What are the benefits of using Weblogic Node Manager to work with VCS agent 4.1?

Hi,

 

I am seeking for reasons to configure Weblogic (9.2) Node Manager to work with VCS Weblogic agent 4.1 for HA. I know I can define 'admin server' or 'managed server' to achieve the HA but the installation guide says 'Symantec recommends configuring Node Manager while working with HA products'. What are the benefits?

 

Thanks,

 

JZ