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The problem is that they designed IPv6 not to be backwards compatible with IPv4 in any meaningful way. Unless you forbid IPv4 traffic on the internet everyone i
by spullara 12y ago
The problem is that they designed IPv6 not to be backwards compatible with IPv4 in any meaningful way. Unless you forbid IPv4 traffic on the internet everyone is going to have to build all software for both for the foreseeable future. If everything works with both, why should you build against the new spec at all?
- TazeTSchnitzel 12y agoIt is backwards-compatible with IPv4. You can route IPv4 over IPv6, and tunnel IPv6 over IPv4. The problem is that IPv4 is not forwards-compatible.
- tjgq 12y agoGiven that worldwide Internet adoption is still growing strong, it is conceivable that sooner or later a significant number of endpoints will only have IPv6 connectivity, or that their IPv4 connectivity will be limited to a private address behind a carrier-grade NAT. Another point to consider is that there are things you can do with IPv6 connectivity that are very difficult/costly, or outright impossible, in NATted IPv4 land. Personally, I'm waiting for the next generation of peer-to-peer protocols that make use of end-to-end IPv6 connectivity instead of hole-punching and proxying through third-parties. (Case study: ever thought how ridiculous it is that in 2015 it's still non-trivial to send a large file to someone over the Internet without using some sort of storage service?) It's plausible that one of those new applications could end up being the "killer app" for IPv6.