It's not just a matter of implementing "enable_ipv6 = yes" on a cisco router. Here's an enterprise perspective: It's IP address management. it's massive recon

It's not just a matter of implementing "enable_ipv6 = yes" on a cisco router. Here's an enterprise perspective: It's IP address management. it's massive reconfiguration of every node and network endpoint. It's auditing and completely redeploying security measures that are network based. It's training every IT employee on network basics from the ground up. It's millions upon millions of dollars in man-hours and infrastructure and tooling for something that might have marginal benefit on an internal network. I agree the new world will be better with larger subnets and many of the features of IPv6, but it's more complex. Fiber-optic and hardware level upgrades touch a lot fewer devices, and are transparent to users and applications.