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NANOG Meeting Presentation Abstract

BGP: Good MEDs Gone Bad!
Meeting: NANOG29
Date / Time: 2003-10-21 10:00am - 10:30am
Room: Salons A-E
Presenters: Speakers:
Danny McPherson, Arbor Networks.
Abstract: This presentation provides an overview of the BGP MED attribute:

  • What are MEDs?

  • Potatoes (cold, hot, mashed)

  • Deriving MED values

  • Why MEDs break with aggregation

  • MEDs from different ASes


    • Different policies

    • Different IGPs

    • Implementation caveats


      • No MED v. MED 0

      • MEDs with confeds

      • To advertise or not to advertise (BGP spec adv. rules)




  • MEDs and persistent route oscillation (RFC 3345)

  • The effect of MEDs on BGP updates

    • IGP link flap = MED churn, domino effect



  • Effects of attributes on BGP update packing and convergence

Files: youtubeBGP: Good MEDs Gone Bad!
pdfDanny McPherson Presentation(PDF)
Sponsors: None.

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