Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!att!cbnewsj!cbnewsi!kotto
From: kotto@cbnewsi.att.com (karen.otto)
Newsgroups: comp.protocols.tcp-ip
Subject: Resequencing in TCP
Keywords: retransmission, Wollongong
Message-ID: <1991Jan11.161423.17551@cbnewsi.att.com>
Date: 11 Jan 91 16:14:23 GMT
Distribution: usa
Organization: AT&T Bell Laboratories
Lines: 21


I would like to find out how Wollongong TCP does resequencing.
One scenario that has been suggested as likely is that if it 
receives IP packets 1,2,4 it throws 4 away immediately.  Then if 
3 arrives right after 4 is thrown away, the receiving TCP accepts 
3 and states that it is expecting packet 4 and thus packet 4 must be 
retransmitted.  (So basically TCP doesn't accept out-of-sequence 
packets).

I understand that this is implementation dependent.  I am 
particularly interested in the Wollongong implementation, but I 
would also appreciate any information anyone had on any of the 
other implementations out there.

Thank you for any help you can offer, including contacts.


Karen Otto			AT&T Bell Laboratories
karen.otto@att.com		(908)-949-3370

Standard Disclaimer:  All opinions are strictly those of the author.