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NETCONF Events: Pre-release 3

Hi

Attached is the pre-release of version -09 of NETCONF notification
draft. I plan to submit by close of business my time today. Please send
any reports of typos, gating issues, etc ASAP.

Thanks,

Sharon Chisholm
Nortel 
Ottawa, Ontario
Canada
Title: Diff: draft-ietf-netconf-notification-08.txt - netconf_event_prerelease_3.txt
 draft-ietf-netconf-notification-08.txt   netconf_event_prerelease_3.txt 
Network Working Group S. Chisholm Network Working Group S. Chisholm
Internet-Draft Nortel Internet-Draft Nortel
Intended status: Standards Track H. Trevino Intended status: Standards Track H. Trevino
Expires: January 9, 2008 Cisco Expires: February 2, 2008 Cisco
July 8, 2007 August 2007
NETCONF Event Notifications NETCONF Event Notifications
draft-ietf-netconf-notification-08.txt.pre-release draft-ietf-netconf-notification-09.txt.prerelease
Status of this Memo Status of this Memo
By submitting this Internet-Draft, each author represents that any By submitting this Internet-Draft, each author represents that any
applicable patent or other IPR claims of which he or she is aware applicable patent or other IPR claims of which he or she is aware
have been or will be disclosed, and any of which he or she becomes have been or will be disclosed, and any of which he or she becomes
aware will be disclosed, in accordance with Section 6 of BCP 79. aware will be disclosed, in accordance with Section 6 of BCP 79.
Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF), its areas, and its working groups. Note that Task Force (IETF), its areas, and its working groups. Note that
skipping to change at page 1, line 35 skipping to change at page 1, line 35
and may be updated, replaced, or obsoleted by other documents at any and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress." material or to cite them other than as "work in progress."
The list of current Internet-Drafts can be accessed at The list of current Internet-Drafts can be accessed at
http://www.ietf.org/ietf/1id-abstracts.txt. http://www.ietf.org/ietf/1id-abstracts.txt.
The list of Internet-Draft Shadow Directories can be accessed at The list of Internet-Draft Shadow Directories can be accessed at
http://www.ietf.org/shadow.html. http://www.ietf.org/shadow.html.
This Internet-Draft will expire on January 9, 2008. This Internet-Draft will expire on February 2, 2008.
Copyright Notice Copyright Notice
Copyright (C) The IETF Trust (2007). Copyright (C) The IETF Trust (2007).
Abstract Abstract
This document defines mechanisms which provide an asynchronous This document defines mechanisms that provide an asynchronous message
message notification delivery service for the NETCONF protocol. This notification delivery service for the NETCONF protocol. This is an
is an optional capability built on top of the base NETCONF optional capability built on top of the base NETCONF definition.
definition. This document defines the capabilities and operations This document defines the capabilities and operations necessary to
necessary to support this service. support this service.
Table of Contents Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1. Definition of Terms . . . . . . . . . . . . . . . . . . . 4 1.1. Definition of Terms . . . . . . . . . . . . . . . . . . . 4
1.2. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 5 1.2. Motivation . . . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Event Notifications in NETCONF . . . . . . . . . . . . . . 5 1.3. Event Notifications in NETCONF . . . . . . . . . . . . . . 6
1.4. Requirements . . . . . . . . . . . . . . . . . . . . . . . 6
2. Notification-Related Operations . . . . . . . . . . . . . . . 7 2. Notification-Related Operations . . . . . . . . . . . . . . . 7
2.1. Subscribing to Receive Event Notifications . . . . . . . . 7 2.1. Subscribing to Receive Event Notifications . . . . . . . . 7
2.1.1. <create-subscription> . . . . . . . . . . . . . . . . 7 2.1.1. <create-subscription> . . . . . . . . . . . . . . . . 7
2.2. Sending Event Notifications . . . . . . . . . . . . . . . 9 2.2. Sending Event Notifications . . . . . . . . . . . . . . . 9
2.2.1. <notification> . . . . . . . . . . . . . . . . . . . . 9 2.2.1. <notification> . . . . . . . . . . . . . . . . . . . . 9
2.3. Terminating the Subscription . . . . . . . . . . . . . . . 10 2.3. Terminating the Subscription . . . . . . . . . . . . . . . 10
3. Supporting Concepts . . . . . . . . . . . . . . . . . . . . . 11 3. Supporting Concepts . . . . . . . . . . . . . . . . . . . . . 11
3.1. Capabilities Exchange . . . . . . . . . . . . . . . . . . 11 3.1. Capabilities Exchange . . . . . . . . . . . . . . . . . . 11
3.1.1. Capability Identifier . . . . . . . . . . . . . . . . 11 3.1.1. Capability Identifier . . . . . . . . . . . . . . . . 11
3.1.2. Capability Example . . . . . . . . . . . . . . . . . . 11 3.1.2. Capability Example . . . . . . . . . . . . . . . . . . 11
3.2. Event Streams . . . . . . . . . . . . . . . . . . . . . . 11 3.2. Event Streams . . . . . . . . . . . . . . . . . . . . . . 11
3.2.1. Event Stream Definition . . . . . . . . . . . . . . . 12 3.2.1. Event Stream Definition . . . . . . . . . . . . . . . 13
3.2.2. Event Stream Content Format . . . . . . . . . . . . . 13 3.2.2. Event Stream Content Format . . . . . . . . . . . . . 13
3.2.3. Default Event Stream . . . . . . . . . . . . . . . . . 13 3.2.3. Default Event Stream . . . . . . . . . . . . . . . . . 13
3.2.4. Event Stream Sources . . . . . . . . . . . . . . . . . 13 3.2.4. Event Stream Sources . . . . . . . . . . . . . . . . . 13
3.2.5. Event Stream Discovery . . . . . . . . . . . . . . . . 13 3.2.5. Event Stream Discovery . . . . . . . . . . . . . . . . 13
3.3. Notification Replay . . . . . . . . . . . . . . . . . . . 15 3.3. Notification Replay . . . . . . . . . . . . . . . . . . . 16
3.3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . 15 3.3.1. Overview . . . . . . . . . . . . . . . . . . . . . . . 16
3.3.2. Creating a Subscription with Replay . . . . . . . . . 16 3.3.2. Creating a Subscription with Replay . . . . . . . . . 17
3.3.3. Replay Complete Notification . . . . . . . . . . . . . 16 3.4. Notification Management Schema . . . . . . . . . . . . . . 17
3.4. Notification Management Schema . . . . . . . . . . . . . . 16 3.5. Subscriptions Data . . . . . . . . . . . . . . . . . . . . 21
3.5. Subscriptions Data . . . . . . . . . . . . . . . . . . . . 19 3.6. Filter Mechanics . . . . . . . . . . . . . . . . . . . . . 21
3.6. Filter Mechanics . . . . . . . . . . . . . . . . . . . . . 19 3.6.1. Filtering . . . . . . . . . . . . . . . . . . . . . . 21
3.6.1. Filtering . . . . . . . . . . . . . . . . . . . . . . 19 3.7. Message Flow . . . . . . . . . . . . . . . . . . . . . . . 21
3.7. Message Flow . . . . . . . . . . . . . . . . . . . . . . . 19 4. XML Schema for Event Notifications . . . . . . . . . . . . . . 24
4. XML Schema for Event Notifications . . . . . . . . . . . . . . 21 5. Filtering Examples . . . . . . . . . . . . . . . . . . . . . . 28
5. Filtering Examples . . . . . . . . . . . . . . . . . . . . . . 25 5.1. Subtree Filtering . . . . . . . . . . . . . . . . . . . . 32
5.1. Subtree Filtering . . . . . . . . . . . . . . . . . . . . 25 5.2. XPATH filters . . . . . . . . . . . . . . . . . . . . . . 33
5.2. XPATH filters . . . . . . . . . . . . . . . . . . . . . . 28 6. Security Considerations . . . . . . . . . . . . . . . . . . . 35
6. Security Considerations . . . . . . . . . . . . . . . . . . . 30 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 36
7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 31 8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 37
8. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . 32 9. Normative References . . . . . . . . . . . . . . . . . . . . . 38
9. Normative References . . . . . . . . . . . . . . . . . . . . . 33 Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 39
Appendix A. Change Log . . . . . . . . . . . . . . . . . . . . . 34 A.1. Version -08 . . . . . . . . . . . . . . . . . . . . . . . 39
A.1. Version -08 . . . . . . . . . . . . . . . . . . . . . . . 34 A.2. Version -09 . . . . . . . . . . . . . . . . . . . . . . . 41
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 37 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 44
Intellectual Property and Copyright Statements . . . . . . . . . . 38 Intellectual Property and Copyright Statements . . . . . . . . . . 45
1. Introduction 1. Introduction
[NETCONF] can be conceptually partitioned into four layers: [NETCONF] can be conceptually partitioned into four layers:
Layer Example Layer Example
+-------------+ +----------------------------------------+ +-------------+ +----------------------------------------+
| Content | | Configuration data | | Content | | Configuration data |
+-------------+ +----------------------------------------+ +-------------+ +----------------------------------------+
| | | |
skipping to change at page 4, line 45 skipping to change at page 4, line 45
1.1. Definition of Terms 1.1. Definition of Terms
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119]. document are to be interpreted as described in [RFC2119].
