On Jun 22, 2014, at 20:41 , Laszlo Hanyecz <las...@heliacal.net> wrote:

> 
> On Jun 23, 2014, at 3:32 AM, "Kalnozols, Andris" <and...@hpl.hp.com> wrote:
> 
>> 
>> On 6/22/2014 7:41 PM, Frank Bulk wrote:
>>> Did they ever explain why?  Did the SMC function as a router, and act as the
>>> customer side of a stub network that allowed that /29 to hang off the
>>> router?  If that was the case, and the Motorola D3 modem was L2-only, that
>>> might explain the change in capability. 
>> 
> 
> The Comcast business SMC gateway speaks RIP to make the routed /29 work.. in 
> theory it could be put into bridge mode and you can do the RIP yourself but 
> they don't support that configuration (you'd need the key to configure it 
> successfully and they didn't want to do when I asked).  If you poke around in 
> the web UI, it does support IPv6 in some form, but it doesn't seem to be 
> active for me.
> 
> If you don't have a static IP block from them and thus don't have the need to 
> use RIP you can just use a regular DOCSIS 3 cable modem and get IPv6, but you 
> only get one IPv4 number that way.

In my experience, if you put a switch behind the modem (not a router), you can 
get as many IPv4 numbers as you have devices attached to the switch on Business 
Class. On residential, you're limited to one, but I have gotten multiples on 
business class.

Owen

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