Updated Specification of the IPv4 ID Field
RFC 6864
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Type |
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RFC - Proposed Standard
(February 2013; No errata)
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Last updated |
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2015-10-14
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Replaces |
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draft-touch-intarea-ipv4-unique-id
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Stream |
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IETF
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plain text
pdf
html
bibtex
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Reviews |
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WG state
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Submitted to IESG for Publication
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Document shepherd |
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Julien Laganier
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Shepherd write-up |
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Show
(last changed 2012-05-03)
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| IESG |
IESG state |
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RFC 6864 (Proposed Standard)
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Consensus Boilerplate |
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Unknown
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Telechat date |
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Responsible AD |
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Brian Haberman
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IESG note |
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The Document Shepherd is Julien Laganier (julien.ietf@gmail.com).
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Send notices to |
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draft-ietf-intarea-ipv4-id-update.notify@ietf.org
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Internet Engineering Task Force (IETF) J. Touch
Request for Comments: 6864 USC/ISI
Updates: 791, 1122, 2003 February 2013
Category: Standards Track
ISSN: 2070-1721
Updated Specification of the IPv4 ID Field
Abstract
The IPv4 Identification (ID) field enables fragmentation and
reassembly and, as currently specified, is required to be unique
within the maximum lifetime for all datagrams with a given source
address/destination address/protocol tuple. If enforced, this
uniqueness requirement would limit all connections to 6.4 Mbps for
typical datagram sizes. Because individual connections commonly
exceed this speed, it is clear that existing systems violate the
current specification. This document updates the specification of
the IPv4 ID field in RFCs 791, 1122, and 2003 to more closely reflect
current practice and to more closely match IPv6 so that the field's
value is defined only when a datagram is actually fragmented. It
also discusses the impact of these changes on how datagrams are used.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6864.
Touch Standards Track [Page 1]
RFC 6864 Updated Spec. of the IPv4 ID Field February 2013
Copyright Notice
Copyright (c) 2013 IETF Trust and the persons identified as the
document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction ....................................................3
2. Conventions Used in This Document ...............................3
3. The IPv4 ID Field ...............................................4
3.1. Uses of the IPv4 ID Field ..................................4
3.2. Background on IPv4 ID Reassembly Issues ....................5
4. Updates to the IPv4 ID Specification ............................6
4.1. IPv4 ID Used Only for Fragmentation ........................7
4.2. Encouraging Safe IPv4 ID Use ...............................8
4.3. IPv4 ID Requirements That Persist ..........................8
5. Impact of Proposed Changes ......................................9
5.1. Impact on Legacy Internet Devices ..........................9
5.2. Impact on Datagram Generation .............................10
5.3. Impact on Middleboxes .....................................11
5.3.1. Rewriting Middleboxes ..............................11
5.3.2. Filtering Middleboxes ..............................12
5.4. Impact on Header Compression ..............................12
5.5. Impact of Network Reordering and Loss .....................13
5.5.1. Atomic Datagrams Experiencing Reordering or Loss ...13
5.5.2. Non-atomic Datagrams Experiencing
Reordering or Loss .................................14
6. Updates to Existing Standards ..................................14
6.1. Updates to RFC 791 ........................................14
6.2. Updates to RFC 1122 .......................................15
6.3. Updates to RFC 2003 .......................................16
7. Security Considerations ........................................16
8. References .....................................................17
8.1. Normative References ......................................17
8.2. Informative References ....................................17
9. Acknowledgments ................................................19
Touch Standards Track [Page 2]
RFC 6864 Updated Spec. of the IPv4 ID Field February 2013
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