[netflow-tools] Softflowd and VLAN tagged packets

Craig Weinhold craig.weinhold at cdw.com
Sun Feb 17 09:29:07 EST 2013

I can't speak for softflowd, but I do know that the NIC and/or kernel may be able to strip/preserve VLAN tags on promiscuous ports. See:


As an aside, keep in mind that a packet routed from VLAN X to VLAN Y might show up twice on your mirror port if both VLANs are being mirrored.


On Sat, 16 Feb 2013, Jan Markus wrote:

> Hello,
> we have a mirror port on our core switch and need to create Neflow v9 from
> packet flows. But softflowd seems to read only packets with no VLAN tag. Is
> there a way to change this behaviour? All packets comming from our mirror port
> have VLAN tag. If the change of code would be needed, we'd ready to pay for
> it. We really need this function.
> Thank you very much,
> -Jan
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