[c-nsp] DOCSIS 3.0 & PPPoE/L2TP compatibility

[iptech]

Hi,

No takers?

Would really appreciate some feedback/pointers.

Thank you.

On 7/27/2012 2:57 PM, iptech wrote:
> Hi,
>
> We are a small ISP and have a setup in place with the local cable 
> company for terminating their users via L2TP for Internet access. 
> However they have just announced to us that they are moving to a 
> DOCSIS 3.0 compliant setup, and this standard no longer supports PPPoE 
> via L2TP, and can now only offer PPTP for terminating with us.
>
> We have already begun replacing our Cisco 7206VXR LNS devices with 
> Cisco ASR 1Ks and as you will be aware the older 7206 can do both L2TP 
> and PPTP, whereas the ASR1k can do only L2TP.
>
> I do not have any experience in the cable arena, but from what I have 
> read in the DOCSIS standards, each version has maintained backwards 
> compatibility, therefore I am very surprised our CableCo has claimed 
> they cannot do PPPoE/L2TP anymore.
>
> The CMTS they are currently using is a Cisco, and now they are moving 
> to a new ARRIS CMTS. I have not been able to find any information on 
> this device and what it can do or not.
>
> With the ASR1K marked as the natural upgrade path for LNS functions,  
> therefore I cannot believe that it is not fully compatible with DOCSIS 
> 3.0.
>
> From what I can tell the only way to accommodate the new CMTS PPTP 
> connections will be to terminate them on the legacy 7206VXR, which at 
> the end of the day is a backwards step.
>
> I would greatly appreciate if anyone can give me any pointers and/or 
> suggestions on this matter, so I can understand it and move it forward.
>
> FYI: The driver for the CMTS upgrades is to offer higher bandwidth 
> access speeds 15mb-20mb.
>
> Thank you.
>
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