Please configure the below commands in the device to export netstream packets to the NetFlow Analyzer server:
System-view
ip netstream export host (ip address) 9996
ip netstream export source interface (ip address)
ip netstream timeout active 1
ip netstream timeout inactive 15
ip netstream export version 9 origin-as
ip netstream export version 9 bgp-nexthop
ip netstream mpls label-positions
Please configure the below command in all the interface of the device
ip netstream inbound
Please refer this link to configure Netstream exports on H3C devices.