[c-nsp] netflow not having stats

Joe Loiacono jloiacon at gmail.com
Sun May 16 08:22:26 EDT 2021


Are you able to see the individual packets via your collector/analyzer? 
Perhaps you could get a hint.

There is a handy tool called 'analyze_netflow_packets' in the FlowViewer 
distribution which will unpack each packet individually.

The distro can be found at flowviewer.net.

Best,

Joe

On 5/16/2021 3:34 AM, james list wrote:
> Dear experts
> I've a netflow configured on ASR1001X which is sending indeed udp packet to
> collector but not displaying anything on the statistics, any idea why ?
>
> Config:
>
> flow exporter EXP_LOGS
>   destination 10.101.11.119
>   source Port-channel5.99   (this is the ip address used to send netflow
> packets)
>   transport udp 2055
>   export-protocol netflow-v5
>
> flow monitor MON_LOGS
>   exporter EXP_LOGS
>   record netflow ipv4 original-output
>
> interface Port-channel5.7  (this is the interface where Netflow works)
>   ip flow monitor MON_LOGS sampler SAMPLER_1 output
>
> sampler SAMPLER_1
>   mode random 1 out-of 1024
>
> Here the statistics at zero, but indeed traffic is arriving to the Netflow
> collector:
>
> Flow Exporter EXP_LOGS:
>    Packet send statistics (last cleared 2d16h ago):
>      Successfully sent:         0                     (0 bytes)
>
>    Client send statistics:
>      Client: Flow Monitor MON_LOG
>        Records added:           0
>        Bytes added:             0
>
> Thanks in advance for any hint.
> Cheers
> James
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