[ovs-discuss] Collecting NetFlow data

Syed Faraz Ali farazali86 at gmail.com
Thu May 19 19:25:03 UTC 2016


Hello Ben,

Thanks for the prompt responses!

The packets are being collected on the sFlow port 6343 at the same time,
but giving unreachable error for NetFlow. This looks pretty awkward!
Do you have some suggestions to further look into this matter?

To tell you more about the setup, I'm using POX controller and OF v 1.0. I
don't think there's compatibility issues with NetFlow here.

Regards,
Faraz

On Thu, May 19, 2016 at 6:44 PM, Ben Pfaff <blp at ovn.org> wrote:

> On Thu, May 19, 2016 at 06:17:45PM +0200, Syed Faraz Ali wrote:
> > Hello Ben,
> >
> > Thanks for the prompt response.
> >
> > Please have the output from the logs. Below are the logs related to
> > collector, I'm not sure if its related to NetFlow collector or used in
> some
> > other context. Kindly suggest further.
> >
> > *cat /var/log/openvswitch/ovs-vswitchd.log | grep collector*
> > 2016-05-19T16:05:02.575Z|00955|collectors|WARN|Dropped 7 log messages in
> > last 46 seconds (most recently, 6 seconds ago) due to excessive rate
> > 2016-05-19T16:05:02.575Z|00956|collectors|WARN|sending to collector
> failed:
> > Connection refused
> > 2016-05-19T16:06:03.099Z|00957|collectors|WARN|Dropped 11 log messages in
> > last 56 seconds (most recently, 6 seconds ago) due to excessive rate
> > 2016-05-19T16:06:03.099Z|00958|collectors|WARN|sending to collector
> failed:
> > Connection refused
> > 2016-05-19T16:07:03.098Z|00959|collectors|WARN|Dropped 11 log messages in
> > last 56 seconds (most recently, 6 seconds ago) due to excessive rate
> > 2016-05-19T16:07:03.098Z|00960|collectors|WARN|sending to collector
> failed:
> > Connection refused
>
> This tends to indicate that the NetFlow packets got back ICMP port
> unreachable errors.
>
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