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

[Chris Kawchuk]

Not costly at all; when you think about scaling it to 20,000/30,000 subscribers per box.

BRAS's (xDSL, PPPoE, PPPoA) have massive numbers of hardware queues, and shape/queue per individual subscriber. These boxes are designed to do this.

Examples: Juniper E-series, Cisco ASR-Series, Juniper MX-series w/the "Q" cards, Redback SmartEdge 400/800, etc...

You still need "something in the central network" anyways to aggregate all these individual connections from every scubscriber. It's a natural to perform this function there; and not at the CPE. Usually it's the link between the DSLAM/CMTS/GPON to the Customer that's congested anyways - As Jerry mentioned, why transport it just to drop it? May as well rate-limit it upstream before it hits the narrow-bandwidth portion of the link to the customer.

- CK.

On 2012-06-20, at 3:19 AM, Chris Evans wrote:

>  performing bandwidth limits on a central network device
> would be too costly to do.