Grid control Repository

i am creating a database which acts as a repository for grid control .
i am following a guide which told me that i need to create a listener with 1521 port only?

        1521 is allready used by different database so can i use different port?

is it really effects grid control installation?
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One listener is sufficient for one node unless you are expecting a very large number of connections. It's only listener listening for database connections, not databases. You can skip the listener creation step and proceed further.
rcc50886Author Commented:
i didnt undestand exactly. can you please explain me?

as i try to create a listener with 1521 its saying its allready in use,....
A Listener is a component that will help listen for incoming database connections and pass them on to the database. A listener can listener for any number of databases that are on the same host. In your case, there is already one listener on the host, so, you do not need to create one more listener. If you want to create a separate a listener for your repository database, then you will need to choose another port eg:1530 and provide the details during the Grid Control installation.
You may want to refer to the concept of Listener once for more clarity:


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