[ovs-dev] [PATCH 3/4] vswitchd: Add new configuration table for IPFIX collectors.

[Ben Pfaff]

On Thu, Jan 17, 2013 at 02:19:45PM -0800, Ben Pfaff wrote:
> On Fri, Jan 11, 2013 at 09:55:43AM -0800, Romain Lenglet wrote:
> > Signed-off-by: Romain Lenglet <rlenglet at vmware.com>
> 
> The schema limits each bridge to at most one IPFIX collector.  Is
> there an a priori reason why this is limited?  It seems to me that one
> could want to send some samples to one set of collectors and other
> samples to another set of collectors.

One more thing.  sFlow and NetFlow configuration work somewhat
differently from IPFIX configuration.  For sFlow and NetFlow, when the
admin creates the configuration in the database, then it takes effect
immediately without further effort.  IPFIX doesn't work like that, if
I'm reading the code correctly.  Instead, you have to add some
OpenFlow actions to cause IPFIX to be sent to the collectors.  I think
that's a fair way to do it, but I expect that it will surprise users
who are accustomed to the way we've done NetFlow and sFlow, so I would
like to document it in vswitch.xml.  It might also be worthwhile to
mention it in the ovs-vsctl example, and possibly to add a FAQ entry
in the Basic Configuration section.