Description of problem: The script gogoc invokes to configure its tunnel - /etc/gogoc/template/linux.sh - uses the deprecated "route" command from net-tools instead of the current "ip route". In addition, the "route" command at this time creates IPv6 routes with a default metric of 1, this means that routes created by gogoc will take priority over native IPv6 connectivity discovered from local router advertisements.
gogoc-1.2-36.fc20 has been submitted as an update for Fedora 20. https://admin.fedoraproject.org/updates/gogoc-1.2-36.fc20
Adding myself as CC as I wonder why it is a problem that specific tunnel routes create a problem (even when they have a less specific metric the route still has a longer prefixlen, or?) What metric would the new version use?
This update creates the routes with a metric of 1024. It also adds a low route preference in the radvd config: AdvDefaultPreference low;
Package gogoc-1.2-36.fc20: * should fix your issue, * was pushed to the Fedora 20 testing repository, * should be available at your local mirror within two days. Update it with: # su -c 'yum update --enablerepo=updates-testing gogoc-1.2-36.fc20' as soon as you are able to. Please go to the following url: https://admin.fedoraproject.org/updates/FEDORA-2014-2687/gogoc-1.2-36.fc20 then log in and leave karma (feedback).
gogoc-1.2-36.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.