Element: An [XML] Element. Element: An [XML] Element.
Subscription: An agreement and method to receive event notifications Subscription: An agreement and method to receive event notifications
over a NETCONF session. A concept related to the delivery of over a NETCONF session. A concept related to the delivery of
notifications (if any to send) involving destination and selection notifications (if there are any to send) involving destination and
of notifications. It is bound to the lifetime of a session. selection of notifications. It is bound to the lifetime of a
session.
Operation: This term is used to refer to NETCONF protocol operations Operation: This term is used to refer to NETCONF protocol operations
[NETCONF]. Specifically within this document, operation refers to [NETCONF]. Within this document, operation refers to NETCONF
NETCONF protocol operations defined in support of NETCONF protocol operations defined in support of NETCONF notifications.
notifications.
Event: An event is something that happens which may be of interest - Event: An event is something that happens which may be of interest -
a configuration change, a fault, a change in status, crossing a a configuration change, a fault, a change in status, crossing a
threshold, or an external input to the system, for example. Often threshold, or an external input to the system, for example. Often
this results in an asynchronous message, sometimes referred to as this results in an asynchronous message, sometimes referred to as
a notification or event notification, being sent to interested a notification or event notification, being sent to interested
parties to notify them that this event has occurred. parties to notify them that this event has occurred.
Replay: The ability to send/re-send previously logged notifications Replay: The ability to send/re-send previously logged notifications
upon request. These notifications are sent asynchronously. This upon request. These notifications are sent asynchronously. This
feature is implemented by the NETCONF server and invoked by the feature is implemented by the NETCONF server and invoked by the
NETCONF client. NETCONF client.
Stream: An event stream is a set of event notifications matching Stream: An event stream is a set of event notifications matching
some forwarding criteria and it is available to NETCONF clients some forwarding criteria and available to NETCONF clients for
for subscription. subscription.
Filter: A parameter that indicates which subset of all possible Filter: A parameter that indicates which subset of all possible
events are of interest. events are of interest. A filter is defined as one or more filter
element [NETCONF], which each identifies a portion of the overall
filter.
1.2. Motivation 1.2. Motivation
The motivation for this work is to enable the sending of asynchronous The motivation for this work is to enable the sending of asynchronous
messages that are consistent with the data model (content) and messages that are consistent with the data model (content) and
security model used within a NETCONF implementation. security model used within a NETCONF implementation.
The scope of the work aims meeting the following operational needs:
o Initial release should ensure it supports notifications in support
of configuration operations.
o It should be possible to use the same data model for notifications
as for configuration operations.
o Solution should support a reasonable message size limit (i.e., not
too short)
o The notifications should be carried over a connection-oriented
delivery mechanism.
o A subscription mechanism for notifications should be provided.
This takes into account that a NETCONF server does not send
notifications before being asked to do so and that it is the
NETCONF client who initiates the flow of notifications.
o A filtering mechanism for sending notifications should be put in
place within the NETCONF server.
o The information contained in a notification should be sufficient
so that it can be analyzed independent of the transport mechanism.
In other words the data content fully describes a notification;
protocol information is not needed to understand a notification.
o The server should have the capability to replay locally logged
notifications.
1.3. Event Notifications in NETCONF 1.3. Event Notifications in NETCONF
This memo defines a mechanism whereby the NETCONF client indicates This memo defines a mechanism whereby the NETCONF client indicates
interest in receiving event notifications from a NETCONF server by interest in receiving event notifications from a NETCONF server by
creating a subscription to receive event notifications. The NETCONF creating a subscription to receive event notifications. The NETCONF
server replies to indicate whether the subscription request was server replies to indicate whether the subscription request was
successful and, if it was successful, begins sending the event successful and, if it was successful, begins sending the event
notifications to the NETCONF client as the events occur within the notifications to the NETCONF client as the events occur within the
system. These event notifications will continue to be sent until system. These event notifications will continue to be sent until
either the NETCONF session is terminated or the subscription either the NETCONF session is terminated or the subscription
terminates for some other reason. The event notification terminates for some other reason. The event notification
subscription allows a number of options to enable the NETCONF client subscription allows a number of options to enable the NETCONF client
to specify which events are of interest. These are specified when to specify which events are of interest. These are specified when
the subscription is created. the subscription is created.
A NETCONF server is will not read RPC requests, by default, on the The NETCONF server MUST accept and process the close-session
session associated with the subscription until the notification operation, even while the notification subscription is active. The
subscription is done. A capability may be advertised to announce NETCONF server MAY accept and process other commands, otherwise they
that a server is able to process RPCs while a notification stream is will be rejected and the server MUST send a 'resource-denied' error.
active on a session. The behaviour of such a capability is outside An example of when other commands would be processed is if a separate
the scope of this document. capability was advertised indicating support of this functionality.
1.4. Requirements
The following requirements have been addressed by the solution:
o Initial release should ensure it supports notification in support
of configuration operations
o Data content must not preclude the use of the same data model as
used in configuration
o Solution should support a reasonable message size limit (ie, not
too short)
o Solution should provide reliable delivery of notifications
o Solution should provide a subscription mechanism (A NETCONF server
does not send notifications before being asked to do so and the
NETCONF client initiates the flow of notifications)
o Solution should provide a filtering mechanism within the NETCONF
server
o Solution should send sufficient information in a notification so
that it can be analyzed independent of the transport mechanism
(data content fully describes a notification; protocol information
is not needed to understand a notification)
o Solution should support replay of locally logged notifications
2. Notification-Related Operations 2. Notification-Related Operations
2.1. Subscribing to Receive Event Notifications 2.1. Subscribing to Receive Event Notifications
The event notification subscription is initiated by the NETCONF The event notification subscription is initiated by the NETCONF
client and responded to by the NETCONF server. When the event client and responded to by the NETCONF server. A subscription is
notification subscription is created, the events of interest are bound to a single stream for the lifetime of the subscription. When
specified. the event notification subscription is created, the events of
interest are specified.
Content for an event notification subscription can be selected by Content for an event notification subscription can be selected by
applying user-specified filters. applying user-specified filters.
2.1.1. <create-subscription> 2.1.1. <create-subscription>
Description: Description:
This operation initiates an event notification subscription which This operation initiates an event notification subscription which
will send asynchronous event notifications to the initiator of the will send asynchronous event notifications to the initiator of the
command until the subscription terminates. command until the subscription terminates.
Parameters: Parameters:
Stream: Stream:
An optional parameter that indicates which stream of events is An optional parameter, <stream>, that indicates which stream of
of interest. If not present, then events in the default events is of interest. If not present, events in the default
NETCONF stream will be sent. NETCONF stream will be sent.
Filter: Filter:
An optional parameter that indicates which subset of all An optional parameter, <filter>, that indicates which subset of
possible events are of interest. The format of this parameter all possible events is of interest. The format of this
is the same as that of the filter parameter in the NETCONF parameter is the same as that of the filter parameter in the
protocol operations. If not present, all events not precluded NETCONF protocol operations. If not present, all events not
by other parameters will be sent. See section 3.6 for more precluded by other parameters will be sent. See section 3.6
information on filters. for more information on filters.
Start Time: Start Time:
A parameter used to trigger the replay feature and indicate A parameter, <startTime>, used to trigger the replay feature
that the replay should start at the time specified. If and indicate that the replay should start at the time
startTime is not present, this is not a replay subscription. specified. If <startTime> is not present, this is not a replay
It is valid to specify start times that are later than the subscription. It is not valid to specify start times that are
current time. If the startTime specified is earlier than the later than the current time. If the <startTime> specified is
log can support, the replay will begin with the earliest earlier than the log can support, the replay will begin with
available notification. This parameter is of type dateTime. the earliest available notification. This parameter is of type
dateTime.
Stop Time: Stop Time:
An optional parameter used with the optional replay feature to An optional parameter, <stopTime>, used with the optional
indicate the newest notifications of interest. If stop time is replay feature to indicate the newest notifications of
not present, the notifications will continue until the interest. If stop time is not present, the notifications will
subscription is terminated. Must be used with and be later continue until the subscription is terminated. Must be used
than 'startTime'. It is valid to specify stop times that are with and be later than <startTime>. A stop times that is later
later than the current time. This parameter is of type than the current time, will be interpreted as being the time of
dateTime. the subscription creation (current time). This parameter is of
type dateTime.
Positive Response: Positive Response:
If the NETCONF server can satisfy the request, the server sends an If the NETCONF server can satisfy the request, the server sends an
<ok> element. <ok> element.
Negative Response: Negative Response:
An <rpc-error> element is included within the <rpc-reply> if the An <rpc-error> element is included within the <rpc-reply> if the
request cannot be completed for any reason. Subscription requests request cannot be completed for any reason. Subscription requests
will fail if a filter with invalid syntax is provided or if the will fail if a filter with invalid syntax is provided or if the
name of a non-existent profile or stream is provided. name of a non-existent stream is provided.
