--- "Martin P. Hellwig" <[EMAIL PROTECTED]> wrote:
> <cut> > > What do you think the > > switch is going to do with the traffic? Its > going > > to dump it. > > The only argument you gave is false, read the > full specs of any modern > switch (ie all 1Gb switches) > > -- > mph If I relied on "specs" for my info I'd be in the same boat you guys are in, so I don't. Specs are a nice "upper limit" but you can hardly come to any conclusions based on specs alone. Why don't you post a snippet from one of your "specs" to illustrate how long you can flow control a switch before it starts dumping packets. And remember that a spec is the max a box can do, so thats with only 2 ports and large packets. So then you can interpolate out (assuming you want to use math to solve your problems) to much smaller packets and many more ports contending for bus bandwidth. Like I said, its time to get out of college-mode and get yourself a test bed. Its the only way to learn how things really work, rather than how they're supposed to work. The truth is that switches under load don't like to be flow controlled, and they drop packets when their queues are at relatively low watermarks. Christ, some switches drop packets at 300K pps when they're not flow controlled. Besides, flow control isn't part of the argument. "Performance" isn't about how gracefully you can fail to perform a task; its about being able to perform the task without having to resort to using flow control. To me, a box that is issuing flow control is no better than one that drops packets. Both have failed to do the job required. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com