BGP Route Selection ...

• Shortest AS-path length

  number of ASes in the AS-path attribute
  

• Lowest origin

  IGP < EGP < INCOMPLETE
  

• Lowest MED

  between paths from same AS
  

• External over internal

  closest exit from a router
  

• Closest next-hop

  Lower IGP metric, closer exit from as AS
  

• Lowest router-id

• Lowest IP address of neighbor

Previous slide

Next slide

Back to first slide

View graphic version