I have the next question, If i interconnect two arrangement of Cisco Nexus UCS 5k by an VPC between them, i will have problems with that connection, i will have some impact?; there is any problem with the Vpc domains between them?
Ok, than that should not be an issue. You connect all 4 5ks full meshed together and put them in one vPC.
I have done it between 5ks and 7ks, but it should work the same way when they are all 5ks.