[Teas] Re: [Green] Power Aware Traffic Engineering

[Robert Raszuk <[e-mail]>]

Hi Tony,

> How are you correlating between 900 edge nodes on which link (or links)
> from among the 250  in the core they need to dry out traffic in a
> bidirectional fashion in a fully distributed manner ?
>
>
> Each node can see the power consumption of each link.  Each node can see
> the traffic reservations on each link.  Each node is motivated to
> consolidate traffic on links that consume less power or are not power save
> capable.
>

Ok I see what you are envisioning ...

But to do that in a symmetric bidirectional fashion, and to do it well
among 900 edges - likely from different vendors - it is going to be very
very hard.

And if one edge does not play this game some of his traffic will likely be
dropped when you flip the switch on the link.  Instead, nicely
applying make-before-break fashion.

- - -

What I am actually very curious about in this entire "GREEN" business is
that operators pay for the long haul links (lambda or channels or virtual)
flat rates per month. So if you switch optics on them it only sort of saves
some Watts for the operator, but not transport company and does not result
in any link cost saving.

So it is like an operator buying an expensive bus and then trying to drive
on two wheels during the night to save tireware on the other two
irrespective of passenger comfort of those inside :)

Cheers,
Robert