Network Working Group J. Schoenwaelder Internet-Draft V. Bajpai Intended status: Standards Track Jacobs University Bremen Expires: May 4, 2016 November 1, 2015 A YANG Data Model for LMAP Measurement Agents draft-ietf-lmap-yang-02.txt Abstract This document defines a data model for Large-Scale Measurement Platforms (LMAP). The data model is defined using the YANG data modeling language. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on May 4, 2016. Copyright Notice Copyright (c) 2015 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 1] Internet-Draft LMAP Data Model November 2015 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2 1.2. Tree Diagrams . . . . . . . . . . . . . . . . . . . . . . 2 2. Data Model Overview . . . . . . . . . . . . . . . . . . . . . 3 3. Relationship to the Information Model . . . . . . . . . . . . 6 4. YANG Modules . . . . . . . . . . . . . . . . . . . . . . . . 7 5. Security Considerations . . . . . . . . . . . . . . . . . . . 33 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 33 7. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 34 8. References . . . . . . . . . . . . . . . . . . . . . . . . . 34 8.1. Normative References . . . . . . . . . . . . . . . . . . 34 8.2. Informative References . . . . . . . . . . . . . . . . . 35 Appendix A. Open Issues . . . . . . . . . . . . . . . . . . . . 35 Appendix B. Non-editorial Changes since -01 . . . . . . . . . . 36 Appendix C. Non-editorial Changes since -00 . . . . . . . . . . 36 Appendix D. Example Configuration (XML) . . . . . . . . . . . . 37 Appendix E. Example Configuration (JSON) . . . . . . . . . . . . 40 Appendix F. Example State (XML) . . . . . . . . . . . . . . . . 44 Appendix G. Example State (JSON) . . . . . . . . . . . . . . . . 45 Appendix H. Example Report (XML) . . . . . . . . . . . . . . . . 47 Appendix I. Example Report (JSON) . . . . . . . . . . . . . . . 50 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 54 1. Introduction This document defines a data model for Large-Scale Measurement Platforms (LMAP) [RFC7594]. The data model is defined using the YANG [RFC6020] data modeling language. It aims to be consistent with the LMAP Information Model [I-D.ietf-lmap-information-model]. 1.1. Terminology This document uses the LMAP terminology defined in [RFC7594]. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. 1.2. Tree Diagrams A simplified graphical representation of the data model is used in this document. The meaning of the symbols in these diagrams is as follows: o Brackets "[" and "]" enclose list keys. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 2] Internet-Draft LMAP Data Model November 2015 o Abbreviations before data node names: "rw" means configuration (read-write), "ro" means state data (read-only), and "w" means RPC input date (write-only). o Symbols after data node names: "?" means an optional node, "!" means a presence container, and "*" denotes a list and leaf-list. o Parentheses enclose choice and case nodes, and case nodes are also marked with a colon (":"). o Ellipsis ("...") stands for contents of subtrees that are not shown. 2. Data Model Overview The tree diagram below shows the structure of the configuration data model. module: ietf-lmap-control +--rw lmap +--rw agent | +--rw agent-id? yang:uuid | +--rw device-id? inet:uri | +--rw group-id? string | +--rw measurement-point? string | +--rw report-agent-id? boolean | +--rw report-measurement-point? boolean | +--rw controller-timeout? uint32 +--rw schedules | +--rw schedule* [name] | +--rw name string | +--rw event -> /lmap/events/event/name | +--rw action* [name] | | +--rw name string | | +--rw task -> /lmap/tasks/task/name | | +--rw option* [name] | | | +--rw name string | | | +--rw value? string | | +--rw destination* -> /lmap/schedules/schedule/name | | +--rw suppression-tag* lmap-common:tag-type | +--rw execution-mode? enumeration | +--rw suppression-tag* lmap-common:tag-type +--rw suppressions | +--rw suppression* [name] | +--rw name string | +--rw start? -> /lmap/events/event/name | +--rw end? -> /lmap/events/event/name Schoenwaelder & Bajpai Expires May 4, 2016 [Page 3] Internet-Draft LMAP Data Model November 2015 | +--rw tag* union | +--rw stop-running? boolean +--rw tasks | +--rw task* [name] | +--rw name string | +--rw metric* [uri] | | +--rw uri inet:uri | | +--rw role* string | +--rw program? string | +--rw option* [name] | | +--rw name string | | +--rw value? string | +--rw tag* string | +--rw suppress-by-default? boolean +--rw events +--rw event* [name] +--rw name string +--rw (event-type)? | +--:(periodic) | | +--rw periodic | | +--rw interval uint32 | | +--rw start? yang:date-and-time | | +--rw end? yang:date-and-time | +--:(calendar) | | +--rw calendar | | +--rw month* union | | +--rw weekday* union | | +--rw day-of-month* union | | +--rw hour* union | | +--rw minute* union | | +--rw second* union | | +--rw timezone-offset? lmap-common:timezone-offset | | +--rw start? yang:date-and-time | | +--rw end? yang:date-and-time | +--:(one-off) | | +--rw one-off-time yang:date-and-time | +--:(immediate) | | +--rw immediate empty | +--:(startup) | | +--rw startup empty | +--:(controller-lost) | | +--rw controller-lost empty | +--:(controller-ok) | +--rw controller-ok empty +--rw random-spread? int32 The tree diagram below shows the structure of the state data model. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 4] Internet-Draft LMAP Data Model November 2015 module: ietf-lmap-control +--ro lmap-state +--ro agent | +--ro agent-id yang:uuid | +--ro device-id inet:uri | +--ro hardware string | +--ro firmware string | +--ro version string | +--ro last-started yang:date-and-time +--ro tasks | +--ro task* [name] | +--ro name string | +--ro metric* [uri] | | +--ro uri inet:uri | | +--ro role* string | +--ro version? string | +--ro program? string +--ro schedules +--ro schedule* [name] +--ro name string +--ro state? enumeration +--ro last-invocation? yang:date-and-time +--ro action* [name] +--ro name string +--ro state? enumeration +--ro last-invocation? yang:date-and-time +--ro last-completion? yang:date-and-time +--ro last-status? lmap-common:status-code +--ro last-message? string +--ro last-failed-completion? yang:date-and-time +--ro last-failed-status? lmap-common:status-code +--ro last-failed-message? string The tree diagram below shows the structure of the reporting data model. