服务器系统：CentOS release 6.6 (Final)

1.修改/etc/sysctl.conf

vim /etc/sysctl.conf

#net.ipv6.conf.all.disable_ipv6 = 1

net.ipv6.conf.all.disable_ipv6 = 0

net.ipv6.conf.default.disable_ipv6 = 0

net.ipv6.conf.lo.disable_ipv6 = 0

2.执行命令 启用IPv6

sysctl -p

3.修改/etc/sysconfig/network-scripts/ifcfg-eth0

#添加下面四行

IPV6INIT=yes

IPV6_AUTOCONFI=no

IPV6ADDR=ipv6地址

IPV6_DEFAULTGW=ipv6网关

4.重启网卡

service network restart

5.查看ip

ifconfig

6.测试

ping6 2001:4860:4860::8888

#谷歌dns地址