On Tue, Sep 16, 1997 at 01:01:53PM -0700, Kent W. England wrote a treatise which identified the Rose Mary Woods of the Internet, or so he thought...:
You can't send a packet out an interface until the entire packet has been received on the incoming interface. Now if we assume 1500 byte packets (the new de facto MTU on all modern Internet backbones) and DS-3 pipes, then it takes about 250 microseconds to buffer the pkt on each hop. Since the US internet backbone from coast to coast is about 120 hops, there's your 30 milliseconds and Bob's your uncle.
Did I do the arithmetic right?
I think you did the math right... but isn't that what "cut-through" switching is all about? Sending the packet out before you're done getting it in? Cheers, -- jra -- Jay R. Ashworth jra@baylink.com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "People propose, science studies, technology Tampa Bay, Florida conforms." -- Dr. Don Norman +1 813 790 7592