[CentOS] CentOS 7 boot network problem

I rebooted a new CentOS 7 host and it attempted to start postfix and
apache before the network came up. Needless to say both complained
that they couldn't bind to the requested IP address and "entered the
failed state."

Did I miss an option somewhere? The network config is a manual one, 
and I see from the generated file in /etc/sysconfig/network-scripts
that ONBOOT="yes"...

-- greg