1. LINKING CITY NETWORKS Final Presentation Team 14 http://csd.ssvl.kth.se/~csd2004-team14 CSD Project 24 th May, 2004

2. Abstract Multiple islands of broadband networks in Stockholm with structural similarities but differences in technical solutions and business models. Single islands often too small to support multiple services. We want to create a dynamic open market for service providers by linking city access networks. Local traffic between networks should not be sent over the Internet. How? New use of existing local internet exchanges for connecting city access networks. Linking City Networks

3. The Video Linking City Networks Please play the video…

4. Setting the National & Regional Scene Linking City Networks Synergy effects between local peering and linking of city networks. Driver of market growth. New national telecommunications law. Key trends: - Lower entry barriers. - Increasing local provider competition. - Rising power of the consumer.

5. Different business models. Different technical solutions. Key premises: - Different business models will exist concurrently. - Solutions designed for co-existence of different technologies. Neighbour scenario & central point scenario. Analysis of Reference Networks Linking City Networks

6. Evaluation of Scenarios Centralized topology preferable. - No weakest link problem. - No unnecessary transit traffic. - Less need for relationship management. - Business models are isolated from each other. - Better scalability prospects. How to minimize drawbacks? The involvement of SOLIX. Feedback, what do key players think? Linking City Networks

7. Organisational Form The organisational structure should support neutrality. Evaluation based on technical and behavioural specifications. Sharing of profit and loss. Interconnection should be a separate service. Overheads should be kept down. The central organisation should not own infrastructure. Linking City Networks Recommendations:

8. Setting Up New Nodes Setting up central points of distribution for the services for the networks. Advantages of having central points of distributions for a company like SB. Requirements for the central points: Hardware, administration and technology. SB’s point of view: Issues such as connecting networks to the central node. Can a central point of distribution owned by SB be a part of SOLIX? Linking City Networks

9. Technical Design Final solution possible with two different technologies. The virtual LAN based solution. Virtual LANs should run on SOLIX into networks. Advantages. Problem: Number of virtual LANs available. Solutions available. Problem: MAC spoofing. Linking City Networks

10. Technical Design (con’t) Solutions to MAC spoofing. Argument in favor of another design. Layer three Policy Based Routing solution. Inevitable requirements. How things will work. Advantages: SOLIX’s perspective and local traffic. Possible problems. Final proposal for a solution Linking City Networks

11. Technical Design (con’t) Linking City Networks

12. Technical Design (con’t) Solutions to MAC spoofing. Argument in favor of another design. Layer three Policy Based Routing solution. Inevitable requirements. How things will work. Advantages: SOLIX’s perspective and local traffic. Possible problems. Final proposal for a solution Linking City Networks

13. Pilot Case: Kista IP Linking City Networks Two separate networks – Kista IP I & Kista IP II. - Kista IP I: Stakeholders KTH and SB. - Kista IP II: Stakeholders OpenNet, SB and ISPs. Key stakeholder analysis after connection: SB, KTH, OpenNet, ISPs.

14. Pilot Case: Proposed Solution Linking City Networks Aims for an open, compatible and scalable network. Process to comply with the circumstances and feedback. Key technology – Policy Based Routing. The implementation of local traffic exchange to be tested. Two alternatives to exchange traffic between networks: With the help of Bahnhof or directly through SOLIX.

15. Kista IP: First Scenario Linking City Networks

16. Kista IP: Second Scenario Linking City Networks

17. Pilot Case: Action Plan Linking City Networks Relies on positive response from SOLIX members. Possibility of OpenNet connecting at Tulegatan. Configuration on the new equipment of Kista IP I. The deal with Bahnhof must be finalized. The traffic exchange will be set up.

18. Conclusions Central point scenario preferable. Need for a neutral central organisation. Strong synergies between internet exchange and linking of city networks. Svenska Bostäder could potentially benefit from setting up a new node in the shared infrastructure. For maximum utilization of the available backbone, a layer three solution should be implemented. Linking City Networks

19. Questions Linking City Networks ?

20. LINKING CITY NETWORKS Linking City Networks Thanks! http://csd.ssvl.kth.se/~csd2004-team14/