> Do you really want to keep state for hundreds of end user devices in > your equipment? > > In my mind, IPv6 more than ever requires the customer to have their > own L3 device (which you delegate a /56 to with DHCPv6-PD). > > Imagine the size of your TCAM needed with antispoofing ACLs and > adjacancies when the customer has 100 active IPv6 addresses (remember > that IPv6 enabled devices often have multiple IPv6 addresses, my > windows machine regularily grabs 3 for instance).
we do not have to imagine. c & j have both demonstrated the nat scaling problem when protyping for comcast. that is why the idea of a 'carrier grade' nat in the core has become man near-edge nats and ds-lite. it is sorely broken architecture. randy
