[ This is a outcome of some online&offline discussions we have had on IETF8 ] There are some ongoing efforts to measure IPv6 extension headers filtering in the Internet (in particular, see Fernando Gont's talk: http://www.iepg.org/2013-11-ietf88/fgont-iepg-ietf88-ipv6-frag-and-eh.pdf ) While individuals are running some experiments from their networks, I think it would be extremely useful to run distributed measurements using Atlas to understand the current situation and possible impact better. Therefore it would be great if Atlas supports: - inserting Ipv6 extension headers into probe packets. Ideally user should be allowed to define a chain of extension headers as specified in RFC2460. In particular, it would be nice to insert the following headers: -- Hop-by-Hop Options -- Fragment -- Destination Options - HTTP measurements (Tim, please add particular requirements if you have any). If anyone else would like to see such features supported by Atlas - please speak up! -- SY, Jen Linkova aka Furry