Very helpful observations, Matt, thank you. How comfortably does the phrase "routed optical networks over Ethernet without ROADMs" sit with you? I mean: would you accept a limitation of "optical network" to the case of a network without optical layer switching (of the type done by add-drop multiplexers)?
Cheers, Etienne On Mon, May 1, 2023 at 10:57 PM Matt Erculiani <merculi...@gmail.com> wrote: > Hi Etienne > > In short, the idea is that optical networks are wasteful and routers do a > better job making more use of a network's capacity than ROADMs. Take the > extra router hop (or 3 or 8) versus short-cutting it with an optical > network because the silicon is so low-latency anyway that it hardly makes a > difference now. Putting more GBs per second on fewer strands means saving a > lot of money on infrastructure costs. > > 400G ZR comes to mind as a foundational technology since it basically made > active optical muxponder equipment obsolete in the metro. The savings here > means telcos/enterprises can afford more router ports, which we've already > established can utilize paths more efficiently anyway. Otherwise, this is > more of a concept and can be executed with a variety of pre-existing > technologies, or someone's new secret sauce that bakes everything together > like SD-WAN did to its constituent technologies. > > -Matt > > > On Mon, May 1, 2023 at 12:30 PM Etienne-Victor Depasquale via NANOG < > nanog@nanog.org> wrote: > >> Hello folks, >> >> Simple question: does "routed optical networks" have a clear meaning in >> the metro area context, or not? >> >> Put differently: does it call to mind a well-defined stack of >> technologies in the control and data planes of metro-area networks? >> >> I'm asking because I'm having some thoughts about the clarity of this >> term, in the process of carrying out a qualitative survey of the results of >> the metro-area networks survey. >> >> Cheers, >> >> Etienne >> >> -- >> Ing. Etienne-Victor Depasquale >> Assistant Lecturer >> Department of Communications & Computer Engineering >> Faculty of Information & Communication Technology >> University of Malta >> Web. https://www.um.edu.mt/profile/etiennedepasquale >> > > > -- > Matt Erculiani > ERCUL-ARIN > -- Ing. Etienne-Victor Depasquale Assistant Lecturer Department of Communications & Computer Engineering Faculty of Information & Communication Technology University of Malta Web. https://www.um.edu.mt/profile/etiennedepasquale