[Sdnp] Proposed SDN BOF charter

[Anton Ivanov]

On 20/09/11 12:38, Robert Raszuk wrote:
>
>>> Essentially what I would like to happen is that application is talking
>>> with first router/switch hop of the network (or bunch of them to see
>>> who is cheaper), presents it's requirements and then rest is
>>> transparent to the application ..
>>
>> Bad idea. Designwise. This implies that the first router knows full
>> state of the network including what happens in other administrative
>> domains or is capable of loading that and talking sensibly back to the
>> application.
>
> Absolutely not.
>
> First router talks to Alto/PCE to determine the possible best path for 
> given set of requirements. It talks in full transparency to the 
> applications.

So, router talks to what is essentially a controller to get things done.

1. You just introduced an extra hop.
2. Your latency is not going to be any better than if the controller was 
co-hosted with ALTO/PCE  and app talked to it. Probably worse.
3. It will scale worse because you have to pull authentication forward 
to the router.
4...

>
> If you look at current network's first hop router (headend) already 
> talks to PCE just to check what paths intra-area or inter-domain will 
> meet set requirements before it attempts to signal a TE LSP.

Apologies, but unless I am mistaken, signalling a TE LSP is not done 
based on an application request, does not require authentication, 
authorization and accounting and you are not going to bill for it on 
on/off basis, right? Or I am missing something?

>
> I think this WG would be most useful to determine the language 
> application or host talks to the network as today there is very little 
> done in this area.

Exactly.

> The closest is abandoned RSVP Intserv due to the state overload of 
> micro-flow reservations.

Not necessarily. The closest from the perspective of a developer which 
you pull off the street today will be something from the realm of Amazon 
web services. If you tell him to program RSVP he will give you a dull 
look and go somewhere else.

>
> Best,
> R.
>
>
>


-- 
     Humans are allergic to change. They love to say, "We've always
done it this way." I try to fight that. That's why I have a clock
on my wall that runs counter-clockwise.   -- R.A. Grace Hopper

A. R. Ivanov
E-mail:  anton.ivanov at kot-begemot.co.uk