You should follow the best practice docs for deployment , providing a config without knowing your setup is pointless really , if you read these it will make things a lot clearer
http://www.cisco.com/c/dam/en/us/td/docs/switches/datacenter/sw/design/vpc_design/vpc_best_practices_design_guide.pdf
https://supportforums.cisco.com/document/125846/vpc-best-practices-nexus-7000-and-5000