draft-ietf-lmap-information-model-03.txt   draft-ietf-lmap-information-model-04.txt 
Network Working Group T. Burbridge Network Working Group T. Burbridge
Internet-Draft P. Eardley Internet-Draft P. Eardley
Intended status: Standards Track BT Intended status: Standards Track BT
Expires: July 9, 2015 M. Bagnulo Expires: September 6, 2015 M. Bagnulo
Universidad Carlos III de Madrid Universidad Carlos III de Madrid
J. Schoenwaelder J. Schoenwaelder
Jacobs University Bremen Jacobs University Bremen
January 05, 2015 March 5, 2015
Information Model for Large-Scale Measurement Platforms (LMAP) Information Model for Large-Scale Measurement Platforms (LMAP)
draft-ietf-lmap-information-model-03 draft-ietf-lmap-information-model-04
Abstract Abstract
This Information Model applies to the Measurement Agent within a This Information Model applies to the Measurement Agent within a
Large-Scale Measurement Platform. As such it outlines the Large-Scale Measurement Platform. As such it outlines the
information that is (pre-)configured on the MA or exists in information that is (pre-)configured on the MA or exists in
communications with a Controller or Collector within an LMAP communications with a Controller or Collector within an LMAP
framework. The purpose of such an Information Model is to provide a framework. The purpose of such an Information Model is to provide a
protocol and device independent view of the MA that can be protocol and device independent view of the MA that can be
implemented via one or more Control and Report protocols. implemented via one or more Control and Report protocols.
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Internet-Drafts are working documents of the Internet Engineering Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet- working documents as Internet-Drafts. The list of current Internet-
Drafts is at http://datatracker.ietf.org/drafts/current/. Drafts is at http://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months Internet-Drafts are draft documents valid for a maximum of six months
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."
This Internet-Draft will expire on July 9, 2015. This Internet-Draft will expire on September 6, 2015.
Copyright Notice Copyright Notice
Copyright (c) 2015 IETF Trust and the persons identified as the Copyright (c) 2015 IETF Trust and the persons identified as the
document authors. All rights reserved. document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal This document is subject to BCP 78 and the IETF Trust's Legal
Provisions Relating to IETF Documents Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info) in effect on the date of (http://trustee.ietf.org/license-info) in effect on the date of
publication of this document. Please review these documents publication of this document. Please review these documents
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1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Notation . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. Notation . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3. LMAP Information Model . . . . . . . . . . . . . . . . . . . 4 3. LMAP Information Model . . . . . . . . . . . . . . . . . . . 4
3.1. Pre-Configuration Information . . . . . . . . . . . . . . 7 3.1. Pre-Configuration Information . . . . . . . . . . . . . . 7
3.2. Configuration Information . . . . . . . . . . . . . . . . 9 3.2. Configuration Information . . . . . . . . . . . . . . . . 9
3.3. Instruction Information . . . . . . . . . . . . . . . . . 10 3.3. Instruction Information . . . . . . . . . . . . . . . . . 10
3.4. Logging Information . . . . . . . . . . . . . . . . . . . 13 3.4. Logging Information . . . . . . . . . . . . . . . . . . . 13
3.5. Capability and Status Information . . . . . . . . . . . . 15 3.5. Capability and Status Information . . . . . . . . . . . . 15
3.6. Reporting Information . . . . . . . . . . . . . . . . . . 16 3.6. Reporting Information . . . . . . . . . . . . . . . . . . 16
3.7. Common Objects . . . . . . . . . . . . . . . . . . . . . 18 3.7. Common Objects . . . . . . . . . . . . . . . . . . . . . 19
3.7.1. Schedules . . . . . . . . . . . . . . . . . . . . . . 18 3.7.1. Schedules . . . . . . . . . . . . . . . . . . . . . . 19
3.7.2. Channels . . . . . . . . . . . . . . . . . . . . . . 21 3.7.2. Channels . . . . . . . . . . . . . . . . . . . . . . 21
3.7.3. Task Configurations . . . . . . . . . . . . . . . . . 22 3.7.3. Task Configurations . . . . . . . . . . . . . . . . . 22
3.7.4. Timing Information . . . . . . . . . . . . . . . . . 24 3.7.4. Timing Information . . . . . . . . . . . . . . . . . 25
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 27 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 28
5. Security Considerations . . . . . . . . . . . . . . . . . . . 27 5. Security Considerations . . . . . . . . . . . . . . . . . . . 28
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 28 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 29
7. References . . . . . . . . . . . . . . . . . . . . . . . . . 28 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 29
7.1. Normative References . . . . . . . . . . . . . . . . . . 28 7.1. Normative References . . . . . . . . . . . . . . . . . . 29
7.2. Informative References . . . . . . . . . . . . . . . . . 28 7.2. Informative References . . . . . . . . . . . . . . . . . 29
Appendix A. JSON Data Model Example . . . . . . . . . . . . . . 29 Appendix A. JSON Data Model Example . . . . . . . . . . . . . . 30
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 37 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 38
1. Introduction 1. Introduction
A large-scale measurement platform is a collection of components that A large-scale measurement platform is a collection of components that
work in a coordinated fashion to perform measurements from a large work in a coordinated fashion to perform measurements from a large
number of vantage points. The main components of a large-scale number of vantage points. The main components of a large-scale
measurement platform are the Measurement Agents (hereafter MAs), the measurement platform are the Measurement Agents (hereafter MAs), the
Controller(s) and the Collector(s). Controller(s) and the Collector(s).
The MAs are the elements actually performing the measurements. The The MAs are the elements actually performing the measurements. The
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within those protocols. within those protocols.
The granularity of data transmitted in each operation of the Control The granularity of data transmitted in each operation of the Control
and Report Protocols is not dictated by the Information Model. For and Report Protocols is not dictated by the Information Model. For
example, the Instruction object may be delivered in a single example, the Instruction object may be delivered in a single
operation. Alternatively, Schedules and Task Configurations may be operation. Alternatively, Schedules and Task Configurations may be
separated or even each Schedule/Task Configuration may be delivered separated or even each Schedule/Task Configuration may be delivered
individually. Similarly the Information Model does not dictate individually. Similarly the Information Model does not dictate
whether data is read, write, or read/write. For example, some whether data is read, write, or read/write. For example, some
Control Protocols may have the ability to read back Configuration and Control Protocols may have the ability to read back Configuration and
Instruction information which have been previosuly set on the MA. Instruction information which have been previously set on the MA.
Lastly, while some protocols may simply overwrite information (for Lastly, while some protocols may simply overwrite information (for
example refreshing the entire Instruction Information), other example refreshing the entire Instruction Information), other
protocols may have the ability to update or delete selected items of protocols may have the ability to update or delete selected items of
information. information.
