I propose RSSAC caucus explore an understanding of the MTU, MSS and fragmentation behaviour of all instances of the roots, in IPv6 and IPv4. If we had this data, we would be able to understand if what we see with any given instance of query to a root was local, or more likely along the path. Some evidence from random query tests suggests both that there is no consistency between the root operators, and some inconsistency within a given root letter, depending on where you query goes, or what protocol you use. Because of the increase in TCP, and packetsizes in responses, this is of interest because of the exposure to fragmentation, or loss of pMTU signalling, or the variances in MSS/TCP against interface MTU and UDP. This question has a quality which goes to "only the root operators can say" which is why it feels to me like a well-formed question for the caucus to consider, which implies RSSAC taking it on board to ask the root operators about. -George