HSTR Seminar


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Madge Networks HSTR Seminar

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  • 4 Shared Token Ring has been and continues to be chosen for its superior fault tolerance and manageabilty. These are valued benefits. Token Ring is the technology of choice for industries where availability of the network is mission critical to the business (Banking, Retail, Financial services, insurance etc.). Server bandwidth and Interswitch congestion are emerging as real concerns for large Token Ring users. Server backup is an obvious application that will need more speed and bandwidth into the server. As server disks mushroom in size to cope with user demand for space, the time taken to backup extends to point where it is unacceptable. Users are already upgrading tape backup equipment to improve speeds, but at some point soon, it will be the 16Mbps network speed rather than the tape that sets the limit. Some large network users find 16Mbps interswitch links are becoming significantly loaded and itstarting to become an urgent issue
  • HSTR Seminar

    1. 1. High Speed Token Ring for the 21st Century Seminar Series
    2. 3. Agenda <ul><li>Madge Networks in Token Ring </li></ul><ul><li>The History and Future of Token Ring </li></ul><ul><li>The HSTR Alliance </li></ul><ul><li>HSTR Explained </li></ul><ul><li>Token Ring for the 21st Century </li></ul><ul><li>HSTR in Action </li></ul>
    3. 4. Madge Networks N.V. <ul><li>Founded in 1986 by Robert Madge </li></ul><ul><li>Quoted on NASDAQ (NASDAQ:MADGF) </li></ul><ul><li>Madge Networks </li></ul><ul><ul><li>Wexham Springs - UK </li></ul></ul><ul><ul><li>Eatontown - USA </li></ul></ul><ul><ul><li>Sales offices around the globe </li></ul></ul><ul><li>Lannet </li></ul><ul><ul><li>Tel Aviv - Israel </li></ul></ul><ul><li>Customer support without limits </li></ul><ul><li>Financial success based on ethical standards </li></ul>
    4. 5. Madge Networks Business Model Token Ring Video Networking ISDN Carrier Customers Business Units Token Ring Video Networking ISDN Carrier VARs, Resellers, OEMs Strategic Partners etc.
    5. 6. Token Ring Market Overview <ul><li>$2.2bn world-wide market </li></ul><ul><li>Large, stable market </li></ul><ul><ul><li>‘98 market size will be over $2bn </li></ul></ul><ul><ul><li>4.6m adapters sold in ‘97 </li></ul></ul><ul><li>Huge, well defined user base </li></ul><ul><ul><li>Over 20m desktops now run on Token Ring </li></ul></ul><ul><li>Significant growth expected in TR switching </li></ul><ul><ul><li>Dell’Oro forecasts 1.3m switch ports by 2000 </li></ul></ul><ul><li>Major Token Ring vendors still investing heavily in Token Ring technology </li></ul>
    6. 7. Madge’s Position in Token Ring <ul><li>Number 1 in Backbone Switching in Europe </li></ul><ul><li>Number 2 in Adapters World-wide </li></ul><ul><li>Number 3 in Stackable Shared hubs </li></ul><ul><li>Very strong brand name in Token Ring </li></ul><ul><li>Excellent channel partners </li></ul><ul><li>Own core Token Ring technology </li></ul><ul><li>Continue to drive key Token Ring standards </li></ul><ul><ul><li>TR LAN Emulation, High Speed Token Ring </li></ul></ul><ul><li>Over 12 years experience in this market </li></ul>
    7. 8. Madge’s Continued Leadership <ul><li>First vendor to launch a cut-through Token Ring switch </li></ul><ul><li>First to market with PCI, EISA, MC32 & CardBus adapters </li></ul><ul><li>First vendor to break the $200 price point for Token Ring adapters </li></ul><ul><li>First major Token Ring vendor after IBM to deliver its own Token Ring chipset </li></ul><ul><li>First vendor to deliver standards-based Token Ring LAN Emulation </li></ul>
