> be sure to understand footnote. almost 10% of the atlas probes which > think they have ipv6 connectivity actually do not. so one has to > subtract that 9.94% from all entries in fail% column. > > if you are unfamiliar with the ncc atlas project, grab your board and go > to https://atlas.ripe.net/
I don't quite understand what he is testing? just sending large packets? or as the subject says, fragmented packets? or path MTU discovery? cheers, Ole > Message-ID: <5223a4ce.9090...@ripe.net> > Date: Sun, 01 Sep 2013 22:34:22 +0200 > From: Emile Aben <emile.a...@ripe.net> > To: Randy Bush <ra...@psg.com> > CC: na...@nanog.org > Subject: Re: IP Fragmentation - Not reliable over the Internet? > > On 31/08/2013 13:13, Randy Bush wrote: >> could you please test with ipv6? > > This is what I see for various IPv6 payloads (large ICMPv6 echo > requests) from all RIPE Atlas probes that where available at the time to > a single "known good" MTU 1500 destination: > > plen fail% nr_probes > 100 9.64 1266 > 500 9.34 1039 > 1000 9.94 1298 > 1240 9.94 1308 > 1241 11.62 1300 > 1440 12.70 890 > 1441 14.70 1306 > 1460 15.18 1304 > 1461 19.84 1290 > 1462 22.02 1294 > > plen: IPv6 payload length (ie. not including 40byte IPv6 header) > fail%: percentage of probes that didn't get any of the 5 pkts that were > sent. Note that there is a large baseline failure rate in IPv6 on RIPE > Atlas probes [1], which would explain the ~10% failure rate for the > smaller packets. > > I plan to do more analysis and start writing this up on RIPE Labs over > the next few days. > > cheers, > Emile Aben > RIPE NCC > > > [1] > https://labs.ripe.net/Members/stephane_bortzmeyer/how-many-atlas-probes-believe-they-have-ipv6-but-are-wrong > _______________________________________________ > v6ops mailing list > v6...@ietf.org > https://www.ietf.org/mailman/listinfo/v6ops
signature.asc
Description: Message signed with OpenPGP using GPGMail
-------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