If a stopTime is specified in a request without having specified a If a <stopTime> is specified in a request without having specified
startTime the following error is returned: a <startTime>, the following error is returned:
Tag: missing-element Tag: missing-element
Error-type: protocol Error-type: protocol
Severity: error Severity: error
Error-info: <badElement>: startTime Error-info: <bad-element>: startTime
Description: An expected element is missing. Description: An expected element is missing.
If the optional replay feature is requested but it is not If the optional replay feature is requested but it is not
supported by the NETCONF server, the following error is returned: supported by the NETCONF server, the following error is returned:
Tag: operation-failed Tag: operation-failed
Error-type: protocol Error-type: protocol
skipping to change at page 8, line 48 skipping to change at page 9, line 4
Description: An expected element is missing. Description: An expected element is missing.
If the optional replay feature is requested but it is not If the optional replay feature is requested but it is not
supported by the NETCONF server, the following error is returned: supported by the NETCONF server, the following error is returned:
Tag: operation-failed Tag: operation-failed
Error-type: protocol Error-type: protocol
Severity: error Severity: error
Error-info: none Error-info: none
Description: Request could not be completed because the Description: Request could not be completed because the
requested operation failed for some reason not covered by any requested operation failed for some reason not covered by any
other error condition other error condition
2.1.1.1. Usage Example 2.1.1.1. Usage Example
The following demonstrates creating a simple subscription. More
complex examples can be found in section 5.
<netconf:rpc message-id="101" <netconf:rpc message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"/>
<create-subscription <create-subscription
xmlns="urn:ietf:params:netconf:capability:notification:1.0"> xmlns="urn:ietf:params:netconf:capability:notification:1.0">
</create-subscription> </create-subscription>
</netconf:rpc> </netconf:rpc>
Figure 2
2.2. Sending Event Notifications 2.2. Sending Event Notifications
Once the subscription has been set up, the NETCONF server sends the Once the subscription has been set up, the NETCONF server sends the
event notifications asynchronously over the connection. event notifications asynchronously over the connection.
2.2.1. <notification> 2.2.1. <notification>
Description: Description:
An event notification is sent to the client who initiated a An event notification is sent to the client who initiated a
<create-subscription> command asynchronously when an event of <create-subscription> command asynchronously when an event of
interest (i.e., meeting the specified filtering criteria) to them interest (i.e., meeting the specified filtering criteria) has
has occurred. An event notification is a complete and well-formed occurred. An event notification is a complete and well-formed XML
XML document. Note that <notification> is not an RPC method but document. Note that <notification> is not an RPC method but
rather the top level element identifying the one way message as a rather the top level element identifying the one-way message as a
notification. notification.
Parameters: Parameters:
Contains notification-specific tagged content. The content of eventTime
the data tag is beyond the scope of this document.
The time the event was generated by the event source
Also contains notification-specific tagged content, if any. With
the exception of <eventTime>, the content of the notification is
beyond the scope of this document.
Response: Response:
No response. Not applicable. No response. Not applicable.
2.3. Terminating the Subscription 2.3. Terminating the Subscription
Closing of the event notification subscription can be done by Closing of the event notification subscription can be done by
terminating the NETCONF session ( <kill-session> ) or the underlying terminating the NETCONF session ( <kill-session> ) or the underlying
transport session. If a stop time is provided when the subscription transport session. If a stop time is provided when the subscription
is created, then the subscription will terminate after the stop time is created, the subscription will terminate after the stop time is
is reached. In this case, the NETCONF session will still be an reached. In this case, the NETCONF session will still be an active
active session. session.
3. Supporting Concepts 3. Supporting Concepts
3.1. Capabilities Exchange 3.1. Capabilities Exchange
The ability to process and send event notifications is advertised The ability to process and send event notifications is advertised
during the capability exchange between the NETCONF client and server. during the capability exchange between the NETCONF client and server.
3.1.1. Capability Identifier 3.1.1. Capability Identifier
skipping to change at page 11, line 33 skipping to change at page 11, line 33
<capability> <capability>
urn:ietf:params:netconf:capability:startup:1.0 urn:ietf:params:netconf:capability:startup:1.0
</capability> </capability>
<capability> <capability>
urn:ietf:params:netconf:capability:notification:1.0 urn:ietf:params:netconf:capability:notification:1.0
</capability> </capability>
</capabilities> </capabilities>
<session-id>4</session-id> <session-id>4</session-id>
</hello> </hello>
Figure 3
3.2. Event Streams 3.2. Event Streams
An event stream is defined as a set of event notifications matching An event stream is defined as a set of event notifications matching
some forwarding criteria. some forwarding criteria.
The diagram depicted in Figure 2 illustrates the notification flow Figure 2 illustrates the notification flow and concepts identified in
and concepts identified in this document. The following is observed this document. The following is observed from the diagram below:
from the diagram below: System components (c1..cn) generate event System components (c1..cn) generate event notifications which are
notifications which are passed to a central component for passed to a central component for classification and distribution.
classification and distribution. The central component inspects each The central component inspects each event notification and matches
event notification and matches the event notification against the set the event notification against the set of stream definitions. When a
of stream definitions. When a match occurs, the event notification match occurs, the event notification is considered to be a member of
is considered to be a member of that event stream (stream 1..stream that event stream (stream 1..stream n). An event notification may be
n). An event notification may be part of multiple event streams. part of multiple event streams.
At some point after the NETCONF server receives the internal event
from a stream, it is converted to an appropriate XML encoding by the
server, and a <notification> element is ready to send to all NETCONF
sessions subscribed to that stream.
After generation of the <notification> element, access control is
applied by the server. If a session does not have permission to
receive the <notification>, then it is discarded for that session,
and processing of the internal event is completed for that session.
When a NETCONF client subscribes to a given event stream, user- When a NETCONF client subscribes to a given event stream, user-
defined filters, if applicable, are applied to the event stream and defined filter elements, if applicable, are applied to the event
matching event notifications are forwarded to the NETCONF server for stream and matching event notifications are forwarded to the NETCONF
distribution to subscribed NETCONF clients. For more information on server for distribution to subscribed NETCONF clients. A filter is
filters, see section 3.6. transferred from the client to the server during the <create-
subscription> operation and applied against each <notification>
element generated by the stream. For more information on filtering,
see section 3.6.
A notification logging service may also be available, in which case, A notification logging service may also be available, in which case,
the central component logs notifications. The NETCONF server may the central component logs notifications. The NETCONF server may
later retrieve logged notifications via the optional replay feature. later retrieve logged notifications via the optional replay feature.
For more information on replay, see section 3.3. For more information on replay, see section 3.3.
+----+ +----+
| c1 |----+ available streams | c1 |----+ available streams
+----+ | +---------+ +----+ | +---------+
+----+ | |central |-> stream 1 +----+ | |central |-> stream 1
| c2 | +--->|event |-> stream 2 filter +-------+ | c2 | +--->|event |-> stream 2 filter +-------+
+----+ | |processor|-> NETCONF stream ----->|netconf| +----+ | |processor|-> NETCONF stream ----->|NETCONF|
... | | |-> stream n |server | ... | | |-> stream n |server |
System | +---------+ +-------+ System | +---------+ +-------+
Components| | /\ Components| | /\
... | | || ... | | ||
+----+ | | (------------) || +----+ | | (------------) ||
| cn |----+ | (notification) || | cn |----+ | (notification) ||
+----+ +-----> ( logging ) || +----+ +-----> ( logging ) ||
( service ) || ( service ) ||
(------------) || (------------) ||
|| ||
|| ||
\/ \/
+-------+ +-------+
|netconf| |NETCONF|
|client | |client |
+-------+ +-------+
Figure 4 Figure 2
3.2.1. Event Stream Definition 3.2.1. Event Stream Definition
Event streams are predefined on the managed device. The Event streams are predefined on the managed device. The
configuration of event streams is outside the scope of this document. configuration of event streams is outside the scope of this document.
However, it is envisioned that event streams are either pre- However, it is envisioned that event streams are either pre-
established by the vendor (pre-configured) or user configurable established by the vendor (pre-configured), user configurable (e.g.,
(e.g., part of the device's configuration) or both. Device vendors part of the device's configuration) or both. Device vendors may
may allow event stream configuration via NETCONF protocol (i.e., allow event stream configuration via the NETCONF protocol (i.e.,
edit-config operation). edit-config operation).
3.2.2. Event Stream Content Format 3.2.2. Event Stream Content Format
The contents of all event streams made available to a NETCONF client The contents of all event streams made available to a NETCONF client
(i.e., the notification sent by the NETCONF server) must be encoded (i.e., the notification sent by the NETCONF server) must be encoded
in XML. in XML.
3.2.3. Default Event Stream 3.2.3. Default Event Stream
A NETCONF server implementation supporting the notification A NETCONF server implementation supporting the notification
capability must support the "NETCONF" notification event stream. capability must support the "NETCONF" notification event stream.
