On Wed, Sep 21, 2016 at 10:46:04AM +0200, Ben de Graaff wrote:
> I'm currently working on traffic analysis for detecting various security
> events on a network and finding flow paths throughout the network. Part
> of this work includes tracking/visualizing network flows on a
> per-host/per-port basis.
> 
> 
> For this I'm currently working with OVS since it supports OpenFlow (used
> to orchestrate the network), sFlow, and IPFIX, which is working wonderfully.
> 
> One caveat however is that, while IPFIX supports useful features such as
> caching flows and limiting the amount of packet parsing I have to do, it
> does not include the in/out port the flow was seen on.
> 
> On the other hand sFlow *does* include that information (and even the
> OpenFlow port!), but doesn't have the caching feature and requires
> parsing headers at the collector.
> Since we're also experimenting with high sampling rates, I feel it would
> be best if we could avoid that.
> 
> 
> So my question is, is there a specific reason that the IPFIX
> implementation does not include e.g. ingressInterface and
> egressInterface? Could this be added?
> And are there any plans to augment the default IPFIX template, or
> perhaps even allow the user to select from e.g. various detail levels?

I'm surprised that it's not included in IPFIX.  I don't know of a reason
why it's not included.  I haven't heard of anyone say that they're
working on it.  We'd be open to accepting a patch to implement this
feature, if you have one.
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