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Initial Design of the TFN Regional Fiber Network

This document discusses the key topics covered at the workshop, including defining mission, buy vs. build decisions, cost considerations, and vendor selection for the TFN Regional Fiber Network project.

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Initial Design of the TFN Regional Fiber Network

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  1. Initial Design of the TFN Regional Fiber Network The Quilt Optical Workshop June 22, 2004 pschopis@oar.net

  2. Topics • First Cut • Defining Mission • Buy or Build • Getting your Ducks in a row - Which Vendor • Tipping Points

  3. First Cut • Everyone is doing it • Is there a solid business case? • What are the costs of provisioned services vs. owning your own fiber plant • Does it fit within scope of primary mission • Does it serve the primary stake holders in your community? • We have 91 member institutions • 10 I2 members • 25 SEGP

  4. Defining Mission • So what do you want this thing to do? • Reduce long term costs • It appears that long term costs can be contained by making large upfront capital investment • Allow dedicated light paths through regional fabric • Research community believes that Lambda based service provides resource that other mechanisms don’t • Allow interaction with other Gigapops and entities in a dedicated fashion (HOPI?) • Problem inter vendor compatibility

  5. Buy or Build? • Rule of thumb: It costs 50K in urban environment and 40K per mile in rural • Based on this Ohio could have built 84 miles urban or 105 miles rural • We bought (IRU) 1600 miles for ~$4,200,000 e.g. about 2625 (Average price) • Primary Wiltel and AEP • Others Qwest, AFS, Buckeye Telcom, and CityNet

  6. Getting Ducks in A Row • TFN uses SBC as integrator • Get the target off our back • Primarily looked at Nortel vs Cisco • We did talk to other vendors • SBC’s staff seemed fairly objective • We require production service e.g. we are a little reluctant to go to far out of the box • Due to size of state and budget went with Cisco ONS 15454

  7. Tipping Points • Nortel • Primary caveat too expensive and lack of flexibility • Went with Cisco Transponder (G.709) based service • Good - Less expensive in short term; uses FEC for greater reach; leverage Layer 2&3 for resiliency • Bad - adding Sonet or RPR later adds cost to that service • Going with Cisco has caveats • They insist on providing complete solution

  8. General Principles • We used full 15454 implementation • Used the AMP and that go into 15454 • Makes management uniform • Makes certain aspects of sparing easier • We over engineered by 4% to 10% for degradation • Accounts for aging fiber (aerial) • Accounts for fiber cuts • Constrained only by fiscal considerations

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