RE: [PCN] Architecture draft

Lars, I believe the guess is that there'll be many ingress-egress pairs
with none or very few flows at a particular moment. Not a random
distribution of calls onto all possible pairs. Basically there are many
calls between London & Manchester and very few between truro and
Shetland. I & Ben will try and extract some numbers from the [bt]
predicted future traffic matrix.

-----Original Message-----
From: Lars Eggert [mailto:lars.eggert@nokia.com] 
Sent: 25 October 2007 10:54
To: ext Jozef Babiarz
Cc: pcn@ietf.org; Geib, Ruediger
Subject: Re: [PCN] Architecture draft - probing section & general
updates.

On 2007-10-24, at 19:14, ext Jozef Babiarz wrote:
> I'm thinking of a scenario that many enterprises face today. Large  
> multi
> location enterprises use multiple WAN links or VPS to interconnect  
> their
> locations. PCN is run inside the enterprise network including WAN  
> links
> which maybe tunneled across the carrier network. Network Access  
> Control
> with PCN admission control is done at the enterprise access edge  
> nodes.
> New flows can be routed to any egress access edge node and some flows
> will (between different locations) be routed over one of the WAN links
> which are normally bandwidth constrained.

I understand your scenario so far.

> There is a high probability
> that many access nodes will only have one flow between each other as
> there are a large number of them.

I don't see how this follows, however. It seems that if the sites  
that are being interconnected aren't tiny, there should very likely  
be multiple flows per ingress/egress pair, no?

Lars

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RE: [PCN] Architecture draft - probing section & general updates.