[root@kmvi_server modprobe.d]# grep ipv6 /etc/modprobe.d/blacklist-net.conf
# out the "blacklist ipv6" line (and be prepared to update this file
# when upgrading module-init-tools), or just add ipv6 to /etc/modules
#blacklist ipv6
blacklist dccp_ipv6
[root@kmvi_server modprobe.d]# modprobe ipv6
FATAL: Module ipv6 not found.
"Нет такой буквы. Вращайте барабан"