How may I know my centOS supports IPv6

[ermai]

Here is my system information from CentOS 7.3 , does it support IPv6 from the shell prompt?Sorry I am so new for this.

[root@localhost sysconfig]# lsmod|grep ipv6
nf_reject_ipv6 13717 1 ip6t_REJECT
nf_conntrack_ipv6 18935 8
nf_defrag_ipv6 35104 1 nf_conntrack_ipv6
nf_nat_ipv6 14131 1 ip6table_nat
nf_nat 26787 3 nf_nat_ipv4,nf_nat_ipv6,nf_nat_masquerade_ipv4
nf_conntrack 133387 7 nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,nf_nat_masquerade_ipv4,nf_conntrack_ipv4,nf_conntrack_ipv6

[TrevorH]

I moved your post from the CentOS 6 Networking forum to the equivalent CentSO 7 one.

The easy way to find out if you have a working ipv6 stack is to run ping6 ::1 which will tell you if your ipv6 localhost is working. You may need to set routes etc to get to external ipv6 addresses but this will tell you if the stack is there and working at all.

How to correctly disable ipv6 is listed in the CentOS wiki FAQ entries so looking at that and doing the opposite ought to enable it if it has been disabled already. FAQs are found at http://wiki.centos.org/FAQ