This stream contains all NETCONF XML event notifications supported by This stream contains all NETCONF XML event notifications supported by
the NETCONF server. The definition of the event notifications and the NETCONF server. The exact string "NETCONF" is used during
their contents for this event stream is outside the scope of this advertisement of stream support during the <get> operation on
<streams> and during the <create-subscription> operation. Definition
of the event notifications and their contents, beyond the inclusion
of <eventTime>, for this event stream is outside the scope of this
document. document.
3.2.4. Event Stream Sources 3.2.4. Event Stream Sources
With the exception of the default event stream (NETCONF With the exception of the default event stream (NETCONF),
notifications) specification of additional event stream sources specification of additional event stream sources (e.g., SNMP, syslog)
(e.g., SNMP, syslog, etc.) is outside the scope of this document. is outside the scope of this document. NETCONF server
NETCONF server implementations may leverage any desired event stream implementations may leverage any desired event stream source in the
source in the creation of supported event streams. creation of supported event streams.
3.2.5. Event Stream Discovery 3.2.5. Event Stream Discovery
A NETCONF client retrieves the list of supported event streams from a A NETCONF client retrieves the list of supported event streams from a
NETCONF server using the <get> RPC request. NETCONF server using the <get> operation.
3.2.5.1. Name Retrieval using <get> operation 3.2.5.1. Name Retrieval using <get> operation
The list of available event streams is retrieved by requesting the The list of available event streams is retrieved by requesting the
<eventStreams> subtree via a <get> operation. Available event <streams> subtree via a <get> operation. Available event streams for
streams for the requesting session are returned in the reply the requesting session are returned in the reply containing the
containing the <name> and <description> elements, where the <name> <name> and <description> elements, where the <name> element is
element is mandatory and its value is unique within the scope of a mandatory, and its value is unique within the scope of a NETCONF
NETCONF server. The returned list must only include the names of server. An empty reply is returned if there are no available event
those event streams for which the NETCONF session has sufficient streams.
privileges. The NETCONF session privileges are determined via access
control mechanisms which are beyond the scope of this document. An
empty reply is returned if there are no available event streams. The
information is retrieved by requesting the <eventStreams> subtree via
a <get> operation.
Example: Retrieving available event stream list using <get> Additional information available about a stream include whether
operation: notification replay is available and if so, the timestamp of the
earliest possible notification to replay.
The following example shows retrieving the list of available event
stream list using the <get> operation.
<rpc message-id="101" <rpc message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<get> <get>
<filter type="subtree"> <filter type="subtree">
<eventStreams xmlns="urn:ietf:params:xml:ns:netmod:notification"/> <netconf xmlns="urn:ietf:params:xml:ns:netmod:notification">
<streams/>
<netconf>
</filter> </filter>
</get> </get>
</rpc> </rpc>
Figure 5
The NETCONF server returns a list of event streams available for The NETCONF server returns a list of event streams available for
subscription: NETCONF, SNMP, and syslog-critical in this example. subscription: NETCONF, SNMP, and syslog-critical in this example.
<rpc-reply message-id="101" <rpc-reply message-id="101"
xmlns="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns="urn:ietf:params:xml:ns:netconf:base:1.0">
<data> <data>
<eventStreams xmlns="urn:ietf:params:xml:ns:netmod:notification"> <netconf xmlns="urn:ietf:params:xml:ns:netmod:notification">
<streams>
<stream> <stream>
<name>NETCONF</name> <name>NETCONF</name>
<description>Default netconf event stream <description>default NETCONF event stream
</description> </description>
<replaySupport>true</replaySupport> <replaySupport>true</replaySupport>
<replayLogStartTime>2007-07-08T00:00:00Z</replayLogStartTime> <replayLogCreationTime>
2007-07-08T00:00:00Z
</replayLogCreationTime>
</stream> </stream>
<stream> <stream>
<name>SNMP</name> <name>SNMP</name>
<description>SNMP notifications</description> <description>SNMP notifications</description>
<replaySupport>false</replaySupport> <replaySupport>false</replaySupport>
</stream> </stream>
<stream> <stream>
<name>syslog-critical</name> <name>syslog-critical</name>
<description>Critical and higher severity <description>Critical and higher severity
</description> </description>
<replaySupport>true</replaySupport> <replaySupport>true</replaySupport>
<replayLogStartTime>2007-07-01T00:00:00Z</replayLogStartTime> <replayLogCreationTime>
2007-07-01T00:00:00Z
</replayLogCreationTime>
</stream> </stream>
</eventStreams> </streams>
</netconf>
</data> </data>
</rpc-reply> </rpc-reply>
Figure 6
3.2.5.2. Event Stream Subscription 3.2.5.2. Event Stream Subscription
A NETCONF client may request from the NETCONF server the list of A NETCONF client may request from the NETCONF server the list of
event streams available to this session and then issue a <create- event streams available to this session and then issue a <create-
subscription> request with the desired event stream name. Omitting subscription> request with the desired event stream name. Omitting
the event stream name from the <create-subscription> request results the event stream name from the <create-subscription> request results
in subscription to the default NETCONF event stream. in subscription to the default NETCONF event stream.
3.2.5.2.1. Filtering Event Stream Contents 3.2.5.2.1. Filtering Event Stream Contents
The set of event notifications delivered in an event stream may be The set of event notifications delivered in an event stream may be
further refined by applying a user-specified filter at subscription further refined by applying a user-specified filter supplied at
creation time ( <create-subscription> ). This is a transient filter subscription creation time ( <create-subscription> ). This is a
associated with the event notification subscription and does not transient filter associated with the event notification subscription
modify the event stream configuration. and does not modify the event stream configuration. The filter
element is applied against the contents of the <notification> wrapper
and not the wrapper itself. See section 5 for examples. Either
subtree or XPATH filtering can be used.
XPATH support for the Notification capability is advertised as part XPATH support for the Notification capability is advertised as part
of the normal XPATH capability advertisement. If XPATH support is of the normal XPATH capability advertisement. If XPATH support is
advertised via the XPATH capability then XPATH is supported for advertised via the XPATH capability then XPATH is supported for
notification filtering and if this capability is not advertised, then notification filtering and if this capability is not advertised,
XPATH is not supported for notification filtering. XPATH is not supported for notification filtering.
3.3. Notification Replay 3.3. Notification Replay
3.3.1. Overview 3.3.1. Overview
Replay is the ability to create an event subscription that will Replay is the ability to create an event subscription that will
resend recently generated notifications, or in some cases send them resend recently generated notifications, or in some cases send them
for the first time to a particular NETCONF client. These for the first time to a particular NETCONF client. These
notifications are sent the same way as normal notifications. notifications are sent the same way as normal notifications.
A replay of notifications is specified by including an optional A replay of notifications is specified by including the optional
parameter to the subscription command that indicates the start time <startTime> parameter to the subscription command, which indicates
of the replay. The end time is specified using the optional stopTime the start time of the replay. The end time is specified using the
parameter. If not present, notifications will continue to be sent optional <stopTime> parameter. If not present, notifications will
until the subscription is terminated. continue to be sent until the subscription is terminated.
A notification stream that supports replay is not expected to have an A notification stream that supports replay is not expected to have an
unlimited supply of saved notifications available to accommodate any unlimited supply of saved notifications available to accommodate any
replay request. replay request.
The actual number of stored notifications available for retrieval at The actual number of stored notifications available for retrieval at
any given time is a NETCONF server implementation specific matter. any given time is a NETCONF server implementation specific matter.
Control parameters for this aspect of the feature are outside the Control parameters for this aspect of the feature are outside the
scope of the current document. scope of this document.
Replay is dependent on a notification stream supporting some form of Replay is dependent on a notification stream supporting some form of
notification logging, although it puts no restrictions on the size or notification logging, although it puts no restrictions on the size or
form of the log, nor where it resides within the device. Whether or form of the log, or where it resides within the device. Whether or
not a stream supports replay can be discovered by doing a <get> not a stream supports replay can be discovered by doing a <get>
operation on the eventStreams element of the Notification Management operation on the <streams> element of the Notification Management
Schema. This schema also provides the replayLogStartTime element to Schema and looking at the value of the <replaySupport> object. This
indicate the earliest available logged notification. schema also provides the <replayLogCreationTime> element to indicate
the earliest available logged notification.
3.3.2. Creating a Subscription with Replay 3.3.2. Creating a Subscription with Replay
This feature uses optional parameters to the <create-subscription> This feature uses optional parameters to the <create-subscription>
command called 'startTime' and 'stopTime'. 'startTime' identifies the command called <startTime> and <stopTime>. <startTime> identifies the
earliest date and time of interest for event notifications being earliest date and time of interest for event notifications being
replayed and also indicates that a subscription will be providing replayed and also indicates that a subscription will be providing
replay of notifications. Events generated before this time are not replay of notifications. Events generated before this time are not
matched. 'stopTime' specifies the latest date and time of interest matched. <stopTime> specifies the latest date and time of interest
for event notifications being replayed. If it is not present, then for event notifications being replayed. If it is not present, then
notifications will continue to be sent until the subscription is notifications will continue to be sent until the subscription is
terminated. terminated.
Note that startTime and stopTime are associated with the time an Note that <startTime> and <stopTime> are associated with the time an
event was generated by the system. event was generated by the event source.
