Xref: utzoo comp.protocols.tcp-ip:15236 comp.protocols.tcp-ip.ibmpc:5148 comp.dcom.lans:7455 Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!swrinde!cs.utexas.edu!chinacat!uudell!Kepler.dell.com!mjhammel From: mjhammel@Kepler.dell.com (Michael J. Hammel) Newsgroups: comp.protocols.tcp-ip,comp.protocols.tcp-ip.ibmpc,comp.dcom.lans Subject: V3.2 vs V4 UDP and NFS Message-ID: <16241@uudell.dell.com> Date: 12 Mar 91 00:57:55 GMT Sender: news@uudell.dell.com Reply-To: mjhammel@Kepler.dell.com (Michael J. Hammel) Followup-To: comp.protocols.tcp-ip Organization: Dell Computer Corp. Lines: 33 I seem to be having a problem with V4 systems and UDP. It appears that an NFS-based test between two V3.2 systems that I run shows up under Netwatch as follows: IP: src addr -> dest addr UDP -> where value: is some number apparently less than 1000 (but I can't prove that) value2: is either 2049, 1043, or 1045 (there may be others, Netwatched was stopped for some reason when I wrote this up) value3: appears to be of the same group of numbers as value2 but never value4: was either 104, 1152, or 124. Those were the only values I saw. With V4 to V4 systems its more like: IP: src addr -> dest addr 1500 UDP Fragment And its *always like that. I don't have data on what happens between V4 and V3.2 systems. Question: what do these numbers mean, what does Netwatch mean by Fragment (and how does he know its a fragment?), and why does either Netwatch see things differently between the two scenarios or why is there a difference? Can it be related to the rsize/wsize default values? Where are these values specified? I'm not specifying these values in the mount command. Comments? Suggestions? Michael J. Hammel | mjhammel@{Kepler|socrates}.dell.com Dell Computer Corp. | {73377.3467|76424.3024}@compuserve.com #include | zzham@ttuvm1.bitnet | uunet!uudell!feynman!mjhammel #define CUTESAYING "Recycle. Just do it."