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.
They didn't really go into detail. Your theory sounds correct; the four ports on the SMC router default to 10.1.10.0/24 but will also handle a routable /29 address from the WAN side of another router plugged into it. Since Comcast now charges $19.95 instead of $9.95/month for a /29, I inquired about the cost of an IPv6 assignment; same price as I recall being told. I then asked if that was for a /60 or /56 and he said no, eight IPv6 addresses (/125?). I politely thanked him and ended the phone call. I realize that I could have gotten a more realistic answer from another Comcast rep with more v6-fu but I didn't pursue it. Andris > -----Original Message----- > From: NANOG [mailto:nanog-boun...@nanog.org] On Behalf Of Kalnozols, Andris > Sent: Sunday, June 22, 2014 9:29 PM > To: nanog@nanog.org > Subject: Re: Ars Technica on IPv4 exhaustion > > <snip> > > My experience as a Comcast Business customer with a /29 IPv4 subnet was > that swapping out the SMC modem/router for an IPV6-capable Motorola > DOCSIS 3 modem meant that I could no longer have the /29. > > Andris > > >