A replayComplete notification is sent to indicate that all of the A <replayComplete> notification is sent to indicate that all of the
replay notifications have been sent. If this subscription has a stop replay notifications have been sent. If this subscription has a stop
time, then this session becomes a normal NETCONF session again. In time, then this session becomes a normal NETCONF session again. When
a <stopTime> has been specified, <notificationComplete> notification
is the last notification sent on the subscription before it
terminates and the NETCONF session returns to being a normal NETCONF
session. The NETCONF server will then accept <rpc> operations. In
the case of a subscription without a stop time, after the the case of a subscription without a stop time, after the
replayComplete notification has been sent, it can be expected that <replayComplete> notification has been sent, it can be expected that
any notifications generated since the start of the subscription any notifications generated since the start of the subscription
creation will be sent followed by notifications as they arise creation will be sent, followed by notifications as they arise
naturally within the system. naturally within the system.
3.3.3. Replay Complete Notification The <replayComplete> and <notificationComplete> notifications cannot
be filtered out. They will always be sent on a replay subscription
The replayComplete notification is the last notification sent over a that specified a startTime and stopTime respectively.
replay subscription. It indicates that replay is complete. After
this notification is received the subscription is terminated and the
session becomes normal command-response NETCONF session.
The replayComplete can not be filtered out. It will always be sent
on a relay subscription that specified a stop time.
3.4. Notification Management Schema 3.4. Notification Management Schema
This Schema is used to learn about the event streams supported on the This Schema is used to learn about the event streams supported on the
system. It also contains the definition of the replayComplete, which system. It also contains the definition of the <replayComplete> and
is sent to indicate that an event replay has sent all applicable <notificationComplete> notifications, which are sent to indicate that
notifications." an event replay has sent all applicable notifications and that the
subscription has terminated, respectively.
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"
xmlns:ncEvent="urn:ietf:params:netconf:capability:notification:1.0" xmlns:ncEvent="urn:ietf:params:netconf:capability:notification:1.0"
xmlns:manageEvent="urn:ietf:params:xml:ns:netmod:notification" xmlns:manageEvent="urn:ietf:params:xml:ns:netmod:notification"
targetNamespace="urn:ietf:params:xml:ns:netmod:notification" targetNamespace="urn:ietf:params:xml:ns:netmod:notification"
elementFormDefault="qualified" elementFormDefault="qualified"
attributeFormDefault="unqualified"> attributeFormDefault="unqualified"
xml:lang="en" version="1.0">
<xs:annotation> <xs:annotation>
<xs:documentation xml:lang="en"> <xs:documentation xml:lang="en">
A schema that can be used to learn about current A schema that can be used to learn about current
event streams. It also event streams. It also contains the replayComplete
contains the replayComplete notification. and notificationComplete notification.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
<xs:import namespace="http://www.w3.org/XML/1998/namespace" <xs:import namespace="http://www.w3.org/XML/1998/namespace"
schemaLocation="http://www.w3.org/2001/xml.xsd"/> schemaLocation="http://www.w3.org/2001/xml.xsd"/>
<xs:import namespace="urn:ietf:params:xml:ns:netconf:base:1.0" <xs:import namespace="urn:ietf:params:xml:ns:netconf:base:1.0"
schemaLocation= schemaLocation=
"http://www.iana.org/assignments/xml-registry/schema/netconf.xsd"/> "http://www.iana.org/assignments/xml-registry/schema/netconf.xsd"/>
<xs:import namespace= <xs:import namespace=
"urn:ietf:params:netconf:capability:notification:1.0" "urn:ietf:params:netconf:capability:notification:1.0"
schemaLocation= schemaLocation=
"http://www.iana.org/assignments/xml-registry/schema/notification.xsd"/> "http://www.iana.org/assignments/xml-registry/schema/notification.xsd"/>
<!-- The above schemaLocation value is a placeholder and the actual
value will be assigned by IANA -->
<xs:element name="netconf" type="manageEvent:Netconf"/> <xs:element name="netconf" type="manageEvent:Netconf"/>
<xs:complexType name="Netconf"> <xs:complexType name="Netconf">
<xs:sequence> <xs:sequence>
<xs:element name="eventStreams" > <xs:element name="streams" >
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
The list of event streams supported by the The list of event streams supported by the
system. When a query is issued, the returned system. When a query is issued, the returned
set of streams is determined based on user set of streams is determined based on user
privileges. privileges.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
<xs:complexType> <xs:complexType>
<xs:sequence minOccurs="0" maxOccurs="unbounded"> <xs:sequence minOccurs="1" maxOccurs="unbounded">
<xs:element name="stream"> <xs:element name="stream">
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
Stream name and description. Stream name, description and other information.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
<xs:complexType> <xs:complexType>
<xs:sequence> <xs:sequence>
<xs:element name="name" type="xs:string"/> <xs:element name="name"
type="ncEvent:streamNameType">
<xs:annotation>
<xs:documentation>
The name of the event stream. If this is
the default NETCONF stream, this must have
the value "NETCONF".
</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="description" <xs:element name="description"
type="xs:string"/> type="xs:string">
<xs:annotation>
<xs:documentation>
A description of the event stream, including
such information as the type of events that
are sent over this stream.
</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="replaySupport" <xs:element name="replaySupport"
type="xs:boolean"/> type="xs:boolean">
<xs:element name="replayLogStartTime" <xs:annotation>
<xs:documentation>
An indication of whether or not event replay
is available on this stream.
</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="replayLogCreationTime"
type="xs:dateTime" minOccurs="0"> type="xs:dateTime" minOccurs="0">
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
The start time of the log used to The timestamp of the creation of the log
support the replay function. This used to support the replay function on
this stream.
Note that this might be earlier then
the earliest available
notification in the log. This object
is updated if the log resets
for some reason. This
object MUST be present if replay is object MUST be present if replay is
supported. supported.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element> </xs:element>
<xs:element name="replayLogAgedTime"
type="xs:dateTime" minOccurs="0">
<xs:annotation>
<xs:documentation>
The timestamp of the last notification
aged out of the log. This
object MUST be present if replay is
supported and any notifications
have been aged out of the log.
</xs:documentation>
</xs:annotation>
</xs:element>
</xs:sequence> </xs:sequence>
</xs:complexType> </xs:complexType>
</xs:element> </xs:element>
</xs:sequence> </xs:sequence>
</xs:complexType> </xs:complexType>
</xs:element> </xs:element>
</xs:sequence> </xs:sequence>
</xs:complexType> </xs:complexType>
<xs:complexType name="ReplayCompleteNotificationType"> <xs:complexType name="ReplayCompleteNotificationType">
skipping to change at page 18, line 46 skipping to change at page 20, line 38
<xs:element name="replayComplete" <xs:element name="replayComplete"
type="manageEvent:ReplayCompleteNotificationType" type="manageEvent:ReplayCompleteNotificationType"
substitutionGroup="ncEvent:notificationContent"> substitutionGroup="ncEvent:notificationContent">
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
This notification is sent to signal the end of a replay This notification is sent to signal the end of a replay
portion of a subscription. portion of a subscription.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element>
<xs:complexType name="NotificationCompleteNotificationType">
<xs:complexContent>
<xs:extension base="ncEvent:NotificationContentType"/>
</xs:complexContent>
</xs:complexType>
<xs:element name="notificationComplete"
type="manageEvent:NotificationCompleteNotificationType"
substitutionGroup="ncEvent:notificationContent">
<xs:annotation>
<xs:documentation>
This notification is sent to signal the end of a
notification subscription. It is sent in the case
that stopTime was specified during the creation of
the subscription.
</xs:documentation>
</xs:annotation>
</xs:element> </xs:element>
</xs:schema>
Figure 7 </xs:schema>
3.5. Subscriptions Data 3.5. Subscriptions Data
While it may be possible to retrieve information about subscriptions Subscriptions are non-persistent state information and their lifetime
via a get operation, subscriptions are not stored configuration. is defined by their session or by the <stopTime> paramter.
They are non-persistent state information and their lifetime is
defined by their session.
3.6. Filter Mechanics 3.6. Filter Mechanics
When multiple filter elements are specified, they are applied When multiple filter elements are specified, they are applied
collectively, so event notifications need to pass all specified collectively, so event notifications need to pass all specified
filters in order to be sent to the subscriber. If a filter element filter elements in order to be sent to the subscriber. If a filter
is specified to look for data of a particular value, and the data element is specified to look for data of a particular value, and the
item is not present within a particular event notification for its data item is not present within a particular event notification for
value to be checked against, the notification will be filtered out. its value to be checked against, the notification will be filtered
For example, if one were to check for 'severity=critical' in a out. For example, if one were to check for 'severity=critical' in a
configuration event notification where this field was not supported, configuration event notification where this field was not supported,
then the notification would be filtered out. then the notification would be filtered out.
The order that filter elements are applied does not matter since the For subtree filtering, a non-empty node set means that the filter
resulting set of notifications is the intersection of the set of matches. For XPath filtering, the mechanisms defined in [XPATH]
notifications that pass each filtering criteria. should be used to convert the returned value to boolean.
