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draft-ietf-netconf-yang-notifications-versioning-06.xml
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<?xml version="1.0" encoding="US-ASCII"?>
<!DOCTYPE rfc SYSTEM "rfc2629.dtd">
<?rfc toc="yes"?>
<?rfc tocompact="yes"?>
<?rfc tocdepth="2"?>
<?rfc tocindent="yes"?>
<?rfc symrefs="yes"?>
<?rfc sortrefs="yes"?>
<?rfc comments="yes"?>
<?rfc inline="yes"?>
<?rfc compact="yes"?>
<?rfc subcompact="no"?>
<rfc category="std"
docName="draft-ietf-netconf-yang-notifications-versioning-06"
ipr="trust200902">
<front>
<title abbrev="YANG Notifications Versioning">Support of Versioning in
YANG Notifications Subscription</title>
<author fullname="Thomas Graf" initials="T" surname="Graf">
<organization>Swisscom</organization>
<address>
<postal>
<street>Binzring 17</street>
<city>Zurich</city>
<code>8045</code>
<country>Switzerland</country>
</postal>
<email>[email protected]</email>
</address>
</author>
<author fullname="Benoit Claise" initials="B" surname="Claise">
<organization>Huawei</organization>
<address>
<email>[email protected]</email>
</address>
</author>
<author fullname="Alex Huang Feng" initials="A." surname="Huang Feng">
<organization>INSA-Lyon</organization>
<address>
<postal>
<street/>
<city>Lyon</city>
<region/>
<code/>
<country>France</country>
</postal>
<phone/>
<facsimile/>
<email>[email protected]</email>
<uri/>
</address>
</author>
<date day="12" month="December" year="2024"/>
<abstract>
<t>This document extends the YANG notifications subscription mechanism
to specify the YANG module semantic version at the subscription. Then, a
new extension with the revision and the semantic version of the YANG
push subscription state change notification is proposed.</t>
</abstract>
<note title="Requirements Language">
<t>The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP 14
<xref target="RFC2119"/> <xref target="RFC8174"/> when, and only when,
they appear in all capitals, as shown here.</t>
</note>
</front>
<middle>
<section anchor="Introduction" title="Introduction">
<t>In order to process the newly received YANG push notification
messages described in section 3.7 of <xref target="RFC8641"/> without
querying the Publisher IETF-YANG-LIBRARY each time to understand whether
the YANG module(s) semantic has changed at the YANG push receiver, a
semantic reference to the YANG module and the XPath or subtree is needed
to determine the data types for each field and which part of the YANG
module the metrics are expose from.</t>
<t>This specification applies to the YANG push configured subscriptions
defined in Section 2.5 of <xref target="RFC8639"/>, where a publisher is
configured to stream notification out of band, as opposed to dynamic
subscriptions defined in Section 2.4 of <xref target="RFC8639"/>, where
the subscriber can initiate and modify the subscription dynamically
in-band. In the latter case, the subscriber knows already all the
subscriber YANG-related information, which it has to know in order to
configure the subscription.</t>
<t>This semantic reference is available when the subscription is
established as described in Section 3.6 of <xref target="RFC8641"/> and
being streamed from the publisher to receiver with the subscription
state change notifications described in Section 2.7 of <xref
target="RFC8639"/> where for each subscription a locally unique
subscription ID described in Section 4.3.2 of <xref target="RFC8641"/>
is being issued and streamed as metadata with the notification message
in the YANG push message header.</t>
<t>The semantics can change between different YANG module revisions. The
YANG module version statement is specified in Section 7.1.2 of <xref
target="RFC6020"/> and states that the newer revision needs to be
backward compatible to the previous revision. Section 3.1 of <xref
target="I-D.ietf-netmod-yang-module-versioning"/> specifies that newer
semantic versions introduced in <xref
target="I-D.ietf-netmod-yang-semver"/> MAY not be backward compatible to
the previous version when indicated with non-backwards-compatible
keyword.</t>
<t>The YANG notifications subscription mechanism defined in <xref
target="RFC8641"/> does not allow to specify the YANG module revision.
