For now, to start a new UCS domain, my customer would want to configurate an Ethernet Uplink with only 1 port/FO. So, we are going to configurate a Po with 1 port.
In case of failure of this link, do all vNIC using this uplink fail ?
I mean, the vmnic from the WMare vswitch are going down if this Ethernet uplink failed ???
If you have failover enabled on the UCS vNIC level, the vNICs would move to the other fabric interconnect. For example, if the vNIC is initially pointing to FI A and if the port-channel on FI A goes down, UCS vNIC failover capability would kick in and move the connection to FI B. The vmnic on ESX won't be aware of this.
If you do not have failover enabled, then the NIC would go down on the UCS (and on ESX)