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How do I configure device-mapper-multipath for EMC CLARiion or VNX with ALUA mode in RHEL 6, 7?

Solution Verified - Updated 2017-09-20T10:54:29+00:00 -

Issue

How do I configure multipath for EMC CLARiion or VNX for ALUA in RHEL 6?
I am using an EMC Clariion or VNX storage array and wish to configure multipath in active-active mode 4 (ALUA), what are the recommended configurations for active-active multipath?
Seeing "emc: ALUA failover mode detected" logged in messages

Environment

Red Hat Enterprise Linux 6, 7
device-mapper-multipath (DM-Multipath)
EMC Clariion/VNX/Unity storage array in Active-Active mode 4 (ALUA)

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