PRVF-7617 : Node connectivity between "SEZ08WTR-0723 : 192.168.3.***" and "SEZ08WTR-0724 : 192.168.3.***" failed TCP connectivity check failed for subnet

My Oracle 11G R2 GRID insttaltion failed at the end of the installation in windows 2008 R2 nodes with Oracle Cluster Verification Utility failed Error.
I clicked NEXT tab to proceed and completed INstallation. found below Errors in INstallActions.log

INFO: ERROR:

INFO: PRVF-7617 : Node connectivity between "SEZ08WTR-0723 : 192.168.3.198" and "SEZ08WTR-0724 : 192.168.3.199" failed

INFO: TCP connectivity check failed for subnet "192.168.3.0"

When I executed Cluvfy with post option given same Error and failed requisites.

cluvfy.bat stage -post crsinst -verbose -n SEZ08WTR-0723,sez08wtr-0724

If we proceed to create the database with the above Errors, It will create the problems.

In my case problem with host names  node 1 host name with all capital letters and Node 2 host name all small letters. But when i execute Cluvfy it is taking all capital letters (from domain) for host names and
checking prerequisites.

Solution:

I have changed my Second node host name to capital letters and tested Cluvfy, it went successful with out any Errors.