Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.12.5/8.12.5) with ESMTP id g6J6vtRw015933 for ; Thu, 18 Jul 2002 23:57:55 -0700 Received: (from majordomo@localhost) by oss.sgi.com (8.12.5/8.12.3/Submit) id g6J6vtB6015932 for netdev-outgoing; Thu, 18 Jul 2002 23:57:55 -0700 X-Authentication-Warning: oss.sgi.com: majordomo set sender to owner-netdev@oss.sgi.com using -f Received: from iisc.ernet.in (www-cache.iisc.ernet.in [144.16.64.3] (may be forged)) by oss.sgi.com (8.12.5/8.12.5) with SMTP id g6J6vmRw015923 for ; Thu, 18 Jul 2002 23:57:50 -0700 Received: from eis.iisc.ernet.in (eis.iisc.ernet.in [144.16.64.5]) by iisc.ernet.in (8.9.2/8.9.0) with SMTP id MAA80976 for ; Fri, 19 Jul 2002 12:26:32 +0530 (IST) Received: by eis.iisc.ernet.in (SMI-8.6/SMI-4.1) id MAA21653; Fri, 19 Jul 2002 12:28:23 +0530 From: anand@eis.iisc.ernet.in (SVR Anand) Message-Id: <200207190658.MAA21653@eis.iisc.ernet.in> Subject: TCP advertized window To: netdev@oss.sgi.com Date: Fri, 19 Jul 2002 12:28:23 +0530 (GMT+05:30) X-Mailer: ELM [version 2.5 PL2] MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Spam-Status: No, hits=1.3 required=5.0 tests=MAY_BE_FORGED version=2.20 X-Spam-Level: * Sender: owner-netdev@oss.sgi.com Precedence: bulk Hi, When I did tcpdump I observed that the tcp advertised window is not fixed to maximum value of 32K or 64K for the entire duration of the connection, but is evolving from some starting value at the start of the connection. The maximum value to which it grows is again not constant for connections to different hosts. Can you let me know what is the mechanism used in computing the advertised window ? Anand