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The Great (Public vs. Private) Peering Debate

The Great (Public vs. Private) Peering Debate. Peering at 10G. William B. Norton Co-Founder & Chief Technical Liaison Equinix, Inc. RIPE 50 – Stockholm EIX-WG May 5, 2005. wbn@equinix.com. Research Question. Does 10Gbps Public Peering make sense financially?

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The Great (Public vs. Private) Peering Debate

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  1. The Great (Public vs. Private) Peering Debate Peering at 10G William B. Norton Co-Founder & Chief Technical Liaison Equinix, Inc. RIPE 50 – Stockholm EIX-WG May 5, 2005 wbn@equinix.com

  2. Research Question • Does 10Gbps Public Peering make sense financially? • Private Peering (GigE) is the next best alternative • Perception: 10G router HW is too expensive • 10G Public vs. 1G Private Peering

  3. Public Peering Model P P ISP Gear IX sw P • Router w/ 2 10Ge Interface Card • 10G Public Peering Port • Colo Modeling… R 10G 10G : Assumption: We are ignoring the transport cost into the IX

  4. 10G Public Peering Modeling Assumptions 1) 10G Public Peering Port at IX: $10,000 per month 2) Colocation: $1,000 per month 3) $20,154 per month Assumption: 36 month amortization of capital equipment

  5. 10G Public Peering Scaling Add 2nd 10GEs Assumption: Aggregation Efficiency ~1.5:1

  6. Graphically Assumption: If Peering towards 10G, probably buying transit ~$10/Mbps

  7. Private Peering Model P P ISP Gear P • Router w/10G NICs • 10G Public Peering Port • Colo R sw 10G 10G : Add Private Peering Switch

  8. Scaling 1G Private Peering

  9. Graphically

  10. Religion: Public Peering is Better than Private Peering • Aggregation Benefits • Peaks+Valleys=Efficiency • Large Gradations=headroom • Ease of Administration • Easy+Fast • Trial Peering • No additional Cost/No Signing Authority • Financial Predictability • Scales Large (950M) Peering Sessions • Public Peering as Selection Criteria

  11. Religion: Private Peering is Better than Public Peering • Easier to Monitor • No NetFlow needed! • No Blind Over Subscription Problem • More Secure • Cheap • $200/40Mbps =$5/Mbps • More Reliable + Easier to Debug • Signals a more attractive peer

  12. Religion: Hybrid Approach • Publicly peer small sessions • Privately peer large sessions at 40% • Vijay Gill’s Peering Lifecycle Argument • Publicly Peer w/anyone • Large Peers to Privates • Peer with peer’s peers • More selective to get benefits • Depeer to reduce ops load • Exclusively privately peer Some debate here

  13. Bottom Line: Public 10G vs. Private 1G early break even points • Similar curves, early break even points (2 peering sessions) • As traffic grows, difference shrinks • European 10G IX Port Fees are less

  14. What if 10G Port costs $4400/mo? Public Peering Ease of Administration Watch Assumptions: Cost of 10G HW Dropping Sub 10G Architecture

  15. Transition Peering Dynamics Historically, two competing dynamics here… Peering migrates • Move Public  Private Peering • Can’t afford the 10G router – let’s private peer • Move Private  Public Peering • Can’t trunk or load share across 2 Privates

  16. Acknowledgements Ren Provo (SBC), Richard Steenbergen (nLayer), James Rice (LoNAP), Todd Underwood (Renesys), Stephen Wilcox (TeleComplete), Vanessa Evans (LINX), Niels (ANS-IX), Chris Malayter (TDS Telecom), Patrick Gilmore (Akamai), Frank Orloski (T-Systems), Vijay Gill (AOL), Vish Yelsangikar (NetFlix), Nathan Hickson (eBay), Steve Feldman (CNet), Lane Patterson (Equinix), Joy Fender, Falk Bornstaedt (T-Systems), Remco Donker (MCI), Danny McPhearson (Arbor Networks

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