VMAX 20K has two MIBEs, VMAX 40K has 4 MIBEs.  The modules on the director boards that connect to the MIBEs are called Systems Interface Boards (SIB).  VMAX 20K directors have 1 SIB with a connection to each MIBE, so 2 connections to the Virtual Matrix per director, or 4 per Engine.  VMAX 40K directors have two SIBs, each SIB has 2 ports, each port connecting to a different MIBE, so 4 connections to the Virtual Matrix per director, or 8 per engine.  Download the Symmetrix Viewer from Powerlink.  You can drill down into each system and look at all of these components.  It's pretty cool.
How many Matrix Interface Board Enclosures will have in Vmax Engine ? Thanks in Advance
How many MIB's will be there in vmax engine ?