Created attachment 1756952 [details]
example

Description of problem:
When tried to save Cluster Network CIDR: 10.128.0.0/1 i get:
"address must not be unspecified. Unspecified address is the address with all zeroes"

The issue is that the message is very unclear, and doesn't indicate the user about the real problem.

See attached example


Version-Release number of selected component (if applicable):
Staging, v1.0.16.1

Steps to Reproduce:
1. try to save Cluster Network CIDR: 10.128.0.0/1

Actual results:
"address must not be unspecified. Unspecified address is the address with all zeroes"

Expected results:
a suggestion: Provided cluster network CIDR is illegal