In case you need TopN talkers usefull output on Cisco IOS-XE you can try customized config like this one:

flow record TOP-N

match ipv4 source address

match ipv4 destination address

collect interface input

collect interface output

collect counter bytes long

collect counter packets long

 

Then create appropriate monitor:

flow monitor TOP-N

record TOP-N

 

On WAN side implement new flow record:

ip flow monitor TOP-N input

 

For showing appropriate results you need quite a long show command:

show flow monitor TOP-N cache sort highest counter packets...

 

HTH,

Dragan

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