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 5] Internet-Draft LMAP Data Model November 2015 module: ietf-lmap-report rpcs: +---x report +---w input +---w date yang:date-and-time +---w agent-id? yang:uuid +---w group-id? string +---w measurement-point? string +---w task* [name] +---w name string +---w metric* [uri] | +---w uri inet:uri | +---w role* string +---w option* [name] | +---w name string | +---w value? string +---w tag* string +---w header | +---w column* string +---w row* +---w start yang:date-and-time +---w end? yang:date-and-time +---w conflict* string +---w value* string 3. Relationship to the Information Model The LMAP information model [I-D.ietf-lmap-information-model] is devided into six sections. They are mapped into the YANG data model as explained below: o Pre-Configuration Information: This is not modeled explicitly since it is a subset of the configuration information. o Configuration Information: This is modeled in the /lmap/agent subtree, the /lmap/schedules subtree, and the /lmap/tasks subtree described below. Some items have been left out because they are expected to be dealt with by the underlying protocol. o Instruction Information: This is modeled in the /lmap/suppressions subtree, the /lmap/schedules subtree, and the /lmap/tasks subtree described below. o Logging Information: Some of the logging information, in particular 'success/failure/warning messages in response to information updates from the Controller', will be handled by the protocol used to manipulate the lmap specific configuration. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 6] Internet-Draft LMAP Data Model November 2015 [[CREF1: It needs to be discussed whether we can rely on informal syslog messages that can be accessed via protocols such RFC 5277 or whether we want to define specific notifications in the YANG data model. --JS]] o Capability and Status Information: Some of the status information is modeled in the /lmap-state/agent subtree and teh /lmap-state/ schedules subtree. Information about network interfaces can be obtained from the interfaces YANG data model [RFC7223]. The list of supported tasks is modeled in the /lmap-state/tasks subtree. o Reporting Information: This is modeled by the report data model to be implemented by the Collector. Measurement Agents send results to the Collector via an RPC operation. These six sections are build on the following common information objects: o Schedules: This is modeled in the /lmap/schedules subtree. o Channels: Channels are not modeled since the NETCONF and RESTCONF server configuration data model [I-D.ietf-netconf-server-model] already provides a mechanism to configure NETCONF and RESTCONF server channels. o Task Configurations: This is modeled in the /lmap/tasks subtree. o Event Information: This is modeled in the /lmap/events subtree. 4. YANG Modules The modules import definitions from [RFC6991] and [RFC7223] and they reference [RFC7398]. file "ietf-lmap-common@2015-10-28.yang" module ietf-lmap-common { namespace "urn:ietf:params:xml:ns:yang:ietf-lmap-common"; prefix "lmap-common"; import ietf-yang-types { prefix yang; } import ietf-inet-types { prefix inet; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 7] Internet-Draft LMAP Data Model November 2015 organization "IETF Large-Scale Measurement Platforms Working Group"; contact "WG Web: WG List: Editor: Juergen Schoenwaelder Editor: Vaibhav Bajpai "; description "This module provides common definitions used by the data models written for Large-Scale Measurement Platforms (LMAP). This module defines typedefs and groupings but no schema tree elements."; revision "2015-10-28" { description "Initial version"; reference "RFC XXX: A YANG Data Model for LMAP Measurement Agents"; } /* * Typedefs */ typedef tag-type { type string { length "1..max"; pattern '[^\*].*'; } description "A tag consists of at least one character and a tag is not allowed to start with an asterisk '*'."; // XXX: Does it make sense to have stricter rules, // XXX: e.g., disallow white space? } typedef tag-matchall-type { type string { pattern '\*'; } description "The string containing a single asterisk '*' is used Schoenwaelder & Bajpai Expires May 4, 2016 [Page 8] Internet-Draft LMAP Data Model November 2015 to match all tags."; // XXX: Allow glob-style matching, turning this into a // XXX: tag-match-type? } typedef wildcard { type string { pattern '\*'; } description "A wildcard for calendar scheduling entries."; } typedef weekday { type enumeration { enum sunday { value 0; description "Sunday of the week"; } enum monday { value 1; description "Monday of the week"; } enum tuesday { value 2; description "Tuesday of the week"; } enum wednesday { value 3; description "Wednesday of the week"; } enum thursday { value 4; description "Thursday of the week"; } enum friday { value 5; description "Friday of the week"; } enum saturday { value 6; description "Saturday of the week"; } } description "A type modeling the weekdays in the Greco-Roman tradition."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 9] Internet-Draft LMAP Data Model November 2015 typedef month { type enumeration { enum january { value 1; description "January of the Julian and Gregorian calendar"; } enum february { value 2; description "February of the Julian and Gregorian calendar"; } enum march { value 3; description "March of the Julian and Gregorian calendar"; } enum april { value 4; description "April of the Julian and Gregorian calendar"; } enum may { value 5; description "May of the Julian and Gregorian calendar"; } enum june { value 6; description "June of the Julian and Gregorian calendar"; } enum july { value 7; description "July of the Julian and Gregorian calendar"; } enum august { value 8; description "August of the Julian and Gregorian calendar"; } enum september { value 9; description "September of the Julian and Gregorian calendar"; } enum october { value 10; description "October of the Julian and Gregorian calendar"; } enum november { value 11; description "November of the Julian and Gregorian calendar"; } enum december { value 12; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 10] Internet-Draft LMAP Data Model November 2015 description "December of the Julian and Gregorian calendar"; } } description "A type modeling the month in the Julian and Gregorian tradition."; } typedef status-code { type int32; description "A status code returned by the execution of a task. Note that the actual range is implementation dependent but it should be portable to use values in the range 0..127 for regular exit codes. By convention, 0 indicates successful termination. Negative values may be used to indicate abnormal termination due to a signal; the absolute value may identify the signal number in this case."; } typedef timezone-offset { type string { pattern 'Z|[\+\-]\d{2}:\d{2}'; } description "A timezone-offset as it is use in the yang:date-and-time type. The value Z is equivalent to +00:00. The value -00:00 indicates and unknown time-offset."; } /* * Groupings */ grouping metrics-grouping { description "This grouping models a list of entry in a metrics registry."; list metric { key uri; description "A list of entries in a metrics registry."; leaf uri { type inet:uri; description "A URI identifying an entry in a metrics registry."