Enable DHCP Relay on Cisco Nexus
From OISecWiki
On normal Cisco IOS routers it's really straight forward, you just do
interface VlanXXX ip helper-address DHCP
On Nexus it's a little bit more complicated. You have to enable the feature, enable it globally and then add it on the interface.
feature dhcp ip dhcp relay int VlanXXX ip dhcp relay address DHCP