Routing Beacons

of 20 /20
Henk Uijterwaal <[email protected]> . IEPG, June 14, 2022 . http:// 1 Routing Beacons Henk Uijterwaal RIPE NCC New Projects Group IEPG June 14, 2022

Embed Size (px)


Routing Beacons. Henk Uijterwaal RIPE NCC New Projects Group IEPG November 8, 2014. Motivation. Lots of studies looking at route flapping, flap dampening, BGP behavior under stress, … Craig Labovitz et al, SIGCOMM 2000 Morley Mao et al, SIGCOMM 2002 … - PowerPoint PPT Presentation

Transcript of Routing Beacons

  • Routing BeaconsHenk Uijterwaal RIPE NCC New Projects GroupIEPG*

  • MotivationLots of studies looking at route flapping, flap dampening, BGP behavior under stress, Craig Labovitz et al, SIGCOMM 2000Morley Mao et al, SIGCOMM 2002

    Most of these studies require prefixes that are announced or withdrawn at known times

    This is known as a BGP Beacon

  • RIPE NCC RISLimited amount of beacons available so-far2 or 3, usually for a limited time

    RIPE NCC RIS has 9 route collectors all over the world

    Got a /19 for this

    Assigned a /24 to each collector

  • BGP BeaconsAnnounced at 0, 4, 8, 12, 16, 20 GMTWithdrawn at 2, 6, 10, 14, 18, 22 GMTActive since 30/9/2002Data at:

    Prefix 195.80.(224+n).0/24N=0 8 for the 9 route collectors

  • All Beacons

  • First look at the dataFirst results:Code written on a transatlantic flightNot thoroughly checkedRIS beacons onlyAll disclaimers apply

    October 2002 data

    Not all prefixes had transit at the start

  • Definition of an eventAll BGP updates for a prefix seen by a peer when a prefix is announced or withdrawnAnnounce eventsWithdraw eventsParameters:Tstart: MIN (time of first BGP update, 7200)Tend: MIN (time of last BGP update, 7200)# BGP updates seenMinimum AS path lengthMaximum AS path lengthFinal AS path length

  • Number of BGP updates per event Remote Local Remote Local

  • Latency for first BGP update

  • Latency for last BGP update

  • Time that a prefix is unstable(Tend-Tstart)

  • Propagation of announce events(Color=RRC, Shape=Prefix)

  • Propagation of withdraw events(Color=RRC, Shape=Prefix)

  • Path lengthafter announce and during withdraw

  • ConclusionLatency roughly consistent with previous studiesSame effect for path expansions as previous studies

    Lots of questions, lots of work left

  • Other new stuff from the RIPE NCC

  • RISIPv6 routing tables are now being collectedHistory of the IPv6 routing tableRaw data onlyAbout 350 prefixes

    ResultsHot spots webpageMartians, the list you dont want to be on

  • Test Traffic MeasurementsOne way delay measurements, need synchronized clocksGPS hard to installCDMA recently became availableNeeds clock signal, from base stationsNo need to see the skyUS, Australia, Korea, Clock is more expensive, installation much cheaperContact me for details

  • IPv6 versionIPv6 networks so-farTunneled over v4Performance monitoring was an afterthoughtSeveral native IPv6 network now operationalInterested in performance measurements from the startUse existing products: RIPE NCC TTMPortingShipping in December

  • Questions, Discussion