Hi again, It turns out that setting disable_ipv6=0 is not enough to regain working IPv6: Now the RAs from the router arrive at the client, but when the client sends a neighbor discovery, it never makes its way to the router, so the client cannot actually communicate via IPv6. I can see the ND packages on vnet2 on the host, but not on virbr1 (which vnet2 is attached to). Again this is something that worked just fine before the update.
I have no idea what is preventing the ND packages to be forwarded by the bridge. I always thought bridges are just switches operating on layer 2, but it seems that's as from the truth... Kind regards, Ralf
