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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Diffserv service classes
No doubt what you say is true, however, the typical eVLBI site is not part of the Internet2 (and also doesn't need the TCP aspects of the Scavenger service). There are certainly applications and users out there that would like to use all of the bandwidth possible, but do not need to step on other, more bit sensitive, services. Regards Marshall On Sun, 21 Nov 2004 10:04:53 -0800 (PST) Joe St Sauver <[email protected]> wrote: > > Hi, > > Less-than-best effort traffic as implemented via the Internet2 Scavenger > Service (see: http://qbone.internet2.edu/qbss/ ) never really took off; > for example, see http://netflow.internet2.edu/weekly/20041108/#dscp > which notes that Scavenger Service (DSCP=8) tagged traffic makes up less > than 1% of all octets and less than 1% of all packets. > > One can argue chicken-and-egg (e.g., had it been supported on the commodity > Internet, it would have been more successful), but I think the bottom line > reality was that because > > -- Internet2 was/is uncongested, and because > -- the typical university user of I2 pays $0/Mbps used anyhow, > > the motivation for users to tag traffic as Scavenger was typically > non-existent (offering a "discount" from a price of zero is hard unless > the model would involve PAYING people who generate less-than-best-effort > traffic, a model which strikes me as, well, somewhat > unsustainable/politically difficult). > > A network administrator at a site might unilaterally tag all traffic of a > particular type as less-than-best-effort, but again, unless there is > congestion, that tagging would be to no effect. > > Regards, > > Joe St Sauver ([email protected]) > University of Oregon Computing Center
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