get service ssh shows root login value enabled and the SSH "service state" as running.PermitRootLogin entry is commented out in the /etc/ssh/sshd_config file on the affected NSX appliance, as in the following screenshot:grep -i passwordauthentication /etc/ssh/sshd_configPasswordAuthentication yesStarting with NSX 4.2.x, the underlying SSH daemon strictly enforces the /etc/ssh/sshd_config directives. The legacy management-plane toggle for 'root-login' no longer overrides the PermitRootLogin directive if it is explicitly set to prohibit-password or commented out."
vi /etc/ssh/sshd_config
"#PermitRootLogin prohibit-password" "PermitRootLogin yes"":") followed by "wq" (means write quit) and hit Enter."q!" instead. /etc/init.d/ssh restart
*Note: If root login still fails you may need to enable root login after restarting SSH
set ssh root-login
Also refer to (KB 324233) Enable ssh root access for NSX appliances