| Dear Rob:
Apologies for our delayed answer. We are now working in the revision to submit v09 by compiling all the comments.
As you mentioned, we want to avoid any further delay. As we mentioned to Chris in the past (i2nsf mailing list), we do not have any problem to include some additional text (e.g. “-sdn-" in the module names). Therefore, Rob, we agree with your point of view about this.
In summary, we are working in the next revision v09, and our idea to address Chris’ comments was to include -sdn- to the module names.
We hope this is fine.
Best regards.
Hi draft authors, Chris, Can we also please try and close on this issue raised by Chris. Chris, I don’t think that there is any great way to solve this issue using YANG features, but presumably the constraint could be enforced with a must statement, or groupings could be used to copy parts of the ipsec structure into an sdn specific ipsec tree structure. I understand that there isn't any great desire to delay these drafts by trying to generalize the ipsec YANG model contained within it. However, I think that means that the modules should have "-sdn-" in their names to indicate that they are intended specifically for the SDN use case, and should not be confused with the more generic ipsec YANG modules that have been proposed. Regards, Rob -----Original Message-----
From: yang-doctors <yang-doctors-bounces@xxxxxxxx> On Behalf Of Christian
Hopps
Sent: 24 August 2020 18:08
To: Martin Björklund <mbj+ietf@xxxxxxx>
Cc: i2nsf@xxxxxxxx; draft-ietf-i2nsf-sdn-ipsec-flow-
protection.all@xxxxxxxx; ipsec@xxxxxxxx; last-call@xxxxxxxx; yang-
doctors@xxxxxxxx
Subject: Re: [yang-doctors] Yangdoctors last call review of draft-ietf-
i2nsf-sdn-ipsec-flow-protection-08
[adding in ipsec@]
Hi,
This draft was discussed in ipsecme at the last IETF, and there was a
desire to look closer at a couple changes that would make these models
usable by ipsec generally rather than only for SDNs. Otherwise we will end
up with 2 models that look very similar and duplicate almost all the
functionality. This was going to be done during the next yang doctor
review, but it looks like that happened in the meantime (ships in the
night).
At minimum the module names should include "-sdn-" if no other changes are
made to indicate that they are only for sdn use; however, this is not the
optimal solution.
A better solution would be to move the containers currently under ikeless
(for SA and Policy databases) under ipsec-common.
The feedback I received from the authors was that the SDN controllers
didn't care about the actual SAs and policies when using IKE so they
didn't want to require someone implementing ike+common modules to have to
support them.
The YANG question I suppose is, is there an easy way to move these
containers from ipsec-ikeless to ipsec-common, but still allow for them to
be empty and/or unimplemented for the SDN IKE use case? If they were made
features, is there a proper YANG way to indicate that if the ikeless
module is present then those features must also be supported thus matching
the functionality as defined by the current draft?
Thanks,
Chris.
On Aug 24, 2020, at 10:37 AM, Martin Björklund via Datatracker
<noreply@xxxxxxxx> wrote:
Reviewer: Martin Björklund
Review result: Ready with Nits
I did an early YANG Doctor's review of this draft. Most of my
comments then have been addressed in this version.
Comments:
o As I wrote in my early review, the RFC editor enforces a common
format of YANG modules, so it is better to adhere to this format
before sending the draft to the RFC editor. Use
pyang -f yang --yang-line-length 69 <FILE>
to get a consistent look-and-feel for your module.
(You will have to manually re-flow description statements after
this.)
o There are some leafs that are optional in the model, but w/o a
default value and w/o an explanation of what happens if that leaf
is not set. You should find those and either make them mandatory,
add a default value, or explain what it means when it isn't set.
As an example,
/ipsec-ike/pad/pad-entrypeer-authenticatin/pre-shared/secret
is optional. I suspect that this leaf needs to be mandatory.
Another example is the leaf espencap.
/martin
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