Thanks for the link.
my query was more initial level...
I solved my query.
I installed Embedded Rsso for repo and for cdp. so i have 2 Rsso.
i was checking only Repository's Rsso and did not know there is also Rsso for cdp.. (just out different port number on the url)
and i understood there is a way that is able to sync Repo's Rsso and Cdp's Rsso.