[LINK] There goes the neighbourhood...

[Kim Holburn]

On 2011/May/11, at 11:12 PM, Karl Auer wrote:

> On Wed, 2011-05-11 at 22:47 +1000, Kim Holburn wrote:
>> Nice point although what networks can really do and can guarantee that
>> sort of shaping end to end?  
> 
> Many, especially within an enterprise or between cooperating
> enterprises, or where the carrier offers VC circuits as a product.

So it'd all work perfectly on a large well-managed corporate network where everyone used the same brand of videoconferencing unit or SIP phones.  A truly great standard.

>> Well yes.  I expect these protocols were designed when machines
>> weren't fast enough to multiplex this stuff real time.
> 
> You've missed the point. If the streams need to go to different places,
> or need different QoS parameters, or for any other reason need to be
> independent of each other, then separate connections are needed.

But between your cooperating corporate networks all that carefully crafted QoS gets lost.  QoS really only works if it's end-to-end.
 
> Multiplexing multiple streams into one TCP connection is a Bad Idea,
> quite apart from the processing complexity that it introduces.
> 
>>  Skype is proof that they are easily fast enough these days even
>> using an inappropriate protocol.
> 
> Processor speed has little to do with it.
> 
> Regards, K.
> 
> -- 
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> Karl Auer (kauer at biplane.com.au)                   +61-2-64957160 (h)
> http://www.biplane.com.au/kauer/                   +61-428-957160 (mob)
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-- 
Kim Holburn
IT Network & Security Consultant
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