    8. 9. High Speed Token Ring The future for Token Ring Networks <ul><li>IDC Research ‘97: </li></ul><ul><ul><li>>46% Token Ring users voted for a higher speed Token Ring as their preferred backbone </li></ul></ul><ul><li>HSTR has both press and user attention </li></ul><ul><ul><li>Growing interest since the launch in August 97 </li></ul></ul><ul><li>HSTR is the future for Token Ring </li></ul><ul><ul><li>Preserves and extends Token Ring strengths </li></ul></ul>
    9. 11. The History and Future of Token Ring The Madge Perspective
    10. 12. Why Token Ring? <ul><li>Historical choice for migration of transaction processing applications </li></ul><ul><li>Very high reliability </li></ul><ul><ul><li>Automatic fault detection & recovery </li></ul></ul><ul><ul><li>Source routing for maximum resilience on backbones </li></ul></ul><ul><li>Manageability </li></ul><ul><ul><li>Highly intelligent MAC </li></ul></ul><ul><ul><li>Management built into every station </li></ul></ul>
    11. 13. Why Token Ring? <ul><li>Efficiency & scalability </li></ul><ul><ul><li>Highly deterministic </li></ul></ul><ul><ul><li>Token Ring can operate at over 99% of available bandwidth </li></ul></ul><ul><ul><li>Supports large frames </li></ul></ul><ul><li>Compatibility </li></ul><ul><ul><li>With existing applications e.g. SNA </li></ul></ul><ul><li>Future proof </li></ul><ul><ul><li>Token priority designed in from outset </li></ul></ul><ul><ul><li>Easily scaled from 4 to 16Mbps in early ‘90s </li></ul></ul>
    12. 14. Communications Revolution Transaction Processing Client-Server Applications Intranets & Web-based Communications Multimedia Communications Ubiquitous Email Office Automation Network Demands 1970 1980 1990 2000
    13. 15. Network Impact of Changes Smaller shared segments Shared 10Mbps Switched 10Mbps in backbone 100Mbps in backbone Switched 10Mbps to desktop 1Gbps in backbone Switched 100Mbps Ethernet Major technology change every 2 years Users forced to upgrade every time
    14. 16. Token Ring Meeting the Challenge Smaller shared segments Shared 10Mbps Switched 10Mbps in backbone 100Mbps in backbone Switched 10Mbps to desktop 1Gbps in backbone Switched 100Mbps Token Ring Shared 4Mbps Shared 16Mbps Switched 16Mbps in backbone Token Ring has consistently been able to meet demands placed on it by new applications
    15. 17. Challenges of the New Millennium <ul><li>Ubiquity of the desktop PC in corporations </li></ul><ul><li>Microsoft dominance at the desktop & server </li></ul><ul><li>Wide-scale deployment of web-based applications in corporate Intranets </li></ul><ul><ul><li>IP becoming the dominant network protocol </li></ul></ul><ul><li>New desktop multimedia applications enrich business communications </li></ul><ul><ul><li>Video starting to emerge as a real business tool </li></ul></ul><ul><li>Rising network traffic </li></ul><ul><li>Greater inter-connection between networks </li></ul>
    16. 18. Problems to be Addressed <ul><li>Scalability </li></ul><ul><ul><li>Scaling network performance in congested areas of the network e.g. backbone, servers & workgroups </li></ul></ul><ul><li>Affordability </li></ul><ul><ul><li>Driving down the total cost of Token Ring networking </li></ul></ul><ul><li>Applications </li></ul><ul><ul><li>Enhancing the network with new applications </li></ul></ul><ul><li>Integration </li></ul><ul><ul><li>Integration between Token Ring and Ethernet, allowing information to be shared freely </li></ul></ul>
