Source nat can be done using a pool of ip addresses. Suppose, I have a pool of 64 public ip addresses and I configure my nat enabled router so that whenever packets are sent outside, source nat all connections using this pool of addresses.
Now, my question is that, what am I doing with these addresses actually? Are they all configured in my router interfaces? Or they are for just source nat purpose(I advertise reachability of those addresses by some protocol)?