> > I’ve seen proposals for an LSR MPLS/ROADAM type solution, where imagine > you are at a hop where in a long distance system solution, you would end up > with OEO, but instead you get directionality capability with an IP/MPLS > capable device. As mentioned previously, the 400-ZR/ZR+/ZR-Bright/+0 > optics are the latest example of that. >
Jared, I understand your point in the above statement to be that directionality is cost-effectively implemented through label-switched paths, rather than (ROADM-enabled) optical path switching. Do I understand right? Thank you. Etienne On Tue, May 2, 2023 at 9:33 PM Jared Mauch <ja...@puck.nether.net> wrote: > > > > On May 2, 2023, at 2:29 PM, Etienne-Victor Depasquale via NANOG < > nanog@nanog.org> wrote: > > > > On Mon, May 01, 2023 at 02:56:47PM -0600, Matt Erculiani wrote: > > > 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. > > > > This is a very convoluted way of backing into the ole packet-switched > > vs. circuit switched decision. > > > > I don't follow. > > While ROADMs can be thought of as circuit-switchers, > > the number of concurrent clients and switching latency put ROADMs on a > different operational level than packet switchers, right? > > > I’ve seen proposals for an LSR MPLS/ROADAM type solution, where imagine > you are at a hop where in a long distance system solution, you would end up > with OEO, but instead you get directionality capability with an IP/MPLS > capable device. As mentioned previously, the 400-ZR/ZR+/ZR-Bright/+0 > optics are the latest example of that. > > I know of a few companies that have looked at solutions like this, and can > expect there to be some interesting solutions that would appear as a > result. Optical line systems tend to have pretty low power requirements > compared to a router, but some of the routers are getting pretty low power > as well when it comes to the power OPEX/bit, and if you have the ability to > deliver services as an integrated packet optical you could see reduced > costs and simplified components/sparing. > > I’ll also say that I’ve not yet seen the price compression that I had > expected in the space yet, but I figure that’s coming. We are seeing the > bits/watt ratio improve though, so for the same or less power consumption > you get more bits. Some of this technology stuff is truly magical. > > - Jared -- 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