 funchordsHelloPremium,MVM
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1 edit | reply to TFergason
Re: Why just Comcast? Other MSO's are doing it too... said by TFergason :
Why is Comcast in the spotlite? Every MSO I have ever worked for has Sandvines in place. How each chooses to shape or filter the traffic differs... but it's out there.
I do not work for Comcast, but I have/do work for other MSO's that employ Sandvine technology to limit and filter traffic. I think some points go into Sandvine's column for coming up with a solution that has generally remained transparent to the user for as long as it has.
said by TFergason :
Also... the "article" if you can call it that... Gee, thanks! 
said by TFergason :
states the Sandvine is somehow connected to the CMTS ??? This fact surprised me, too. Statements from Comcast employees initially alerted me to it, and later my testing showed it to be true.
said by TFergason :
Never seen that configuration. It's usually on 2 GigE ports on an HSD router... and routes are in place routing traffic from specific Vlans or scopes out one GigE interface to the Sandvine... then back into the router from the Sandvine and out the MSO's circuits. I've never worked for your industry, but everything I've read about how it is recommended to be deployed agrees with you. Comcast's implementation is different, however.
Part of the explanation, possibly, is that Comcast.net alone, is a very vast network -- and one that has been consuming other networks at a regular rate. Comcast's internal congestion problems and topology realities may vastly overshadow those of most of Sandvine's customers. The conventional wisdom may be different.
But one of the reasons that Comcast is getting a lot of attention is that their implementation seems broken -- and we can't get it fixed because they entirely deny it exists!!
said by TFergason :
At any rate... don't hammer Comcast for trying to keep the situation under control. At the rate which people are starting to P2P more and more... they would have to add so many new circuits to the backbone to support the added bandwidth that the customer could no longer afford the charges they would impose to cover the cost of said circuits.
I hope you really did read my articles. I've tried to see it evenhandedly, and I've strived to both be factual and to differentiate between objective fact and subjective opinion.
It's been suggested by more than one person intimately familiar with the technology that it sounds like Comcast's implementation is both inconsistent and broken. I have no way to prove that -- all I can do is report what happens when I try to do something and it doesn't work out as expected.
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Robb Topolski -= funchords.com =- Hillsboro, Oregon USA
Are you affected by Comcast's RST forging? How to test it! -or- Read my original report. |