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 11] Internet-Draft LMAP Data Model November 2015 leaf-list role { type string; description "A set of roles for this metrics."; } } } grouping task-options-grouping { description "A list of options of a task. Each option is a name/value pair (where the value may be absent)."; list option { key "name"; ordered-by user; description "A list of options passed to the task. It is a list of key / value pairs and may be used to model options. Options may be used to identify the role of a task or to pass a channel name to a task."; // XXX This is kind of broken since making the option name // XXX a key means that a certain option may only appear once. // XXX This is not workable since some tests require a list of // XXX targets. Turning this into a leaf-list of args also // XXX does not work since YANG requires leaf-list values to // XXX be unique. Oops. leaf name { type string; description "The name of the option."; } leaf value { type string; description "The value of the option."; } } } } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 12] Internet-Draft LMAP Data Model November 2015 file "ietf-lmap-control@2015-10-28.yang" module ietf-lmap-control { namespace "urn:ietf:params:xml:ns:yang:ietf-lmap-control"; prefix "lmap-control"; import ietf-yang-types { prefix yang; } import ietf-inet-types { prefix inet; } import ietf-lmap-common { prefix lmap-common; } organization "IETF Large-Scale Measurement Platforms Working Group"; contact "WG Web: WG List: Editor: Juergen Schoenwaelder Editor: Vaibhav Bajpai "; description "This module defines a data model for controlling measurement agents that are part of a Large-Scale Measurement Platform (LMAP). This data model is expected to be implemented by a measurement agent."; revision "2015-10-28" { description "Initial version"; reference "RFC XXX: A YANG Data Model for LMAP Measurement Agents"; } /* * Groupings */ grouping timing-start-end-grouping { description Schoenwaelder & Bajpai Expires May 4, 2016 [Page 13] Internet-Draft LMAP Data Model November 2015 "A grouping that provides start and end times for timing objects."; leaf start { type yang:date-and-time; description "The date and time when the timing object starts to create triggers."; } leaf end { type yang:date-and-time; description "The date and time when the timing object stops to create triggers. It is generally a good idea to always configure an end time and to refresh the configuration of timing object as needed to ensure that agents that loose connectivity to their controller do not continue their tasks forever."; } } /* * Configuration data nodes */ container lmap { description "Configuration of the LMAP agent."; /* * Common Information Objects: Configuration */ container agent { description "Configuration of parameters affecting the whole measurement agent."; leaf agent-id { type yang:uuid; description "The agent-id identifies a measurement agent with a very low probability of collision. In certain deployments, the agent-id may be considered sensitive and hence this object is optional."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 14] Internet-Draft LMAP Data Model November 2015 leaf device-id { type inet:uri; description "The device-id identifies a property of the device running the measurement agent. In certain deployments, the device-id may be considered sensitive and hence this object is optional."; } leaf group-id { type string; description "The group-id identifies a group of measurement agents. In certain deployments, the group-id may be considered less sensitive than the agent-id."; } leaf measurement-point { type string; description "The measurement point indicating where the measurement agent is located on a path."; reference "RFC 7398: A Reference Path and Measurement Points for Large-Scale Measurement of Broadband Performance"; } leaf report-agent-id { type boolean; must "../agent-id" { description "An agent-id must exist for this to be set."; } description "The 'report-agent-id' controls whether the 'agent-id' is reported to collectors if the 'group-id' is configured. If the 'group-id' is not configured, the agent-id is always reported."; } leaf report-measurement-point { type boolean; must "../measurement-point" { description "A measurement-point must exist for this to be set."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 15] Internet-Draft LMAP Data Model November 2015 } description "The 'report-measurement-point' controls whether the 'measurement-point' is reported to collectors if the 'measurement-point' is configured."; } leaf controller-timeout { type uint32; units "seconds"; description "A timer is started after each successful contact with a controller. When the timer reaches the controller-timeout, an event is raised indicating that connectivity to the controller has been lost."; } } /* * Common Information Objects: Schedules */ container schedules { description "Configuration of LMAP schedules. Schedules control which tasks are executed by the LMAP implementation."; list schedule { key name; description "Configuration of a particular schedule."; leaf name { type string; description "The locally-unique, administratively assigned name for this schedule."; } leaf event { type leafref { path "/lmap/events/event/name"; } mandatory true; description "The event source controlling the start of the scheduled tasks."