As i know,Cisco NX-OS supports one instance of the SNMP per VDC. By default, Cisco NX-OS places you in the default VDC.if you are using multiple VDC than it may the reason that management interface would not not.
I hope it will help you ..
N7K4# debug logfile ospf_vjN7K4# debug-filter ip mpacket interface e1/5N7K4# debug-filter ip mpacket direction outboundN7K4# debug-filter ip mpacket dest 22.214.171.124N7K4# debug ip ospf 5 hello
N7K4# show debug logfile osp...