Hi,
Disculpas, no hablo español. Apologies, I don't speak Spanish, but I think the answer you're looking for is as follows:
From the Resolved Caveats in Cisco NX-OS Release 5.2(1)N1(4) section of the Release Notes:
CSCth06584 The enhancement request filed requesting the "default interface" capability in Cisco Nexus 5000 and 5500 Series switches.
Regards