    17. 19. Token Ring: Likes and Concerns <ul><li>Fault tolerance </li></ul><ul><li>Manageability </li></ul><ul><li>Compatibility with business applications </li></ul><ul><li>Congested inter-switch links </li></ul><ul><li>Inadequate server I/O speeds </li></ul><ul><li>. . . and in the future </li></ul><ul><li>Desktop bandwidth for power users </li></ul><ul><li>Support for multi-services </li></ul>
    18. 20. The ROPE Fallacy For existing Token Ring installations, incremental upgrades will almost always be easier to implement and cost less than attempting a change of network technology at every desktop R ip O ut Token Ring P ut in E thernet
    19. 21. Token Ring Performance 16 + 16  100 Switch DTR is the same or faster than 100BaseT for server backups Switch TR Workstations run significantly faster into TR based servers compared with those 100BaseT based DTR DTR
    20. 22. Backbone Alternatives                   Fault Tolerance Scalability Compatibility Simplicity Performance Ethernet Co-existence Cost    FDDI Fast Ethernet ATM
    21. 23. ATM in the Backbone <ul><li>Used by many companies around the world </li></ul><ul><li>Many benefits: </li></ul><ul><ul><li>Seamless connectivity if ATM used in the WAN </li></ul></ul><ul><ul><li>Great for consolidating PBX voice traffic and LAN traffic on same infrastructure </li></ul></ul><ul><ul><li>Guaranteed QoS </li></ul></ul><ul><ul><li>Currently only way to consolidate TR & Ethernet traffic on same wire </li></ul></ul><ul><li>But large proportion of Token Ring users looking for a simple, frame-based backbone solution </li></ul>
    22. 24. What TR Users Need Tomorrow High Speed LAN Backbone High speed server connections High speed inter-switch connections Power User desktop connections Accommodate Ethernet workgroups
    23. 25. High Speed Token Ring Alliance
    24. 26. Who is the HSTRA <ul><li>The industry’s leading Token Ring vendors joining forces to ensure rapid delivery of high-speed Token Ring to customers. </li></ul><ul><ul><li>Madge Networks </li></ul></ul><ul><ul><li>3Com </li></ul></ul><ul><ul><li>Olicom </li></ul></ul><ul><ul><li>Bay Networks </li></ul></ul><ul><ul><li>UNH Interoperability Lab </li></ul></ul><ul><ul><li>IBM </li></ul></ul><ul><ul><li>Xylan </li></ul></ul>
    25. 27. High-Speed Token Ring Alliance Roadmap <ul><li>March - European Press Summit, NetEvents </li></ul><ul><li>April - HSTR Technical Tolly Town Meetings </li></ul><ul><li>May - InterOp, Multiple vendor HSTR technology demonstrations </li></ul><ul><li>July - UNH Interoperability Testing </li></ul><ul><li>July - Progress Standards to Sponsor level ballot </li></ul><ul><li>Fall 98 Product introductions </li></ul>
    26. 28. HSTR Alliance
    27. 29. More Information on HSTRA www.hstra.com
    28. 31. High Speed Token Ring Explained
    29. 32. What is High Speed Token Ring? <ul><li>Initially defined for speeds of 100 Mbps </li></ul><ul><li>Scaleable to 1 Gbps and beyond </li></ul><ul><li>Part of the IEEE 802.5 Token Ring standard </li></ul><ul><ul><li>Native High Speed Token Ring standard </li></ul></ul><ul><ul><li>Not based on proprietary technology </li></ul></ul><ul><ul><li>Makes use of existing cabling systems </li></ul></ul><ul><li>Defined for Dedicated Token Ring initially </li></ul><ul><ul><li>Important in backbone application </li></ul></ul><ul><ul><li>Shared HSTR being evaluated as a desktop technology </li></ul></ul>
    30. 33. Targets for the IEEE <ul><li>Development of standards by Q4 98 </li></ul><ul><ul><li><1 year - conception to ratification </li></ul></ul><ul><li>Use current Token Ring cabling </li></ul><ul><ul><li>STP - Type 1 </li></ul></ul><ul><ul><li>UTP - Cat 5 </li></ul></ul><ul><li>Reusing tried & test technology </li></ul><ul><ul><li>100 Mbps Phy from 100BaseT </li></ul></ul><ul><ul><li>MAC developed from DTR </li></ul></ul>
