> From: Suresh Krishnan <[EMAIL PROTECTED]> > If I add the word intermediate in the text in order to read > > " This document proposes that all IPv6 extension headers be encoded in > a consistent TLV format so that it is possible for intermediate nodes > to skip over unknown extension headers and continue to further > process the header chain."
But, but... how can intermediate skip over "unknown extension header", if it doesn't know the header. The part of draft, that proposes new extension headers follow the TLV format is OK. Although, I have always assumed that this was already implicit or even specified. If not, the draft could be seen as an emendation to the existing drafts. What irks me, is the talk of intermediates skipping "unknowns", which depends on them somehow recognizing the header as "extension header". But, if they recognize it, it is not *unknown* anymore. Seems to be a "thought loop". For your "skipping scheme" to work, then *ALL* headers would need some special bit in exactly the same location, and this bit would tell whether header is an extension header or not. So, to make your draft complete, you would also need to enforce that *ALL* new headers extension or not, will have this bit reserved for the purpose. This may be a bit too much to define at this point... -------------------------------------------------------------------- IETF IPv6 working group mailing list ipv6@ietf.org Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 --------------------------------------------------------------------
