain the mgmt plane approach using MFs • NOTE: Domain refers only to technology 15-05-2001 TERENA Networking Conference 2001 3 Current Trends • IETF- MPλS – Extends MPLS framework in the optical domain – Synergy with appropriate routing protocols (IS-IS, OSPF extensions) • OIF – Optical Internetworking Forum www.oiforum.org • ODSI- Optical Domain Service Interconnect www.odsicoalition.com – Define ATM-like UNI signaling for IP(ATM/SDH)-WDM and NNI for WDM-WDM (ONE or Optical Sub-network) interaction • ITU-T – G. ASON (Automatically Switched Optical Networks, G. ASTN (Automatically Switched Transport Network 15-05-2001 TERENA Networking Conference 2001 4 Current Trends - Problems • Technical Issues – Standards not yet mature/Early implementation from different vendors – Interoperability issues • Business Model – Incumbent Operators want to make use of their investments in intermediate layer legacy networks (ATM/SDH), which don’t fit in this view – Competitive ISP could deploy such an automatic switched IP over optical network • Still they prefer cost-effective leasing lambdas solution • Dark fiber/ Condominium fiber-lambdas not yet the case • Cisco Suspends the ONS 15900 Series Wavelength Router Product (WaRP) 15-05-2001 TERENA Networking Conference 2001 5 WINMAN WDM and IP Network MANagement Project IST-1999-13305 New approach: Integrate the IP, the WDM (and other existing domains) under a common interdomain mgmt system to provide end-to-end transport services through the use of MPLS 15-05-2001 TERENA Networking Conference 2001 WINMAN - Pros • Technical Issues – Under-development standards (TMF) • Business Model – The solution is extensible to a multi-vendor /multitechnology environment including ATM/SDH – Competitive ISP could deploy it easily • Even if leasing lambdas, but with access to the management system – Vendors push to have first single domain and interdomain management systems than control-plane signaling protocols for ASON networks 15-05-2001 TERENA Networking Conference 2001 7 WINMAN Goals • Integrated Network Management solution, capable of managing end-to-end IP connectivity derived from Service Level Agreements • Dissemination of the WINMAN results to the international telecommunications society • Exploitation of the results in product and service development 15-05-2001 TERENA Networking Conference 2001 8 Project Info • • • • Start date: Duration: Resources: Partners July 1, 2000 33 months 842 Person Months – Operators: Telefonica I+D (Spain) , Portugal Telecom (Portugal), OTE, OTE Consulting (Greece) – Universities: UCL (UK), NTUA (Greece), UPC (Spain) – Industry: Lucent Technologies (Netherlands), TTI-Telecom (Israel), Ellemedia (Greece) 15-05-2001 TERENA Networking Conference 2001 9 Target Architecture • Single point of access for all management functions/technology domains – Easy to add new services Order Mgt Trouble Mgt Billing Mgt Customer Service Process Management INTER-DOMAIN MANAGEMENT SYSTEM (INMS) NMS (Technology A) IP 15-05-2001 NMS (Technology B) ATM NMS (Technology C) SDH NMS (Technology D) WDM TERENA Networking Conference 2001 Network Management 10 Drawbacks of lack of an INMS • Management functions must access NMSs per domain: – Complex – Inefficient (network resource usage and processing) Order Mgt NMS (Technology A) 15-05-2001 Trouble Mgt Billing Mgt NMS (Technology B) NMS (Technology C) Customer Service Process Management NMS (Technology D) Network Management TERENA Networking Conference 2001 11 The scope of WINMAN • Development of the INMS and IP, WDM NMSs as well – Single Connection Model (technology neutral) – Uniform QoS perception – Uniform Fault and Performance representation • Makes use of existing Standards – ITU-T’s G.805, G.852 connection models – TMF´s Telecommunication Operations Map – TMF’s MultiTechnology Network Management (MTNM) 2.0 and CASMIM (Connection and Service Management Information Model) Interface – IETF´s MPLS for the IP network 15-05-2001 TERENA Networking Conference 2001 12 