    31. 34. IEEE 802.5 Standards schedule <ul><li>Aggressive standards development schedule in the IEEE 802.5 Token Ring Working Group: </li></ul>
    32. 35. HSTR End Stations Token Ring ISO Layer PHY Physical Data Link Network MAC Interface Protocol Driver - NDIS/ODI TCP/IP, IPX/SPX, NetBEUI 16/4 100 Token Ring Network 16/4 - Manchester Encoding LLC - I & II 100 Mbps - 4b/5b (as used in Fast Ethernet & FDDI MLT-3)
    33. 36. Why not ISL? <ul><li>Proprietary </li></ul><ul><ul><li>Single choice for backbone equipment </li></ul></ul><ul><ul><li>Not compatible with Fast Ethernet switches </li></ul></ul><ul><li>Inefficient </li></ul><ul><ul><li>Encapsulation forces more frame processing on PCs </li></ul></ul><ul><ul><li>Adapters have no ability to process frames </li></ul></ul>
    34. 37. Why is HSTR a dedicated link? <ul><li>Switch port prices are eroding quickly </li></ul><ul><ul><li>Hub port prices are stable </li></ul></ul><ul><ul><li>Price parity by mid 1999 </li></ul></ul><ul><li>Easier upgrade path for users </li></ul><ul><ul><li>One node at a time </li></ul></ul><ul><li>The early need </li></ul><ul><ul><li>Servers & inter-switch links </li></ul></ul><ul><li>Shared standard </li></ul><ul><ul><li>More complex </li></ul></ul><ul><ul><li>New hubs will be needed </li></ul></ul>
    35. 38. What cabling types and standards will HSTR use? <ul><li>Considerations </li></ul><ul><ul><li>Higher speed - more susceptible to emissions </li></ul></ul><ul><ul><li>Dedicated links - active re-timing at each station </li></ul></ul><ul><ul><li>Token Ring’s unique lobe test - reassuring cable quality </li></ul></ul><ul><li>STP - type 1 100m </li></ul><ul><ul><li>Large older installations </li></ul></ul><ul><ul><li>Better immunity - shielded cable </li></ul></ul><ul><li>UTP - Cat 5 100m </li></ul><ul><ul><li>Newer installations </li></ul></ul><ul><ul><li>Certainly been adequate for Fast Ethernet </li></ul></ul>
    36. 39. What cabling types and standards will HSTR use? <ul><li>Fibre </li></ul><ul><ul><li>Standard still needs some definition </li></ul></ul><ul><ul><li>Cannot use 802.5j </li></ul></ul><ul><ul><li>Physical specification is IEEE 802.3u </li></ul></ul><ul><ul><ul><li>re-use of FDDI signalling </li></ul></ul></ul><ul><ul><ul><li>different laser wavelengths to 16/4Token Ring </li></ul></ul></ul><ul><ul><li>Fibre runs of up to 2 Km </li></ul></ul>
    37. 40. What VLAN standards will be supported on HSTR? <ul><li>VLANs - Virtual LANs </li></ul><ul><ul><li>Definition: </li></ul></ul><ul><ul><ul><li>Stations grouped together as if on the same LAN </li></ul></ul></ul><ul><ul><li>Each group has unique identifying Tag </li></ul></ul><ul><ul><li>Standardised under 802.1Q </li></ul></ul><ul><li>VLANs to support Ethernet </li></ul><ul><ul><li>Tagged Ethernet frames can travel over HSTR </li></ul></ul><ul><ul><li>HSTR can be used as common backbone for mixed Ethernet & Token Ring networks </li></ul></ul>
    38. 41. What about HSTR Network Management? <ul><li>HSTR will support the same management functions that Token Ring supports today </li></ul><ul><ul><li>Error reporting, link error analysis, force remove, adapter status removal </li></ul></ul><ul><li>RMON support extended to HSTR </li></ul><ul><ul><li>HSTR switch ports can be managed in the same way 4/16Mbps ports </li></ul></ul><ul><li>Seamless network management with application support </li></ul>