When a network node is upgraded, the subscribed YANG module revision MAY
have updated and might, consequently, break the data processing pipeline
since the YANG push receiver may not be aware of this change.</t>
<t>This documents extends the current YANG notifications subscription
mechanism to allow to subscribe to a specific revision or latest YANG
module semantic version to which the YANG module version needs to be
backward compatible to. The subscription state change
"subscription-started" and "subscription-modified" notification messages
are also extended to include the revision and semantic version.</t>
</section>
<section anchor="Datastore-Selection"
title="Extend the Datastore Selection">
<t>The YANG notifications subscription OPTIONALLY can be restricted to
the following YANG module revision for future capabilities:</t>
<dl>
<dt>module:</dt>
<dd>Restricts the subscription to one or more YANG module names with
revision and revision-label together for the related streamed
content.</dd>
</dl>
<dl>
<dt>revision:</dt>
<dd>Restricts the subscription to a specific YANG module revision.
Example: "2014-05-08".</dd>
</dl>
<dl>
<dt>revision-label:</dt>
<dd>Restricts the subscription to the latest compatible YANG module
semantic version referenced to. Example: "2.0.0".</dd>
</dl>
<t>When the NETCONF client creates or modifies the subscription using
the RPCs establish-subscription and modify-subscription and the NETCONF
server does not support the revision, the revision-label or the
combination of revision and revision-label specified in the RPC request,
the NETCONF server MUST return an RPC reply including an
<rpc-error> element as defined in Section 4.3 of <xref
target="RFC6241"/> with the error information populated as follows:</t>
<ul bare="false" empty="false" spacing="normal">
<li>an "error-type" node of "application".</li>
<li>an "error-tag" node whose value is a string that corresponds to an
identity associated with the error.</li>
</ul>
<table align="center" anchor="gen-sub-errors">
<name slugifiedName="name-general-subscription-error-">General
Subscription Error Identities and Associated "error-tag" Use</name>
<thead>
<tr>
<th align="left" colspan="1" rowspan="1">Error identity</th>
<th align="left" colspan="1" rowspan="1">Uses "error-tag"</th>
</tr>
</thead>
<tbody>
<tr>
<td align="left" colspan="1" rowspan="1">revision-unsupported</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
<tr>
<td align="left" colspan="1"
rowspan="1">revision-label-unsupported</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
<tr>
<td align="left" colspan="1"
rowspan="1">incompatible-revision-and-revision-label</td>
<td align="left" colspan="1" rowspan="1">invalid-value</td>
</tr>
</tbody>
</table>
<t><xref target="subscription_establish_sub_example_xml_fig"/> provides
an example of a "establish-subscription" RPC call with YANG revision and
datastore-xpath-filter for periodical subscription. <xref
target="subscription_establish_sub_positive_response_example_xml_fig"/>
shows the response when the RPC has been accepted by the NETCONF server
and <xref
target="subscription_establish_sub_error_response_example_xml_fig"/> the
error sent by the NETCONF server when the revision is not supported.</t>
<figure anchor="subscription_establish_sub_example_xml_fig"
title="RPC Example for an establish-subscription">
<artwork><![CDATA[
<netconf:rpc message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<establish-subscription
xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications"
xmlns:yp="urn:ietf:params:xml:ns:yang:ietf-yang-push">
xmlns:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<yp:datastore
xmlns:ds="urn:ietf:params:xml:ns:yang:ietf-datastores">
ds:operational
</yp:datastore>
<yp:datastore-xpath-filter
xmlns:ex="https://example.com/sample-data/1.0">
/ex:foo
</yp:datastore-xpath-filter>
<ypr:module-version>
<ypr:module-name>ex:foo</ypr:module-name>
<ypr:revision>2023-09-17</ypr:revision>
</ypr:module-version>
<yp:periodic>
<yp:period>500</yp:period>
</yp:periodic>
</establish-subscription>
</netconf:rpc>
]]></artwork>
</figure>
<figure anchor="subscription_establish_sub_positive_response_example_xml_fig"
title="RPC Example for a positive establish-subscription response">
<artwork><![CDATA[
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<id
xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
52
</id>
</rpc-reply>
]]></artwork>
</figure>
<figure anchor="subscription_establish_sub_error_response_example_xml_fig"
title="RPC Example for an error establish-subscription response">
