BGP on LTM

Thanks , now i found the steps to enable & Configure BGP , one more question :

 

at the below solution it is shown how to configure route map to filter advertised BGP routes , but i want to make sure that F5 will Rx no routes from Router ( Filter incoming ) , how to do it ?

 

http://support.f5.com/kb/en-us/solutions/public/6000/100/sol6165