Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet

Folks,

Fernando presents two studies in <http://www.iepg.org/2013-11-ietf88/fgont-iepg-ietf88-ipv6-frag-and-eh.pdf>. The second study is more interesting to me, because duplicate addresses are removed.

The following are a few questions regarding Fernando's second study:

1) Fernando observes that 41% of sites discard fragmented packets. However, in a similar study (http://www.nlnetlabs.nl/downloads/publications/pmtu-black-holes-msc-thesis.pdf) only 10% of sites discarded fragmented packets. I wonder why the two studies yield such divergent results.

2) Fernando observes that 44% of sites discard packets containing an 8 byte destination header, while 89% of sites discard packet containing 1 kilobyte of extension headers. Because the first number (44%) is so high, can I conclude that the second (89%) is insignificant.

Could it be that extension header length is a non-issue, because so many sites filter packets containing extension headers, regardless of their length?

                                                          Ron

> -----Original Message-----
> From: ipv6-bounces@ietf.org [mailto:ipv6-bounces@ietf.org] On Behalf Of
> Fernando Gont
> Sent: Monday, November 04, 2013 6:02 PM
> To: 6man@ietf.org; IPv6 Operations
> Subject: Some stats on IPv6 fragments and EH filtering on the Internet
> 
> Folks,
> 
> I did a presentation on the topic at the IEPG meeting earlier this
> week.
> It provides some concrete data regarding IPv6 fragmentation and
> Extension Header filtering on the Internet.
> 
> The slideware is available at:
> <http://www.iepg.org/2013-11-ietf88/fgont-iepg-ietf88-ipv6-frag-and-
> eh.pdf>
> 
> Certainly there's *much* more work to be done in this area, but I
> thought that this could be good food sfor some of the discussions that
> we were having on the topic.
> 
> Thanks,
> --
> Fernando Gont
> e-mail: fernando@gont.com.ar || fgont@si6networks.com PGP Fingerprint:
> 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1
> 
> 
> 
> --------------------------------------------------------------------
> IETF IPv6 working group mailing list
> ipv6@ietf.org
> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6
> --------------------------------------------------------------------
> 