<artwork><![CDATA[
<rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"
xmlns:yp="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
<rpc-error>
<error-type>application</error-type>
<error-tag>operation-failed</error-tag>
<error-severity>error</error-severity>
<error-path xmlns:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<error-info>
<yp:establish-subscription-error-datastore>
<yp:reason xmlns:ypr="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
ypr:revision-unsupported
</yp:reason>
</yp:establish-subscription-error-datastore>
</error-info>
</rpc-error>
</rpc-reply>
]]></artwork>
</figure>
</section>
<section anchor="Streaming-Update"
title="Extend the Subscription State Change Notifications">
<t>Besides the Subscription ID and the xpath or sub-tree filter
reference as described in Section 2.7 of <xref target="RFC8639"/>, the
following metadata objects are part of a "subscription-started" or
"subscription-modified" subscription state change notification.</t>
<dl>
<dt>module:</dt>
<dd>Describes the YANG module names for the related streamed
content.</dd>
</dl>
<dl>
<dt>revision:</dt>
<dd>Describes the YANG module revision as specified in Section 7.1.9
of <xref target="RFC6020"/> for the related streamed content.</dd>
</dl>
<dl>
<dt>revision-label:</dt>
<dd>Describes the YANG module semantic version as specified in <xref
target="I-D.ietf-netmod-yang-semver"/> for the related streamed
content.</dd>
</dl>
<t><xref target="subscription_modified_notif_example_xml_fig"/> provides
an example of a "subscription-modified" subscription state change
notification message with the YANG module name, revision, revision label
and datastore-xpath-filter for tracking the operational status of a
single Ethernet interface (per <xref target="RFC8343"/>). This
subscription state change notification message is encoded XML <xref
target="W3C.REC-xml-20081126"/> over the Network Configuration Protocol
(NETCONF) as per <xref target="RFC8640"/>.</t>
<figure anchor="subscription_modified_notif_example_xml_fig"
title="XML Push Example for a subscription-modified notification message">
<artwork><![CDATA[
<notification xmlns="urn:ietf:params:xml:ns:netconf:notification:1.0">
<eventTime>2023-01-03T10:00:00Z</eventTime>
<subscription-modified
xmlns="urn:ietf:params:xml:ns:yang:ietf-subscribed-notifications">
<id>101</id>
<stream-xpath-filter
xmlns:int="urn:ietf:params:xml:ns:yang:ietf-interfaces">
/int:interfaces
</stream-xpath-filter>
<stream>NETCONF</stream>
<module-version
xmlns="urn:ietf:params:xml:ns:yang:ietf-yang-push-revision">
<module-name>ietf-interfaces</module-name>
<revision>2018-02-20</revision>
<revision-label>2.0.0</revision-label>
</module-version>
</subscription-modified>
</notification>
]]></artwork>
</figure>
<t><xref target="subscription_modified_notif_example_json_fig"/>
provides an example of a JSON encoded, <xref target="RFC8259"/>,
subscription state change notification message over HTTPS-based <xref
target="I-D.ietf-netconf-https-notif"/> or UDP-based <xref
target="I-D.ietf-netconf-udp-notif"/> transport for the same
subscription.</t>
<figure anchor="subscription_modified_notif_example_json_fig"
title="JSON Push Example for a subscription-modified notification message">
<artwork><![CDATA[
{
"ietf-restconf:notification" : {
"eventTime": "2023-01-03T10:00:00Z",
"ietf-subscribed-notifications:subscription-modified": {
"id": 101,
"stream-xpath-filter": "/ietf-interfaces:interfaces",
"stream": "NETCONF",
"ietf-yang-push-revision:module-version": [{
"module-name": "ietf-interfaces"
"revision": "2018-02-20",
"revision-label": "2.0.0",
}],
}
}
}
]]></artwork>
</figure>
</section>
<section anchor="YANG-push-revision-module"
title="The "ietf-yang-push-revision" Module">
<section anchor="YANG-revision-model" title="Data Model Overview">
<t>This YANG module augments the "ietf-yang-push" module with the
module-name, revision and revision-label in the "subscription-started"
and "subscription-modified" subscription state change notifications
and the ability to define the "revision" and "revision-label" in the
"establish-subscription" and "modify-subscription" RPCs in the
datastore push subscription.</t>
<section anchor="Tree View" title="Tree View">
<t>The following is the YANG tree diagram <xref target="RFC8340"/>
for the ietf-yang-push-revision YANG module</t>
<t><figure>
<artwork><![CDATA[
module: ietf-yang-push-revision
augment /sn:establish-subscription/sn:input:
+---w module-version-config* [module-name]
{yang-push-revision-supported}?
