Re: [netconf] Adoption poll for tcp-client-server and http-client-server draft

"Scharf, Michael" <Michael.Scharf@hs-esslingen.de> Tue, 26 March 2019 14:54 UTC

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From: "Scharf, Michael" <Michael.Scharf@hs-esslingen.de>
To: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
CC: Mahesh Jethanandani <mjethanandani@gmail.com>, Netconf <netconf@ietf.org>, "tcpm@ietf.org" <tcpm@ietf.org>
Thread-Topic: [netconf] Adoption poll for tcp-client-server and http-client-server draft
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Date: Tue, 26 Mar 2019 14:54:36 +0000
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Subject: Re: [netconf] Adoption poll for tcp-client-server and http-client-server draft
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Hi Juergen,

The document includes TCP keepalives configuration and this is actually about TCP protocol engine internals, no?

And I fail to see the benefit of doing TCP YANG modeling specific to NETCONF or RESTCONF. For instance, on a router, I believe that NETCONF, RESTCONF, BGP and LDP could use the same TCP stack, as well as possibly all other TCP-based protocols running on the NE. And if HTTP is included, YANG models have a pretty broad applicability beyond routers. So what makes NETCONF or RESTCONF so special that NETCONF needs its own model?

As I mentioned, in the last years TCPM has been extremely open to TCP-related needs in other working groups and we have quite successful cross-area work. 

Michael


> -----Original Message-----
> From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
> Sent: Tuesday, March 26, 2019 3:19 PM
> To: Scharf, Michael <Michael.Scharf@hs-esslingen.de>
> Cc: Mahesh Jethanandani <mjethanandani@gmail.com>om>; Netconf
> <netconf@ietf.org>rg>; tcpm@ietf.org
> Subject: Re: [netconf] Adoption poll for tcp-client-server and http-client-
> server draft
> 
> Dear Michael,
> 
> please note that a configuration model for NETCONF is on the NETCONF
> charter for ~5 years. To establish NETCONF session, we obviously need
> to establish TCP connections. This is what this work does. It is
> entirely orthogonal to draft-scharf-tcpm-yang-tcp, which talks about
> TCP protocol engine internals. If the TCPM chair has an issue with a
> generic solution to establish TCP connection not being done in TCPM,
> we should perhaps just hardcode how to establish TCP connections for
> NETCONF and RESTCONF and call it the day and then TCPM can pick up the
> pieces and start work on a generic solution.
> 
> /js
> 
> On Tue, Mar 26, 2019 at 01:02:49PM +0000, Scharf, Michael wrote:
> > Hi Mahesh,
> >
> > As chair of the TCPM working group, I believe that the document draft-
> kwatsen-netconf-tcp-client-server-00 belongs into the TCPM working group.
> The document is about a generic YANG model for an interface for TCP "for an
> SSH, TLS, or HTTP based application". I fail to see a reason why such a generic
> TCP model should be done in NETCONF.
> >
> > Thus, as a chair of TCPM, I object to adoption in NETCONF.
> >
> > I also want to note that it would have been possible to send a note to the
> TCPM list prior to starting an adoption call, as the TCPM list is monitored by
> many TCP implementers who could be affected by such a YANG model.
> YANG models can be used in different use cases. TCPM has a tradition of
> being very open to presentations from other working groups if they relate to
> TCP. I have added the TCPM list in CC.
> >
> > As an individual contributor to the IETF, I happen to be an author of draft-
> scharf-tcpm-yang-tcp, which actually was submitted last year. Given that
> different working groups seem to be involved, I believe that it would make
> sense to join efforts. Shouldn't we have a chat on the best next steps?
> >
> > Thanks
> >
> > Michael
> >
> >
> > > -----Original Message-----
> > > From: netconf <netconf-bounces@ietf.org> On Behalf Of Mahesh
> > > Jethanandani
> > > Sent: Tuesday, March 26, 2019 12:17 PM
> > > To: Netconf <netconf@ietf.org>
> > > Subject: [netconf] Adoption poll for tcp-client-server and http-client-
> server
> > > draft
> > >
> > > This is the start of a two week poll for WG adoption of the two drafts:
> > >
> > > https://tools.ietf.org/html/draft-kwatsen-netconf-tcp-client-server-00
> > > https://tools.ietf.org/html/draft-kwatsen-netconf-http-client-server-00
> > >
> > > Please indicate your support for or any objections you might have for
> > > adopting the two drafts as WG items by April 9.
> > >
> > > Mahesh Jethanandani
> > > mjethanandani@gmail.com
> > >
> > >
> > >
> > > _______________________________________________
> > > netconf mailing list
> > > netconf@ietf.org
> > > https://www.ietf.org/mailman/listinfo/netconf
> >
> > _______________________________________________
> > netconf mailing list
> > netconf@ietf.org
> > https://www.ietf.org/mailman/listinfo/netconf
> 
> --
> Juergen Schoenwaelder           Jacobs University Bremen gGmbH
> Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
> Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>