We might trip over this one at some point, so I figured it is worth placing in the archive. ....Roy
Last Monday, I sent a message announcing that a specific bug was fixed in Windows 2000 since SP1, and I was wrong: > > While it it true that Windows NT and Windows 2000 both implement > > Fast Retransmit, in many cases, due to a bug in the implementation, > > Fast Retransmit is never invoked, and the TCP sender has to wait > > for a Retransmit Timeout to retransmit a lost packet. This is > > discussed in more detail in the TBIT paper by Padhye and Floyd, > > available from "http://www.aciri.org/tbit/";. > > The bug occurred in Windows 2000, and has been fixed in the Service > Pack 1 issued in July 2000. The bug does not affect NT4 or XP, or any > version of W2K SP1 or greater. It turns out that I had a "communication failure" with the developers in charge of correcting the said bug, which is not fixed in either W2K SP1 or SP2. I am also told that it will be fixed shortly. To reproduce the bug (for those who care) you have to use a Microsoft specific socket command, "TransmitFile()" and you have to set the "TF_DISCONNECT" parameter to request an automatic disconnect at the end of the file transmission. -- Christian Huitema
