A first look at the effects of the Ebone shutdown

1
A first look at the effects of the Ebone
shutdown

• Henk Uijterwaal and René Wilhelm
• RIPE NCC
• 12 November 2009

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KPNQwest

• Build a network of fibers in Europe
• Including take-overs and mergers
• Ebone network
• Typical dot com
• Huge debts
• Few paying customers
• Creative bookkeeping
• Filed for bankruptcy on May 31
• Former Ebone network to be shut down first
• July 2, in the morning
• Next major shutdown planned for July 19

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RIPE NCC Test-Traffic Measurements

• RIPE NCC Service to measure one-way delays and
  losses
• Measurement stations all over the world
• Full mesh
• Some 2,000 paths that might include the Ebone
  network

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TTM data

• Network alarms
• Monitors incoming delays
• 2 averages Long (30 days) and short (15 minutes)
• Warns operator (and us) if recent delays are
  outside the expected range
• Delay and Loss plots

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Delay and Loss plots, format
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Delay and Loss plots, format

• Delay
• Top left
• X-axis Time of day (July 02 000 July 03 000,
  GMT)
• Y-axis and black dots Delay in ms for individual
  packets
• Red dots hops times 10
• Delay distribution
• Top right
• Loss
• Bottom right
• X-axis Time of day
• Y-axis of packets that arrived over 15 minutes
  100-loss

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Number of alarms per day
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Number of alarms per hour
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Individual connections

• Is the Internet still working?
• Expect
• No connection
• Rerouting
• Other effects
• Went through all plots for that day

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No connection
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No connection (2)
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No connection (3)
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Major re-routing
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Major re-routingMunich-New York
15
Major re-routingMunich San Jose New York
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Shutdown of the wrong line
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The network is getting slower
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The network is getting slower (2)
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Overloading of old equipment
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Overloading of old equipment
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Is everybody unhappy then?No, better backup path
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Summary

• The Internet is still working!
• Not as good as before though
• Connection lost on 1 path out of 2116
• Lots of re-routing
• Unstable routes for 30 to 150 minutes
• Sub-optimal paths afterwards
• Lots of connections became slower
• Business opportunity for 400 M
• More fun expected this Friday

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Questions, Discussion