deLaat_OpticalNtwking_09_26_02.ppt-StarTap.pptVIP

Why is optical networking interesting? Why is optical networking interesting? EU SURFnet University of Amsterdam SARA NIKHEF serena What is this buzz about optical networking Networks are already optical for ages Users won’t see the light Almost all current projects are about SONET circuits and Ethernet (old wine in new bags?) Are we going back to the telecom world, do NRN’s want to become telco’s Does it scale Is it all about speed or is it integrated services Current technology + (re)definition Current (to me) available technology consists of SONET/SDH switches Changing very soon! DWDM+switching coming up Starlight uses for the time being VLAN’s on Ethernet switches to connect [exactly] two ports So redefine a l as: “a l is a pipe where you can inspect packets as they enter and when they exit, but principally not when in transit. In transit one only deals with the parameters of the pipe: number, color, bandwidth” VLBI Know the user What the user So what are the facts Costs of fat pipes (fibers) are one/third of equipment to light them up Is what Lambda salesmen tell me Costs of optical equipment 10% of switching 10 % of full routing equipment for same throughput 100 Byte packet @ 10 Gb/s - 80 ns to look up in 100 Mbyte routing table (light speed from me to you on the back row!) Big sciences need fat pipes Bottom line: create a hybrid architecture which serves all users in one consistent cost effective way Scale 2-20-200 Services lambda for high bandwidth applications Bypass of production network Middleware may request (optical) pipe RATIONALE: Lower the cost of transport per packet CA*net 4 Architecture Architectures - L1 - L3 Distributed L2 Transport in the corners Layer - 2 requirements from 3/4 Research needed Optical devices Internet Architecture Network Elements as Grid Resources Transport protocols get in other corners How dynamic must your optical underware be Don’t mix trucks and Ferrari’s Revisiting the truck of tapes The END Thanks to TERENA: David Willi