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 16] Internet-Draft LMAP Data Model November 2015 list action { key name; description "An action describes a task that is invoked by the schedule. Multiple actions are invoked sequentially."; leaf name { type string; description "The unique identifier for this action."; } leaf task { type leafref { path "/lmap/tasks/task/name"; } mandatory true; description "The tasks invoked by this action."; } uses lmap-common:task-options-grouping { description "The list of action specific options that are appended to the list of task specific options."; } leaf-list destination { type leafref { path "/lmap/schedules/schedule/name"; } description "A schedule of receiving the output produced by this action. A queue is internally used to pass results to another schedule. The behaviour of an action passing data to its own schedule is implementation specific. Data passed to a sequential or pipelined schedule is consumed by the schedule's first action. Data passed to a parallel schedule is consumed by all actions of the schedule."; } leaf-list suppression-tag { type lmap-common:tag-type; description "A list of suppression tags."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 17] Internet-Draft LMAP Data Model November 2015 } } leaf execution-mode { type enumeration { enum sequential { value 1; description "The actions of the schedule are executed sequentially."; } enum parallel { value 2; description "The actions of the schedule are executed concurrently"; } enum pipelined { value 3; description "The actions of the schedule are executed in a pipelined mode. Output created by an action is passed as input to the subsequent action."; } } default pipelined; description "The execution mode of this schedule determins in which order the actions of the schedule are executed."; } leaf-list suppression-tag { type lmap-common:tag-type; description "A list of suppression tags."; } } } /* * Suppression */ container suppressions { description "Suppression information to prevent schedules or certain actions from starting."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 18] Internet-Draft LMAP Data Model November 2015 list suppression { key name; description "Configuration of a particular suppression."; leaf name { type string; description "The locally-unique, administratively assigned name for this suppression."; } leaf start { type leafref { path "/lmap/events/event/name"; } description "The event source controlling the start of the suppression period."; } leaf end { type leafref { path "/lmap/events/event/name"; } description "The event source controlling the end of the suppression period. If not present, supression continues indefinitely."; } leaf-list tag { type union { type lmap-common:tag-type; type lmap-common:tag-matchall-type; } description "A list of suppression tags. The suppression will apply to all schedules (and their actions) that have a matching value in their suppression-tags and to all actions that have a matching value in their suppression-tags."; } leaf stop-running { type boolean; default false; description Schoenwaelder & Bajpai Expires May 4, 2016 [Page 19] Internet-Draft LMAP Data Model November 2015 "Setting 'stop-running' to true will cause running tasks to be terminated if suppression is activated. Otherwise, running tasks will not be affected if suppression is activated."; } } } /* * Common Information Objects: Task Configurations */ container tasks { description "Configuration of LMAP tasks."; list task { key name; description "The list of tasks configured on the LMAP agent."; leaf name { type string; description "The unique name of a task."; } uses lmap-common:metrics-grouping; leaf program { type string; description "The (local) program to invoke in order to execute the task."; } uses lmap-common:task-options-grouping { description "The list of task specific options."; } leaf-list tag { type string; description "A tag contains additional information that is passed with the result record to the collector. A tag can be used to carry the Measurement Cycle ID."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 20] Internet-Draft LMAP Data Model November 2015 leaf suppress-by-default { type boolean; default true; description "Indicates whether the task will be suppressed by a default supression."; } } } /* * Common Information Objects: Event Information */ container events { description "Configuration of LMAP events. Implementations may be forced to delay acting upon the occurance of events in the face of local constraints. An action triggered by an event therefore should not rely on the accuracy provided by the scheduler implementation."; list event { key name; description "The list of event sources configured on the LMAP agent."; leaf name { type string; description "The unique name of an event source."; } choice event-type { description "Different types of events are handled by different branches of this choice. Note that this choice can be extended via augmentations."; case periodic { container periodic { description "A periodic timing object triggers periodically according to a regular interval."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 21] Internet-Draft LMAP Data Model November 2015 leaf interval { type uint32; units "milliseconds"; mandatory true; description "The number of milliseconds between two triggers generated by this periodic timing object. The execution system must not generate triggers for periodic timing objects that have a interval value of 0. A periodic timing object with an interval of 0 milliseconds will therefore never trigger."; } uses timing-start-end-grouping; } } case calendar { container calendar { description "A calendar timing object triggers based on the current calendar date and time."; leaf-list month { type union { type lmap-common:month; type lmap-common:wildcard; } description "A month at which this calendar timing will trigger. The wildcard means all months."; } leaf-list weekday { type union { type lmap-common:weekday; type lmap-common:wildcard; } description "A weekday at which this calendar timing will trigger. The wildcard means all weekdays."; } leaf-list day-of-month { type union { type int8 { range "-31..