The information in these six sections is captured by a number of The information in these six sections is captured by a number of
common information objects. These objects are also described later common information objects. These objects are also described later
in this document and comprise of: in this document and comprise of:
1. Schedules. A set of Schedules tell the MA to do something. 1. Schedules. A set of Schedules tell the MA to do something.
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specify what Tasks the MA should execute. specify what Tasks the MA should execute.
4. Timings. A set of Timing objects that can be referenced from the 4. Timings. A set of Timing objects that can be referenced from the
Schedules. Each Schedule always references exactly one Timing Schedules. Each Schedule always references exactly one Timing
object. A Timing object specfies either a singleton or series of object. A Timing object specfies either a singleton or series of
time events. They are used to indicate when Tasks should be time events. They are used to indicate when Tasks should be
executed. executed.
The following diagram illustrates the structure in which these common The following diagram illustrates the structure in which these common
information objects are referenced. The references are achieved by information objects are referenced. The references are achieved by
each object (Channel, Task Configuration, Timing) being given a short each object (Task Configuration, Timing) being given a short text
text name that is used by other objects. The objects shown in name that is used by other objects. The objects shown in parenthesis
parenthesis are part of the internal object structure of a Schedule. are part of the internal object structure of a Schedule. Channels
are not shown in the diagram since they are only used as an option by
selected Task Configurations but are similarly referenced using a
short text name.
Schedule Schedule
|----------> Timing |----------> Timing
|----------> (Scheduled Tasks) |----------> (Scheduled Tasks)
|----------> Task Configuration |----------> Task Configuration
|----------> Destination Tasks |----------> Destination Tasks
It should be clear that the top-level bahaviour of an MA is simply to It should be clear that the top-level bahaviour of an MA is simply to
execute Schedules. Every action referenced by a Schedule is defined execute Schedules. Every action referenced by a Schedule is defined
as a Task. As such, these actions are configured through Task as a Task. As such, these actions are configured through Task
Configurations and executed according to the Timing referenced by the Configurations and executed according to the Timing referenced by the
Schedule in which they appear. Tasks can implement a variety of Schedule in which they appear. Tasks can implement a variety of
different types of actions. While in terms of the Information Model, different types of actions. While in terms of the Information Model,
all Tasks have the same structure, it can help conceptually to think all Tasks have the same structure, it can help conceptually to think
of different Task categories: of different Task categories:
1. Measurement Tasks measure some aspect of network performance or 1. Measurement Tasks measure some aspect of network performance or
traffic. They may also capture contextual information from the traffic. They may also capture contextual information from the
MA device or network interfaces such the the device type or MA device or network interfaces such as the device type or
available interface speed. interface speed.
2. Data Transfer Tasks 2. Data Transfer Tasks
A. Reporting Tasks report the results of Measurement Tasks to A. Reporting Tasks report the results of Measurement Tasks to
Collectors Collectors
B. Control Task(s) implement the Control Protocol and B. Control Task(s) implement the Control Protocol and
communicate with the Controller. Depending on the Control communicate with the Controller. Depending on the Control
Protocol there may be a number of specialist tasks such as: Protocol there may be a number of specialist tasks such as:
Configuration Task; Instruction Task; Suppression Task; Configuration Task; Instruction Task; Suppression Task;
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4. Data Management Tasks may exist to clean-up, filter or compress 4. Data Management Tasks may exist to clean-up, filter or compress
data on the MA such as Measurement Task results data on the MA such as Measurement Task results
3.1. Pre-Configuration Information 3.1. Pre-Configuration Information
This information is the minimal information that needs to be pre- This information is the minimal information that needs to be pre-
configured to the MA in order for it to successfully communicate with configured to the MA in order for it to successfully communicate with
a Controller during the registration process. Some of the Pre- a Controller during the registration process. Some of the Pre-
Configuration Information elements are repeated in the Configuration Configuration Information elements are repeated in the Configuration
Information in order to allow an LMAP Contoller to update these Information in order to allow an LMAP Controller to update these
items. The pre-configuration information also contains some elements items. The pre-configuration information also contains some elements
that are not under the control of the LMAP framework (such as the the that are not under the control of the LMAP framework (such as the
device identifier and device security credentials). device identifier and device security credentials).
This Pre-Configuration Information needs to include a URL of the This Pre-Configuration Information needs to include a URL of the
initial Controller from where configuration information can be initial Controller from where configuration information can be
communicated along with the security information required for the communicated along with the security information required for the
communication including the certificate of the Controller (or the communication including the certificate of the Controller (or the
certificate of the Certification Authority which was used to issue certificate of the Certification Authority which was used to issue
the certificate for the Controller). All this is expressed as a the certificate for the Controller). All this is expressed as a
Channel. While multiple Channels may be provided in the Pre- Channel. While multiple Channels may be provided in the Pre-
Configuration Information they must all be associated with a single Configuration Information they must all be associated with a single
Controller (e.g. over different interfaces or network protocols). Controller (e.g. over different interfaces or network protocols).
Where the MA pulls information from the Controller, the Pre- Where the MA pulls information from the Controller, the Pre-
Configuration Information also needs to contain the timing of the Configuration Information also needs to contain the timing of the
communication with the Controller as well as the nature of the communication with the Controller as well as the nature of the
communication itself (such as the protocol and data to be communication itself (such as the protocol and data to be
transfered). The timing is given as a Schedule that executes the transferred). The timing is given as a Schedule that executes the
Task(s) responsible for communication with the Controller. It is Task(s) responsible for communication with the Controller. It is
this Task (or Tasks) that implement the Control protocol between the this Task (or Tasks) that implement the Control protocol between the
MA and the Controller and utlises the Channel information. The MA and the Controller and utilises the Channel information. The
Task(s) may take additional parameters in which case a Task Task(s) may take additional parameters in which case a Task
Configuration can also be included. Configuration can also be included.
Even where information is pushed to the MA from the Controller Even where information is pushed to the MA from the Controller
(rather than pulled by the MA), a Schedule still needs to be (rather than pulled by the MA), a Schedule still needs to be
supplied. In this case the Schedule will simply execute a Controller supplied. In this case the Schedule will simply execute a Controller
listener task when the MA is started. A Channel is still required listener task when the MA is started. A Channel is still required
for the MA to establish secure communication with the Controller. for the MA to establish secure communication with the Controller.
It can be seen that these Channels, Schedules and Task Configurations It can be seen that these Channels, Schedules and Task Configurations
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since they are common to several parts of the information model. since they are common to several parts of the information model.
