[ovs-dev] [PATCH 02/24] nx-match: Do not include NXM only matches when putting an OMX match

[Simon Horman]

On Tue, Jul 24, 2012 at 11:53:49AM -0700, Ben Pfaff wrote:
> On Mon, Jul 23, 2012 at 03:16:31PM +0900, Simon Horman wrote:
> > Suggested by Isaku Yamahata
> > 
> > Cc: Isaku Yamahata <yamahata at valinux.co.jp?
> > Signed-off-by: Simon Horman <horms at verge.net.au>
> 
> I don't think I agree with this idea.  There is no incompatibility
> between OXM and NXM and in fact the NXM classes are reserved
> explicitly in OF1.2 for Nicira use.  What's the benefit to omitting
> important details from a flow?

Is the implication of this that a parser should just ignore fields that it
doesn't understand?

The reason that this came up was that I was testing OVS using Ryu and
Ryu does strict parsing, complaining bitterly if a field which it
doesn't understand is present.