I have the same issue with ConfigAdvisor showing an issue with the boot variable. Nothing is flagged in autosupport that I can find. I have only been able to find this thread about the issue.
Error Boot variables bootarg.init.switchless_cluster.enable are not set properly in node wcsonetapp-01. Incorrect values to these bootargs could be detrimental to system health and/or performance. The correct value(s) should be bootarg.init.switchless_cluster.enable="1"The corrective action is to boot each node in the cluster into the loader prompt and use the setenv command on each variable that requires a change