Updated Specification of the IPv4 ID Field
draft-ietf-intarea-ipv4-id-update-06
| The information below is for an old version of the document | |||
|---|---|---|---|
| Document | Type | Active Internet-Draft (intarea WG) | |
| Last updated | 2012-11-26 (latest revision 2012-10-09) | ||
| Replaces | draft-touch-intarea-ipv4-unique-id | ||
| Stream | IETF | ||
| Intended RFC status | Proposed Standard | ||
| Formats | plain text pdf html bibtex | ||
| Stream | WG state | Submitted to IESG for Publication | |
| Document shepherd | Julien Laganier | ||
| Shepherd write-up | Show (last changed 2012-05-03) | ||
| IESG | IESG state | IESG Evaluation::Revised I-D Needed | |
| Consensus Boilerplate | Unknown | ||
| Telechat date |
Needs a YES. Needs 9 more YES or NO OBJECTION positions to pass. |
||
| Responsible AD | Brian Haberman | ||
| IESG note | The Document Shepherd is Julien Laganier (julien.ietf@gmail.com). | ||
| Send notices to | intarea-chairs@tools.ietf.org, draft-ietf-intarea-ipv4-id-update.notify@tools.ietf.org | ||
Internet Area WG J. Touch
Internet Draft USC/ISI
Updates: 791,1122,2003 October 9, 2012
Intended status: Proposed Standard
Expires: April 2013
Updated Specification of the IPv4 ID Field
draft-ietf-intarea-ipv4-id-update-06.txt
Status of this Memo
This Internet-Draft is submitted to IETF in full conformance with the
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This Internet-Draft will expire on April 9, 2013.
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Internet-Draft Updated Spec. of the IPv4 ID Field October 2012
Copyright Notice
Copyright (c) 2012 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
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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/destination/protocol tuple. If enforced, this uniqueness
requirement would limit all connections to 6.4 Mbps. 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 RFC791, RFC1122,
and RFC2003 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.
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. Encourage 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
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