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RFC 4963
Title: IPv4 Reassembly Errors at High
Data Rates
Author: J. Heffner, M. Mathis,
B. Chandler
Status: Informational
Date: July 2007
Mailbox: jheffner@psc.edu,
mathis@psc.edu,
bchandle@gmail.com
Pages: 10
Characters: 22399
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-heffner-frag-harmful-05.txt
URL: http://www.rfc-editor.org/rfc/rfc4963.txt
IPv4 fragmentation is not sufficiently robust for use under some
conditions in today's Internet. At high data rates, the 16-bit IP
identification field is not large enough to prevent frequent
incorrectly assembled IP fragments, and the TCP and UDP checksums are
insufficient to prevent the resulting corrupted datagrams from being
delivered to higher protocol layers. This note describes some easily
reproduced experiments demonstrating the problem, and discusses some
of the operational implications of these observations. This memo provides information for the Internet community.
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