>Windows will try to auto configure with a 169.254 link local if DHCP is unavailable. Not sure if anyone is actually using them for LAN. They come up sometimes

>Windows will try to auto configure with a 169.254 link local if DHCP is unavailable. Not sure if anyone is actually using them for LAN. They come up sometimes in point to point or for other shenanigans (commonly on cloud or virtualized networks for special services) I've seen it done few times for niche devices and I've done it a few times when I needed a really quick network operational and didn't want to bother setting up any supporting infrastructure such as a DHCP server. Never for any production environment though. I've toyed around with an IPv6 link local only environment but browsers don't support adding the zone identifier[1] for link local addresses. There's workarounds but in most cases for a fully isolated network it's about the same effort to setup a small DHCP server somewhere. That said it's not a comprehensive solution, Android AFAIK still won't support DHCPv6. To get that to work AFAIK requires router advertisements and some more odd finagling if privacy extensions are enabled on the device. [1]https://ungleich.ch/u/blog/ipv6-link-local-support-in-browsers/ https://ungleich.ch/u/blog/ipv6-link-local-support-in-browse...