Comment 6 for bug 1528186

as a workaround until the bugfix were released:

[root@fuel /]# dockerctl shell cobbler
[root@fuel /]# sed -e '/dhcp-option-force=210/ s/^#*/#/' -i /etc/dnsmasq.d/default.conf
[root@fuel /]# service dnsmasq restart
[root@fuel /]# exit

this is work until the cobbler syncs again