3.6.1. Filtering 3.6.1. Filtering
Filtering is explicitly stated when the event notification Filtering is explicitly stated when the event notification
subscription is created. This is specified via the 'filter' subscription is created. This is specified via the 'filter'
parameter. Filters only exist as parameters to the subscription. parameter. A Filter only exist as a parameter to the subscription.
3.7. Message Flow 3.7. Message Flow
The following figure depicts message flow between a NETCONF client The following figure depicts message flow between a NETCONF client
(C) and NETCONF server (S) in order create a subscription and begin (C) and NETCONF server (S) in order to create a subscription and
the flow of notifications. It is possible that many rpc/rpc-reply begin the flow of notifications. This subscription specified a
sequences occur before the subscription is created or after a <startTime>, so the server starts by replaying logged notifications.
stopTime in a replay subscription, but this is not depicted in the It is possible that many rpc/rpc-reply sequences occur before the
figure. subscription is created, but this is not depicted in the figure.
C S C S
| | | |
| capability exchange | | capability exchange |
|-------------------------->| |-------------------------->|
|<------------------------->| |<------------------------->|
| | | |
| <create-subscription> | | <create-subscription> |
|-------------------------->| |-------------------------->|
|<--------------------------| |<--------------------------|
| <rpc-reply> | | <rpc-reply> |
| | | |
| <notification> | | <notification> |
|<--------------------------| |<--------------------------|
| | | |
| <notification> | | <notification> |
|<--------------------------| |<--------------------------|
| <notification> | (replayComplete)
|<--------------------------|
| | | |
| | | |
| | | |
| <notification> | | <notification> |
|<--------------------------| |<--------------------------|
| | | |
| | | |
| <notification> |
|<--------------------------|
| |
| |
Figure 8 Figure 3
The following figure depicts message flow between a NETCONF client
(C) and NETCONF server (S) in order to create a subscription and
begin the flow of notifications. This subscription specified a
<startTime> and <stopTime> so it starts by replaying logged
notifications and then returns to be a normal command-response
NETCONF session after the <replayComplete> and <notificationComplete>
notifications are sent and it is available to process <rpc> requests.
It is possible that many rpc/rpc-reply sequences occur before the
subscription is created, but this is not depicted in the figure.
C S
| |
| capability exchange |
|-------------------------->|
|<------------------------->|
| |
| <create-subscription> |
|-------------------------->|
|<--------------------------|
| <rpc-reply> |
| |
| <notification> |
|<--------------------------|
| |
| <notification> |
|<--------------------------|
| <notification> | (replayComplete)
|<--------------------------|
| <notification> |(notificationComplete)
|<--------------------------|
| |
| |
| |
| <rpc> |
|-------------------------->|
|<--------------------------|
| <rpc-reply> |
| |
Figure 4
4. XML Schema for Event Notifications 4. XML Schema for Event Notifications
The following [XML Schema] defines NETCONF Event Notifications. The following [XML Schema] defines NETCONF Event Notifications.
<?xml version="1.0" encoding="UTF-8"?> <?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns="urn:ietf:params:netconf:capability:notification:1.0" xmlns="urn:ietf:params:netconf:capability:notification:1.0"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0" xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"
targetNamespace= targetNamespace=
skipping to change at page 22, line 17 skipping to change at page 25, line 17
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element> </xs:element>
<xs:element name="filter" <xs:element name="filter"
type="netconf:filterInlineType" type="netconf:filterInlineType"
minOccurs="0"> minOccurs="0">
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
An optional parameter that indicates An optional parameter that indicates
which subset of all possible events which subset of all possible events
are of interest. The format of this is of interest. The format of this
parameter is the same as that of the parameter is the same as that of the
filter parameter in the NETCONF filter parameter in the NETCONF
protocol operations. If not present, protocol operations. If not present,
all events not precluded by other all events not precluded by other
parameters will be sent. parameters will be sent.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element> </xs:element>
<xs:element name="startTime" type="xs:dateTime" <xs:element name="startTime" type="xs:dateTime"
minOccurs="0" > minOccurs="0" >
skipping to change at page 22, line 48 skipping to change at page 25, line 48
<xs:element name="stopTime" type="xs:dateTime" <xs:element name="stopTime" type="xs:dateTime"
minOccurs="0" > minOccurs="0" >
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
An optional parameter used with the An optional parameter used with the
optional replay feature to indicate the optional replay feature to indicate the
newest notifications of interest. If newest notifications of interest. If
stop time is not present, the stop time is not present, the
notifications will continue until the notifications will continue until the
subscription is terminated. Must be used subscription is terminated. Must be used
with 'startTime'. with startTime.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element> </xs:element>
</xs:sequence> </xs:sequence>
</xs:extension> </xs:extension>
</xs:complexContent> </xs:complexContent>
</xs:complexType> </xs:complexType>
<xs:simpleType name="streamNameType"> <xs:simpleType name="streamNameType">
<xs:annotation> <xs:annotation>
skipping to change at page 23, line 25 skipping to change at page 26, line 25
<xs:restriction base="xs:string"/> <xs:restriction base="xs:string"/>
</xs:simpleType> </xs:simpleType>
<xs:element name="create-subscription" <xs:element name="create-subscription"
type="createSubscriptionType" type="createSubscriptionType"
substitutionGroup="netconf:rpcOperation"> substitutionGroup="netconf:rpcOperation">
<xs:annotation> <xs:annotation>
<xs:documentation> <xs:documentation>
The command to create a notification subscription. It The command to create a notification subscription. It
takes as argument the name of the notification stream takes as argument the name of the notification stream
and filter or profile information. All of those options and filter. Both of those options
limit the content of the subscription. In addition, limit the content of the subscription. In addition,
there are two time-related parameters startTime and there are two time-related parameters, startTime and
stopTime which can be used to select the time interval stopTime, which can be used to select the time interval
of interest. of interest to the notification replay feature.
</xs:documentation> </xs:documentation>
</xs:annotation> </xs:annotation>
</xs:element> </xs:element>
<!-- ************** One-way Operations ******************--> <!-- ************** One-way Operations ******************-->
<!-- <Notification> operation --> <!-- <Notification> operation -->
<xs:complexType name="NotificationContentType"/> <xs:complexType name="NotificationContentType"/>
<xs:element name="notificationContent" <xs:element name="notificationContent"
type="NotificationContentType" abstract="true"/> type="NotificationContentType" abstract="true"/>
<xs:complexType name="NotificationType"> <xs:complexType name="NotificationType">
<xs:sequence> <xs:sequence>
<xs:element name="eventTime" type="xs:dateTime">
<xs:annotation>
<xs:documentation>
The time the event was generated by the event source
</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element ref="notificationContent"/> <xs:element ref="notificationContent"/>
</xs:sequence> </xs:sequence>
</xs:complexType> </xs:complexType>
<xs:element name="notification" type="NotificationType"/> <xs:element name="notification" type="NotificationType"/>
</xs:schema>
Figure 9 </xs:schema>
5. Filtering Examples 5. Filtering Examples
The following section provides examples to illustrate the various The following section provides examples to illustrate the various
methods of filtering content on an event notification subscription. methods of filtering content on an event notification subscription.
5.1. Subtree Filtering In order to illustrate the use of filter expressions, it is necessary
to assume some of the event notification content. The examples below
assume that the event notification schema definition has an <event>
element at the top level consisting of the event class (e.g., fault,
state, config), reporting entity and either severity or operational
state.
XML subtree filtering is not well suited for creating elaborate Examples in this section are generated from the following fictional
filter definitions given that it only supports equality comparisons Schema.
and logical OR operations (e.g., in an event subtree give me all
event notifications which have severity=critical or severity=major or
severity=minor). Nevertheless, it may be used for defining simple
event notification forwarding filters as shown below.
In order to illustrate the use of filter expressions it is necessary <?xml version="1.0" encoding="UTF-8"?>
to assume some of the event notification content. The examples <xs:schema targetNamespace="http://example.com/event/1.0"
herein assume that the event notification schema definition has an xmlns="http://example.com/event/1.0"
<events> element at the top level that contains one or more child elementFormDefault="qualified"
elements <eventEntry> consisting of the event class (e.g., fault, xmlns:xs="http://www.w3.org/2001/XMLSchema"
state, config, etc.) reporting entity and either severity or xmlns:ncEvent="urn:ietf:params:netconf:capability:notification:1.0">
operational state.
Sample event list <xs:import namespace=
"urn:ietf:params:netconf:capability:notification:1.0"
schemaLocation=
"http://www.iana.org/assignments/xml-registry/schema/notification.xsd"/>
<xs:complexType name="eventType">
<xs:complexContent>
<xs:extension base="ncEvent:NotificationContentType">
<xs:sequence>
<xs:element name="eventClass" />
<xs:element name="reportingEntity">
<xs:complexType>
<xs:sequence>
<xs:any namespace="##any"
processContents="lax"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:choice>
<xs:element name="severity"/>
<xs:element name="operState"/>
</xs:choice>
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
<xs:element name="event"
type="eventType"
substitutionGroup="ncEvent:notificationContent"/>
</xs:schema>
The above fictional notification definition could result in the
following is a sample notification list, whihc is used in the
examples in this section.
