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I'm seeing all in traffic passing through interface, but no out traffic.
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  1. Run the command: 
    show ip interface brief | exclude unassigned
    to list all L3 interfaces that have assigned IP address.
  2. Check if you enabled ip route-cache cef or ip route-cache flow on all L3 interfaces.
Also read
document I configured NetFlow on Cat6500, but application shows only a few MBytes, whereas it should have been several GBytes.
document I have interface Vlan2 with record ip route-cache flow, but I have never seen traffic of this interface, although, other VLAN interfaces present in statistics.

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