    39. 42. How much will HSTR cost? <ul><li>First products will be highly integrated </li></ul><ul><ul><li>Adaptation of existing Token Ring silicon solutions </li></ul></ul><ul><ul><li>Cost effective solutions in first products </li></ul></ul><ul><li>Initial target: 25% above traditional Token Ring </li></ul><ul><li>Expected fast price reduction as components become even more integrated </li></ul>
    40. 43. HSTR Delivers  Fault Tolerance  Scalability  Compatibility  Simplicity  Performance  Ethernet Co-existence SR support enables multiple redundant paths, and duplicate MAC addresses Scales to 100 Mbps and 1 Gbps Uses native Token Ring frame formats and packet sizes No new protocols to learn Native TR: Good client server performance 4.5K bytes frame size: faster backups Supports 802.1Q VLAN tagging enabling Ethernet packet transport over HSTR High Speed Token Ring  Cost Leverages low cost high volume components for best value
    41. 44. HSTR: Key Milestones <ul><li>Alliance launch Oct. 97 </li></ul><ul><ul><li>NetWorld & Interop, Atlanta </li></ul></ul><ul><li>Madge hosts Alliance meeting in UK Oct. 97 </li></ul><ul><li>Technology demonstrations </li></ul><ul><ul><li>First product: CeBit, Germany Mar. 98 </li></ul></ul><ul><ul><li>Live demonstrations: N& I, Las Vegas May 98 </li></ul></ul><ul><ul><li>Networks 98,UK Jun. 98 </li></ul></ul><ul><li>Multi-vendor interoperability testing Jul. 98 </li></ul><ul><ul><li>University of New Hampshire </li></ul></ul><ul><li>First products Sep. 98 </li></ul>
    42. 45. Where will HSTR be used? <ul><li>Initially as a backbone technology </li></ul><ul><ul><li>Server to switch connections </li></ul></ul><ul><ul><li>Switch to switch connections </li></ul></ul><ul><ul><li>Workgroup switch to backbone switch connection </li></ul></ul><ul><li>Later as a workgroup technology </li></ul><ul><ul><li>Workgroup switching will be deployed first to resolve performance bottlenecks </li></ul></ul><ul><ul><li>HSTR in the workgroup will further enhance workgroup performance </li></ul></ul><ul><ul><li>Not expected to occur for 2-5 years </li></ul></ul>
    43. 46. HSTR networking example 4/16/100 Mbps Server NICs HSTR used for inter-switch links HSTR Power-users connected into Ringswitch HSTR up-link for workgroups 4/16/100 Mbps NICs
    44. 47. Beyond 100Mbps Token Ring <ul><li>Standards provision for Gigabit Token Ring: </li></ul><ul><ul><li>Same MAC </li></ul></ul><ul><ul><li>Re-use of Fiber Channel PHY (Gbps Ethernet) </li></ul></ul><ul><ul><li>Ratified standard 9-12month after 100Mbps </li></ul></ul><ul><li>Target Applications </li></ul><ul><ul><li>Initially deployed for building and campus inter-switch links </li></ul></ul><ul><ul><li>Technology demonstrations: 1999 </li></ul></ul>
    45. 48. Token Ring is strategic once more <ul><li>HSTR is targeted at TR user needs </li></ul><ul><ul><li>Preserves and enhances existing investments </li></ul></ul><ul><ul><li>Alternatives are either high latency, expensive, a “fork lift” upgrade or all three </li></ul></ul><ul><li>HSTR & Token Ring: real benefits </li></ul><ul><ul><li>Performance & efficiency </li></ul></ul><ul><ul><li>Preserves Token Ring resilience and service quality advantages </li></ul></ul><ul><ul><li>Supports existing Token Ring cabling and applications </li></ul></ul><ul><ul><li>Token Ring remains the strategic choice </li></ul></ul>
    46. 49. Madge strategy for HSTR & Token Ring: A complete solution Backbone Switches Server Adapters ATM Switches & High Speed Token Ring Desktop Adapters Campus Backbone Token Ring Backbone Workgroup Desktop Hubs & Switches Hubs & Switches
