Rather a broad title i know. I am primarily an IP person and now need to get up to speed on some of the optical technologies.
I have done some reading around SONET, DWDM, Metro ethernet etc. but i am still struggling to understand a few basics i think.
I appreciate that Sonet/SDH can run over DWDM but i believe you can also run ethernet natively over DWDM.
If you were building a new optical network from scratch would you consider utilising SONET/SDH and if so what would be the reasoning behind it.
I guess where my confusion comes from is there is Ethernet over Sonet, Packet over Sonet etc. but are these technologies there simply because there is such a large installed base of Sonet/SDH or is there another reason eg. Sonet/SDH provide far more reliability for packet transfer with the ability to guarantee delays etc.
Any insights would be much appreciated