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Old 13-03-2009, 21:16   #285
Ignitionnet
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Join Date: Jun 2008
Location: Leeds, West Yorkshire
Age: 47
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Re: Legal action taken against Virgin Media throttling practices

Quote:
Originally Posted by BenMcr View Post
So I always assumed that this is all they did - you hit X threshold they send Y config profile which sets your modem to Z speed. After the time period is up they then send the config profile that matches your original tier.

I'm pretty sure people have posted on here that that is the case - because you can see it in the modem pages
You can't see any changes at the modem. It's policed at the CMTS through rate limiting, nothing is changed at the modem at all just the QoS profile at the CMTS. Modems will only take new config files when they are registering, hence the stuff about rebooting to get an uplift / new service tier.

Nothing is sent to the modem it's all network side.

There is nothing 'slowed down' - the traffic follows a simple leaky bucket, traffic in excess of the profiled rate will be dropped in the same manner as normal. It's nothing more or less than a switch from 20/0.768 say to 5/0.192 so no more interception than the standard rate limiting which is at layers 1 to 3, nothing transport to application layer.
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