[c-nsp] N5500 v6.x orphan ports & one-arm traffic

[Lee Q]

Somewhere I heard that version 6.x NX-OS improved handling of orphan 
ports in the N5500 series. But the peer link still drops non-IGMP 
transit traffic.  Any improvements in v6.x with respect to supporting 
one-armed devices upstream or downstream?

Also are there any caveats for creating a dedicated non-vpc trunk (with 
STP of course) between two Nexus 5500 to pass one-armed traffic?

Lee