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Re: [Netmod-ver-dt] Version selection for NETCONF

"Joe Clarke (jclarke)" <jclarke@cisco.com> Thu, 19 September 2019 19:47 UTC

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From: "Joe Clarke (jclarke)" <jclarke@cisco.com>
To: "Reshad Rahman (rrahman)" <rrahman@cisco.com>
CC: "netmod-ver-dt@ietf.org" <netmod-ver-dt@ietf.org>
Thread-Topic: [Netmod-ver-dt] Version selection for NETCONF
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Date: Thu, 19 Sep 2019 19:46:55 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod-ver-dt/GJ_boIKO4gj-WPz9wAz_-9SNrlc>
Subject: Re: [Netmod-ver-dt] Version selection for NETCONF
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Why not advertise in yang library since both RC and NC need this?  Other than that, the RPC flow sounds right.  But what is the default schema?  Does the server flag one as default?

Joe

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On Sep 18, 2019, at 21:30, Reshad Rahman (rrahman) <rrahman@cisco.com<mailto:rrahman@cisco.com>> wrote:

Hi all,

Last week (email + meeting) there seemed to be consensus on the use of “root path” method for RESTCONF.

For NETCONF, we discussed using capabilities. Extending the capabilities to include “schema versions” seems sensible, with 1 top-level schema per schema family where family is e.g. vendor-xxx-native, ietf, OpenConfig.

  1.  An example of schema-versions advertised: vendor-xxx-native_1.2.1, vendor-xxx-native_2.0.0, ietf_2.3.0. We also need an RPC for the client to select which schema-version (among the ones advertised by the server) it wants to use.
  2.  If a client doesn’t call the SetVersion RPC, then the server’s behavior is to resort to default schema version (when multiple versions of schemas are supported).
  3.  If a server doesn’t advertise any schema-versions, client doesn’t call SetVersion RPC and both behave as they do today.

Thoughts on this?

Regards,
Reshad.

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