-1 | 1..31"; } type lmap-common:wildcard; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 22] Internet-Draft LMAP Data Model November 2015 } description "A day in the month at which this calendar timing will trigger. Negative numbers indicate days counted backwards from the end of the months. The wildcard means all days of a month."; } leaf-list hour { type union { type int8 { range "0..23"; } type lmap-common:wildcard; } description "An hour at which this calendar timing will trigger. The wildcard means all hours of a day."; } leaf-list minute { type union { type int8 { range "0..59"; } type lmap-common:wildcard; } description "A minute at which this calendar timing will trigger. The wildcard means all minutes of an hour."; } leaf-list second { type union { type int8 { range "0..59"; } type lmap-common:wildcard; } description "A second at which this calendar timing will trigger. The wildcard means all seconds of a minute."; } leaf timezone-offset { type lmap-common:timezone-offset; description "The timezone in which this calendar timing object will be evaluated."; } uses timing-start-end-grouping; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 23] Internet-Draft LMAP Data Model November 2015 } case one-off { leaf one-off-time { type yang:date-and-time; mandatory true; description "This one-off timing object triggers once at the configured one-off-time."; } } case immediate { leaf immediate { type empty; mandatory true; description "This immediate event object triggers immediately when it is configured."; } } case startup { leaf startup { type empty; mandatory true; description "This startup event object triggers whenever the LMAP agent (re)starts."; } } case controller-lost { leaf controller-lost { type empty; mandatory true; description "The controller-lost event object triggers when the connectivity to the controller has been lost for at least 'controller-timeout' seconds."; } } case controller-ok { leaf controller-ok { type empty; mandatory true; description Schoenwaelder & Bajpai Expires May 4, 2016 [Page 24] Internet-Draft LMAP Data Model November 2015 "The controller-ok event object triggers when the connectivity to the controller has been restored after it was lost for at least 'controller-timeout' seconds."; } } } leaf random-spread { type int32; units milliseconds; description "This optional leaf adds a random spread to the computation of the trigger."; } } } } /* * The state subtree provides information about the capabilities * and the current status of the MA. */ container lmap-state { config false; description "A tree exporting state information about the LMAP agent."; container agent { description "Operations state of the measurement agent."; leaf agent-id { type yang:uuid; mandatory true; description "The agent-id identifies a measurement agent with a very low probability of collision. In certain deployments, the agent-id may be considered sensitive and hence this object is optional."; } leaf device-id { type inet:uri; mandatory true; description "The device-id identifies a property of the Schoenwaelder & Bajpai Expires May 4, 2016 [Page 25] Internet-Draft LMAP Data Model November 2015 device running the measurement agent. In certain deployments, the device-id may be considered sensitive and hence this object is optional."; } leaf hardware { type string; mandatory true; description "A short description of the hardware the measurement agent is running on. This should include the version number of the hardware"; } leaf firmware { type string; mandatory true; description "A short description of the firmware the measurement agent is running on. This should include the version number of the firmware."; } leaf version { type string; mandatory true; description "A short description of the software implementing the measurement agent. This should include the version number of the measurement agent software."; } leaf last-started { type yang:date-and-time; mandatory true; description "The date and time the measurement agent last started."; } } container tasks { description "Available LMAP tasks, including information about their last execution and their last failed execution."; list task { key name; description "The list of tasks available on the LMAP agent."; leaf name { type string; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 26] Internet-Draft LMAP Data Model November 2015 description "The unique name of a task."; } uses lmap-common:metrics-grouping; leaf version { type string; description "A short description of the software implementing the task. This should include the version number of the measurement task software."; } leaf program { type string; description "The (local) program to invoke in order to execute the task."; } } } container schedules { description "State of LMAP schedules."; list schedule { key name; description "State of a particular schedule."; leaf name { type string; description "The locally-unique, administratively assigned name for this schedule."; } leaf state { type enumeration { enum enabled { value 1; description "The value 'enabled' indicates that the schedule is currently enabled."; } enum disabled { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 27] Internet-Draft LMAP Data Model November 2015 value 2; description "The value 'disabled' indicates that the schedule is currently disabled."; } enum suppressed { value 3; description "The value 'suppressed' indicates that the schedule is currently suppressed."; } } description "The current state of the schedule."; } leaf last-invocation { type yang:date-and-time; description "The date and time of the last invocation of this schedule."; } list action { key name; description "The state of the actions associated with this schedule entry."; leaf name { type string; description "The unique identifier for this action."; } leaf state { type enumeration { enum enabled { value 1; description "The value 'enabled' indicates that the action is currently enabled."; } enum disabled { value 2; description "The value 'disabled' indicates that the action is currently disabled."