On Mon, Feb 22, 2016 at 04:12:36PM +0100, Hannes Frederic Sowa wrote: > On 22.02.2016 16:04, Marc Haber wrote: > >In prose: > > > >The host is a host for KVM VMs. It receives IPv6 connectivity via RA > >on eth0, where the default gateway announces its address as fe80::1. > >It also provides IPv6 connectivity to the VMs via the br0 interface. > >It is running radvd on br0, and for statically configured VMs it has > >also fe80::1 on br0. > > > >If accept_ra_from_local on eth0 were 0, the system would not accept > >the RA from the default gateway and and up with no IPv6 since fe80::1 > >is locally configured with br0. > > Isn't this behavior fixed with > > commit c1a9a291cee0890eb0f435243f3fb84fefb04348 > Author: Hannes Frederic Sowa <han...@stressinduktion.org> > Date: Wed Dec 23 22:44:37 2015 +0100 > > ipv6: honor ifindex in case we receive ll addresses in router > advertisements > > $ git describe --contains c1a9a291cee0890eb0f435243f3fb84fefb04348 > v4.4-rc8~5^2~10 > > ? > > If you don't have fe80::1%br0 bound on exactly that interface, it should > work, no? So, no need for accept_ra_from_local, which has dubious semantics > anyway.
I have accept_ra_from_local set to 0 on all interfaces now, and I still get the dubious default route on eth0. > >If accept_ra_from_local on eth0 is 1, the system accepts both the RA > >from the default gateway on eth0 _AND_ its own RA sent out and > >received on br0, and, making things worse, is setting the IP address > >and default route not on br0, but on eth0. > > Understood. Thanks, I was just able to easily reproduce it. Was already > wondering why someone would enable accept_ra_from_local besides only > testing. I check it out, thanks! Can you reproduce the behavior with accept_ra_from_local =0 as well? Unfortunately, the debugging VM I build works fine, it's just the physical host showing this behavior. This is really strange. Greetings Marc -- ----------------------------------------------------------------------------- Marc Haber | "I don't trust Computers. They | Mailadresse im Header Leimen, Germany | lose things." Winona Ryder | Fon: *49 6224 1600402 Nordisch by Nature | How to make an American Quilt | Fax: *49 6224 1600421
