[e2e] Re: crippled Internet

Allison Mankin mankin at ISI.EDU
Wed Apr 25 21:14:34 PDT 2001

About the datasets on delays:

Fred Baker wrote:

> But they appear to suggest that some packets experienced 500 ms 
> of delay 

Christian Huitema wrote:

> What I see in the graphs is that the max delay is sometime very long,
> which raises quite a few questions. How do we explain a delay of more
> than one second between two I2 connected universities? Is some gigabit
> router somewhere allowing its queues to reach 100 megabytes? Or is some
> kind of a bug? And, if this is a bug, is the bug in the measurement
> system, or in some routing component? 
> Assuming that this is a queuing delay, then we cannot deduce from the
> small average and std that an I2 like network is fit for VoIP.

Does anyone have an analysis of how many of the outlier delay
values may be due to routing convergence problems (or other
routing-related hits)?  This would be a different context for
thinking about the future of voip.


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