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Network Troubleshooting
ECS Community Edition does not yet support IPv6. The following procedure can be used to disable IPv6 in CentOS 7.
add the following to /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
echo 1 > /proc/sys/net/ipv6/conf/all/disable_ipv6
echo 1 > /proc/sys/net/ipv6/conf/default/disable_ipv6
or
sysctl -w net.ipv6.conf.all.disable_ipv6=1
sysctl -w net.ipv6.conf.default.disable_ipv6=1
CentOS 7 does not assign network interface names as eth0, eth1, etc, but rather assigns "predictable" names to each interface that generally look like ens32 or similar. There are many benefits to this that can be read about here.
This can be disabled as documented in the above link, however, these names can otherwise be simply found and used in the ECS-Community installer without issue. To find the names for each device enter the following command: ip a. This command will output a list of network devices. Simply find the corresponding device and substitute it for eth0 in the stage1 installation script.