On Sun, Dec 20, 2015 at 09:23:04PM -0500, Chuck Church wrote:
I agree that a /48 or /56 being reserved for business customers/sites is reasonable. But for residential use, I'm having a hard time believing multi-subnet home networks are even remotely common outside of networking folk such as the NANOG members. A lot of recent IPv4 devices such as smart TVs have the ability to auto-discover things they can talk to on the network. If we start segmenting our home networks to keep toasters from talking to thermostats, doesn't this end up meaning your average home user will need to be proficient in writing FW rules? Bridging an entire house network isn't that bad.
Depends on how many devices you have on it. Once you start filling your home with Internet of Unpatchable Security Holes devices, having everything on a single ethernet segment might start to get a little... noisy. Thankfully, IPv6 has well-defined multicast scopes, which makes it trivially easy to do cross-L2-segment service discovery without needing to resort to manually berking around with firewall rules. - Matt