I am trying to set up netflow on several trunk ports on this switch

 

When I go into the interface I do not have the command ip route-cache flow

 

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This is what my config was going to be but I got stopped at configuring the interface

 

config t
int gi2/1
ip route-cache flow
exit
ip flow-export destination xxx.xx.xxx.xx xxxx
ip flow-export source gi2/1
ip flow-export version 5
ip flow-cache timeout active 1
ip flow-cache timeout inactive 15
snmp-server ifindex persist