IP and Optical domains?

[mohta at necom830.hpcl.titech.ac.jp (Masataka Ohta)]

Mark Tinka wrote:

> Layer 2 transport is required in any scenario.

Yes, of course, as I wrote:

 > all the thing to be done at L2 is to watch BER/FER
 > above some threshold.

I don't deny L2 exist, though, if L3 protocols were properly
designed, L2 protection is not required.

 > Dark fibre, for example,
> would not have any optical kit on it, and can be fired through
 > router-to-router optics.

That's L1, which is also required to exist.

> We primarily over-provision to support growth. Resiliency comes as
> secondary benefit.
>
> If you are deploying additional bandwidth just for protection, I hope
> you're my competitor.

So, you deny the original point of "The result of this is that the
networks are heavily underutilized". OK.

							Masataka Ohta