Re: Comcast IPv6 Trials

[Chris Gotstein <chris () uplogon com>]

Typically the CPE address is private, not sure why they would use a
public IP.  The MTA (VoIP) part of the modem would need a public IP if
it was talking to a SIP server that was not on the same network.  Most
smaller cable system outsource their VoIP to a reseller with a softswitch.

---- ---- ---- ----
Chris Gotstein, Sr Network Engineer, UP Logon/Computer Connection UP
http://uplogon.com | +1 906 774 4847 | chris () uplogon com

On 1/28/2010 7:44 AM, Joakim Aronius wrote:
> * Paul Stewart (pstewart () nexicomgroup net) wrote:
> > That really makes sense - on an incredibly smaller scale (and I mean MUCH smaller scale), we operate cable modem in 
> > two small communities - currently we use 3 IP addresses per subscriber.  One for the cable modem itself, one for the 
> > subscriber (or more depending on their package), and one for voice delivery (packetcable).  If we moved even two of 
> > three IP assignments to native V6 we'd reclaim a lot of V4 space - I can only imagine someone their size and what 
> > this means...
> >
> > Paul
>
> Excuse the newbie question: Why use public IP space for local CPE management and VoIP? Doesn't DOCSIS support traffic 
> separation?
>
> /J