+---w module-name yang:yang-identifier
+---w revision? rev:revision-date
+---w revision-label? ysver:version
augment /sn:modify-subscription/sn:input:
+---w module-version-config* [module-name]
{yang-push-revision-supported}?
+---w module-name yang:yang-identifier
+---w revision? rev:revision-date
+---w revision-label? ysver:version
augment /sn:subscription-started:
+--ro module-version* [module-name]
{yang-push-revision-supported}?
+--ro module-name yang:yang-identifier
+--ro revision rev:revision-date
+--ro revision-label? ysver:version
augment /sn:subscription-modified:
+--ro module-version* [module-name]
{yang-push-revision-supported}?
+--ro module-name yang:yang-identifier
+--ro revision rev:revision-date
+--ro revision-label? ysver:version
augment /sn:subscriptions/sn:subscription:
+--rw module-version-config* [module-name]
{yang-push-revision-supported}?
+--rw module-name yang:yang-identifier
+--rw revision? rev:revision-date
+--rw revision-label? ysver:version
]]></artwork>
</figure></t>
</section>
<section anchor="Full Tree View" title="Full Tree View">
<t>The following is the YANG tree diagram <xref target="RFC8340"/>
for the ietf-yang-push-revision augmentation within the
ietf-subscribed-notifications, including the RPCs and
notifications.</t>
<t><figure>
<artwork><![CDATA[
module: ietf-yang-push
rpcs:
+---x resync-subscription {on-change}?
+---w input
+---w id sn:subscription-id
notifications:
+---n push-update
| +--ro id? sn:subscription-id
| +--ro datastore-contents? <anydata>
| +--ro incomplete-update? empty
+---n push-change-update {on-change}?
+--ro id? sn:subscription-id
+--ro datastore-changes
| +--ro yang-patch
| +--ro patch-id string
| +--ro comment? string
| +--ro edit* [edit-id]
| +--ro edit-id string
| +--ro operation enumeration
| +--ro target target-resource-offset
| +--ro point? target-resource-offset
| +--ro where? enumeration
| +--ro value? <anydata>
+--ro incomplete-update? empty
module: ietf-subscribed-notifications
+--ro streams
| +--ro stream* [name]
| +--ro name string
| +--ro description? string
| +--ro replay-support? empty {replay}?
| +--ro replay-log-creation-time yang:date-and-time {replay}?
| +--ro replay-log-aged-time? yang:date-and-time {replay}?
+--rw filters
| +--rw stream-filter* [name]
| | +--rw name string
| | +--rw (filter-spec)?
| | +--:(stream-subtree-filter)
| | | +--rw stream-subtree-filter? <anydata> {subtree}?
| | +--:(stream-xpath-filter)
| | +--rw stream-xpath-filter? yang:xpath1.0 {xpath}?
| +--rw yp:selection-filter* [filter-id]
| +--rw yp:filter-id string
| +--rw (yp:filter-spec)?
| +--:(yp:datastore-subtree-filter)
| | +--rw yp:datastore-subtree-filter? <anydata>
| | {sn:subtree}?
| +--:(yp:datastore-xpath-filter)
| +--rw yp:datastore-xpath-filter? yang:xpath1.0
| {sn:xpath}?
