Routed optical networks

Tue May 2 16:45:05 UTC 2023

Hello Eve,

Thank you for weighing in; I'm eager for feedback from the field.
This eagerness stems from my work, over the past two years,
to form my understanding of where current- and next-gen metro area networks
are heading.
I need this understanding to help academics in my field of specialization
to better understand energy consumption in metro-area networks.

Your observation about elimination of OTN resonates well
with what I've heard from webinars, and what I've read in studies.
It also matches what I've shown in the graphic I linked to in an earlier
post in this thread (this graphic
<https://drive.google.com/open?id=1HkXAbd2PIQF_ACOeQYDtpeGxTEaTT1Y7&authuser=etienne.depasquale%40um.edu.mt&usp=drive_fs>
).
However, the larger operators are less inclined to drop OTN as a server
layer network
(layer network used as defined in G.805).

Indeed, part of the scope of the question leading to the results shown,
actually was to try to understand the prevalence of OTN in operators'
current networks.
As regards greenfield, the *NOG results are a bit more nuanced
<https://drive.google.com/file/d/1Hl-UKJNMTguGCH3_g9cTiSDBdQAK4lya/view?usp=sharing>
.
IP/MPLS over Ethernet over DWDM with ROADMs for node bypass gets 34% of the
vote,
up from about 13% of what is currently in their networks.

Cheers,

Etienne

On Tue, May 2, 2023 at 4:01 PM Eve Griliches <egriliches at gmail.com> wrote:

> Hi Etienne,
> Below is our (Cisco) definition of the Routed Optical Network. The goal,
> metro or long haul or subsea, is to reduce the number of control planes. By
> migration TDM traffic using CEM or PLE to the IP layer, you eliminate the
> OTN control plane and management. Eventually, when standards are settled
> the ultimate goal is to have a single control plane for the network. I'm
> not trying to be a commercial here, but you can read more in the resources
> section on this page:
> https://www.cisco.com/c/en/us/solutions/service-provider/routed-optical-networking/index.html
> HTH,
> Eve
>
> Routed optical networking, is an architecture that delivers improved
> operational efficiencies and simplicity. The solution works by merging IP
> and private line services onto a single layer where all the switching is
> done at Layer 3. Routers are connected with standardized 400G ZR/ZR+
> coherent pluggable optics.
>
> With a single service layer based upon IP, flexible management tools can
> leverage telemetry and model-driven programmability to streamline lifecycle
> operations. This simplified architecture integrates open data models and
> standard APIs, enabling a provider to focus on automation initiatives for a
> simpler topology.
>
> On Mon, May 1, 2023 at 2:30 PM Etienne-Victor Depasquale via NANOG <
> nanog at 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
>>
>

-- 
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
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