Routing

• ISP border routers at the IXP generally should NOT be configured with a default route or carry the full Internet routing table

  • Carrying default or full table means that this router and the ISP network is open to abuse by non-peering IXP members
  • Correct configuration is only to carry routes offered to IXP peers on the IXP peering router

• Note: Some ISPs offer transit across IX fabrics

  • They do so at their own risk – see above

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