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anyfootoday at 12:02 AM1 replyview on HN

You can use link local for whatever you want, I don't think there's a restriction, is there?

Even though it's rare, I actually do use it if I want to talk to another host on a very specific interface. Sometimes there's multiple paths.


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OptionXtoday at 12:22 AM

I when to check and I think I get it now, the link-local is routeable (switchable?) but only at the local level, but then you might ask why bother with SLAAC at all then. It's due to router being unable to route anything with a link local origin or destination as they are not globally unique so if you need to talk to anything past layer 2 you need unique-local address (or global).

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