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% Flow Monitor: 'Netflow-Monitor' could not be added to interface due to invalid sub-traffic type: 0

Cisco's Flexible NetFlow (FNF)  in cisco 4500

how to get in and set out on the same interface?

error : % Flow Monitor: 'Netflow-Monitor' could not be added to interface due to invalid sub-traffic type: 0


flow exporter NFAexporter

    destination xxxxx

    transport udp 2055

    export-protocol netflow-v9

    source vlan 254


flow record NFArecord

    match ipv4 source address

    match ipv4 destination address

    match transport source-port

    match transport destination-port

    match interface input

    match interface output

    match ipv4 protocol

    match ipv4 tos

    match ipv4 dscp

    collect interface input

    collect interface output

    collect routing source as

    collect routing destination as

    collect routing next-hop address ipv4

    collect transport tcp flags

    collect counter bytes

    collect counter packets

    collect timestamp sys-uptime first

    collect timestamp sys-uptime last

    collect interface output

    collect flow direction

    collect ipv4 id

    collect ipv4 source mask

    collect ipv4 destination mask

flow monitor NFAmonitor

    record NFArecord

    exporter NFAexporter

    cache timeout active 5

    cache timeout inactive 15

interface GigabitEthernet 6/48

     ip flow monitor NFAmonitor input

     ip flow monitor NFAmonitor output