> 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
> To: Randy Bush
> 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 9.641266
> 500 9.341039
> 1000 9.941298
> 1240 9.941308
> 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