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Re: [PCN] Concensus questions from Thursday's PCN meeting

Steven Blake <steven.blake@ericsson.com> Tue, 18 March 2008 14:21 UTC

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From: Steven Blake <steven.blake@ericsson.com>
To: "Geib, Ruediger" <Ruediger.Geib@t-systems.com>
In-Reply-To: <1B6169C658325341A3B8066E23919E1CF64645@S4DE8PSAANK.mitte.t-com.de>
References: <BABC859E6D0B9A4D8448CC7F41CD2B0706181835@xmb-rtp-203.amer.cisco.com> <RrmbUrJK.1205679770.1867150.karagian@ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF641B0@S4DE8PSAANK.mitte.t-com.de> <000001c88809$b2e73840$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF6423C@S4DE8PSAANK.mitte.t-com.de> <001301c88816$114dab60$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF644B1@S4DE8PSAANK.mitte.t-com.de> <000001c88835$998bcf60$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF6451A@S4DE8PSAANK.mitte.t-com.de> <000601c8883b$e3828950$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF64580@S4DE8PSAANK.mitte.t-com.de> <000901c88844$f35c1130$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF645A3@S4DE8PSAANK.mitte.t-com.de> <000a01c8884d$081c9790$810c5982@dynamic.ewi.utwente.nl> <1B6169C658325341A3B8066E23919E1CF64645@S4DE8PSAANK.mitte.t-com.de>
Organization: Ericsson IP Infrastructure
Date: Tue, 18 Mar 2008 10:18:39 -0400
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Subject: Re: [PCN] Concensus questions from Thursday's PCN meeting
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On Tue, 2008-03-18 at 08:29 +0100, Geib, Ruediger wrote:

> Hi Georgios,
> 
> in the situation you describe, packet losses occur. This will result 
> in bad press, as the customers using PCN based services were promised 
> another type of service.
> 
> In this situation it doesn't matter whether or not ECMP is deployed 
> and it also doesn't matter whether termination is fair or not. The 
> important event is: packet losses occur (in one of your examples 
> several routers drop packets). The drops are the only relevant issue. 
> Whether service resumes after 5 seconds due to extremly well 
> engineered termination or after 10 seconds after a sufficient number 
> of customers hang up is not important. 
> I can't recall having read anytime in the news 
> "Major network outage - but termination was fair." I can 
> only recall having seen the first part.
> 
> I'm sure you're happy in adapting your example, as you do all the 
> time. I'm having work to do, but maybe someone else is interested 
> in continuing discusion. I think, I've made my point.

Ruediger,

If I follow this comment to its logical conclusion, then PCN is
superfluous in this network.  Is that what you are trying to say?


Regards,

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Steven Blake                <steven.blake@ericsson.com>
Ericsson/Redback Networks               +1 919-472-9913

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