North American Network Operators Group
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Re: Question about propagation and queuing delays

  • From: Eric A. Hall
  • Date: Mon Aug 22 11:36:26 2005 
On 8/22/2005 11:14 AM, David Hagel wrote:
> This is interesting. This may sound like a naive question. But if
> queuing delays are so insignificant in comparison to other fixed delay
> components then what does it say about the usefulness of all the
> extensive techniques for queue management and congestion control
> (including TCP congestion control, RED and so forth) in the context of
> today's backbone networks?

Latency is cumulative. Knocking a little time off Part A will still act to
shorten total time, regardless of the time occupied by Part B

Queuing behaviors are also significant when you are suffering congestion,
apart from the delay factors

-- 
Eric A. Hall                                        http://www.ehsco.com/
Internet Core Protocols          http://www.oreilly.com/catalog/coreprot/