You can test the connectivity of CP server using the cpsadm command.
You must have set the environment variables CPS_USERNAME and CPS_DOMAINTYPE to run the cpsadm command on the VCS cluster (client cluster) nodes.
To check the connectivity of CP server
# cpsadm -s cp_server -a ping_cps
where cp_server is the virtual IP address or virtual hostname on which the CP server is listening.