10. Who the fcsk wants to ping 2001:0db8:85a3:0000:0000:8a2e:0370:7334 on a daily basis ?!?
9. As *some* organizations migrate to IPv6, their IPv4 addresses will be released for use by other organizations!
8. IPv6 is a waste of bandwidth with its huge headers. PPS (packets per second) router ratings go way down - so you shorten your network hardware life-cycle + pay much more bandwidth while payload throughput is the same is less - this is very wasteful.
7. Re-training your entire IT staff on IPv6 is going to be a huge pain in the *** and will drive costs up, not only in training but the extra downtime caused in the first couple of years due to human error.
6. Initially you'll likely have to increase your IT budget just to purchase IPv4 to IPv6 gateways, as few large organizations are going to attempt a big-bang flip.
5. The probability of errors in troubleshooting & configuration increases 4 fold as the addresses are 4 times as long, nevermind they are Hex to boot.
4. 95% of the features of IPv6 can and area already being done in IPv4 years ago.
3. There's tonnes of free $$ to be made in renting out IPv4 space in Asia. Just ask the Telcos!
2. Organizations running critical propriatary software (i.e. not off the shelf) (i.e. banks, hospitals, military, etc) are going to have to spend BILLIONS in software re-writes, QA & testing... for what visible gains. Where's the IPv6 ROI case ?!??
1. And lastly, don;t forget KISS and If it ain't broke... DONT FIX IT!
Wake me up when * I * run out of IPv4 addresses.
Adeptus