Thanks Thomas. Going into debug was able to point me in the right direction. For those stumbling on this like myself, the "ipv6.method=shared" refers to your *LAN* interface, not your WAN interface. While this might seem intuitive to some, when I think "shared" I think of the WAN though that is mostly a holdover from IPv4 conventions.
In an earlier fit of desperation I had tried setting the LAN interface to "shared", but at the time ipv6 ICMP was unintentionally blocked by the firewall which was preventing the negotiation with my ISP from happening. I eventually figured it out that it was the firewall when I switched to wide-dhcpv6 using the known working config I had used with my old router, but I never went back to try setting the LAN interface to shared. After switching to debug I was able to see that the errors hinted at NM trying to find an interface(device) other than my WAN to assign a range to. The informational level message "no device to obtain a subnet to share on <interface> from" sort of gives this away but by itself can appear a bit cryptic, especially if like me you don't fully understand how ipv6 works. I think it would really help out if the documentation had a smidgen more detail, even if it was just a "for example if you are configuring a router for prefix delegation you would want to set your LAN/local/whatever interface to shared mode". Maybe it's already supposed to appear obvious but I definitely missed it, for what it's worth. Thanks again Thomas and thanks Vladimir; your earlier post was what made me aware Network Manager began supporting prefix delegation in the first place. ~dag On Wed, Sep 5, 2018 at 8:11 AM Thomas Haller <thal...@redhat.com> wrote: > > On Tue, 2018-09-04 at 09:29 -0500, dag dg via networkmanager-list > wrote: > > > > There doesn't seem to be much documentation for Network Manager on > > the > > prefix delegation support. Any insight would be appreciated. > > Hi, > > > it's not much documented, because there isn't much to configure about > ipv6.method=shared. It's supposed to just work -- except when it > doesn't. > > Could you provide a full logfile with level=TRACE enabled? > > See the hints about logging at > https://cgit.freedesktop.org/NetworkManager/NetworkManager/tree/contrib/fedora/rpm/NetworkManager.conf > > > best, > Thomas _______________________________________________ networkmanager-list mailing list networkmanager-list@gnome.org https://mail.gnome.org/mailman/listinfo/networkmanager-list
