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Strongest arguments on each side Understanding the Public vs. Private Peering Debate ©2012 DrPeering Interna9onal Licensed material – [email protected] h?p://DrPeering.net

07 public vs-private-peering-debate

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Page 1: 07 public vs-private-peering-debate

Strongest  arguments  on  each  side  

Understanding  the

Public vs. Private Peering Debate

©2012  DrPeering  Interna9onal  Licensed  material  –  [email protected]  h?p://DrPeering.net  

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Which  is  be?er:  Public  or  Private  Peering?  

•  Many  strongly  held  (almost  religious)  views  •  The  “Great  Debate”  •  Top  3  Reasons  Public  Peering  is  be?er  •  Top  3  Reasons  Private  Peering  is  be?er  

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                REASONS  PUBLIC  PEERING  IS  BETTER  THAN  PRIVATE  PEERING  

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1.  Aggrega9on  Benefits  of  Public  Peering  

•  Many  small  peers  for  a  single  port  cost  –  Private  peering  requires  cross  connects  and  interface  cards  

•  Peaks  and  valleys  offset  –  2.5:1  aggrega9on  benefits  

•  Large  grada9ons  of  port  sizes  10Mbpsà100Mbpsà1Gbpsà10Gbps  –  Scales  well  

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PUBLIC  PEERING  IS  BETTER  

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2.  Public  Peering  Administra9on  is  Easier  

•  No  physical  work  to  turn  up  new  peer  –  So_  config  on  both  sides  –  Private  peering  requires  two  sides  to  agree,  order  and  test  cross  connect,  who  pays  for  XC?  

•  Trial  peering  easier  •  No  budget  approval  required  to  add  peer  

•  Financial  predictability  •  Scales  seamlessly  

–  10G  for  many  ~1G  sessions   5  

PUBLIC  PEERING  IS  BETTER  

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3.  Customers  like  Public  peering  

•  Customers  ask  about  peering  

•  Community  building  •  Cost-­‐effec9ve  across  mul9ple  colos  

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PUBLIC  PEERING  IS  BETTER  

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                REASONS  PRIVATE  PEERING  IS  BETTER  THAN  PUBLIC  PEERING  

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1.  Private  Peering  Sessions  are  Easier  to  Monitor  

•  SNMP  Counters  on  interface  

•  No  blind  oversubscrip9on  problems  

•  Some  ISPs  require  migra9on  to  private  peering  when  public  reaches  40%  U9liza9on  

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PRIVATE  PEERING  IS  BETTER  

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2.  Private  Peering  is  very  cost  effec9ve  

•  Example:  $800/mo  for  cross  connect  and  port  on  router  

•  $800/4Gbps=$0.50/Mbps  

•  Peering  follows  80%/20%  rule  –  20%  of  the  peer  generate  80%  of  the  valuable  peering  traffic  

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PRIVATE  PEERING  IS  BETTER  

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3.  Private  Peering  is  more  reliable  and  easier  to  debug  

•  Fewer  ac9ve  electronics  •  Less  variability  across  peering  points  

•  Public  peering  can  easily  break  –  Connected  to  other  fabrics  –  Unannounced  ac9vi9es  bring  down  your  peering  

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PRIVATE  PEERING  IS  BETTER  

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4.  Private  Peering  sessions  are  more  secure  

•  Only  connect  to  those  with  a  prior  contract  

•  No  traffic  stealing,  poin9ng  default  

•  Less  likely  to  be  compromised  without  knowledge  

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PRIVATE  PEERING  IS  BETTER  

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5.  Private  Peering  signals  a  more  desirable  peer  

•  The  big  players  peer  privately  

•  They  all  know  who  the  important  peers  are  

•  “If  you  think  that  public  peering  is  a  good  idea,  your  just  not  big  enough  yet.”  

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PRIVATE  PEERING  IS  BETTER