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Per the other discussion on attributes, I believe the change walks in
historical footsteps and it's a matter of project policy choice.  That
aside, you raised a couple of other issues on IRC:

- backward compatibility with plugins that haven't adapted their API - this
is addressed in the spec, which should have been implemented in the patches
(otherwise I will downvote the patch myself) - behaviour should be as
before with the additional feature that you can now tell more about what
the plugin is thinking
- whether they should be core or an extension - this is a more personal
opinion, but on the grounds that all networks are either trunks or not, and
all networks have MTUs, I think they do want to be core.  I would like to
see plugin developers strongly encouraged to consider what they can do on
both elements, whereas an extension tends to sideline functionality from
view so that plugin writers don't even know it's there for consideration.

Aside from that, I'd like to emphasise the value of these patches, so
hopefully we can find a way to get them in in some form in this cycle.  I
admit I'm interested in them because they make it easier to do NFV.  But
they also help normal cloud users and operators, who otherwise have to do
some really strange things [1].  I think it's maybe a little unfair to post
reversion patches before discussion, particularly when the patch works,
passes tests and implements an approved spec correctly.
-- 
Ian.
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1138958 (admittedly first
link I found, but there's no shortage of them)

On 19 March 2015 at 05:32, Gary Kotton <gkotton at vmware.com> wrote:

>  Hi,
> This patch has the same addition too -
> https://review.openstack.org/#/c/154921/. We should also revert that one.
> Thanks
> Gary
>
>   From: Gary Kotton <gkotton at vmware.com>
> Reply-To: OpenStack List <openstack-dev at lists.openstack.org>
> Date: Thursday, March 19, 2015 at 1:14 PM
> To: OpenStack List <openstack-dev at lists.openstack.org>
> Subject: [openstack-dev] [Neutron] VLAN transparency support
>
>   Hi,
> It appears that https://review.openstack.org/#/c/158420/ update the base
> attributes for the networks. Is there any reason why this was not added as
> a separate extension like all others.
> I do not think that this is the correct way to go and we should do this as
> all other extensions have been maintained. I have posted a revert (
> https://review.openstack.org/#/c/165776/) – please feel free to knack if
> it is invalid.
> Thanks
> Gary
>
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