[j-nsp] cable modem/dsl/ftth bandwidth limiting

[Jerry Jones]

Yes some do their limiting at the DSLAM or OLT.

However, why transport traffic just to drop it? I generally use an MX as a BRAS and shape there.


On Jun 19, 2012, at 12:19 PM, Chris Evans wrote:

Question for you service provider folks.  How do cable modems, dsl, ftth,
etc limit bandwidth? I believe that everything is limited at the customer
edge demarq device, performing bandwidth limits on a central network device
would be too costly to do.

Do the CE devices use a form of traffic shaping, policing or some other
algorithm?? I believe it's just traffic shaping as I've looked at packet
captures and never see too many retrans taking place.

Thanks for any info you can provide!
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