|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical RE: Cogent service
I dont believe that number at all. Not to disagree with you at all Matt. But real world, it would depend on the design. If you are going router to router then it would be closer to accurate. I have seen 1-2ms added per router under load. That also might factor in a hop inside the room between 1 routers or another gear and a router. Coming in one card, having to do a lookup, going out another card to another box then out the layer 1 circuit to the next city. A VPN might not save this time though. But hubbing to a regional center, and then placing this traffic on an express circuit to the next regional city might save some of these ms. In other words LA to San Fran, an express fiber route to Chi, then out a peering connection. This would save 5-8ms compared to LA, San Fran, Portland, Salt Lake, Chi where at each hope 1-2 routers would insert themselves into the process. In my book, 5-8ms is not a real factor.... Dont get me started on speed of light on fiber... At 18:21 +0100 9/20/02, Matt Ryan wrote: The routers these days make a forwarding decision in ~20 ns - its going toThe hop count question is interesting. Is the consensus that it's mostly a customer service issue, where latency isnt affected but customer perception is? Or is it a real latency issue as more routers take a few CPU cycles to make a routing decision. -- David Diaz [email protected] [Email] [email protected] [Pager] Smotons (Smart Photons) trump dumb photons
|