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.

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