    47. 50. Complete Token Ring solutions The issues <ul><li>Maintaining business mission critical network availability </li></ul><ul><ul><li>Resilient network configurations </li></ul></ul><ul><ul><li>Proactive network management </li></ul></ul><ul><ul><li>Making it easy to handle moves and changes </li></ul></ul><ul><li>Properly dealing with broadcast traffic </li></ul><ul><ul><li>An architecture for performance switched networks </li></ul></ul><ul><li>Compatibility with existing networks </li></ul><ul><ul><li>Adapters: one driver standard for all applications </li></ul></ul><ul><ul><li>Infrastructure: support of network cabling and existing LAN technology </li></ul></ul><ul><li>Easy , incremental scaling options </li></ul>
    48. 51. Backbone switching Madge Smart Ringswitch Plus <ul><li>1.5 Gbps capacity </li></ul><ul><li>6 slots for switching modules </li></ul><ul><li>Up to 36 full duplex TR ports </li></ul><ul><li>Unique software functionality </li></ul><ul><li>ATM and FDDI uplinks </li></ul><ul><li>September 98: </li></ul><ul><ul><li>4 port copper HSTR </li></ul></ul><ul><ul><li>2 port fibre HSTR </li></ul></ul>Smart Ringswitch Plus
    49. 52. Small Backbone/segment switching Madge Smart Ringswitch Express <ul><li>1.5 Gbps capacity </li></ul><ul><li>Easy to use switching solution </li></ul><ul><li>Advanced software functionality </li></ul><ul><li>HSTR ready </li></ul><ul><ul><li>4 port copper HSTR </li></ul></ul><ul><ul><li>2 port fibre HSTR </li></ul></ul>Smart Ringswitch Express
    50. 53. Ringswitch Family Network Management Capture Matrix Host Top N History Statistics Token Ring Alarm Event Host Filter <ul><li>Smart Ringswitch family </li></ul><ul><ul><li>The only Token Ring switches to fully support RMON </li></ul></ul><ul><ul><li>Extends to HSTR too! </li></ul></ul>Monitoring Warnings Who’s talking Diagnostics
    51. 54. Ringswitch Family Solution strength as switched backbone <ul><li>Layer 3 Filtering </li></ul><ul><ul><li>Manages protocol specific broadcasts </li></ul></ul><ul><ul><li>Active Broadcast Control </li></ul></ul><ul><ul><ul><li>Reduces broadcast traffic by up to 90%! </li></ul></ul></ul><ul><ul><li>Important for an extended switched infrastructure </li></ul></ul><ul><ul><li>Optimum speed & ease of administration </li></ul></ul>
    52. 55. Ringswitch Family Workgroup Switching <ul><li>Low cost switch access for servers and power users </li></ul><ul><li>20 ports per module, up to 120 users per switch </li></ul><ul><li>100Mbps HSTR links into backbone </li></ul>
    53. 56. Ringswitch Family Widest range of TR and high speed options <ul><li>UTP, STP and Fiber Token Ring support </li></ul><ul><li>Wide choice of high speed options </li></ul><ul><ul><li>with 1.5G switching capacity to support higher speeds </li></ul></ul>GroupSwitch 8-Port TR 4-Port TR 4-Port TR Fiber ATM MMF FDDI HSTR Token Ring High speed
    54. 57. Adapter Strategy <ul><li>Time to market important driving factor for first HSTR adapters </li></ul><ul><li>Madge’s long-term strategy is to make 100Mbps HSTR an affordable desktop technology </li></ul><ul><ul><ul><li>Will allow 4/16/100 adapters to be deployed at 16Mbps, ready for upgrade to 100Mbps </li></ul></ul></ul>
    55. 58. Adapter Family <ul><li>Smart 16/4 Ringnode family </li></ul><ul><ul><ul><li>Performance leading adapter family </li></ul></ul></ul><ul><ul><ul><li>Unique single driver across all adapters - including ISA, PCI, PCMCIA and CardBus </li></ul></ul></ul><ul><ul><ul><li>Widest range of environments supported </li></ul></ul></ul><ul><li>4th generation Madge TR silicon </li></ul><ul><ul><ul><li>Includes support for HSTR </li></ul></ul></ul><ul><ul><ul><li>Very stable silicon & MAC base </li></ul></ul></ul>
