I am just wondering why even in the survey there is no question about some network training?
The network is just a very important fundament for the rest, especially for such courses related to OpenStack & OpenShift. Honestly, some time ago when I wanted to build my network fundaments, I had to take Cisco CCNA. If you had such training, you would be able to take some market share from Cisco. There are many topics like basic network on RHEL (settings, bonds, VLANs), theory (OSI & TCP/IP), kernel internals, KVM virtualization, Open vSwitch, in general SDN, example implementations and solutions in OpenStack/OpenShift etc. etc.