+--rw subscriptions
+--rw subscription* [id]
+--rw id
| subscription-id
+--rw (target)
| +--:(stream)
| | +--rw (stream-filter)?
| | | +--:(by-reference)
| | | | +--rw stream-filter-name
| | | | stream-filter-ref
| | | +--:(within-subscription)
| | | +--rw (filter-spec)?
| | | +--:(stream-subtree-filter)
| | | | +--rw stream-subtree-filter?
| | | | <anydata> {subtree}?
| | | +--:(stream-xpath-filter)
| | | +--rw stream-xpath-filter?
| | | yang:xpath1.0 {xpath}?
| | +--rw stream
| | | stream-ref
| | +--ro replay-start-time?
| | | yang:date-and-time {replay}?
| | +--rw configured-replay? empty
| | {configured,replay}?
| +--:(yp:datastore)
| +--rw yp:datastore
| | identityref
| +--rw (yp:selection-filter)?
| +--:(yp:by-reference)
| | +--rw yp:selection-filter-ref
| | selection-filter-ref
| +--:(yp:within-subscription)
| +--rw (yp:filter-spec)?
| +--:(yp:datastore-subtree-filter)
| | +--rw yp:datastore-subtree-filter?
| | <anydata> {sn:subtree}?
| +--:(yp:datastore-xpath-filter)
| +--rw yp:datastore-xpath-filter?
| yang:xpath1.0 {sn:xpath}?
+--rw stop-time?
| yang:date-and-time
+--rw dscp?
| inet:dscp {dscp}?
+--rw weighting? uint8
| {qos}?
+--rw dependency?
| subscription-id {qos}?
+--rw transport?
| transport {configured}?
+--rw encoding?
| encoding
+--rw purpose? string
| {configured}?
+--rw (notification-message-origin)? {configured}?
| +--:(interface-originated)
| | +--rw source-interface?
| | if:interface-ref {interface-designation}?
| +--:(address-originated)
| +--rw source-vrf?
| | -> /ni:network-instances/network-instance/name
| | {supports-vrf}?
| +--rw source-address?
| inet:ip-address-no-zone
+--ro configured-subscription-state?
| enumeration {configured}?
+--rw receivers
| +--rw receiver* [name]
| +--rw name string
| +--ro sent-event-records?
| | yang:zero-based-counter64
| +--ro excluded-event-records?
| | yang:zero-based-counter64
| +--ro state enumeration
| +---x reset {configured}?
| +--ro output
| +--ro time yang:date-and-time
+--rw ypr:module-version-config* [module-name]
| {yang-push-revision-supported}?
| +--rw ypr:module-name yang:yang-identifier
| +--rw ypr:revision? rev:revision-date
| +--rw ypr:revision-label? ysver:version
+--rw (yp:update-trigger)?
+--:(yp:periodic)
| +--rw yp:periodic!
| +--rw yp:period centiseconds
| +--rw yp:anchor-time? yang:date-and-time
+--:(yp:on-change) {on-change}?
+--rw yp:on-change!
+--rw yp:dampening-period? centiseconds
+--rw yp:sync-on-start? boolean
+--rw yp:excluded-change* change-type
rpcs:
+---x establish-subscription
| +---w input
| | +---w (target)
| | | +--:(stream)
| | | | +---w (stream-filter)?
| | | | | +--:(by-reference)
| | | | | | +---w stream-filter-name
| | | | | | stream-filter-ref
| | | | | +--:(within-subscription)
| | | | | +---w (filter-spec)?
| | | | | +--:(stream-subtree-filter)
| | | | | | +---w stream-subtree-filter?
| | | | | | <anydata> {subtree}?
| | | | | +--:(stream-xpath-filter)
| | | | | +---w stream-xpath-filter?
| | | | | yang:xpath1.0 {xpath}?
| | | | +---w stream
| | | | | stream-ref
| | | | +---w replay-start-time?
| | | | yang:date-and-time {replay}?
| | | +--:(yp:datastore)
| | | +---w yp:datastore
| | | | identityref
| | | +---w (yp:selection-filter)?
| | | +--:(yp:by-reference)
| | | | +---w yp:selection-filter-ref
| | | | selection-filter-ref
| | | +--:(yp:within-subscription)
| | | +---w (yp:filter-spec)?
| | | +--:(yp:datastore-subtree-filter)
| | | | +---w yp:datastore-subtree-filter?