    56. 59. New HSTR Adapter <ul><li>Smart 100/16/4 HSTR PCI adapter </li></ul><ul><li>Supports same driver as 16/4 cards </li></ul><ul><ul><ul><li>Very easy upgrade to 100Mbps </li></ul></ul></ul><ul><li>Auto-sensing </li></ul><ul><ul><ul><li>Just plug adapter into HSTR port </li></ul></ul></ul><ul><li>Designed for servers & power-users </li></ul>
    57. 60. Silicon Roadmap <ul><li>5th generation HSTR silicon being developed for desktop applications </li></ul><ul><li>Significantly reduce the price premium for 100Mbps support </li></ul><ul><li>Enable customers to widely deploy HSTR-enabled adapters throughout network ready for upgrade later </li></ul>
    58. 62. A Perspective on Token Ring for the 21st Century
    59. 63. Quality of Service <ul><li>Madge believes that voice, video and data convergence is inevitable </li></ul><ul><li>Quality of Service in the LAN is a key requirement </li></ul><ul><li>Needed for desktop video and multimedia conferencing, mission-critical data apps </li></ul>
    60. 64. QoS on Token Ring <ul><li>Token Ring was designed with QoS in mind from the outset </li></ul><ul><ul><li>Priority is only now being added to Ethernet: requires significant hardware changes </li></ul></ul><ul><li>Token priority scheme allows traffic to be transmitted at up to 8 different priority levels </li></ul><ul><ul><li>High priority, time sensitive traffic gets access to network first </li></ul></ul><ul><li>All TR hardware supports token priority </li></ul><ul><li>Full end-to-end priority requires additional functionality in switches and end-stations </li></ul>
    61. 65. Token Ring’s Built-in Priority Scheme <ul><li>Token priority provides low delay access to shared ring </li></ul><ul><li>Supports good quality voice and video </li></ul>Station currently transmitting Stations waiting to transmit Station with higher priority packet can grab token next
    62. 66. Videoconferencing over Shared Token Ring <ul><li>Assume 30 users per ring </li></ul><ul><li>Assume worst case 20% of users active with videoconferencing </li></ul><ul><li>Assume 350 kbps bandwidth/session </li></ul><ul><li>Total bandwidth used: </li></ul><ul><ul><li>20% x 30 x 350 kbps = 2.1 Mbps </li></ul></ul><ul><li>This is fine for a 16 Mbps ring! </li></ul>
    63. 67. End station QoS software <ul><li>Applications will use RSVP messages to request QoS </li></ul><ul><li>All packets go into the same IP stack </li></ul><ul><li>High priority assigned to packets with QoS </li></ul>IP protocol stack Adapter card driver NDIS 5 Data packets Video packets RSVP messages Priority = 0 Priority = 6
    64. 68. QoS on Token Ring Network Interface NDIS IP Stack Video App Port 1 Port 2 Switching Engine High Priority Queue Low Priority Queue Data App End station Switch
    65. 69. QoS on Token Ring P0 P0 Network Interface NDIS IP Stack Video App Port 1 Port 2 Switching Engine High Priority Queue Low Priority Queue Data App End station Switch
    66. 70. QoS on Token Ring P0 P4 P6 P6 Network Interface NDIS IP Stack Video App Port 1 Port 2 Switching Engine High Priority Queue Low Priority Queue Data App End station Switch
    67. 71. TR-HSTR Solution for QoS <ul><li>Multiple priority queues in each TR switch </li></ul><ul><li>Expedited delivery of high priority traffic </li></ul><ul><li>Adequate QoS for majority applications </li></ul>TR Switch TR Switch TR Switch TR Switch Support for multiple priority queues
    68. 72. Madge TR-HSTR Solution <ul><li>All 802.5 standard TR equipment supports packet priority </li></ul><ul><li>Packet priority is preserved over HSTR </li></ul><ul><li>Smart Ringswitch Plus hardware supports multiple internal queues </li></ul><ul><li>High priority packets get precedence at output ports </li></ul>
