On Thu, 27 Jan 2011, Antonio Querubin wrote:
Bridged ethernet across the broadband provider network to the ISP router. Each customer gets a single /64 vlan to their residence. If the customer now wants more than one subnet, the ISP must now route additional prefixes to a customer's gateway. The customer can't just setup a router to break up the single /64 without the ISP carrying a route entry or the customer doing some kind of IPv6 NAT or proxy ND. If the ISP wont route additional prefixes, then the customer is forced to do the latter.
You do NOT want to keep state for all the devices in the customer residence. Your ND table will be enormous. We already have problems with ARP on our larger residential aggregation routers, I don't even want to think about what it'd look like with 10+ devices in peoples homes in those /64:s, each perhaps using multiple IPs. Your ND traffic will be enormous. It's much cleaner to require a CPE at he customer prem, run LL only between CPE and PE, DHCPv6-PD a /56 or larger, and now you're done with it. No need to keep state for customer home devices, you just have to handle the CPE. Minimal TCAM usage, minimal state handling. -- Mikael Abrahamsson email: swmike@swm.pp.se