nano /etc/sysconfig/network
NETWORKING_IPV6=yes  打开IPv6
IPV6_AUTOCONF=no        不自动获取地址，即：设置"no”

nano /etc/sysconfig/network-scripts/ifcfg-eth0
IPV6INIT=yes    网卡初始化IPv6协议栈
IPV6ADDR=2001:250:4000:2000::53       配置IPv6地址
IPV6_DEFAULTGW=2001:250:4000:2000::1    配置IPv6网关

service network restart   重启网络服务，使配置生效

ping6 ipv6.google.com

Q.E.D.