3.2. Configuration Information 3.2. Configuration Information
During registration or at any later point at which the MA contacts During registration or at any later point at which the MA contacts
the Controller (or vice-versa), the choice of Controller, details for the Controller (or vice-versa), the choice of Controller, details for
the timing of communication with the Controller or parameters for the the timing of communication with the Controller or parameters for the
communication Task(s) can be changed (as captured by the Channels, communication Task(s) can be changed (as captured by the Channels,
Schedules and Task Configurations objects). For example the pre- Schedules and Task Configurations objects). For example the pre-
configured Controller (specified as a Channel or Channels) may be configured Controller (specified as a Channel or Channels) may be
over-riden with a specific Controller that is more appropriate to the over-ridden with a specific Controller that is more appropriate to
MA device type, location or characteristics of the network (e.g. the MA device type, location or characteristics of the network (e.g.
access technology type or broadband product). The initial access technology type or broadband product). The initial
communication Schedule may be over-ridden with one more relevant to communication Schedule may be over-ridden with one more relevant to
routine communications between the MA and the Controller. routine communications between the MA and the Controller.
While some Control protocols may only use a single Schedule, other While some Control protocols may only use a single Schedule, other
protocolsmay use several Schedules (and related data transfer Tasks) protocols may use several Schedules (and related data transfer Tasks)
to update the Configuration Information, transfer the Instruction to update the Configuration Information, transfer the Instruction
Information, transfer Capability and Status Information and send Information, transfer Capability and Status Information and send
other information to the Controller such as log or error other information to the Controller such as log or error
notifications. Multiple Channels may be used to communicate with the notifications. Multiple Channels may be used to communicate with the
same Controller over multiple interfaces (e.g. to send logging same Controller over multiple interfaces (e.g. to send logging
information over a different network). information over a different network).
In addition the MA will be given further items of information that In addition the MA will be given further items of information that
relate specifically to the MA rather than the measurements it is to relate specifically to the MA rather than the measurements it is to
conduct or how to report results. The assignment of an ID to the MA conduct or how to report results. The assignment of an ID to the MA
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Schedule with the Controller and the duration for which the system is Schedule with the Controller and the duration for which the system is
willing to tolerate continued operation with potentially stale willing to tolerate continued operation with potentially stale
Instruction Information. Instruction Information.
While Pre-Configuration Information is persistent upon device reset While Pre-Configuration Information is persistent upon device reset
or power cycle, the persistency of the Configuration Information may or power cycle, the persistency of the Configuration Information may
be device dependent. Some devices may revert back to their pre- be device dependent. Some devices may revert back to their pre-
configuration state upon reboot or factory reset, while other devices configuration state upon reboot or factory reset, while other devices
may store all Configuration and Instruction information in persistent may store all Configuration and Instruction information in persistent
storage. A Controller can check whether an MA has the latest storage. A Controller can check whether an MA has the latest
Configuration and Instruction information by examing the Capability Configuration and Instruction information by examining the Capability
and Status information for the MA. and Status information for the MA.
It should be noted that control shedules and tasks cannot be It should be noted that control shcedules and tasks cannot be
suppressed as evidenced by the lack of suppression information in the suppressed as evidenced by the lack of suppression information in the
Configuration. The control schedule must only reference tasks listed Configuration. The control schedule must only reference tasks listed
as control tasks (i.e. within the Configuration information). Any as control tasks (i.e. within the Configuration information). Any
suppress-by-default flag against control tasks will be ignored. suppress-by-default flag against control tasks will be ignored.
Detail of the additional and updated information model elements: Detail of the additional and updated information model elements:
// MA Configuration // MA Configuration
object { object {
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2. Report Channels 2. Report Channels
3. Instruction Schedules 3. Instruction Schedules
4. Suppression 4. Suppression
The Instruction supports the execution of all Tasks on the MA except The Instruction supports the execution of all Tasks on the MA except
those that deal with communication with the Controller (specified in those that deal with communication with the Controller (specified in
(pre-)configuration information). The Tasks are configured in (pre-)configuration information). The Tasks are configured in
Instruction Task Configurations and included by reference in Instruction Task Configurations and included by reference in
Instruction Schdules that specify when to execute them. The results Instruction Schedules that specify when to execute them. The results
can be communicated to other Tasks or a Task may implement a can be communicated to other Tasks or a Task may implement a
Reporting Protocol and communicate results over Report Channels. Reporting Protocol and communicate results over Report Channels.
Suppression is used to temporarily stop the excution of new Tasks as Suppression is used to temporarily stop the execution of new Tasks as
specified by the Instruction Schedules (and optionally to stop specified by the Instruction Schedules (and optionally to stop
ongoing Tasks). ongoing Tasks).
A Task Configuration is used to configure the mandatory and optional A Task Configuration is used to configure the mandatory and optional
parameters of a Task. It also serves to instruct the MA about the parameters of a Task. It also serves to instruct the MA about the
Task including the ability to resolve the Task to an executable and Task including the ability to resolve the Task to an executable and
specifying the schema for the Task parameters. specifying the schema for the Task parameters.
A Report Channel defines how to communicate with a single remote A Report Channel defines how to communicate with a single remote
system specified by a URL. A Report Channel is used to send results system specified by a URL. A Report Channel is used to send results
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at a later time. at a later time.
The explicit Suppression instruction message is able to simply The explicit Suppression instruction message is able to simply
enable/disable all Instruction Tasks (that are enabled for default enable/disable all Instruction Tasks (that are enabled for default
suppression) as well as having fine control on which Tasks are suppression) as well as having fine control on which Tasks are
suppressed. Suppression of both specified Task Configurations and suppressed. Suppression of both specified Task Configurations and
Measurement Schedules is supported. Support for disabling specific Measurement Schedules is supported. Support for disabling specific
Task Configurations allows malfunctioning or mis-configured Tasks or Task Configurations allows malfunctioning or mis-configured Tasks or
Task Configurations that have an impact on a particular part of the Task Configurations that have an impact on a particular part of the
network infrastructure (e.g., a particular Measurement Peer) to be network infrastructure (e.g., a particular Measurement Peer) to be
targetted. Support for disabling specific Schedules allows for targeted. Support for disabling specific Schedules allows for
particularly heavy cycles or sets of less essential Measurement Tasks particularly heavy cycles or sets of less essential Measurement Tasks
to be suppressed quickly and effectively. Note that Suppression has to be suppressed quickly and effectively. Note that Suppression has
no effect on either Controller Tasks or Controller Schedules. no effect on either Controller Tasks or Controller Schedules.
When no tasks or schedules are explicitly listed, all Instruction When no tasks or schedules are explicitly listed, all Instruction
tasks will be suppressed (or not) as indicated by the suppress-by- tasks will be suppressed (or not) as indicated by the suppress-by-
default flag in the Task Configuration. If tasks or schedules are default flag in the Task Configuration. If tasks or schedules are
listed explicitly then only these listed tasks or schedules will be listed explicitly then only these listed tasks or schedules will be
suppressed regardless of the suppress-by-default flag. If both suppressed regardless of the suppress-by-default flag. If both
individual tasks and individual schedules are listed then only the individual tasks and individual schedules are listed then only the
listed schedules, plus the listed tasks where present in other listed schedules, plus the listed tasks where present in other
schedules, will be suppressed regardless of the suppress-by-default schedules, will be suppressed regardless of the suppress-by-default
flag. flag.
