Re: Ars Technica on IPv4 exhaustion

[Owen DeLong <owen () delong com>]

On Jun 22, 2014, at 20:41 , Laszlo Hanyecz <laszlo () heliacal net> wrote:

> On Jun 23, 2014, at 3:32 AM, "Kalnozols, Andris" <andris () 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