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 28] Internet-Draft LMAP Data Model November 2015 } enum suppressed { value 3; description "The value 'suppressed' indicates that the action is currently suppressed."; } } description "The current state of the action."; } leaf last-invocation { type yang:date-and-time; description "The date and time of the last invocation of this action."; } leaf last-completion { type yang:date-and-time; description "The date and time of the last completion of this action."; } leaf last-status { type lmap-common:status-code; description "The status code returned by the last execution of this action."; } leaf last-message { type string; description "The status message produced by the last execution of this action."; } leaf last-failed-completion { type yang:date-and-time; description "The date and time of the last failed completion of this action."; } leaf last-failed-status { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 29] Internet-Draft LMAP Data Model November 2015 type lmap-common:status-code; description "The status code returned by the last failed execution of this action."; } leaf last-failed-message { type string; description "The status message produced by the last failed execution of this action."; } } } } } } file "ietf-lmap-report@2015-10-28.yang" module ietf-lmap-report { namespace "urn:ietf:params:xml:ns:yang:ietf-lmap-report"; prefix "lmap-report"; import ietf-yang-types { prefix yang; } import ietf-lmap-common { prefix lmap-common; } organization "IETF Large-Scale Measurement Platforms Working Group"; contact "WG Web: WG List: Editor: Juergen Schoenwaelder Editor: Vaibhav Bajpai "; description Schoenwaelder & Bajpai Expires May 4, 2016 [Page 30] Internet-Draft LMAP Data Model November 2015 "This module defines a data model for reporting results from measurement agents, which are part of a Large-Scale Measurement Platform (LMAP), to result data collectors. This data model is expected to be implemented by a collector."; revision "2015-10-28" { description "Initial version"; reference "RFC XXX: A YANG Data Model for LMAP Measurement Agents"; } rpc report { description "The report operation is used by an LMAP measurement agent to submit measurement results produced by measurement tasks to a collector."; input { leaf date { type yang:date-and-time; mandatory true; description "The date and time when this result report was sent to a collector."; } leaf agent-id { type yang:uuid; description "The agent-id of the agent from which this report originates."; } leaf group-id { type string; description "The group-id of the agent from which this report originates."; } leaf measurement-point { type string; description "The measurement-point of the agent from which this report originates."; } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 31] Internet-Draft LMAP Data Model November 2015 list task { key name; description "The list of tasks for which results are reported."; leaf name { type string; description "The unique name of the task."; } uses lmap-common:metrics-grouping; uses lmap-common:task-options-grouping { description "The list of task options there were in use then the measurement was performed. This list must include both the task specific options as well as the action specific options."; } leaf-list tag { type string; description "A tag contains additional information that is passed with the result record to the collector. A tag can be used to carry the Measurement Cycle ID."; } container header { description "This container lists the column labels. It does not really serve a purpose other than making the result data look nicely structured."; leaf-list column { type string; description "An ordered list of column labels. The order is determined by the system and must match the order of the columns in the result rows."; } } list row { description "The rows of the result record."; Schoenwaelder & Bajpai Expires May 4, 2016 [Page 32] Internet-Draft LMAP Data Model November 2015 leaf start { type yang:date-and-time; mandatory true; description "The date and time when the measurement producing this result row started."; } leaf end { type yang:date-and-time; description "The date and time when the measurement producing this result row stopped."; } leaf-list conflict { type string; description "The name of a task overlapping with the execution of the task that has produced this result record."; } leaf-list value { type string; description "The value of a cell in the result row."; } } } } } } 5. Security Considerations TBD 6. IANA Considerations This document registers a URI in the "IETF XML Registry" [RFC3688]. Following the format in RFC 3688, the following registrations have been made. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 33] Internet-Draft LMAP Data Model November 2015 URI: urn:ietf:params:xml:ns:yang:ietf-lmap-control Registrant Contact: The IESG. XML: N/A; the requested URI is an XML namespace. URI: urn:ietf:params:xml:ns:yang:ietf-lmap-report Registrant Contact: The IESG. XML: N/A; the requested URI is an XML namespace. This document registers a YANG module in the "YANG Module Names" registry [RFC6020]. name: ietf-lmap-common namespace: urn:ietf:params:xml:ns:yang:ietf-lmap-common prefix: lmap-common reference: RFC XXXX name: ietf-lmap-control namespace: urn:ietf:params:xml:ns:yang:ietf-lmap-control prefix: lmap-control reference: RFC XXXX name: ietf-lmap-report namespace: urn:ietf:params:xml:ns:yang:ietf-lmap-report prefix: lmap-report reference: RFC XXXX 7. Acknowledgements Juergen Schoenwaelder and Vaibhav Bajpai worked in part on the Leone research project, which received funding from the European Union Seventh Framework Programme [FP7/2007-2013] under grant agreement number 317647. Juergen Schoenwaelder and Vaibhav Bajpai were partly funded by Flamingo, a Network of Excellence project (ICT-318488) supported by the European Commission under its Seventh Framework Programme. 8. References 8.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/ RFC2119, March 1997, . Schoenwaelder & Bajpai Expires May 4, 2016 [Page 34] Internet-Draft LMAP Data Model November 2015 [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . 8.2. Informative References [I-D.ietf-lmap-information-model] Burbridge, T., Eardley, P., Bagnulo, M., and J. Schoenwaelder, "Information Model for Large-Scale Measurement Platforms (LMAP)", draft-ietf-lmap- information-model-06 (work in progress), July 2015. [I-D.ietf-netconf-server-model] Watsen, K. and J. Schoenwaelder, "NETCONF Server and RESTCONF Server Configuration Models", draft-ietf-netconf- server-model-08 (work in progress), October 2015. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC7223] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 7223, DOI 10.17487/RFC7223, May 2014, . [RFC7398] Bagnulo, M., Burbridge, T., Crawford, S., Eardley, P., and A. Morton, "A Reference Path and Measurement Points for Large-Scale Measurement of Broadband Performance", RFC 7398, DOI 10.17487/RFC7398, February 2015, . [RFC7594] Eardley, P., Morton, A., Bagnulo, M., Burbridge, T., Aitken, P., and A. Akhter, "A Framework for Large-Scale Measurement of Broadband Performance (LMAP)", RFC 7594, DOI 10.17487/RFC7594, September 2015, . Appendix A. Open Issues o The task-options-grouping needs fixing, see the comments inline. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 35] Internet-Draft LMAP Data Model November 2015 Appendix B. Non-editorial Changes since -01 o Updated and split examples (config vs state vs report). o Refactored the definitions so that common definitions used by both the control and report data models are in the new module ietf- lmap-common. o A report is submitted via an RPC operation instead of using a notification. o The default execution mode is pipelined. o Clarified which action consumes data in sequential, pipelines, and parallel execution mode. o Added /lmap/agent/measurement-point, /lmap/agent/report- measurement-point, and /report/measurement-point to configure and report the measurement point. o Turned /lmap/suppression into a list /lmap/suppressions/ suppression that uses a start and stop event to define the beginning and end of a suppression period. o Added controller-lost an controller-ok event choices to /lmap/ events/event. o Added a metrics-grouping to identify entries in a metric registry and associated roles. o Added /lmap-state/schedules to report the status of schedules and their actions. Refactored /lmap-state/tasks to only report the task capabilities. Appendix C. Non-editorial Changes since -00 o A task can now reference multiply registry entries. o Schedules are triggered by Events instead of Timings; Timings are just one of many possible event sources. o Actions feed into other Schedules (instead of Actions within other Schedules). o Removed the notion of multiple task outputs. o Support for sequential, parallel, and pipelined execution of Actions. Schoenwaelder & Bajpai Expires May 4, 2016 [Page 36] Internet-Draft LMAP Data Model November 2015 Appendix D. Example Configuration (XML) 550e8400-e29b-41d4-a716-446655440000 urn:dev:mac:0024befffe804ff1 wireless measurement at the north-pole true hourly-schedule hourly icmp-latency-hourly icmp-latency-measurement daily-schedule udp-latency-weekdays-hourly udp-latency-measurement daily-schedule sequential daily-schedule daily report-daily lmap-reporting-task sequential immediate-schedule immediate Schoenwaelder & Bajpai Expires May 4, 2016 [Page 37] Internet-Draft LMAP Data Model November 2015 icmp-latency-immediate icmp-latency-measurement report-immediate lmap-reporting-task pipelined controller-lost-suppression controller-lost controller-ok * udp-latency-measurement urn:.... source icmp-latency-measurement urn:.... iperf-server /usr/bin/iperf false Schoenwaelder & Bajpai Expires May 4, 2016 [Page 38] Internet-Draft LMAP Data Model November 2015 lmap-reporting-task /usr/bin/lmap-reporter hourly 3600000 2014-09-01T17:44:00+02:00 2015-09-30T00:00:00+02:00 daily 4 once-every-six-hours 0 6 12 18 0 0 2014-09-30T00:00:00+02:00 21600000 immediate startup 12345 controller-lost Schoenwaelder & Bajpai Expires May 4, 2016 [Page 39] Internet-Draft LMAP Data Model November 2015 controller-ok Appendix E. Example Configuration (JSON) { "ietf-lmap-control:lmap": { "agent": { "agent-id": "550e8400-e29b-41d4-a716-446655440000", "device-id": "urn:dev:mac:0024befffe804ff1", "group-id": "wireless measurement at the north-pole", "report-agent-id": true }, "schedules": { "schedule": [ { "name": "hourly-schedule", "event": "hourly", "action": [ { "name": "icmp-latency-hourly", "task": "icmp-latency-measurement", "destination": [ "daily-schedule" ] }, { "name": "udp-latency-weekdays-hourly", "task": "udp-latency-measurement", "destination": [ "daily-schedule" ] } ], "execution-mode": "sequential" }, { "name": "daily-schedule", "event": "daily", "action": [ { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 40] Internet-Draft LMAP Data Model November 2015 "name": "report-daily", "task": "lmap-reporting-task", "option": [ { "name": "channel", "value": "http://collector.example.org/" } ] } ], "execution-mode": "sequential" }, { "name": "immediate-schedule", "event": "immediate", "action": [ { "name": "icmp-latency-immediate", "task": "icmp-latency-measurement" }, { "name": "report-immediate", "task": "lmap-reporting-task", "option": [ { "name": "channel", "value": "http://collector.example.org/" } ] } ], "execution-mode": "pipelined" } ] }, "suppressions": { "suppression": [ { "name": "controller-lost-suppression", "start": "controller-lost", "end": "controller-ok", "tag": [ "*" ] } ] }, "tasks": { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 41] Internet-Draft LMAP Data Model November 2015 "task": [ { "name": "udp-latency-measurement", "metric": [ { "uri": "urn:....", "role": [ "source" ] } ] }, { "name": "icmp-latency-measurement", "metric": [ { "uri": "urn:...." } ] }, { "name": "iperf-server", "program": "/usr/bin/iperf", "option": [ { "name": "role", "value": "server" } ], "suppress-by-default": false }, { "name": "lmap-reporting-task", "program": "/usr/bin/lmap-reporter" } ] }, "events": { "event": [ { "name": "hourly", "periodic": { "interval": 3600000, "start": "2014-09-01T17:44:00+02:00", "end": "2015-09-30T00:00:00+02:00" } }, { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 42] Internet-Draft LMAP Data Model November 2015 "name": "daily", "calendar": { "hour": [ 4 ] } }, { "name": "once-every-six-hours", "calendar": { "hour": [ 0, 6, 12, 18 ], "minute": [ 0 ], "second": [ 0 ], "end": "2014-09-30T00:00:00+02:00" }, "random-spread": 21600000 }, { "name": "immediate", "immediate": [null] }, { "name": "startup", "startup": [null], "random-spread": 12345 }, { "name": "controller-lost", "controller-lost": [null] }, { "name": "controller-ok", "controller-ok": [null] } ] } } } Schoenwaelder & Bajpai Expires May 4, 2016 [Page 43] Internet-Draft LMAP Data Model November 2015 Appendix F. Example State (XML) 550e8400-e29b-41d4-a716-446655440000 urn:dev:mac:0024befffe804ff1 ACME home router OpenWrt version 10.03.1 Measurement Agent Daemon (MAD) 4.2 2015-04-10T17:24:42+02:00 udp-latency-measurement urn:.... source target icmp-latency-measurement urn:.... iperf iperf lmap-reporting-task lmap-reportd hourly-schedule enabled 2015-01-23T12:00:00+01:00 Schoenwaelder & Bajpai Expires May 4, 2016 [Page 44] Internet-Draft LMAP Data Model November 2015 icmp-latency-hourly enabled 2015-01-23T12:00:00+01:00 2015-01-23T12:00:01+01:00 0 OK 2015-01-23T03:00:00+01:00 42 connection