Suppression stops new Tasks from executing. In addtion, the Suppression stops new Tasks from executing. In addition, the
Suppression information also supports an additional Boolean that is Suppression information also supports an additional Boolean that is
used to select whether on-going tasks are also to be terminated. used to select whether on-going tasks are also to be terminated.
Unsuppression is achieved through either overwriting the Measurement Unsuppression is achieved through either overwriting the Measurement
Suppression information (e.g. changing 'enabled' to False) or through Suppression information (e.g. changing 'enabled' to False) or through
the use of an End time such that the Measurement Suppression will no the use of an End time such that the Measurement Suppression will no
longer be in effect beyond this time. The datetime format used for longer be in effect beyond this time. The datetime format used for
all elements in the information model (e.g. the suppression start and all elements in the information model (e.g. the suppression start and
end dates) MUST conform to RFC 3339 [RFC3339]. end dates) MUST conform to RFC 3339 [RFC3339].
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Tasks/Roles (specified by a registry entry) that are actually Tasks/Roles (specified by a registry entry) that are actually
installed or available on the MA. Status information includes the installed or available on the MA. Status information includes the
times that operations were last performed such as contacting the times that operations were last performed such as contacting the
Controller or producing Reports. Controller or producing Reports.
MA Status information model elements: MA Status information model elements:
// Main MA Status information object // Main MA Status information object
object { object {
uuid ma-agent-id; uuid ma-agent-id;
urn ma-device-id; urn ma-device-id;
string ma-hardware; string ma-hardware;
string ma-firmware; string ma-firmware;
string ma-version; string ma-version;
ma-interface-obj ma-interfaces<0..*>; ma-interface-obj ma-interfaces<0..*>;
ma-task-capability-obj ma-supported-tasks<0..*>;
datetime ma-last-task; datetime ma-last-started;
datetime ma-last-report; [ma-condition-obj ma-conditions<0..*>;]
datetime ma-last-instruction; [ma-task-status-obj ma-task-status<0..*>;]
datetime ma-last-configuration; } ma-status-obj;
// Per-Task status information and conditions
[ma-condition-obj ma-conditions<0..*>;] object {
string ma-task-name;
string ma-task-role;
uri ma-task-registry;
datetime ma-task-last-invocation;
datetime ma-task-last-successful;
string ma-task-last-successful-message;
datetime ma-task-last-failed;
string ma-task-last-failed-message;
[ma-condition-obj ma-task-conditions<0..*>];
} ma-task-status-obj
ma-task-capability-obj ma-supported-tasks<0..*>;
} ma-status-obj;
// Additional status conditions // Additional status conditions
object { object {
string ma-condition-code; int ma-condition-code;
string ma-condition-text; string ma-condition-text;
} ma-condition-obj } ma-condition-obj
// Interface information // Interface information
object { object {
string ma-interface-name; string ma-interface-name;
string ma-interface-type; string ma-interface-type;
[int ma-interface-speed;] // bps [int ma-interface-speed;] // bps
[string ma-link-layer-address;] [string ma-link-layer-address;]
[ip-address ma-interface-ip-addresses<0..*>]; [ip-address ma-interface-ip-addresses<0..*>];
[ip-address ma-interface-gateways<0..*>;] [ip-address ma-interface-gateways<0..*>;]
[ip-address ma-interface-dns-servers<0..*>;] [ip-address ma-interface-dns-servers<0..*>;]
} ma-interface-obj; } ma-interface-obj;
// Supported tasks/roles // Supported tasks/roles
object { object {
string ma-task-name; string ma-task-name;
string ma-task-role;
uri ma-task-registry; uri ma-task-registry;
} ma-task-capability-obj; } ma-task-capability-obj;
3.6. Reporting Information 3.6. Reporting Information
At a point in time specified by a Schedule, the MA will execute a At a point in time specified by a Schedule, the MA will execute a
task or tasks that communicate a set of measurement results to the task or tasks that communicate a set of measurement results to the
Collector. Some of these Tasks (notably Reporting Tasks) will Collector. These Reporting Tasks will be configured to transmit task
understand how to transmit task results over a specified Report results over a specified Report Channel to a Collector.
Channel to a Collector. Where to send the data is defined within the
Task Configuration for the Reporting Task.
It should be noted that the output from Tasks does not need to be It should be noted that the output from Tasks does not need to be
sent to communication Channels. It can alternatively, or sent to communication Channels. It can alternatively, or
additionally, be sent to other Tasks on the MA. This facilitates additionally, be sent to other Tasks on the MA. This facilitates
using a first Measurement Task to control the operation of a later using a first Measurement Task to control the operation of a later
Measurement Task (such as first probing available line speed and then Measurement Task (such as first probing available line speed and then
adjusting the operation of a video testing measurement) and also to adjusting the operation of a video testing measurement) and also to
allow local processing of data to output alarms (e.g. when allow local processing of data to output alarms (e.g. when
performance drops from earlier levels). Of course, subsequent Tasks performance drops from earlier levels). Of course, subsequent Tasks
also include Tasks that implement the reporting protocol(s) and also include Tasks that implement the reporting protocol(s) and
transfer data to one or more Collector(s). transfer data to one or more Collector(s).
The report is structured hierarchically to avoid repetition of report The Report generated by a Reporting Task is structured hierarchically
header and Measurement Task Configuration information. The report to avoid repetition of report header and Measurement Task
starts with the timestamp of the report generation on the MA and Configuration information. The report starts with the timestamp of
details about the MA including the optional Measurement Agent ID and the report generation on the MA and details about the MA including
Group ID (controlled by the Configuration Information). the optional Measurement Agent ID and Group ID (controlled by the
Configuration Information).
Much of the report Information is optional and will depend on the Much of the report Information is optional and will depend on the
implementation of the Reporting Task and any parameters defined in implementation of the Reporting Task and any parameters defined in
the Task Configuration for the Reporting Task. For example some the Task Configuration for the Reporting Task. For example some
Reporting Tasks may choose not to include the Measurement Task Reporting Tasks may choose not to include the Measurement Task
Configuration or Sscheduled task parameters, while others may do so Configuration or scheduled task parameters, while others may do so
dependent on the Controller setting a configurable parameter in the dependent on the Controller setting a configurable parameter in the
Task Configuration. Task Configuration.
It is possible for a Reporting Task to send just the Report header It is possible for a Reporting Task to send just the Report header
(datetime and optional agent ID and/or Group ID) if no measurement (datetime and optional agent ID and/or Group ID) if no measurement
data is available. Whether to send such empty reports again is data is available. Whether to send such empty reports again is
dependent on the implementation of the Reporting Task and potential dependent on the implementation of the Reporting Task and potential
Task Configuration parameter. Task Configuration parameter.
