Why use an Exchange Point?

• Routers are attached to exchange traffic

• MLPA, bilateral, customer/transit relationships

• Examples in U.S:

  • AADS
  • Mae-East/Mae-West
  • Pacbell
  • PAIX

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- Routers are attached to exchange point medium.

- Various types of peering relationships are possible at an exchange point

- MLPA - multi-lateral peering agreement

(every peer agrees to peer with every other peer)

- Bilateral - exchange of information between two peers

- Customer - one ISP provides transit for another

- Route Server - third-party bilateral peering

- Cheaper and more efficient than setting up multiple private exchanges.