I-D Action: draft-briscoe-intarea-ipv4-id-reuse-03.txt
internet-drafts@ietf.org Mon, 15 July 2013 23:45 UTC
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Subject: I-D Action: draft-briscoe-intarea-ipv4-id-reuse-03.txt
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Date: Mon, 15 Jul 2013 16:45:30 -0700
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A New Internet-Draft is available from the on-line Internet-Drafts directories. Title : Reusing the IPv4 Identification Field in Atomic Packets Author(s) : Bob Briscoe Filename : draft-briscoe-intarea-ipv4-id-reuse-03.txt Pages : 25 Date : 2013-07-15 Abstract: This specification takes a new approach to extensibility that is both principled and a hack. It builds on recent moves to formalise the increasingly common practice where fragmentation in IPv4 more closely matches that of IPv6. The large majority of IPv4 packets are now 'atomic', meaning indivisible. In such packets, the 16 bits of the IPv4 Identification (IPv4 ID) field are redundant and could be freed up for the Internet community to put to other uses, at least within the constraints imposed by their original use for reassembly. This specification defines the process for redefining the semantics of these bits. It uses the previously reserved control flag in the IPv4 header to indicate that these 16 bits have new semantics. Great care is taken throughout to ease incremental deployment, even in the presence of middleboxes that incorrectly discard or normalise packets that have the reserved control flag set. The IETF datatracker status page for this draft is: https://datatracker.ietf.org/doc/draft-briscoe-intarea-ipv4-id-reuse There's also a htmlized version available at: http://tools.ietf.org/html/draft-briscoe-intarea-ipv4-id-reuse-03 A diff from the previous version is available at: http://www.ietf.org/rfcdiff?url2=draft-briscoe-intarea-ipv4-id-reuse-03 Internet-Drafts are also available by anonymous FTP at: ftp://ftp.ietf.org/internet-drafts/
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