Hi. With the exception of packet diagrams, I think all the examples you bring up benefit significantly from clear textual description. I believe I'd think that even if I could see the diagrams and I believe I have enough experience with visualization (although not sight) to be confident in that belief. As such, I don't believe these diagrams should be normative. I actually thin that many of the tunnel overlay network documents (PWE3, L2VPN, L3VPN) could benefit significantly from more focus on the text of the descriptions of situations being described. If you believe that normative documents are required, I'd like you to explain why the diagrams cannot be described in the text, why doing so would decrease the quality of the specification, or why doing so would not be a useful investment in our time. _______________________________________________ Ietf@xxxxxxxx https://www1.ietf.org/mailman/listinfo/ietf