Business/Functional Model Service Management Actors Service Management Layer Northbound Reference Point WINMAN Solution Inter Domain Functional System Network Management Layer WINMAN Operator WINMAN Workstation Reference Point IP Network Management Functional System ATM Network Management Functional System SDH Network Management Functional System WDM Network Management Functional System Southbound Reference Points Element Management Layer IP Element Management Actor 15-05-2001 ATM Element SDH Element Management Actor Management Actor TERENA Networking Conference 2001 WDM Element Management Actor 13 Physical Model Service Management Service Management Level Customer Service Manager Service Management Layer Trouble Billing Manager Manager Order Manager Network Management Level Service Level Reporter Published CORBA API Inter-Domain Performance Manager PM data DB Perfroma nce Manager Network Operator GUI Inter-Domain Fault Manager Inter-Domain Configuration Manager Implementa tion Manager Design DB End-to-End Design Manager Fault Correlation Manager Fault Topology DB Published CORBA API Physical Inventory Manager Domain Manager NMS Domain Manager NMS Domain Manager NMS Domain Manager NMS Inventory DB Network Element Management Level IP EMS ATM EMS Systems will not be implemented SDH EMS WDM EMS Network Element Level IP 15-05-2001 ATM SDH TERENA Networking Conference 2001 WDM 14 Technical Approach • Definition of InterDomain Network Management architecture – Consider connectivity services based on IP/MPLS • Network Management systems implementation – InterDomain Network Management System – WDM Network Management System – IP Network Management System • Experimental verification: – Management of multiple testbeds 15-05-2001 TERENA Networking Conference 2001 15 Main Characteristics • Multivendor, multidomain management • Focus on IP over WDM • Open management architecture • Policy-based driven management 15-05-2001 TERENA Networking Conference 2001 16 Mgmt Functions/Applications • Configuration Management – Establish end-to-end connectivity services – Present end-to-end view of the services – Autodiscovery of network elements •Fault Management –Receive alarms from domain network managers –Isolate and localize faults •Performance Management –Monitor Quality of Transport entities –Identify network congestion and hotspots •Interaction between these applications for Survivability 15-05-2001 TERENA Networking Conference 2001 17 Design/Implementation Method • Unified Modeling Language (UML) – – – – – – Requirements Use Cases (on Summary/User/Atomic level) Scenarios (sunny weather & error handling) Message Sequences (data flow) Architecture (building blocks and interfaces identification) Specification (interface descriptions) • Tools – Rational Rose • Distributed Component Model – CORBA Component Model – EJB Component Model 15-05-2001 TERENA Networking Conference 2001 18 Domain Model Views Client Layer MPLS MPLS CTP MPLS CTP MPLS CS MPLS TTP MPLS MPLS MPLS Link Connection SubNetwork-1a SubNetwork-1b MPLS MPLS MPLS CTP MPLS CTP CTP CTP MPLS-SNC MPLS-SNC MPLS PTP MPLS TTP MPLS Trail / LSP MPLS Topological Link Optical TTP MPLS MPLS SubNetwork-2a SubNetwork-2b MPLS CTP MPLS IP -SNC MPLS-SNC IP -SNC MPLS-SNC CTP MPLS MPLS Topological PTP Link Optical TTP Och Trail Optical CTP Optical Optical SubNetwork-1b SubNetwork-1a Optical CTP CTP/TTP PTP Topological Link Trail Sub-network Connection Link Connection 15-05-2001 WDM -SNC OCh-SNC WDM -SNC OCh-SNC Optical CTP Optical Optical Topological PTP Link TERENA Networking Conference 2001 Server Layer WDM 19 Conclusions • Challenging approach for IP/WDM integration based on the management plane • The WINMAN solution is a unified management architecture for different technological domains • Short/medium term or long term to coexist with control based approaches partly depending on the WINMAN solution evaluation More details are available at the WINMAN WEB site http://www.winman.org/ 15-05-2001 TERENA Networking Conference 2001 20