<notification
xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<eventTime>2007-07-08T00:01:00Z</eventTime>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
<reportingEntity> <reportingEntity>
<card>Ethernet0</card> <card>Ethernet0</card>
</reportingEntity> </reportingEntity>
<severity>major</severity> <severity>major</severity>
</event> </event>
</notification>
<notification
xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<eventTime>2007-07-08T00:02:00Z</eventTime>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
<reportingEntity> <reportingEntity>
<card>Ethernet2</card> <card>Ethernet2</card>
</reportingEntity> </reportingEntity>
<severity>critical</severity> <severity>critical</severity>
</event> </event>
</notification>
<notification
xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<eventTime>2007-07-08T00:04:00Z</eventTime>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
<reportingEntity> <reportingEntity>
<card>ATM1</card> <card>ATM1</card>
</reportingEntity> </reportingEntity>
<severity>minor</severity> <severity>minor</severity>
</event> </event>
</notification>
<notification
xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<eventTime>2007-07-08T00:10:00Z</eventTime>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>state</eventClass> <eventClass>state</eventClass>
<reportingEntity> <reportingEntity>
<card>Ethernet0</card> <card>Ethernet0</card>
</reportingEntity> </reportingEntity>
<operState>enabled</operState> <operState>enabled</operState>
</event> </event>
</notification>
Figure 10 5.1. Subtree Filtering
The following example illustrates selecting events which have XML subtree filtering is not well-suited for creating elaborate
severities of critical, major, or minor (presumably fault events). filter definitions given that it only supports equality comparisons
The filtering criteria evaluation is as follows: and application of the logical OR operators (e.g., in an event
subtree give me all event notifications which have severity=critical
or severity=major or severity=minor). Nevertheless, it may be used
for defining simple event notification forwarding filters as shown
below.
The following example illustrates how to select fault events which
have severities of critical, major, or minor. The filtering criteria
evaluation is as follows:
((severity=critical) | (severity=major) | (severity=minor)) ((severity=critical) | (severity=major) | (severity=minor))
<netconf:rpc netconf:message-id="101" <netconf:rpc netconf:message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<create-subscription <create-subscription
xmlns="urn:ietf:params:netconf:capability:notification:1.0"> xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<filter netconf:type="subtree"> <filter netconf:type="subtree">
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
<severity>critical</severity> <severity>critical</severity>
</event> </event>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
skipping to change at page 27, line 25 skipping to change at page 32, line 42
<severity>major</severity> <severity>major</severity>
</event> </event>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
<severity>minor</severity> <severity>minor</severity>
</event> </event>
</filter> </filter>
</create-subscription> </create-subscription>
</netconf:rpc> </netconf:rpc>
Figure 11 The following example illustrates how to select state or config
The following example illustrates selecting state or config
EventClasses or fault events that are related to card Ethernet0. The EventClasses or fault events that are related to card Ethernet0. The
filtering criteria evaluation is as follows: filtering criteria evaluation is as follows:
( state | config | fault & card=Ethernet0) ( state | config | ( fault & ( card=Ethernet0)))
<netconf:rpc netconf:message-id="101" <netconf:rpc netconf:message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<create-subscription <create-subscription
xmlns="urn:ietf:params:netconf:capability:notification:1.0"> xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<filter netconf:type="subtree"> <filter netconf:type="subtree">
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>fault</eventClass> <eventClass>fault</eventClass>
</event> </event>
<event xmlns="http://example.com/event/1.0"> <event xmlns="http://example.com/event/1.0">
<eventClass>state</eventClass> <eventClass>state</eventClass>
skipping to change at page 28, line 30 skipping to change at page 33, line 31
<reportingElement> <reportingElement>
<card>Ethernet0</card> <card>Ethernet0</card>
</reportingElement> </reportingElement>
</event> </event>
</filter> </filter>
</create-subscription> </create-subscription>
</netconf:rpc> </netconf:rpc>
5.2. XPATH filters 5.2. XPATH filters
The following [XPATH] example illustrates selecting fault EventClass The following [XPATH] example illustrates how to select fault
notifications that have severities of critical, major, or minor. The EventClass notifications that have severities of critical, major, or
filtering criteria evaluation is as follows: minor. The filtering criteria evaluation is as follows:
((fault) & ((severity=critical) | (severity=major) | (severity = ((fault) & ((severity=critical) | (severity=major) | (severity =
minor))) minor)))
<netconf:rpc netconf:message-id="101" <netconf:rpc netconf:message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<create-subscription <create-subscription
xmlns="urn:ietf:params:netconf:capability:notification:1.0"> xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<filter netconf:type="xpath" <filter netconf:type="xpath"
xmlns:ex="http://example.com/event/1.0" xmlns:ex="http://example.com/event/1.0"
select="/ex:event[ex:eventClass='fault' and select="/ex:event[ex:eventClass='fault' and
(ex:severity='minor' or ex:severity='major' (ex:severity='minor' or ex:severity='major'
or ex:severity='critical')]"/> or ex:severity='critical')]"/>
</create-subscription> </create-subscription>
</netconf:rpc> </netconf:rpc>
Figure 13 The following example illustrates how to select state and config
EventClasses or fault events of any severity that come from card
The following example illustrates selecting state and config Ethernet0. The filtering criteria evaluation is as follows:
EventClasses or fault events that have severities of critical, major,
or minor or come from card Ethernet0. The filtering criteria
evaluation is as follows:
(( state | config) & ((fault & severity=critical) | (fault & (( state | config) & (fault & card=Ethernet0))
severity=major) | (fault & severity = minor) | (fault &
card=Ethernet0)))
<netconf:rpc netconf:message-id="101" <netconf:rpc message-id="101"
xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0"> xmlns:netconf="urn:ietf:params:xml:ns:netconf:base:1.0">
<create-subscription <create-subscription
xmlns="urn:ietf:params:netconf:capability:notification:1.0"> xmlns="urn:ietf:params:netconf:capability:notification:1.0">
<filter netconf:type="xpath" <filter netconf:type="xpath"
xmlns:ex="http://example.com/event/1.0" xmlns:ex="http://example.com/event/1.0"
select="/ex:event[ select="/ex:event[
ex:eventClass='fault' and ex:severity='minor') or (ex:eventClass='state' or ex:eventClass='config') and
(ex:eventClass='fault' and ex:severity='major') or ((ex:eventClass='fault' and ex:card='Ethernet0'))]"/>
ex:eventClass='fault' and ex:severity='critical') or
(ex:eventClass='fault' and
ex:reportingElement/ex:card='Ethernet0') or
ex:eventClass='state' or
ex:eventClass='config']"/>
</create-subscription> </create-subscription>
</netconf:rpc> </netconf:rpc>
Figure 14
6. Security Considerations 6. Security Considerations
The security considerations from the base [NETCONF] document apply The security considerations from the base [NETCONF] document also
also to the Notification capability. apply to the Notification capability.
The access control framework and the choice of transport will have a The access control framework and the choice of transport will have a
major impact on the security of the solution. major impact on the security of the solution.
The <notification> elements are never sent before the transport layer The <notification> elements are never sent before the transport layer
and the netconf layer (capabilities exchange) have been established, and the NETCONF layer, including capabilities exchange, have been
and the manager has been identified and authenticated. established, and the manager has been identified and authenticated.
It is recommended that care be taken to ensure the secure operation It is recommended that care be taken to secure execution:
of the following commands:
o <create-subscription> invocation o <create-subscription> invocation
o read-only data models o <get> on read-only data models
o read-write data models
o notification content o <notification> content
One issue related to the notifications draft is the transport of data One potential security issue is the transport of data from non-
from non-netconf streams, such as syslog and SNMP. This data may be NETCONF streams, such as syslog and SNMP. This data may be more
more vulnerable (or is not more vulnerable) when being transported vulnerable (or less vulnerable) when being transported over NETCONF
over netconf than when being transported using the protocol normally than when being transported using the protocol normally used for
used for transporting it, depending on the security credentials of transporting it, depending on the security credentials of the two
the two subsystems. The NETCONF server is responsible for providing subsystems. The NETCONF server is responsible for applying access
access control to stream content. control to stream content.
If a user does not have permission to view content via other NETCONF The contents of notifications as well as the name of event streams
operations it does not have permission to access that content via may contain sensitive information and care should be taken to ensure
Notifications. If a user is not permitted to view one element in the that it is viewed only by authorized users. If a user does not have
content of the notification, the notification is not sent to that permission to view content via other NETCONF operations, it does not
user. have permission to access that content via Notifications. If a user
is not permitted to view one element in the content of the
notification, the notification is not sent to that user.
If a subscription is created with a stopTime, the NETCONF session If a subscription is created with a <stopTime>, the NETCONF session
will return to being a normal command-response NETCONF session when will return to being a normal command-response NETCONF session when
the replay is completed. It is the responsibility of the NETCONF the replay is completed. It is the responsibility of the NETCONF
client to close off this session when it is no longer of use. client to close this session when it is no longer of use.
