This is some notes for the post that I did on conditional BGP advertisement.
I found an easier way of seeing the status for the advertise-map. It is
available by looking at the neighbor status, look at the following output.
The prefix is currently being advertised. Then we bring up the interface.
The prefix is no longer advertised. Remember that the BGP scanner runs every
60 seconds by default so it may take some time before we see results.