What is the wisdom / reasoning behind needing to give a /56 to a Residential customer (vs a /64).
What happens when the resident pulls their car into their garage and their car requests a unique /64 so the various computers on the CAN can start syncing with the Internet? Car's media center starts downloading new music, engine controller uploads diagnostics, GPS navigator starts downloading new maps, etc. Different example: people like Jim Gettys and Dave Taht are pushing for consumer routers to start routing between WiFi and Ethernet instead of bridging the two out of the box, since WiFi tends to fall over so hard on multicast/broadcast traffic. Suddenly their router needs two subnets, and either one of them doesn't work, or they have to live with reduced WiFi performance. -- Kenneth Finnegan http://blog.thelifeofkenneth.com/