IPv6 Excuse Bingo| IPv6 is a security risk | It's not supported by Google Compute | There's no certification track | It'll break our GeoIP | IPv6 is slower than IPv4 |
| It's not mature enough | No one else has deployed it | It's too complicated | Too many people have broken IPv6 stacks | Our DDOS mitigation platform can't monitor IPv6 |
| What do you mean I have to wrap an IP in square brackets? | IPv6 isn't an Internet Standard yet | |
Larger headers are less efficient | IPv6 is just a fad |
| I don't want to expose my MAC address | It's on our roadmap | End users don't care about IPv6 | Can't we just buy more IPv4 addresses? | NAT444 is fine |
| Android doesn't support DHCPv6 | Our Lawful Intercept doesn't support IPv6 yet | Azure doesn't support it | There's no ROI on deploying IPv6 | We have no roadmap for native IPv6 as we rolled out 6RD. |