7. IANA Considerations 7. IANA Considerations
This document registers two URIs for the NETCONF XML namespace in the This document registers three URIs for the NETCONF XML namespace in
IETF XML registry [RFC3688]. the IETF XML registry [RFC3688].
Following the format in RFC 3688, IANA has made the following Following the format in RFC 3688, IANA has made the following
registration. registration.
URI: urn:ietf:params:netconf:capability:notification:1.0 URI: urn:ietf:params:netconf:capability:notification:1.0
URI: urn:ietf:params:xml:ns:netmod:notification URI: urn:ietf:params:xml:ns:netmod:notification
URI: urn:ietf:params:xml:ns:netconf:notification
Registrant Contact: The IESG. Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace. XML: N/A, the requested URI is an XML namespace.
8. Acknowledgements 8. Acknowledgements
Thanks to Gilbert Gagnon, Greg Wilbur and Kim Curran for providing Thanks to Gilbert Gagnon, Greg Wilbur and Kim Curran for providing
their input into the early work on this document. In addition, the their input into the early work on this document. In addition, the
editors would like to acknowledge input at the Vancouver editing editors would like to acknowledge input at the Vancouver editing
session from the following people: Orly Nicklass, James Balestriere, session from the following people: Orly Nicklass, James Balestriere,
Yoshifumi Atarashi, Glenn Waters, Alexander Clemm, Dave Harrington, Yoshifumi Atarashi, Glenn Waters, Alexander Clemm, Dave Harrington,
Dave Partain, Ray Atarashi and Dave Perkins and the following Dave Partain, Ray Atarashi and David Perkins and the following
additional people from the Montreal editing session: Balazs Lengyel, additional people from the Montreal editing session: Balazs Lengyel,
Phil Shafer, Rob Enns, Andy Bierman, Dan Romascanu, Bert Wijnen, Phil Shafer, Rob Enns, Andy Bierman, Dan Romascanu, Bert Wijnen,
Simon Leinen, Juergen Schoenwaelder, Hideki Okita, Vincent Cridlig, Simon Leinen, Juergen Schoenwaelder, Hideki Okita, Vincent Cridlig,
Martin Bjorklund, Olivier Festor, Radu State, Brian Trammell, William Martin Bjorklund, Olivier Festor, Radu State, Brian Trammell, William
Chow. Chow. We would also like to thank Li Yan for his numerous reviews.
9. Normative References 9. Normative References
[NETCONF] Enns, R., "NETCONF Configuration Protocol", RFC 4741, [NETCONF] Enns, R., "NETCONF Configuration Protocol", RFC 4741,
December 2006. December 2006.
[RFC2026] Bradner, S., "The Internet Standards Process -- Revision
3", RFC 2026, BCP 9, October 1996.
[RFC2119] Bradner, s., "Key words for RFCs to Indicate Requirements [RFC2119] Bradner, s., "Key words for RFCs to Indicate Requirements
Levels", RFC 2119, March 1997. Levels", RFC 2119, March 1997.
[RFC2223] Postel, J. and J. Reynolds, "Instructions to RFC Authors",
RFC 2223, October 1997.
[RFC3688] Bradner, s., "The IETF XML Registry", RFC 3688, January [RFC3688] Bradner, s., "The IETF XML Registry", RFC 3688, January
2004. 2004.
[XML] World Wide Web Consortium, "Extensible Markup Language [XML] World Wide Web Consortium, "Extensible Markup Language
(XML) 1.0", W3C XML, February 1998, (XML) 1.0", W3C XML, February 1998,
<http://www.w3.org/TR/1998/REC-xml-19980210>. <http://www.w3.org/TR/1998/REC-xml-19980210>.
[XML Schema] [XML Schema]
Fallside, D. and P. Walmsley, "XML Schema Part 0: Primer Fallside, D. and P. Walmsley, "XML Schema Part 0: Primer
Second Edition", W3C XML Schema, October 2004. Second Edition", W3C XML Schema, October 2004.
skipping to change at page 34, line 37 skipping to change at page 39, line 37
fixed this. fixed this.
9. On page 8, replaced "If the startTime specified is earlier then 9. On page 8, replaced "If the startTime specified is earlier then
the" with 'If the startTime specified is earlier than the" the" with 'If the startTime specified is earlier than the"
10. Updated some name spaces and schemaLocations as per Andy's June 10. Updated some name spaces and schemaLocations as per Andy's June
3rd email. 3rd email.
11. Added discussion of replayLogStartTime to draft in section 3.3.1 11. Added discussion of replayLogStartTime to draft in section 3.3.1
as follows "Whether or not a stream supports replay can be as follows "Whether or not a stream supports replay can be
discovered by doing a <get> operation on the eventStreams discovered by doing a <get> operation on the <streams> elements
elements of the Notification Management Schema. This schema of the Notification Management Schema. This schema also
also provides the replayLogStartTime element to indicate the provides the replayLogStartTime element to indicate the earliest
earliest available logged notification." available logged notification."
12. Removed most of the uses of the phrase 'Note that'. I kept two 12. Removed most of the uses of the phrase 'Note that'. I kept two
uses that prevent sentences from starting with either a lower uses that prevent sentences from starting with either a lower
case letter or an angle bracket. case letter or an angle bracket.
13. In section 3.6 replaced "it will be filtered out" with "the 13. In section 3.6 replaced "it will be filtered out" with "the
notification will be filtered out" notification will be filtered out"
14. In section 3.4, replaced "and the query" with "and to query" 14. In section 3.4, replaced "and the query" with "and to query"
skipping to change at page 37, line 5 skipping to change at page 41, line 29
process RPC requests on the session associated with the process RPC requests on the session associated with the
subscription until the notification subscription is done and may subscription until the notification subscription is done and may
silently discard these requests." with "A NETCONF server is will silently discard these requests." with "A NETCONF server is will
not read RPC requests, by default, on the session associated not read RPC requests, by default, on the session associated
with the subscription until the notification subscription is with the subscription until the notification subscription is
done. done.
36. Updated the notification definition and the replyComplete 36. Updated the notification definition and the replyComplete
notification definition to use a substitution group. notification definition to use a substitution group.
A.2. Version -09
1. In section 5.1 "logical OR operation" -> "application of the
logical OR operator"
2. In section 6 "ensure the secure operation of the following
commands" -> "secure execution"
3. Removed a couple remaining references to named profiles.
4. Updated name datatype in eventStreams element.
5. Modified the cardinality of eventStreams to reflect that there
will always be at least one event stream.
6. Fixed description of examples to remove reference to eventEntry,
which is no longer part of the actual example.
7. In examples, for consistency changed some references to
reportingElement to be reportingEntity
8. Fixed section 3.2, third pararaph to talk about filter elements
instead of filters.
9. Merge section 3.3.2 and section 3.3.3. Delete the first
paragraph in (old) section 3.3.3 since it both duplicates and
contradicts text in section 3.3.2
10. In section 3.2.5.2.1, added clarification to first paragraph
that "Either subtree or XPATH filtering can be used. "
11. Removed discussion of not allowing the return of stream names
for which the user does not have permissions from the body of
the document to the security considerations section.
12. Fixed typos and did wordsmithing in various parts of the
document.
13. In section 2.1, explicitly stated that a subscription is bound
to a single stream for the lifetime of the subscription.
14. removed single quotes around some instances of stopTime and
startTime for consistency. When appropriate, put between angle
brackets.
15. In section 2.1.1, changed "Error-info: <badElement>: startTime"
to use bad-element.
16. In section 2.2.1, under the parameter tag, replaced "Contains
notification-specific tagged content." with "Contains
notification-specific tagged content, if any. "
17. Clarified some text in section 3.2, paragraph 3 around sending
of filters from client and the fitlers later being applied to
the notifications.
18. Fixed target namespace in section 4.
19. Added missing lang and version information to schema in section
3.4
20. Clarified that the examples in section 5 all used the same
example event list.
21. Cleaned up security considerations section.
22. In section 3.4, clarified the definition of replayLogStart time
to be the timestamp of the earliest available notification in
the log used to support the replay function in the description
tag for the object definition.
23. In section 3.3.2, clarified that the time an event was generated
by the system means time an event was generated by the event
source.
24. In section 3.5, deleted discussion about possibly defining
subscriptions in XML Schema.
25. In section 3.6, deleted discussion about filter element
execution order not mattering.
26. Fixed examples in section 5 to add <netconf> tag and to make
other corrections
27. Added XML Schema definition for examples in section 5 and showed
the event list with <notification> wrappers.
28. Added <notificationComplete> notification
29. Removed support of startTime and stopTime in the future.
30. Replaced replayLogStartTime with replayLogCreationTime and
replayLogAgedTime.
Authors' Addresses Authors' Addresses
Sharon Chisholm Sharon Chisholm
Nortel Nortel
3500 Carling Ave 3500 Carling Ave
Nepean, Ontario K2H 8E9 Nepean, Ontario K2H 8E9
Canada Canada
Email: schishol@nortel.com Email: schishol@nortel.com
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