The handling of measurement data on the MA before generating a Report The handling of measurement data on the MA before generating a Report
skipping to change at page 17, line 44 skipping to change at page 18, line 11
reported by individual tasks at the time they execute. Either a reported by individual tasks at the time they execute. Either a
Measurement Task can report contextual parameters that are relevant Measurement Task can report contextual parameters that are relevant
to that particular measurement, or specific tasks can be used to to that particular measurement, or specific tasks can be used to
gather a set of contextual and environmental data. at certain times gather a set of contextual and environmental data. at certain times
independent of the reporting schedule. independent of the reporting schedule.
After the report header information the results are reported grouped After the report header information the results are reported grouped
according to different Measurement Task Configurations. Each Task according to different Measurement Task Configurations. Each Task
section optionally starts with replicating the Measurement Task section optionally starts with replicating the Measurement Task
Configuration information before the result headers (titles for data Configuration information before the result headers (titles for data
columns) and the result data rows. columns) and the result data rows. The Options reported are those
used for the scheduled execution of the Measurement Task and
therefore include the Options specified in the Task Configuration as
well as additional Options specified in the Scheduled Task. The
Scheduled Task Options are appended to the Task Configuration Options
in exactly the same order as they were provided to the Task during
execution.
The result row data includes a time for the start of the measurement The result row data includes a time for the start of the measurement
and optionally an end time where the duration also needs to be and optionally an end time where the duration also needs to be
considered in the data analysis. considered in the data analysis.
Some Measurement Tasks may optionally include an indication of the Some Measurement Tasks may optionally include an indication of the
cross-traffic although the meaning a definition of cross-traffic is cross-traffic although the meaning a definition of cross-traffic is
left up to each individual Measurement Task. Some Measurement Tasks left up to each individual Measurement Task. Some Measurement Tasks
may also output other environmental measures in addtion to cross- may also output other environmental measures in addition to cross-
traffic such as CPU utlisation or interface speed. traffic such as CPU utlilisation or interface speed.
Where the Configuration and Instruction information represent Where the Configuration and Instruction information represent
information transmitted via the Control Protocol, the Report information transmitted via the Control Protocol, the Report
represents the information that is transmitted via the Report represents the information that is transmitted via the Report
Protocol. It is constructed at the time of sending a report and Protocol. It is constructed at the time of sending a report and
represents the inherent structure of the information that is sent to represents the inherent structure of the information that is sent to
the Collector. the Collector.
Information model elements: Information model elements:
skipping to change at page 19, line 12 skipping to change at page 19, line 39
Tasks. Each Schedule contains basically two elements: a list of Tasks. Each Schedule contains basically two elements: a list of
Tasks to be executed and a timing object for the Schedule. The Tasks to be executed and a timing object for the Schedule. The
Schedule states what Tasks to run (with what configuration) and when Schedule states what Tasks to run (with what configuration) and when
to run the Tasks. to run the Tasks.
Multiple Tasks in the list of a single Measurement Schedule will be Multiple Tasks in the list of a single Measurement Schedule will be
executed in order with minimal gaps. Tasks in different Schedules executed in order with minimal gaps. Tasks in different Schedules
execute in parallel with such conflicts being reported in the execute in parallel with such conflicts being reported in the
Reporting Information. If two or more Schedules have the same start Reporting Information. If two or more Schedules have the same start
time, then the two will execute in parallel. There is no mechanism time, then the two will execute in parallel. There is no mechanism
to prioritise one schedule over another or to mutex schduled tasks. to prioritise one schedule over another or to mutex scheduled tasks.
As well as specifying which Tasks to execute, the Schedule also As well as specifying which Tasks to execute, the Schedule also
specifies how to link the data outputs from each scheduled task to specifies how to link the data outputs from each scheduled task to
other scheduled tasks. Specifying this within the Schedule allows other scheduled tasks. Specifying this within the Schedule allows
the highest level of flexibility since it is even possible to send the highest level of flexibility since it is even possible to send
the output from different executions of the same Task Configuration the output from different executions of the same Task Configuration
to different destinations. Since a single Task may have multiple to different destinations. Since a single Task may have multiple
outputs, the Schedule can independently specify which outputs go to outputs, the Schedule can independently specify which outputs go to
which destinations. For example, a Measurement Task might report which destinations. For example, a Measurement Task might report
routine results to a data Reporting Task that communicates hourly via routine results to a data Reporting Task that communicates hourly via
the Broadband PPP interface, but also outputs emergency conditions the Broadband PPP interface, but also outputs emergency conditions
via an alarm Reporting Task communicating immediately over a GPRS via an alarm Reporting Task communicating immediately over a GPRS
channel. Note that task-to-task data transfer is always specified in channel. Note that task-to-task data transfer is always specified in
association with the scheduled execution of the sending task - there association with the scheduled execution of the sending task - there
is no need for a corresponding input specification for the receiving is no need for a corresponding input specification for the receiving
task. While it is likely that an MA implementation will use a queue task. While it is likely that an MA implementation will use a queue
mechanism between the scheduled tasks, this Information Model does mechanism between the scheduled tasks, this Information Model does
not mandate or define a queue, or any potential associated parameters not mandate or define a queue, or any potential associated parameters
such as storage size and retention policies. such as storage size and retention policies.
When specifying the task to execute withi the Schedule, it is When specifying the task to execute within the Schedule, it is
possible to add to the task configuration option parameters. This possible to add to the task configuration option parameters. This
allows the Task Configuration to deterimine the common allows the Task Configuration to determine the common characteristics
characteristics of a Task, while selected parameters (e.g. the test of a Task, while selected parameters (e.g. the test target URL) are
target URL) are defined within the schedule. A single Tasks defined within the schedule. A single Tasks Configuration can even
Configuration can even be used multiple times in the same schedule be used multiple times in the same schedule with different additional
with different additional parameters. This allows for effciency in parameters. This allows for efficiency in creating and transferring
creating and transferring the Instruction. Note that the semantics the Instruction. Note that the semantics of what happens if an
of what happens if an option is defined multiple times (either in the option is defined multiple times (either in the Task Configuration,
Task Configuration, Schedule or in both) is not standardised and will Schedule or in both) is not standardised and will depend upon the
depend upon the Task. For example some tasks may legitimately take Task. For example, some tasks may legitimately take multiple values
multiple values for a single parameter. for a single parameter.
Where Options are specified in both the Schedule and the Task
Configuration, the Schedule Options are appended to those specified
in the Task Configuration.
