I set my ipv4 to static and it created the /etc/sysconfig/network-scripts/ifcfg-eth0 file for me.
I have it reading as follows
Then I run
systemctl restart network
I test with
ping6 ipv6 dot google dot com -c 5
It works for a while then I see a message about corrupted firewall and the firewall restarts and I can no longer use ipv6
I don’t really need ipv6 but I saw some error logs about hitting google in the mail log. It tries ipv6 first then ipv4 it was always failing on ipv6 so I was trying to set it up.