Re: [tcpm] [GROW] How to reuse the tcp model in the BMP model - asking for suggestions

[Camilo Cardona <[e-mail]>]

Hello all,

First of all, thanks to Jeff for giving us a bit more hints about how to use the tcp model. We’ll try to see how to leverage it as much as possible.

Michael,

The draft mentions Maximum Segment Size  in section 3.1, first point (“Typical examples are the Maximum Segment Size (MSS) or configuration related to hardware offloading.”) but I don’t see it anywhere in the model. I would assume that you don’t want to include it. Still, This is sort of confusing, at least to me.
Since I couldn’t fully understand what your goal with that example is, I cannot offer a suggestion for making it clear, however I think it would be nice if you take a look at that sentence.

Thanks,
Camilo C

On 25/7/22, 14:12, "Jeffrey Haas" <[e-mail]> wrote:

    Camilo,

    Responding somewhat late to this thread, but I think that you will find that
    the latest updates to the tcpm module addressed most of your concerns, if
    not all of them.  The BGP YANG module, as Michael notes below, helped refine
    some of the use case scenarios.

    The audit was primarily covering how to use authentication.  Some additional
    focus on other TCP properties might be worth evaluating.


    -- Jeff

    On Tue, Jun 21, 2022 at 09:12:36AM +0000, Scharf, Michael wrote:
    > Hi Camilo,
    > 
    > There are existing examples for YANG modules that model application-specific configuration for TCP connections, such as:
    > 
    >   *   draft-ietf-idr-bgp-model
    >   *   draft-ietf-netconf-tcp-client-server
    > 
    > I would assume that BMP could be modeled like that.
    > 
    > Note that the model for TCP-AO authentication has changed in draft-ietf-tcpm-yang-tcp-07 because of last call comments, i.e., some model aspects can still be subject to change.
    > 
    > Michael
    > 
    > From: Camilo Cardona <[e-mail]>
    > Sent: Friday, June 17, 2022 4:37 PM
    > To: Scharf, Michael <[e-mail]>; [e-mail]; [e-mail]
    > Cc: [e-mail]; [e-mail]
    > Subject: Re: How to reuse the tcp model in the BMP model - asking for suggestions
    > 
    > 
    > Hello Michael,
    > 
    > 
    > 
    > First of all, thanks for considering our questions and letting us know about this new version.
    > 
    > 
    > 
    > Please keep in mind that the BMP model draft is in very early stages, not even a WG draft yet, it might change in the future. So, we apologise if we cannot give you exact requirements.
    > 
    > 
    > 
    > Having said that, it will feasible that the model will need to include multiple TCP configurations. Defining the connection might be specific to the application, but BMP requires other  features like authentication, MSS, keepalives which seem general enough. What we wanted was to leverage other model for this, if existing.
    > 
    > 
    > 
    > Thus, I guess the most general question we can make is , How is the recommended way of reusing the tcp model?
    > 
    > 
    > 
    > Thanks,
    > 
    > Camilo Cardona