Question: It appears that further clarification is required on Multi-Enclosure stacking?  As it would seem that this statement would prevent NIC?s 1,2, 3 & 4 on a half-height blade correct? 

 ?In a stacked configuration, bays 1 and 2 of the base enclosure may not contain HP 1/10Gb Virtual Connect Ethernet Modules Bays 3 through 8 within the base enclosure, as well as all bays within other enclosures may contain any of the three Virtual Connect Ethernet modules without issue?

Answer:  This is a question that has been asked a couple times since sending out the Multi Enclosure Stacking drawer statement.  Remember there are three generations of Virtual Connect Modules currently shipping and supported as of today:

VC 1/10 Virtual Connect Ethernet Module

  • VC 1/10F Virtual Connect Ethernet Module
  • VC 10/10 (Flex-10) Virtual Connect Ethernet Module

What we are saying is that the first generation VC module cannot be in bays 1 and 2 of the primary enclosure.  You need to have either the generation 2 or 3 modules in those bays.  The other bays inside of a stacked environment can be the generation 1 module. 

It might be easier to see a side by side example:

Supported Unsupported
       
Enclosure 1 (Primary Enclosure) Enclosure 1 (Primary Enclosure)
Bay 1 VC 10/10 Bay 1 VC 1/10
Bay 2 VC 10/10 Bay 2 VC 1/10
Bay 3 VC 1/10 Bay 3 VC 1/10
Bay 4 VC 1/10 Bay 4 VC 1/10
Bay 5 VC 1/10 Bay 5 VC 1/10
Bay 6 VC 1/10 Bay 6 VC 1/10
Bay 7 VC 1/10 Bay 7 VC 1/10
Bay 8 VC 1/10 Bay 8 VC 1/10
       
Enclosure 2 Enclosure 2
Bay 1 VC 10/10 Bay 1 VC 1/10
Bay 2 VC 10/10 Bay 2 VC 1/10
Bay 3 VC 1/10 Bay 3 VC 1/10
Bay 4 VC 1/10 Bay 4 VC 1/10
Bay 5 VC 1/10 Bay 5 VC 1/10
Bay 6 VC 1/10 Bay 6 VC 1/10
Bay 7 VC 1/10 Bay 7 VC 1/10
Bay 8 VC 1/10 Bay 8 VC 1/10
       
Enclosure 1 (Primary Enclosure)    
Bay 1 VC 1/10F    
Bay 2 VC 1/10F    
Bay 3 VC 1/10    
Bay 4 VC 1/10    
Bay 5 VC 1/10    
Bay 6 VC 1/10    
Bay 7 VC 1/10    
Bay 8 VC 1/10    
       
Enclosure 2    
Bay 1 VC 1/10F    
Bay 2 VC 1/10F    
Bay 3 VC 1/10    
Bay 4 VC 1/10    
Bay 5 VC 1/10    
Bay 6 VC 1/10    
Bay 7 VC 1/10    
Bay 8 VC 1/10    

In essence it boils down to what is the managing module for the stacked domain.  You need to have either a VC1/10F or a VC10/10 module managing the domain.  That is not to say that there can?t be VC1/10 modules in the domain, they just can?t be the managing modules in the domain.

update: a nice document with complete pictures can be found here.