Just do it.
Just do it.
Well you could accept the default generated one, or set it to fe80::1 manually. Don't most good routers now have a DNS server in? So you could make it router.local or something?
I think some even by default make a DNS entry call router.local or similar pointing to themselves. This isn't a real problem and if IPv6 were adopted fully, then all routers would likely come with something like this setup anyway.