| | | | <anydata> {sn:subtree}?
| | | +--:(yp:datastore-xpath-filter)
| | | +---w yp:datastore-xpath-filter?
| | | yang:xpath1.0 {sn:xpath}?
| | +---w stop-time?
| | | yang:date-and-time
| | +---w dscp?
| | | inet:dscp {dscp}?
| | +---w weighting? uint8
| | | {qos}?
| | +---w dependency?
| | | subscription-id {qos}?
| | +---w encoding?
| | | encoding
| | +---w ypr:module-version-config* [module-name]
| | | {yang-push-revision-supported}?
| | | +---w ypr:module-name yang:yang-identifier
| | | +---w ypr:revision? rev:revision-date
| | | +---w ypr:revision-label? ysver:version
| | +---w (yp:update-trigger)?
| | +--:(yp:periodic)
| | | +---w yp:periodic!
| | | +---w yp:period centiseconds
| | | +---w yp:anchor-time? yang:date-and-time
| | +--:(yp:on-change) {on-change}?
| | +---w yp:on-change!
| | +---w yp:dampening-period? centiseconds
| | +---w yp:sync-on-start? boolean
| | +---w yp:excluded-change* change-type
| +--ro output
| +--ro id subscription-id
| +--ro replay-start-time-revision? yang:date-and-time
| {replay}?
+---x modify-subscription
| +---w input
| +---w id
| | subscription-id
| +---w (target)
| | +--:(stream)
| | | +---w (stream-filter)?
| | | +--:(by-reference)
| | | | +---w stream-filter-name
| | | | stream-filter-ref
| | | +--:(within-subscription)
| | | +---w (filter-spec)?
| | | +--:(stream-subtree-filter)
| | | | +---w stream-subtree-filter?
| | | | <anydata> {subtree}?
| | | +--:(stream-xpath-filter)
| | | +---w stream-xpath-filter?
| | | yang:xpath1.0 {xpath}?
| | +--:(yp:datastore)
| | +---w yp:datastore
| | | identityref
| | +---w (yp:selection-filter)?
| | +--:(yp:by-reference)
| | | +---w yp:selection-filter-ref
| | | selection-filter-ref
| | +--:(yp:within-subscription)
| | +---w (yp:filter-spec)?
| | +--:(yp:datastore-subtree-filter)
| | | +---w yp:datastore-subtree-filter?
| | | <anydata> {sn:subtree}?
| | +--:(yp:datastore-xpath-filter)
| | +---w yp:datastore-xpath-filter?
| | yang:xpath1.0 {sn:xpath}?
| +---w stop-time?
| | yang:date-and-time
| +---w ypr:module-version-config* [module-name]
| | {yang-push-revision-supported}?
| | +---w ypr:module-name yang:yang-identifier
| | +---w ypr:revision? rev:revision-date
| | +---w ypr:revision-label? ysver:version
| +---w (yp:update-trigger)?
| +--:(yp:periodic)
| | +---w yp:periodic!
| | +---w yp:period centiseconds
| | +---w yp:anchor-time? yang:date-and-time
| +--:(yp:on-change) {on-change}?
| +---w yp:on-change!
| +---w yp:dampening-period? centiseconds
+---x delete-subscription
| +---w input
| +---w id subscription-id
+---x kill-subscription
+---w input
+---w id subscription-id
notifications:
+---n replay-completed {replay}?
| +--ro id subscription-id
+---n subscription-completed {configured}?
| +--ro id subscription-id
+---n subscription-modified
| +--ro id
| | subscription-id
| +--ro (target)
| | +--:(stream)
| | | +--ro (stream-filter)?
| | | | +--:(by-reference)
| | | | | +--ro stream-filter-name
| | | | | stream-filter-ref
| | | | +--:(within-subscription)
| | | | +--ro (filter-spec)?
| | | | +--:(stream-subtree-filter)
| | | | | +--ro stream-subtree-filter?
| | | | | <anydata> {subtree}?
| | | | +--:(stream-xpath-filter)
| | | | +--ro stream-xpath-filter?
| | | | yang:xpath1.0 {xpath}?
