Adding additional managed server to already existing oracle forms and reports domain

 Hi,

I want to know if i add another managed server to already existing oracle forms and reports 11g (11.1.2.0) 

 Do i have to manually add a managed server  and add to cluster 

or

 Should i use the config.exe (config.sh) of forms and reports 11g and then select extend domain. 

regards 

Samad Ul Haq