Re: [dtn] working group last call on draft-ietf-dtn-bpbis

["Templin, Fred L" <[e-mail]>]

Hi, here are my review comments for draft-ietf-dtn-bpbis:

Fred Templin
[e-mail]

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1) Abstract, instead of "This Internet Draft", say: "This document" so that the text can carry
     forward into RFC publication.
2) Page 4, figure 1 is split between two pages. Make it fit onto a single page.
3) Page 4, figure 1, "Trans1" and "Trans3" are unexplained. Are they the same as "T1/T3"?
     Why not just call them "T1" and "T3"?
4) Page 6, "Partial payload" is it the case that payload fragmentation is limited to 2-fragment
     fragmentation, or can it be N-fragment? The definition makes it appear that only 2-fragment
    fragmentation is supported.
5) Page 6, figure 2 is split between two pages. Make it fit onto a single page.
6) Section 3.2, page 14, the sentence: "However, in some environments there may be
    segments of the end-to-end path for which no reliable convergence-layer protocol
    is available; in such environments the use of reliable convergence-layer protocols
    wherever possible can reduce the incidence of data loss." - this seems to be saying
    two contradictory things. It basically seems says: "when no reliable convergence-layer
    protocol is available, use a reliable convergence-layer protocol" which is an
    oxymoron - perhaps a misunderstanding?
7) Section 4.1.5.1, page 18, should there be an informative reference for "dtn:" and "ipn:"?
8) Section 4.2.2, page 22, "Total Application Data Unit Length" only appears if the bundle is
    a fragment. But, does it mean that only "two-fragment" fragmented bundles are possible?
9) Section 4.3.4, page 25, why does it need to include both a hop limit and hop count? Isn't
    it sufficient to just have a hop limit that decrements to 0?
10) Section 5.8, page 32, why is only "2-fragment" fragmentation supported? Why not
    "N-fragment"?
11) Section 6.1.2, figure 6, page 42, change: "No known route destination from here."
    to: "No known route to destination from here."