| We can use RFC6598 |
We have IPv6, but we just want to keep things simple |
It's too complicated |
IPv6 is just a fad |
| We don't have a lab to test it |
Our DDOS mitigation platform can't monitor IPv6 |
What's IPv6? |
IPv6 is slower than IPv4 |
| No one else has deployed it |
Can't we just buy more IPv4 addresses? |
It'll break our GeoIP |
Hex is hard |
| Larger headers are less efficient |
Our business intelligence team can't even parse IPv4 logfiles |
Our Lawful Intercept doesn't support IPv6 yet |
Vendor bugs |
Made with excuses from 
IPv6 Excuse Bingo