Example: A Schedule references a single Measurement Task Example: A Schedule references a single Measurement Task
Configuration for the UDP latency. It specifies that results are Configuration for the UDP latency. It specifies that results are
to be sent to a scheduled Reporting Task. This Reporting Task is to be sent to a scheduled Reporting Task. This Reporting Task is
executed by a separate Schedule that specifies that it should run executed by a separate Schedule that specifies that it should run
hourly at 5 minutes past the hour. When run this Reporting Task hourly at 5 minutes past the hour. When run this Reporting Task
takes the data generated by the UDP latency Task as well as any takes the data generated by the UDP latency Task as well as any
other data to be included in the hourly report and transfers it to other data to be included in the hourly report and transfers it to
the Collector over the Report Channel specified within its own the Collector over the Report Channel specified within its own
Schedule. Schedule.
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// Scheduled Task object with reference (by name string) to Task // Scheduled Task object with reference (by name string) to Task
// Configuration and mappings of data outputs to destination tasks // Configuration and mappings of data outputs to destination tasks
object { object {
string ma-schedule-task-name; string ma-schedule-task-name;
[name-value-pair ma-schedule-task-options<0..*>]; [name-value-pair ma-schedule-task-options<0..*>];
[ma-sched-downstream-tasks-obj ma-schedule-destination-tasks<0..*>;] [ma-sched-downstream-tasks-obj ma-schedule-destination-tasks<0..*>;]
} ma-sched-task-obj; } ma-sched-task-obj;
// Specification of destination scheduled tasks using reference // Specification of destination scheduled tasks using reference
// to schedule and task configuration configuration names. Mapping // to schedule and task configuration names. Mapping of
// of integer denoted data outputs to destination schduled task // integer denoted data outputs to destination scheduled task
object { object {
[string ma-schedule-task-destination-schedule-name]; [string ma-schedule-task-destination-schedule-name];
[string ma-schedule-task-destination-task-configuration-name]; [string ma-schedule-task-destination-task-configuration-name];
[int ma-schedule-task-output-selection<0..*>;] // default: all [int ma-schedule-task-output-selection<0..*>;] // default: all
} ma-sched-destination-tasks-obj; } ma-sched-destination-tasks-obj;
Example: A measurement task has two defined inter-task outputs, one Example: A measurement task has two defined inter-task outputs, one
for routine measurement results and one for errors during the task for routine measurement results and one for errors during the task
execution. These are defined as available outputs by the task and execution. These are defined as available outputs by the task and
are denoted by the integers 1 & 2. In this example, both outputs are denoted by the integers 1 & 2. In this example, both outputs
are sent to the same reporting task called "Hourly reporting Task" are sent to the same reporting task called "Hourly reporting Task"
that is excuted from the "Hourly Schedule" schedule. This is done that is executed from the "Hourly Schedule" schedule. This is
by creating a ma-sched-destination-tasks-obj with the output done by creating a ma-sched-destination-tasks-obj with the output
selection as [1,2] and the destination task configuration name as selection as [1,2] and the destination task configuration name as
["Hourly Reporting Task"] and the destination schedule name as ["Hourly Reporting Task"] and the destination schedule name as
"Hourly Schedule". "Hourly Schedule".
Measurement Task Measurement Task
Output 1 -----+----> "Hourly Schedule":"Hourly Reporting Task" Output 1 -----+----> "Hourly Schedule":"Hourly Reporting Task"
Output 2 ----/ Output 2 ----/
3.7.2. Channels 3.7.2. Channels
A Channel defines a bi-directional communication channel between the A Channel defines a bi-directional communication channel between the
MA and a Controller or Collector. Multiple Channels can be defined MA and a Controller or Collector. Multiple Channels can be defined
to enable results to be split or duplicated across different to enable results to be split or duplicated across different
Collectors. Collectors.
Each Channel contains the details of the remote endpoint (including Each Channel contains the details of the remote endpoint (including
location and security credential information such as the location and security credential information such as the
certificate). The timing of when to communicate over a Channel is certificate). The timing of when to communicate over a Channel is
specified within the Schedule. The certificate can be the digital specified by the Schedule which executes the corresponding Control or
certificate associated to the FQDN in the URL or it can be the Reporting Task. The certificate can be the digital certificate
certificate of the Certification Authority that was used to issue the associated to the FQDN in the URL or it can be the certificate of the
certificate for the FQDN (Fully Qualified Domain Name) of the target Certification Authority that was used to issue the certificate for
URL (which will be retrieved later on using a communication protocol the FQDN (Fully Qualified Domain Name) of the target URL (which will
such as TLS). In order to establish a secure channel, the MA will be retrieved later on using a communication protocol such as TLS).
use it's own security credentials (in the Configuration Information) In order to establish a secure channel, the MA will use it's own
and the given credentials for the individual Channel end-point. security credentials (in the Configuration Information) and the given
credentials for the individual Channel end-point.
As with theTask Configurations, each Channel is also given a text As with the Task Configurations, each Channel is also given a text
name by which it can be referenced from a Task Configuration. name by which it can be referenced as a Task Option.
Although the same in terms of information, Channels used for Although the same in terms of information, Channels used for
communication with the Controller are refered to as Control Channels communication with the Controller are referred to as Control Channels
whereas Channels to Collectors are refered to as Report Channels. whereas Channels to Collectors are referred to as Report Channels.
Hence Control Channels will be referenced from Control Tasks executed Hence Control Channels will be referenced from Control Tasks executed
by a Control Schedule, whereas Report Channels will be referenced by a Control Schedule, whereas Report Channels will be referenced
from within Reporting Tasks executed by an Instruction Schedule. from within Reporting Tasks executed by an Instruction Schedule.
Multiple interfaces are also supported. For example the Controller Multiple interfaces are also supported. For example the Reporting
could choose to receive some results over GPRS. This is especially Task could be configured to send some results over GPRS. This is
useful when such results indicate the loss of connectivity on a especially useful when such results indicate the loss of connectivity
different network interface. on a different network interface.
Example: A Channel using for reporting results may specify that Example: A Channel using for reporting results may specify that
results are to be sent to the URL (https://collector.foo.org/ results are to be sent to the URL (https://collector.foo.org/
report/), using the appropriate digital certificate to establish a report/), using the appropriate digital certificate to establish a
secure channel.. secure channel..
// Channel object with name string allowing reference from Schedule. // Channel object with name string allowing reference.