    69. 73. When would you use ATM with TR? <ul><li>Urgent need for greater capacity </li></ul><ul><li>Integration of synchronous traffic in campus backbone (e.g. PBX trunks) </li></ul><ul><ul><ul><li>HSTR no substitute for ATM Circuit Emulation </li></ul></ul></ul><ul><li>Extend LAN environment across the WAN </li></ul><ul><ul><ul><li>ATM is directly compatible with wide area transmission technologies such as SONET </li></ul></ul></ul><ul><li>HSTR and ATM will happily co-exist! </li></ul>
    70. 74. Video Conferencing on Token Ring H.320 H.323 H.323 H.320 video conferencing on ISDN standard H.323 video conferencing on the LAN standard WAN ISDN Video room system LAN-Video Gateway
    71. 75. Story not so good for Ethernet users... <ul><li>Ethernet does not have the same priority scheme as Token Ring </li></ul><ul><li>Being added as part of IEEE 802.1p/q </li></ul><ul><li>Changes to Ethernet MAC </li></ul><ul><li>Means installed Ethernet equipment not compatible </li></ul><ul><li>To deploy QoS in Ethernet requires all new equipment </li></ul><ul><li>Yet another complete upgrade for Ethernet! </li></ul>
    72. 76. Comparison with Ethernet Ethernet 802.1p/q desktops 1Gbps in backbone Switched 100Mbps Large frames Smaller shared segments Shared 10Mbps Switched 10Mbps in backbone 100Mbps in backbone Switched 10Mbps to desktop 1980 1998 2000
    73. 77. Token Ring & HSTR The best fit to networking needs Smaller shared segments Shared 10Mbps Switched 10Mbps in backbone 100Mbps in backbone Switched 10Mbps to desktop 1Gbps in backbone Switched 100Mbps 802.1p/q desktops Large frames Token Ring Shared 4Mbps Shared 16Mbps Switched 16Mbps in backbone 1980 1998 2000 HSTR
    74. 78. Network Integration <ul><li>Reality is that most Token Ring networks have Ethernet somewhere </li></ul><ul><li>Technically difficult to connect Ethernet to TR </li></ul><ul><ul><li>Address formats completely different </li></ul></ul><ul><ul><li>Different protocols treat address types differently </li></ul></ul><ul><ul><li>Token Ring supports much larger frame sizes </li></ul></ul><ul><ul><li>What to do with source routing information </li></ul></ul><ul><li>Best way to connect networks is via router, but </li></ul><ul><ul><li>It’s expensive </li></ul></ul><ul><ul><li>There’s a significant performance hit </li></ul></ul><ul><ul><li>Doesn’t solve non-routable protocols problem </li></ul></ul>
    75. 79. Network Integration with 802.1q <ul><li>New IEEE 802.1q standard allows frames of one network technology to be carried by another </li></ul><ul><li>Because HSTR supports bigger frame sizes than Ethernet, HSTR can be used to carry Fast Ethernet frames </li></ul><ul><li>Deploying HSTR in the backbone allows Ethernet and Token Ring to access the same network services </li></ul>
    76. 80. Network Integration with HSTR HSTR & 802.1q used to carry Ethernet frames on backbone Additional 802.1q drivers required in server Fast Ethernet Interface on Smart Ringswitch Plus
    77. 81. Summary <ul><li>Token Ring has built-in support for QoS </li></ul><ul><ul><li>Support for QoS is only a driver update </li></ul></ul><ul><ul><li>HSTR is QoS ready </li></ul></ul><ul><li>Madge products are QoS ready </li></ul><ul><ul><li>Adapters and Switches </li></ul></ul><ul><li>Token Ring is multi-Services ready </li></ul><ul><ul><li>...but it’s a fork lift upgrade for Ethernet desktops </li></ul></ul>
    78. 82. HSTR Performance
    79. 83. www.madge.com
    80. 84. Interest in HSTR
    81. 85. HSTR in Action
    82. 86. HSTR Seminar Highlights
    83. 87. www.madge.com