North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: PC Bozo's World bites again (CNN, too)
Does RFC-879 still have any validity? " HOSTS MUST NOT SEND DATAGRAMS LARGER THAN 576 OCTETS UNLESS THEY HAVE SPECIFIC KNOWLEDGE THAT THE DESTINATION HOST IS PREPARED TO ACCEPT LARGER DATAGRAMS. This is a long established rule. To resolve the ambiguity in the TCP Maximum Segment Size option definition the following rule is established: THE TCP MAXIMUM SEGMENT SIZE IS THE IP MAXIMUM DATAGRAM SIZE MINUS FORTY. The default IP Maximum Datagram Size is 576. The default TCP Maximum Segment Size is 536. " >Michael Dillon <[email protected]> writes: > >> I don't think so. They even said in their article that the technical >> details are based upon this URL >> http://www.sns-access.com/%7Enetpro/maxmtu.htm >> and this guy says stuff like: >> >> And, it turns out, depending on how your ISP and other routers >> encountered on the Internet handle your TCP/IP requests, that a MaxMTU >> setting of 576, often referred to as the "Internet Standard", will in >> many cases avoid the fragmentation of packets of data and the slow >> transfer speeds which result. > >He used to be one of my users, at two different ISPs, in fact. I >had a long drawn out disagreement about how this was wrong, and >mathematically didn't make any sense. > >However, lots of people have confirmed that it really does >help... which leads me to accept Karl's explanation. > >We shouldn't expect anymore from microsoft, really. > >Darrell
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