> On Monday 17 June 2019, Gene Heskett <ghesk...@shentel.net> was heard > to say: > >> How is that resolved, by unroutable address blocks such >> as 192.168.xx.xx is now? > > Yes, IPv6 does have such allocations. The first 64bits is network > block, then the last 64bits are your local machine. > > fc00:: is the non-routed network. RFC1918 equiv.
More precisely fc00::/7, of which fc00::/8 is unused, and fd00::/8 is what you should _randomly_ allocate your local /48 from. > fe80:: is the link-local address which is not routed at all, it is > used solely between your device and the router. Personally, I would > have combined these two, but when IPv6 was being built they didn't > ask me. Me neither, but I think the purposes are different enough to keep them separate. > Having fc00::MAC as a non-routed local RFC1918 default would have been > sooooo much easier, but no, IPv6 was not designed by network > engineers. It was designed by old AT&T phone engineers who were > pissed they were being put out of a job by competition, and wanted to > curse the world with increased complexity where none was needed. link local addresses are strictly limited to the link, whereas fd00::/7 addresses are for your site, so you can route them around your own networks as much as you like - I'm linking a few networks and VPSs with them over openvpn. https://en.wikipedia.org/wiki/Unique_local_address Richard
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