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Some interesting results from RIPE Atlas

Some interesting results from RIPE Atlas. Philip Homburg RIPE NCC. Intro. For some measurements you need as many sources as possible, dozens are just not enough. RIPE Atlas provides measurement capability from close to 2000 (and growing) vantage points.

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Some interesting results from RIPE Atlas

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  1. Some interesting results fromRIPE Atlas • Philip Homburg • RIPE NCC

  2. Intro • For some measurements you need as many sources as possible, dozens are just not enough. • RIPE Atlas provides measurement capability from close to 2000 (and growing) vantage points. • Here are some results about what we can see…

  3. Connectivity to 128.0/16 • The prefix 128.0/16 is filtered in Juniper devices up to and including JUNOS version 11.1. • We looked at three ways to get a rough estimate on how much filtering of 128.0/16 is going on on the Internet. • We tracked this over time (2011-12 – 2012-07). • We contacted holders of AS-es where we detected filtering.

  4. Connectivity to 128.0/16

  5. Visualising IPv6 traceroutes • Atlas allows any RIPE NCC member to trace to their IPv6 targets from all IPv6 capable probes • We added a (prototype) visualisation for these results • It’s interactive, you can explore the successful and unsuccessful paths, look at the actual traces, etc. • One example shown here: traceroute to ns.ripe.net

  6. Visualising IPv6 traceroutes Successful paths (ASNs):

  7. Visualising IPv6 traceroutes Unsuccessful paths (ASNs):

  8. Comparing UDP and TCP on root servers • We’ve been measuring performance of UDP and TCP against root DNS servers for a long time. • Some of you asked us to compare them, so we did! • Performance expectation for the same query, against the same server, UDP vs. TCP: • response_time(TCP) = 2*response_time(UDP) • With UDMs, it’s possible to do this against any name server!

  9. Comparing UDP and TCP on root servers k-root

  10. Comparing UDP and TCP on root servers i-root

  11. Comparing UDP and TCP on root servers

  12. In-transit Modification of DNS Responses Soon on RIPE Labs

  13. Further information: • https://atlas.ripe.net/ • https://labs.ripe.net/Members/dfk/128.0-16-seen-by-atlas • https://labs.ripe.net/Members/emileaben/visualise-your-ipv6-connectivity-using-ripe-atlas

  14. Questions?

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