| | | +--ro stream
| | | | stream-ref
| | | +--ro replay-start-time?
| | | yang:date-and-time {replay}?
| | +--:(yp:datastore)
| | +--ro yp:datastore
| | | identityref
| | +--ro (yp:selection-filter)?
| | +--:(yp:by-reference)
| | | +--ro yp:selection-filter-ref
| | | selection-filter-ref
| | +--:(yp:within-subscription)
| | +--ro (yp:filter-spec)?
| | +--:(yp:datastore-subtree-filter)
| | | +--ro yp:datastore-subtree-filter?
| | | <anydata> {sn:subtree}?
| | +--:(yp:datastore-xpath-filter)
| | +--ro yp:datastore-xpath-filter?
| | yang:xpath1.0 {sn:xpath}?
| +--ro stop-time?
| | yang:date-and-time
| +--ro dscp?
| | inet:dscp {dscp}?
| +--ro weighting? uint8
| | {qos}?
| +--ro dependency?
| | subscription-id {qos}?
| +--ro transport?
| | transport {configured}?
| +--ro encoding? encoding
| +--ro purpose? string
| | {configured}?
| +--ro ypr:module-version* [module-name]
| | {yang-push-revision-supported}?
| | +--ro ypr:module-name yang:yang-identifier
| | +--ro ypr:revision rev:revision-date
| | +--ro ypr:revision-label? ysver:version
| +--ro (yp:update-trigger)?
| +--:(yp:periodic)
| | +--ro yp:periodic!
| | +--ro yp:period centiseconds
| | +--ro yp:anchor-time? yang:date-and-time
| +--:(yp:on-change) {on-change}?
| +--ro yp:on-change!
| +--ro yp:dampening-period? centiseconds
| +--ro yp:sync-on-start? boolean
| +--ro yp:excluded-change* change-type
+---n subscription-resumed
| +--ro id subscription-id
+---n subscription-started {configured}?
| +--ro id
| | subscription-id
| +--ro (target)
| | +--:(stream)
| | | +--ro (stream-filter)?
| | | | +--:(by-reference)
| | | | | +--ro stream-filter-name
| | | | | stream-filter-ref
| | | | +--:(within-subscription)
| | | | +--ro (filter-spec)?
| | | | +--:(stream-subtree-filter)
| | | | | +--ro stream-subtree-filter?
| | | | | <anydata> {subtree}?
| | | | +--:(stream-xpath-filter)
| | | | +--ro stream-xpath-filter?
| | | | yang:xpath1.0 {xpath}?
| | | +--ro stream
| | | | stream-ref
| | | +--ro replay-start-time?
| | | | yang:date-and-time {replay}?
| | | +--ro replay-previous-event-time?
| | | yang:date-and-time {replay}?
| | +--:(yp:datastore)
| | +--ro yp:datastore
| | | identityref
| | +--ro (yp:selection-filter)?
| | +--:(yp:by-reference)
| | | +--ro yp:selection-filter-ref
| | | selection-filter-ref
| | +--:(yp:within-subscription)
| | +--ro (yp:filter-spec)?
| | +--:(yp:datastore-subtree-filter)
| | | +--ro yp:datastore-subtree-filter?
| | | <anydata> {sn:subtree}?
| | +--:(yp:datastore-xpath-filter)
| | +--ro yp:datastore-xpath-filter?
| | yang:xpath1.0 {sn:xpath}?
| +--ro stop-time?
| | yang:date-and-time
| +--ro dscp?
| | inet:dscp {dscp}?
| +--ro weighting? uint8
| | {qos}?
| +--ro dependency?
| | subscription-id {qos}?
| +--ro transport?
| | transport {configured}?
| +--ro encoding? encoding
| +--ro purpose? string
| | {configured}?
| +--ro ypr:module-version* [module-name]
| | {yang-push-revision-supported}?
| | +--ro ypr:module-name yang:yang-identifier
| | +--ro ypr:revision rev:revision-date
| | +--ro ypr:revision-label? ysver:version
| +--ro (yp:update-trigger)?
| +--:(yp:periodic)
| | +--ro yp:periodic!
