+++ This bug was initially created as a clone of Bug #1575944 +++
To allow virtual machines to access the internet, I have created a bridge on my host computer. For use by the host itself, the bridge is set up to have a private IPv4 address (which is converted to an external address via NAT in my home router), a static private IPv6 address for local communication and a dynamic IPv6 address obtained via SLAAC for internet access.
This setup has worked well with Fedora 26 and 27, but with Fedora 28 the bridge device does not get any IPv6 assigned, not even a link-local one:
$ ifconfig bridge0
bridge0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.0.11 netmask 255.255.255.0 broadcast 192.168.0.255
ether 00:25:22:06:b2:1c txqueuelen 1000 (Ethernet)
RX packets 4118 bytes 3503462 (3.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3613 bytes 448237 (437.7 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
Contents of /etc/sysconfig/network-scripts/ifcfg-bridge0:
Static and link-local addresses are assigned correctly with IPV6_AUTOCONF=no, but then of course the dynamic address for internet access is missing.
The issue does not occur on simple Ethernet interfaces without bridge.
--- Additional comment from Beniamino Galvani on 2018-05-09 09:00 CEST ---
Created attachment 1434258 [details]
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.