Hello andan02,  I see what you are asking, You use the master IP or the name for the MDM cluster to log in. When the master goes down, then you can log into the slave via IP or Name of the MDM cluster. When the master comes back up, you can do a CLI switch master command to go back to the original master or stay with your slave which is now the new master and let the old master become the slave for the MDM cluster.  You cannot access the slave via SCLI or GUI if the master MDM is still up.  Thank you,  G. David Felt EMC ETD Technical Marketing Engineer EMC²| Emerging Technologies Division Office: +1 206-753-1654 Email: david.felt[NAME].com
If a primary MDM goes down, how do I login to the slave using the GUI?  I cannot login to the slave when the primary is up.
Login to slave MDM