timed out udp-latency-weekdays-hourly 2015-01-23T12:00:01+01:00 2015-01-23T12:00:02+01:00 0 OK 2015-01-23T03:00:00+01:00 42 connection timed out Appendix G. Example State (JSON) { "ietf-lmap-control:lmap-state": { "agent": { "agent-id": "550e8400-e29b-41d4-a716-446655440000", "device-id": "urn:dev:mac:0024befffe804ff1", "hardware": "ACME home router", "firmware": "OpenWrt version 10.03.1", "version": "Measurement Agent Daemon (MAD) 4.2", "last-started": "2015-04-10T17:24:42+02:00" }, "tasks": { "task": [ { "name": "udp-latency-measurement", "metric": [ { "uri": "urn:....", "role": [ Schoenwaelder & Bajpai Expires May 4, 2016 [Page 45] Internet-Draft LMAP Data Model November 2015 "source", "target" ] } ] }, { "name": "icmp-latency-measurement", "metric": [ { "uri": "urn:...." } ] }, { "name": "iperf", "program": "iperf" }, { "name": "lmap-reporting-task", "program": "lmap-reportd" } ] }, "schedules": { "schedule": [ { "name": "hourly-schedule", "state": "enabled", "last-invocation": "2015-01-23T12:00:00+01:00", "action": [ { "name": "icmp-latency-hourly", "state": "enabled", "last-invocation": "2015-01-23T12:00:00+01:00", "last-completion": "2015-01-23T12:00:01+01:00", "last-status": 0, "last-message": "OK", "last-failed-completion": "2015-01-23T03:00:00+01:00", "last-failed-status": 42, "last-failed-message": "connection timed out" }, { "name": "udp-latency-weekdays-hourly", "last-invocation": "2015-01-23T12:00:01+01:00", "last-completion": "2015-01-23T12:00:02+01:00", "last-status": 0, "last-message": "OK", Schoenwaelder & Bajpai Expires May 4, 2016 [Page 46] Internet-Draft LMAP Data Model November 2015 "last-failed-completion": "2015-01-23T03:00:00+01:00", "last-failed-status": 42, "last-failed-message": "connection timed out" } ] } ] } } } Appendix H. Example Report (XML) 2015-10-28T13:27:42+02:00 550e8400-e29b-41d4-a716-446655440000 wireless measurement at the north-pole icmp-latency-measurement
target ip rtt-1 rtt-2 rtt-3 rtt-4 rtt-5
2015-03-25T00:00:55+00:00 www.ietf.org 104.20.0.85 14.15 14.14 14.09 14.17 14.51 2015-03-25T00:00:56+00:00 www.google.com 216.58.213.36 Schoenwaelder & Bajpai Expires May 4, 2016 [Page 47] Internet-Draft LMAP Data Model November 2015 12.24 11.99 12.49 11.87 12.45
happy-dns-measurement
target ip name
2015-03-25T00:00:56+00:00 www.ietf.org 2400:cb00:2048:1::6814:55 www.ietf.org.cdn.cloudflare-dnssec.net 2015-03-25T00:00:56+00:00 www.ietf.org 2400:cb00:2048:1::6814:155 www.ietf.org.cdn.cloudflare-dnssec.net 2015-03-25T00:00:56+00:00 www.ietf.org 104.20.1.85 www.ietf.org.cdn.cloudflare-dnssec.net 2015-03-25T00:00:56+00:00 www.ietf.org 104.20.0.85 www.ietf.org.cdn.cloudflare-dnssec.net 2015-03-25T00:00:56+00:00 www.google.com 2a00:1450:4008:800::1012 ber01s08-in-x12.1e100.net 2015-03-25T00:00:56+00:00 Schoenwaelder & Bajpai Expires May 4, 2016 [Page 48] Internet-Draft LMAP Data Model November 2015 www.google.com 216.58.213.36 ber01s15-in-f36.1e100.net
happy-connect-measurement
target port ip time-1 time-2 time-3
2015-03-25T00:00:56+00:00 www.ietf.org 80 2400:cb00:2048:1::6814:55 8164 8019 14066 2015-03-25T00:00:56+00:00 www.ietf.org 80 2400:cb00:2048:1::6814:155 14131 14029 7984 2015-03-25T00:00:56+00:00 www.ietf.org 80 104.20.1.85 13821 13736 7995 2015-03-25T00:00:56+00:00 www.ietf.org 80 Schoenwaelder & Bajpai Expires May 4, 2016 [Page 49] Internet-Draft LMAP Data Model November 2015 104.20.0.85 14024 13756 8589 2015-03-25T00:00:56+00:00 www.google.com 80 2a00:1450:4008:800::1012 19246 19416 19443 2015-03-25T00:00:56+00:00 www.google.com 80 216.58.213.36 11692 11668 11933
Appendix I. Example Report (JSON) { "report": { "date": "2015-10-28T13:27:42+02:00", "agent-id": "550e8400-e29b-41d4-a716-446655440000", "group-id": "wireless measurement at the north-pole", "task": [ { "name": "icmp-latency-measurement", "header": { "column": [ "target", "ip", "rtt-1", "rtt-2", "rtt-3", "rtt-4", "rtt-5" Schoenwaelder & Bajpai Expires May 4, 2016 [Page 50] Internet-Draft LMAP Data Model November 2015 ] }, "row": [ { "start": "2015-03-25T00:00:55+00:00", "value": [ "www.ietf.org", "104.20.0.85", "14.15", "14.14", "14.09", "14.17", "14.51" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.google.com", "216.58.213.36", "12.24", "11.99", "12.49", "11.87", "12.45" ] } ] }, { "name": "happy-dns-measurement", "header": { "column": [ "target", "ip", "name" ] }, "row": [ { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "2400:cb00:2048:1::6814:55", "www.ietf.org.cdn.cloudflare-dnssec.net" ] }, { Schoenwaelder & Bajpai Expires May 4, 2016 [Page 51] Internet-Draft LMAP Data Model November 2015 "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "2400:cb00:2048:1::6814:155", "www.ietf.org.cdn.cloudflare-dnssec.net" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "104.20.1.85", "www.ietf.org.cdn.cloudflare-dnssec.net" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "104.20.0.85", "www.ietf.org.cdn.cloudflare-dnssec.net" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.google.com", "2a00:1450:4008:800::1012", "ber01s08-in-x12.1e100.net" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.google.com", "216.58.213.36", "ber01s15-in-f36.1e100.net" ] } ] }, { "name": "happy-connect-measurement", "header": { "column": [ "target", "port", "ip", Schoenwaelder & Bajpai Expires May 4, 2016 [Page 52] Internet-Draft LMAP Data Model November 2015 "time-1", "time-2", "time-3" ] }, "row": [ { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "80", "2400:cb00:2048:1::6814:55", "8164", "8019", "14066" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "80", "2400:cb00:2048:1::6814:155", "14131", "14029", "7984" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "80", "104.20.1.85", "13821", "13736", "7995" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.ietf.org", "80", "104.20.0.85", "14024", "13756", "8589" Schoenwaelder & Bajpai Expires May 4, 2016 [Page 53] Internet-Draft LMAP Data Model November 2015 ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.google.com", "80", "2a00:1450:4008:800::1012", "19246", "19416", "19443" ] }, { "start": "2015-03-25T00:00:56+00:00", "value": [ "www.google.com", "80", "216.58.213.36", "11692", "11668", "11933" ] } ] } ] } } Authors' Addresses Juergen Schoenwaelder Jacobs University Bremen Email: j.schoenwaelder@jacobs-university.de Vaibhav Bajpai Jacobs University Bremen Email: v.bajpai@jacobs-university.de Schoenwaelder & Bajpai Expires May 4, 2016 [Page 54]