A management architecture for IP over WDM integration

1. A management architecture for IP over WDM integration Dr. Fotis Karayannis1, Mr. Lampros Raptis2, Dr. Joan Serrat3, Mr. Giorgos Chatzilias2, Mr. Dimitris Chronis4 1OTE Consulting S.A., fotisk@oteconsult.gr 2 National Technical University of Athens, {lraptis, gchatzi}@telecom.ntua.gr 3 Universitat Politècnica de Catalunya, serrat@tsc.upc.es 4 Hellenic Telecommunications Organisation SA, dichroni@ote.gr TERENA Networking Conference 2001

2. 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 TERENA Networking Conference 2001

3. 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 TERENA Networking Conference 2001

4. 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.odsi-coalition.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 TERENA Networking Conference 2001

5. 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) TERENA Networking Conference 2001

6. WINMANWDM 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 TERENA Networking Conference 2001

7. WINMAN - Pros • Technical Issues • Under-development standards (TMF) • Business Model • The solution is extensible to a multi-vendor /multi- technology 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 inter-domain management systems than control-plane signaling protocols for ASON networks TERENA Networking Conference 2001

8. 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 TERENA Networking Conference 2001

9. Project Info • Start date: July 1, 2000 • Duration: 33 months • Resources: 842 Person Months • Partners • 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) TERENA Networking Conference 2001

10. Process Management Order Mgt Trouble Mgt Billing Mgt Customer Service INTER-DOMAIN MANAGEMENT SYSTEM (INMS) NMS (Technology A) IP NMS (Technology B) ATM NMS (Technology C) SDH NMS (Technology D) WDM Network Management Target Architecture • Single point of access for all management functions/technology domains • Easy to add new services TERENA Networking Conference 2001

11. Process Management Order Mgt Trouble Mgt Billing Mgt Customer Service NMS (Technology A) NMS (Technology B) NMS (Technology C) NMS (Technology D) Network Management Drawbacks of lack of an INMS • Management functions must access NMSs per domain: • Complex • Inefficient (network resource usage and processing) TERENA Networking Conference 2001

12. 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 TERENA Networking Conference 2001

13. Business/Functional Model Service Management Actors Service Management Layer Northbound Reference Point WINMAN Solution Inter Domain Functional System Network Management Layer WINMAN Operator ATM Network Management Functional System SDH Network Management Functional System WDM Network Management Functional System IP Network Management Functional System WINMAN Workstation Reference Point Southbound Reference Points Element Management Layer ATM Element Management Actor IP Element Management Actor WDM Element Management Actor SDH Element Management Actor TERENA Networking Conference 2001

14. Physical Model TERENA Networking Conference 2001

15. Technical Approach • Definition ofInterDomain 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 TERENA Networking Conference 2001

16. Main Characteristics • Multivendor, multidomain management • Focus on IP over WDM • Open management architecture • Policy-based driven management TERENA Networking Conference 2001

17. 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 TERENA Networking Conference 2001

18. 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 TERENA Networking Conference 2001

19. Domain Model Views TERENA Networking Conference 2001

20. 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/ TERENA Networking Conference 2001