// Contains channel endpoint target URL and security credentials // Contains channel endpoint target URL and security credentials
// to establish secure channel. Optionally allows interface // to establish secure channel. Optionally allows interface
// specification (by interface name string reference) // specification (by interface name string reference)
// and connection when no data is pending for transfer
object { object {
string ma-channel-name; string ma-channel-name;
url ma-channel-target; url ma-channel-target;
credentials ma-channel-credentials; credentials ma-channel-credentials;
[string ma-channel-interface-name;] [string ma-channel-interface-name;]
} ma-channel-obj; } ma-channel-obj;
3.7.3. Task Configurations 3.7.3. Task Configurations
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A Measurement Task Configuration is the same in information terms to A Measurement Task Configuration is the same in information terms to
any other Task Configuration. Both measurement and non-measurement any other Task Configuration. Both measurement and non-measurement
Tasks have a registry entry to enable the MA to uniquely identify the Tasks have a registry entry to enable the MA to uniquely identify the
Task it should execute and retrieve the schema for any parameters Task it should execute and retrieve the schema for any parameters
that may be passed to the Task. This registry entry is specified as that may be passed to the Task. This registry entry is specified as
a URI and can therefore be used to identify the Task within a a URI and can therefore be used to identify the Task within a
namespace or point to a web or local file location for the Task namespace or point to a web or local file location for the Task
information. As mentioned previously this entry may be used to information. As mentioned previously this entry may be used to
identify the Measurement Task in a public namespace identify the Measurement Task in a public namespace
[I-D.bagnulo-ippm-new-registry] . [I-D.ietf-ippm-metric-registry] .
Example: A Measurement Task Configuration may configure a single Example: A Measurement Task Configuration may configure a single
Measurement Task for measuring UDP latency. The Measurement Task Measurement Task for measuring UDP latency. The Measurement Task
Configuration could define the destination port and address for Configuration could define the destination port and address for
the measurement as well as the duration, internal packet timing the measurement as well as the duration, internal packet timing
strategy and other parameters (for example a stream for one hour strategy and other parameters (for example a stream for one hour
and sending one packet every 500 ms). It may also define the and sending one packet every 500 ms). It may also define the
output type and possible parameters (for example the output type output type and possible parameters (for example the output type
can be the 95th percentile mean) where the measurement task can be the 95th percentile mean) where the measurement task
accepts such parameters. It does not define when the task starts accepts such parameters. It does not define when the task starts
(this is defined by the Schedule element), so it does not by (this is defined by the Schedule element), so it does not by
itself instruct the MA to actually perform this Measurement Task. itself instruct the MA to actually perform this Measurement Task.
The Task Configuration will include a local short name for reference The Task Configuration will include a local short name for reference
by a Schedule. Task Configurations will also contain a registry by a Schedule. Task Configurations will also contain a registry
entry as described above. In addition the Task can be configured entry as described above. In addition the Task can be configured
through a set of configuration Options. The nature and number of through a set of configuration Options. The nature and number of
these Options will depend upon the Task and will be resolved through these Options will depend upon the Task. These options are expressed
the registry parameter. These options are expressed as name-value as name-value pairs although the 'value' may be a structured object
pairs although the 'value' may be a structured object instead of a instead of a simple string or numeric value. The implementation of
simple string or numeric value. The implementation of these name- these name-value pairs will vary between data models such as JSON,
value pairs will vary between data models such as JSON, XML or TR- XML or TR-069.
069.
A parameter that must be present for Reporting Tasks is the Channel A Option that must be present for Reporting Tasks is the Channel
reference specifying how to communicate with a Collector. This is reference specifying how to communicate with a Collector. This is
included in the task options and will have a value that matches a included in the task options and will have a value that matches a
channel name that has been defined in the Instruction. Similarly channel name that has been defined in the Instruction. Similarly
Control Tasks will have a simialr option with the value set to a Control Tasks will have a similar option with the value set to a
specified Control Channel. specified Control Channel.
A reporting task might also have a flag parameter to indicate whether A reporting task might also have a flag parameter to indicate whether
to report if there is no measurement result data pending to be to report if there is no measurement result data pending to be
transferred to the Collector. In addition many tasks will also take transferred to the Collector. In addition many tasks will also take
as a parameter which interface to operate over. as a parameter which interface to operate over.
The Task Configuration also contains a suppress-by-default flag that The Task Configuration also contains a suppress-by-default flag that
specifies the behaviour of a default suppress instruction (that does specifies the behaviour of a default suppress instruction (that does
not list explicit tasks or schedules). If this flag is set to FALSE not list explicit tasks or schedules). If this flag is set to FALSE
skipping to change at page 24, line 13 skipping to change at page 24, line 27
mean that two sets of results should not be directly compared. mean that two sets of results should not be directly compared.
// Task Configuration object with string name to allow reference // Task Configuration object with string name to allow reference
// from Schedule. Contains URI to link to registry or local // from Schedule. Contains URI to link to registry or local
// specification of the Task. Options allow the configuration // specification of the Task. Options allow the configuration
// of Task parameters (in the form of name-value pairs) // of Task parameters (in the form of name-value pairs)
object { object {
string ma-task-name; string ma-task-name;
uri ma-task-registry-entry; uri ma-task-registry-entry;
[name-value-pair ma-task-options<0..*>]; [ma-task-option ma-task-options<0..*>];
[boolean ma-task-suppress-by-default;] // default: TRUE [boolean ma-task-suppress-by-default;] // default: TRUE
[string ma-task-cycle-id;] [string ma-task-cycle-id;]
} ma-task-obj; } ma-task-obj;
While many of the Task Configuration Options are left to individual
tasks to define, some common Options are used by multiple tasks and
benefit from standardisation. These Options are Channel and Role.
Channel is used to specify the details of an endpoint for Control or
Reporting Task communications and is detailed elsewhere in this
document.
Role is used to specify which Role the task should be performing (as
defined in the registry) if multiple roles are available.
// General Task Option
object {
string ma-option-name;
object ma-option-value;
} ma-task-option
// Channel Option
oobject {
string ma-option-name; // set to "channel"
string ma-option-value; // set to ma-channel-name reference
} ma-task-option
// Role Option
object {
string ma-option-name; // set to "role"
string ma-option-value; // set to registry role reference
} ma-task-option
3.7.4. Timing Information 3.7.4. Timing Information
The Timing information object used throughout the information models The Timing information object used throughout the information models
can take one of five different forms: can take one of five different forms:
1. Periodic. Specifies a start, end and interval time in 1. Periodic. Specifies a start, end and interval time in
milliseconds milliseconds
2. Calendar: Specifies a calendar based pattern - e.g. 22 minutes 2. Calendar: Specifies a calendar based pattern - e.g. 22 minutes
past each hour of the day on weekdays past each hour of the day on weekdays
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This randomness parameter defines a uniform interval in milliseconds This randomness parameter defines a uniform interval in milliseconds
over which the start of the task is delayed from the starting times over which the start of the task is delayed from the starting times
specified by the timing object. specified by the timing object.
Both the Periodic and Calendar timing objects allow for a series of Both the Periodic and Calendar timing objects allow for a series of
tasks to be executed. While both have an optional end time, it is tasks to be executed. While both have an optional end time, it is
best practice to always configure an end time and refresh the best practice to always configure an end time and refresh the
information periodically to ensure that lost MAs do not continue information periodically to ensure that lost MAs do not continue
their tasks forever. their tasks forever.
