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RMDCN Technical Solution

RMDCN Technical Solution. Tony Bakker WAN Group Leader, Network Section ECMWF. Agenda (1). Background & Requirements EQUANT Solution Access Frame Relay X25 access X25-Frame Relay Gateway. Agenda (2). Backup options ISDN/PSTN Dialup Mission Critical environment TCP/IP Issues

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RMDCN Technical Solution

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  1. RMDCNTechnical Solution Tony Bakker WAN Group Leader, Network Section ECMWF RMDCN Workshop, 18-20 Jan 99

  2. Agenda (1) • Background & Requirements • EQUANT Solution • Access • Frame Relay • X25 access • X25-Frame Relay Gateway RMDCN Workshop, 18-20 Jan 99

  3. Agenda (2) • Backup options • ISDN/PSTN Dialup • Mission Critical environment • TCP/IP Issues • Prioritisation • Network Monitoring RMDCN Workshop, 18-20 Jan 99

  4. Background (1) • Jan 1993: Working group on Planning and Implementation of the WWW in Region VI: • identified the necessity for GTS reorganization • Sep 1993: Subgroup on regional aspects of GTS • first proposal for modernisation of RMTN • 1994 - RMDCN Steering Group established • 1996 - RFI/RFQ for MDN RMDCN Workshop, 18-20 Jan 99

  5. Background (2) • 1997: Steering group recommendation: • A MDN provides a cost effective way for providing the requirements for an RMDCN • Requested ECMWF to lead and co-ordinate the procurement, implementation and operational phase for all countries • establish a Contract Advisory Committee • Jun 1997: ECMWF Council accepts timetable for RMDCN project RMDCN Workshop, 18-20 Jan 99

  6. Background (3) • Nov 1997: RMDCN Contract Advisory Committee and ECMWF • start preperation of ITT Documents • Apr 1998: ITT • Dec 1998 - ECMWF Council approves RMDCN Contract with EQUANT RMDCN Workshop, 18-20 Jan 99

  7. RMDCN Workshop, 18-20 Jan 99

  8. ECNETThe ECMWF external telecommunications network RMDCN Workshop, 18-20 Jan 99

  9. Requirements • combine the two networks • RAVI GTS & ECMWF • cost savings • technological improvements • fully managed network - uniform service level • high availability • prioritisation of traffic • multi-protocol (IP, X.25, DECnet) RMDCN Workshop, 18-20 Jan 99

  10. ECMWF - Dissemination of products (to Member States) - Observations (from Member States) - Interactive sessions - data transfers to/from Member States GTS - Observations - Forecast data - low priority messages - other data RMDCN Workshop, 18-20 Jan 99

  11. EQUANT Solution (1) • Frame Relay Access Service • complemented by X25 Access Service • create a Virtual Private Network • LAN Access Service • fully managed CISCO router service • Management of Access Line • liaise with PTT (line order, fault reports, etc) RMDCN Workshop, 18-20 Jan 99

  12. EQUANT Solution (2) • X25 - Frame Relay Gateway • TCP/IP as transport protocol • irrespective of access method • X25 encapsulated (XOT) RMDCN Workshop, 18-20 Jan 99

  13. EQUANT Solution EQUANT Global Network Global Network KEY SITA/EQUANT POP LAN Access router Leased line Virtual Circuit RMDCN Workshop, 18-20 Jan 99

  14. X25 switch MSS CPE LAN Access Access Line POP EQUANT Global Network RMDCN Workshop, 18-20 Jan 99

  15. Frame Relay Access Service MSS X25 switch FR CPE LAN POP EQUANT Global Network pvc MSS X25 switch POP CPE LAN FR RMDCN Workshop, 18-20 Jan 99

  16. Frame Relay Access Service POP X25 POP pvc Equant Global Network XOT Access Line pvc POP pvc POP TCP/IP FR pvc TCP/IP CPE POP RMDCN Workshop, 18-20 Jan 99

  17. GW X25 Access Service MSS X25 switch CPE LAN POP Frame Relay pvc EQUANT Global Network POP svc MSS X25 switch POP X25 CPE LAN RMDCN Workshop, 18-20 Jan 99

  18. X25 Access Service FR CPE GW POP X25 POP EQUANT Global Network XOT Access Line svc POP POP TCP/IP svc X25 X25 TCP/IP CPE CPE RMDCN Workshop, 18-20 Jan 99

  19. X25-Frame Relay Gateway • communication between Frame Relay and X25 connected Sites • configuration • Special purpose CISCO routers • two different locations within the EQUANT RMDCN VPN • fully managed by EQUANT RMDCN Workshop, 18-20 Jan 99

  20. Backup options • ISDN/PSTN backup • box before CPE serial interface • Mission Critical • Dual Access Line • Dual CPE • CISCO HSRP • shadow PVC RMDCN Workshop, 18-20 Jan 99

  21. M M ISDN Dial Backup X POP EQUANT Global Network CPE Access Line RMDCN Workshop, 18-20 Jan 99

  22. M M M M Mission Critical X POP CPE EQUANT Global Network POP Host HSRP POP CPE CPE RMDCN Workshop, 18-20 Jan 99

  23. TCP/IP Issues • Public IP Network Addresses • LAN interface • X25 interface • EQUANT can provide IP Network Address Range if necessary • IP routing options • Static routes • OSPF with filtering RMDCN Workshop, 18-20 Jan 99

  24. Prioritisation • Standard CISCO options • custom queuing • priority queues • weighted fair queueing • works on output buffer of PVC • preference for custom queuing • allocate amount of buffer to traffic pattern based on src-dest-port (IP level) RMDCN Workshop, 18-20 Jan 99

  25. Network Monitoring • EQUANT tools: • SITAVISION: VPN view • HP Openview add-on • Allows to monitor all RMDCN CPE interfaces • TTVISION: Trouble Ticket • ECMWF will monitor the network and report regularly to RA VI via the RMDCN CAC and the RMDCN Operations Committee (ROC) RMDCN Workshop, 18-20 Jan 99

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