Subject: Re: ftp transfer speed anomaly
To: John F. Woods <>
From: Kevin M. Lahey <>
List: current-users
Date: 12/20/1998 13:55:53
In message <>"John F. Woods" writes
>(I *have*, however, seen a case where a bad card was corrupting packets that
>survived not only the IP header check but the UDP checksum as well!  (Yes,
>UDP checksums were enabled. ;-)  However, for each packet that snuck through,
>tens of thousands failed, as you might imagine.  But if it's a busy NFS

Ahh, our very own Jonathon Stone is a checksum gooroo, and has
documented all sorts of interesting problems that plague the
TCP/IP checksum algorithm:

        Craig Partridge, Jim Hughes, Jonathan Stone,
        "Performance of Checksums and CRCs over Real Data",
        Proc. SIGCOMM '95