From: Trond Myklebust Subject: Re: NFS over TCP Date: 28 May 2003 14:33:05 +0200 Sender: nfs-admin@lists.sourceforge.net Message-ID: References: <20030527234058.81598.qmail@web21003.mail.yahoo.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: nfs@lists.sourceforge.net Return-path: Received: from pat.uio.no ([129.240.130.16]) by sc8-sf-list1.sourceforge.net with esmtp (Exim 3.31-VA-mm2 #1 (Debian)) id 19L0D2-00059o-00 for ; Wed, 28 May 2003 05:39:12 -0700 To: David Myer In-Reply-To: <20030527234058.81598.qmail@web21003.mail.yahoo.com> Errors-To: nfs-admin@lists.sourceforge.net List-Help: List-Post: List-Subscribe: , List-Id: Discussion of NFS under Linux development, interoperability, and testing. List-Unsubscribe: , List-Archive: >>>>> " " == David Myer writes: > 1) Doing a few mount operations, I noticed that > sometimes it uses V3 GETATTR call and sometimes it uses V2 > GETATTR call, how does client ( or server ) decide witch > version to use ? Strange enough, in case it did use V3 GETATTR, > the prior GETPORT is V2.. does this make a difference later on > ? The kernel will switch to NFSv2 if v3 is not available. To determine whether or not v3 is available, the server's portmapper is consulted. > 2) In reply to the V2 GETATTR call, server reply to > the client socket (port 800) with ACK, then send another packet > ( with PSH/ACK flags on ) with requested data to port 799,this > causes RST from the client. Anyone seen this behavior of > decrementing dest port ( client port number ) by one ? Huh? TCP is a connection oriented protocol. The server does not get to choose which port to send a reply to. Are you sure you are not confusing MOUNT and NFS requests here? Cheers, Trond ------------------------------------------------------- This SF.net email is sponsored by: ObjectStore. If flattening out C++ or Java code to make your application fit in a relational database is painful, don't do it! Check out ObjectStore. Now part of Progress Software. http://www.objectstore.net/sourceforge _______________________________________________ NFS maillist - NFS@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nfs