| Our DDOS mitigation platform can't monitor IPv6 |
I don't want to expose my MAC address |
IPv6 isn't an Internet Standard yet |
Hex is hard |
| We don't have a lab to test it |
NAT444 is fine |
IPv6 is just a fad |
It's too hard to support |
| Our vendor doesn't support it |
Our recursive DNS can't handle the extra load |
We forgot to include IPv6 in our last RFP |
We have IPv6, but we just want to keep things simple |
| What do you mean I have to wrap an IP in square brackets? |
Larger headers are less efficient |
Our business intelligence team can't even parse IPv4 logfiles |
IPv6 just isn't a priority |
Made with excuses from 
IPv6 Excuse Bingo