| | +--ro yp:period centiseconds
| | +--ro yp:anchor-time? yang:date-and-time
| +--:(yp:on-change) {on-change}?
| +--ro yp:on-change!
| +--ro yp:dampening-period? centiseconds
| +--ro yp:sync-on-start? boolean
| +--ro yp:excluded-change* change-type
+---n subscription-suspended
| +--ro id subscription-id
| +--ro reason identityref
+---n subscription-terminated
+--ro id subscription-id
+--ro reason identityref
]]></artwork>
</figure></t>
</section>
</section>
<section anchor="YANG-revision-module" title="YANG Module">
<t>The YANG module has two leaves augmenting the model of <xref
target="RFC8639">Subscription to YANG Notifications</xref>.</t>
<t><figure>
<artwork><![CDATA[
<CODE BEGINS> file "[email protected]"
module ietf-yang-push-revision {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-yang-push-revision";
prefix ypr;
import ietf-subscribed-notifications {
prefix sn;
reference
"RFC 8639: Subscription to YANG Notifications";
}
import ietf-yang-revisions {
prefix rev;
reference
"RFC YYYY: draft-ietf-netmod-yang-module-versioning-11,
Updated YANG Module Revision Handling";
}
import ietf-yang-types {
prefix yang;
rev:recommended-min-date "2013-07-15";
reference
"RFC 6991: Common YANG Data Types.";
}
import ietf-yang-semver {
prefix ysver;
reference
"RFC ZZZZ: draft-ietf-netmod-yang-semver-15, YANG Semantic
Versioning";
}
organization "IETF NETCONF (Network Configuration) Working Group";
contact
"WG Web: <http:/tools.ietf.org/wg/netconf/>
WG List: <mailto:[email protected]>
Authors: Thomas Graf
<mailto:[email protected]>
Benoit Claise
<mailto:[email protected]>
Alex Huang Feng
<mailto:[email protected]>";
description
"Defines YANG push event notification header with the revision and
the revision-label. Adds the support of the revision and
revision-label selection in the YANG push subscription RPCs.
Copyright (c) 2023 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, is permitted pursuant to, and subject to the license
terms contained in, the Revised BSD License set forth in Section
4.c of the IETF Trust's Legal Provisions Relating to IETF Documents
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the RFC
itself for full legal notices.";
revision 2024-06-16 {
description
"First revision";
reference
"RFC XXXX: Support of Versioning in YANG Notifications
Subscription";
}
feature yang-push-revision-supported {
description
"This feature indicates the YANG Subscription Notifications
supports specifying the list of modules, revisions and
revision-label in the YANG subscription.";
}
// Identities
identity revision-unsupported {
base sn:establish-subscription-error;
base sn:modify-subscription-error;
description
"Revision not supported. This failure can be due to subscribing
to a specific revision not supported by the publisher.";
}
identity revision-label-unsupported {
base sn:establish-subscription-error;
base sn:modify-subscription-error;
description
"Revision-label not supported. This failure can be due to
subscribing to a specific revision-label not supported by the publisher.";
}
identity incompatible-revision-and-revision-label {
base sn:establish-subscription-error;
base sn:modify-subscription-error;
description
"The combination of revision and the revision-label are
incompatible. This failure happens when the revision and the
revision-label are both specified in the RPC and the YANG
module supported by the publisher does not support one of the
revision or the revision-label.";
}
grouping yang-push-module-version-config {
description
"This grouping combines the module name, the revision and
revision-label leaves. This grouping is to be used for
configuration and the leaves are not mandatory.";
leaf module-name {
type yang:yang-identifier;
description
"This references the YANG module name.";
}
leaf revision {
type rev:revision-date;
description
"This references the YANG module revision to be sent in the
subscription.";
}
leaf revision-label {
type ysver:version;
description
"This references the YANG module semantic version to be sent in the
subscription.";
}
}
grouping yang-push-module-version {
description
"This grouping combines the module name, the revision and
revision-label leaves. This grouping is to be used for
read-only cases such as the content of YANG push Notifications.
The module-name and revision are mandatory and MUST be present
in the data.";
leaf module-name {
type yang:yang-identifier;
config false;
mandatory true;
description