symmetric vs. asymmetric [was: Verizon Policy Statement on Net Neutrality]

James R Cutler james.cutler at
Sat Mar 7 14:50:48 UTC 2015


Are your measurements taken at the campus boundary or within the campus network?

I remember the confusion when Centrex was first introduced at UMich. The statistic there that confounded was call durations wildly exceeding models, but mostly within the campus, not to the outside world.  Could there be peer to peer traffic that you do not see?

James R. Cutler
James.cutler at
PGP keys at

> On Mar 6, 2015, at 11:35 PM, Frank Bulk <frnkblk at> wrote:
> The download/upload in our residential/business eyeball network has been
> trending a 95th-percentile based ratio of 9:1.  If I look at a higher-ed
> customer of ours who has symmetric service and has a young demographic the
> average ratio is 11:1 and the peak ratio 8.8:1.  So despite access to
> symmetric speeds, they're not showing a distinctively heavier symmetricity.
> Frank

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