IPv6 invalidated the existing IPv4 addresses, changed the addressing scheme, and de facto got rid of DHCP and NAT in favor of SLAAC and global routing. It doesn't share any state with v4. This was a very different set of choices from just adding more bits to v4.
IPv6 invalidated the existing IPv4 addresses, changed the addressing scheme, and de facto got rid of DHCP and NAT in favor of SLAAC and global routing. It doesn't share any state with v4. This was a very different set of choices from just adding more bits to v4.