Clustering Problem

HI,

My problem is that i want to configure clustering on domain controller and my problem is that i do’nt know how to configure sencond domain controller for cluster.should i connnect my second node to domain contoller or i will have to configure second node to domain controller if i it is require to configure second node to domain controller then my question is that how two domain controller can be configure in same network. Please suggest me it is urgent for me

Thanks