Re: OT - End-to-End QoS Network Design - Second Eddiont RANT

bBuffering does reduce jitter. It also increases latency, but has the
benefit of smoothing out variable latency. It's a trade-off. In the VoIP
world, that's why you have a dejitter buffer. It smooths out small
variations in delay, but adds overall delay. The trick is finding the
balance that solves your problem but doesn't make people feel like they're
on a satellite link. b

On Fri, Jun 6, 2014 at 1:59 PM, Dave Serra <maybeedave_at_yahoo.com> wrote:

> B
> I just cracked open the b End-to-End QoS Network Designb
> Second Edition
> book expecting to really hone in my understanding of QoS and
> right on the
> first page the author makes the following statement b streaming
> video
> (unbidirectional flows that benefited from both network and application
> level
> buffering to offset variations in transmission delays)b B We know
> b variations in transmission delaysb
> to be jitter.B Why is this CCIE
> telling
> me that network buffering reduces jitter when we know it is going to
> INCREASE
> jitter.B Ib m sure some willB rationalize
> corner cases where jitter
> can be improved by network buffering but in the
> statistical random switching
> world where flows come into and out of existence
> the variance will
> certainlyB be high.
> So now Ib m left wondering if I should just put this book
> down and consider its cost a donation to ciscopress?B Its only the first
> page
> and I am very
> unimpressed.B
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Received on Sat Jun 07 2014 - 08:54:43 ART