[dtn-interest] Comments on draft-irtf-dtnrg-dgram-clayer-00
Elwyn Davies <elwynd@folly.org.uk> Mon, 14 January 2013 19:19 UTC
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From: Elwyn Davies <elwynd@folly.org.uk>
To: DTN interest <dtn-interest@irtf.org>
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Date: Mon, 14 Jan 2013 19:17:35 +0000
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Subject: [dtn-interest] Comments on draft-irtf-dtnrg-dgram-clayer-00
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Comments on DGRAM convergence layer draft (draft-irtf-dtnrg-dgram-clayer-00): Issues: s2: > TCP, a logical choice, guarantees reliability and provides congestion > control. Congestion control is vital to the continued functioning of > the Internet, particularly for situations where data will be sent at > arbitrarily fast data rates. Because the Bundle Protocol offers > neither congestion control nor reliability, TCP is the RECOMMENDED > choice for its encapsulation. draft-irtf-dtnrg-tcp-clayer > [I-D.irtf-dtnrg-tcp-clayer] defines the method for transporting > bundles over TCP. It strikes me that if we are going to RECOMMEND TCP then this statement belongs in the TCP document rather than here. Actually what we doing is not really RECOMMENDING it but pointing out that you can build a simple congestion-friendly CL over a TCP transport with particular characteristics (reliability, in-order delivery, etc) - but if you have a convergence layer that already has some of the characteristics of TCP then you don't need to (indeed, should absolutely not) use TCP as transport as you will get conflict. Editorial/Nits: s3.1: Probably worth an aside to record that jumbograms are mostly of the pink elephant variety. s3.2, para 1: Should include that the recommendation for TCP or LTP applies to IP based networks only. There are other networks... Bluetooth, AX25, etc. s3.3, last line: s/every LTP segments/every LTP segment/ Regards, Elwyn
- [dtn-interest] Comments on draft-irtf-dtnrg-dgram… Elwyn Davies