On 2019-11-29 00:01, Ralph Seichter wrote: > > The first reason [...] was that my router does _not_ assign fe80::1 to > > itself, but rather some other arbitrary address in the fe80 prefix > > I found an article[1] that I first read years ago. "One method to make > things easier is to manually assign the link-local address to the > upstream router’s interfaces." That's one of the firmware-dependent > things, it may happen automatically. I know that my favourite data > center has its routers set up this way as well. One does not have to use > this method, of course.
> > I did enable the router advertisement feature, and I checked that the > > daemon is running on the router. But I can see no output related to > > that when I run tcpdump on the desktop system. > > Anything that might be interfering with ICMPv6 ? That would prevent all > NDP, including router advertisement. > I only use a static IPv6 address for hosted machines, because I need DNS > AAAA records. The individual subnets are statically assigned by the data > center to each machine. > > At home, I don't configure clients with static IPv6, because it is not > necessary for me. In fact, I'm happy to have the lowest 64 address bits > scrambled (IPv6 Privacy Extensions) to make traffic analysis more > difficult. All local clients can use NDP to locate each other anyway. > > > https://openwrt.org/docs/guide-user/network/ipv6/start > > Sadly I have no practical experience with OpenWrt. Hopefully somebody > else here can help with that. I did make it work with DHCP6. The problems are all with my OpenWrt router. It is free software and I love it, but it has its bu^H^Hquirks. In particular it doesn't seem to be possible to force a particular link-local address on the internal interface. Apart from that, it needs one crucial bit of configuration that's kind of hidden (can't be done via the GUI), to let the router advertisements through. -- Please don't Cc: me privately on mailing lists and Usenet, if you also post the followup to the list or newsgroup. To reply privately _only_ on Usenet and on broken lists which rewrite From, fetch the TXT record for no-use.mooo.com.