Starup timing is only excuted on device startup - not when a new Starup timing is only executed on device startup - not when a new
Instruction is transferred to the MA. If scheduled task execution is Instruction is transferred to the MA. If scheduled task execution is
desired both on the transfer of the Instruction and on device restart desired both on the transfer of the Instruction and on device restart
then both the Immediate and Starup timing needs to be used in then both the Immediate and Startup timing needs to be used in
conjunction. conjunction.
The datetime format used for all elements in the information model The datetime format used for all elements in the information model
MUST conform to RFC 3339 [RFC3339]. MUST conform to RFC 3339 [RFC3339].
// Main Timing object with name string to allow reference by Schedule // Main Timing object with name string to allow reference by Schedule
// Must be specialised by one of the Timing options. // Must be specialised by one of the Timing options.
// Includes optional uniform random spread in ms from start time // Includes optional uniform random spread in ms from start time
// given by Timing specialisation // given by Timing specialisation
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This Information Model deals with information about the control and This Information Model deals with information about the control and
reporting of the Measurement Agent. There are broadly two security reporting of the Measurement Agent. There are broadly two security
considerations for such an Information Model. Firstly the considerations for such an Information Model. Firstly the
Information Model has to be sufficient to establish secure Information Model has to be sufficient to establish secure
communication channels to the Controller and Collector such that communication channels to the Controller and Collector such that
other information can be sent and received securely. Additionally, other information can be sent and received securely. Additionally,
any mechanisms that the Network Operator or other device any mechanisms that the Network Operator or other device
administrator employs to pre-configure the MA must also be secure to administrator employs to pre-configure the MA must also be secure to
protect unauthorized parties from modifying pre-configuration protect unauthorized parties from modifying pre-configuration
information. These mechanisms are important to ensure that the MA information. These mechanisms are important to ensure that the MA
cannot be hijacked, for example to particpate in a DDoS attack. cannot be hijacked, for example to participate in a DDoS attack.
The second consideration is that no mandated information items should The second consideration is that no mandated information items should
pose a risk to confidentiality or privacy given such secure pose a risk to confidentiality or privacy given such secure
communication channels. For this latter reason items such as the MA communication channels. For this latter reason items such as the MA
context and MA ID are left optional and can be excluded from some context and MA ID are left optional and can be excluded from some
deployments. This would, for example, allow the MA to remain deployments. This would, for example, allow the MA to remain
anonymous and for information about location or other context that anonymous and for information about location or other context that
might be used to identify or track the MA to be omitted or blurred. might be used to identify or track the MA to be omitted or blurred.
The Information Model should support wherever relevant, all the The Information Model should support wherever relevant, all the
skipping to change at page 28, line 28 skipping to change at page 29, line 38
[FP7/2007-2013] under grant agreement number 317647. [FP7/2007-2013] under grant agreement number 317647.
7. References 7. References
7.1. Normative References 7.1. Normative References
[I-D.ietf-lmap-framework] [I-D.ietf-lmap-framework]
Eardley, P., Morton, A., Bagnulo, M., Burbridge, T., Eardley, P., Morton, A., Bagnulo, M., Burbridge, T.,
Aitken, P., and A. Akhter, "A framework for large-scale Aitken, P., and A. Akhter, "A framework for large-scale
measurement platforms (LMAP)", draft-ietf-lmap- measurement platforms (LMAP)", draft-ietf-lmap-
framework-03 (work in progress), January 2014. framework-10 (work in progress), January 2015.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997. Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3339] Klyne, G., Ed. and C. Newman, "Date and Time on the [RFC3339] Klyne, G., Ed. and C. Newman, "Date and Time on the
Internet: Timestamps", RFC 3339, July 2002. Internet: Timestamps", RFC 3339, July 2002.
7.2. Informative References 7.2. Informative References
[I-D.bagnulo-ippm-new-registry] [I-D.ietf-ippm-metric-registry]
Bagnulo, M., Burbridge, T., Crawford, S., Eardley, P., and Bagnulo, M., Claise, B., Eardley, P., Morton, A., and A.
A. Morton, "A registry for commonly used metrics", draft- Akhter, "Registry for Performance Metrics", draft-ietf-
bagnulo-ippm-new-registry-01 (work in progress), July ippm-metric-registry-01 (work in progress), September
2013. 2014.
[I-D.schoenw-lmap-yang]
Schoenwaelder, J. and V. Bajpai, "A YANG Data Model for
LMAP Measurement Agents", draft-schoenw-lmap-yang-02 (work
in progress), January 2015.
[RFC3444] Pras, A. and J. Schoenwaelder, "On the Difference between [RFC3444] Pras, A. and J. Schoenwaelder, "On the Difference between
Information Models and Data Models", RFC 3444, January Information Models and Data Models", RFC 3444, January
2003. 2003.
Appendix A. JSON Data Model Example Appendix A. JSON Data Model Example
In order to give an example of data in the Information Model we need In order to give an example of data in the Information Model we need
to select a data model language. In this example we have expressed to select a data model language. In the following example we have
the Data Model using JSON as this will be of direct interest to some expressed the Data Model using JSON as this will be of direct
Control and Report Protocols. The example is broken down into a interest to some Control and Report Protocols. A YANG data model
number of different steps that might adhere to the steps within a implementation of the Information Model is provided in a separate
Control and Report Protocol: draft [I-D.schoenw-lmap-yang].
The example is broken down into a number of different steps that
might adhere to the steps within a Control and Report Protocol:
1. Pre-configuration. 1. Pre-configuration.
2. Configuration 2. Configuration
3. Capabilities 3. Capabilities
4. Instruction 4. Instruction
5. Report 5. Report
skipping to change at page 36, line 39 skipping to change at page 37, line 39
"ma-report-task-rows": "ma-report-task-rows":
["2014-06-09T02:30:10+00:00", "", "0", ["2014-06-09T02:30:10+00:00", "", "0",
"20.13", "18.3", "24.1"] "20.13", "18.3", "24.1"]
} }
] ]
} }
} }
The Controller decides that there is a problem with the UDP L:atency The Controller decides that there is a problem with the UDP L:atency
test and issues a Suppression Instruction. Since the task is marked test and issues a Suppression Instruction. Since the task is marked
as suppressable by default, simply turning on suppression will stop as suppressible by default, simply turning on suppression will stop
the task being executed in future. the task being executed in future.
// Suppression // Suppression
{ {
"ma-instruction": { "ma-instruction": {
"ma-suppression": { "ma-suppression": {
"ma-suppression-enabled": "TRUE" "ma-suppression-enabled": "TRUE"
} }
} }
 End of changes. 55 change blocks. 
121 lines changed or deleted 182 lines changed or added

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