On Wed, Jun 20, 2012 at 04:15:33PM +0900, FUJITA Tomonori wrote:
> On Wed, 20 Jun 2012 13:09:13 +0900
> Simon Horman <[email protected]> wrote:
> 
> >> > In general the policy for other differences, in particular different
> >> > wildcard rules, is to adopt the most general rule for both OXM and NXM.
> >> > 
> >> > Personally I might have chosen to implement stricter enforcement of OXM 
> >> > and
> >> > NXM parsing. However, it does simplify the code and I believe that is why
> >> > Ben Pfaff prefers the approach taken by Open vSwtich. And I'm not 
> >> > entirely
> >> > convinced that stricter parsing would be a win in practice.
> >> 
> >> What the strict enforcement means?
> > 
> > This is not an example based in fact, but for the sake of discussion
> > suppose that NXM allows masking of port numbers and OXM does not. In
> > that case the Open vSwtich decoder would actually allow masking
> > of port numbers for both OXM and NXM. Thus the parser does not
> > strictly enforce the Open Flow 1.2 specification of OXM. That is what I
> > meant by strict.
> 
> I see.
> 
> btw, about Ryu, I have no intention to share the parser between NXM
> and OXM. NXM will be extended from now on. 1.1, 1.2, 1.3 OXM will
> not. I don't want the possibility of the regression to the existing
> version of OXM when I extend NXM. I have no problem about sharing the
> code that is unlikely to be changed in the future between NXM and OXM
> however I don't think that it's a good idea that OXM uses NXM's
> ever-evolving code.

Thanks, I understand your motivation.

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