rancher root@rancher:~# ifconfig eth0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.211.55.4 netmask 255.255.255.0 broadcast 10.211.55.255
inet6 fdb2:2c26:f4e4:0:21c:42ff:fe54:a3e6 prefixlen 64 scopeid 0x0<global>
inet6 fe80::21c:42ff:fe54:a3e6 prefixlen 64 scopeid 0x20<link>
ether 00:1c:42:54:a3:e6 txqueuelen 1000 (Ethernet)
RX packets 324692 bytes 450713310 (429.8 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 162486 bytes 10369988 (9.8 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
编辑/etc/sysctl.conf配置，增加net.ipv6.conf.all.disable_ipv6=1
echo "net.ipv6.conf.all.disable_ipv6=1" >> /etc/sysctl.conf
执行sysctl -p
编辑/etc/sysconfig/network增加NETWORKING_IPV6=no
echo "NETWORKING_IPV6=no" >> /etc/sysconfig/network
确保/etc/sysconfig/network-scripts/ifcfg-eth0 没有关于IPv6的设置
关闭防火墙的开机自启动
systemctl stop ip6tables.service
systemctl disable ip6tables.service
systemctl stop firewalld
systemctl disable firewalld
重启网络看看：
systemctl restart network
