Be careful on software version for the Cisco Nexus 931080YC-FX for Dual fex support
This is a very model specific issue, Nexus 9K has added support for dual homed fex. As of software version Cisco NX-OS Release 7.0(3)I5(2)
As per this document
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus2000/sw/configuration/guide/n9k_rel_703I11/b_Cisco_Nexus_2000_Series_NX-OS_Fabric_Extender_Configuration_Guide_for_Cisco_Nexus_9000_Series_Switches_Release_7x/b_Cisco_Nexus_2000_Series_NX...
The dual-homed FEX (active-active) topology is supported beginning with Cisco NX-OS Release 7.0(3)I5(2) for Cisco Nexus 9300 and 9300-EX Series switches.
This is not entirely true for the Nexus 93180-YC-FX you actually need to be running on a version 9.2(1)
Hidden in this Additional notes in this Cisco document is the little gem that is only supported in version 9.2(1) for this Nexus Model
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/hw/interoperability/fexmatrix/fextables.html
Beginning with Cisco NX-OS Release 7.0(3)I7(3), the Cisco Nexus N9K-C93180YC-FX supports straight-through FEX with N2K-C2232PP and N2K-C2248TP FEX models in NX-OS Mode. Dual-homed FEX is added in Cisco NX-OS Release 9.2(1)
Hope this help some others looking for info on Dual Homing FEX to these devices.
