rfc9808v1.txt		rfc9808.txt
	Internet Engineering Task Force (IETF) A. Ryan		Internet Engineering Task Force (IETF) A. Ryan
	Request for Comments: 9808 Disney Streaming		Request for Comments: 9808 Disney Streaming
	Category: Standards Track B. Rosenblum		Category: Standards Track B. Rosenblum
	ISSN: 2070-1721 Vecima		ISSN: 2070-1721 Vecima
	N. Sopher		N. Sopher
	Qwilt		Qwilt
	June 2025		July 2025
	Content Delivery Network Interconnection (CDNI) Capacity Capability		Content Delivery Network Interconnection (CDNI) Capacity Capability
	Advertisement Extensions		Advertisement Extensions
	Abstract		Abstract
	The Content Delivery Network Interconnection (CDNI) Capacity		This specification defines a set of additional Capability Objects
	Capability Advertisement Extensions define a set of additional		that provide information about current downstream CDN (dCDN)
	Capability Objects that provide information about current downstream		utilization and specified usage limits to the delegating upstream CDN
	CDN (dCDN) utilization and specified usage limits to the delegating		(uCDN) in order to inform traffic delegation decisions.
	upstream CDN (uCDN) in order to inform traffic delegation decisions.
	This document supplements the CDNI Capability Objects, defined in RFC		This document supplements the CDNI Capability Objects, defined in RFC
	8008 as part of the Footprint & Capabilities Advertisement Interface		8008 as part of the Footprint & Capabilities Advertisement Interface
	(FCI), with two additional Capability Objects: FCI.CapacityLimits and		(FCI), with two additional Capability Objects: FCI.CapacityLimits and
	FCI.Telemetry.		FCI.Telemetry.
	Status of This Memo		Status of This Memo
	This is an Internet Standards Track document.		This is an Internet Standards Track document.
	skipping to change at line 74 ¶		skipping to change at line 73 ¶
	2.1.1.1. Telemetry Source Types		2.1.1.1. Telemetry Source Types
	2.1.1.2. Telemetry Source Metric Object		2.1.1.2. Telemetry Source Metric Object
	2.1.2. Telemetry Capability Object Serialization		2.1.2. Telemetry Capability Object Serialization
	2.2. CapacityLimits Capability Object		2.2. CapacityLimits Capability Object
	2.2.1. CapacityLimit Object		2.2.1. CapacityLimit Object
	2.2.1.1. CapacityLimit Types		2.2.1.1. CapacityLimit Types
	2.2.1.2. CapacityLimitTelemetrySource Object		2.2.1.2. CapacityLimitTelemetrySource Object
	2.2.2. CapacityLimit Object Serialization		2.2.2. CapacityLimit Object Serialization
	3. IANA Considerations		3. IANA Considerations
	3.1. CDNI Payload Types		3.1. CDNI Payload Types
	3.1.1. CDNI FCI Telemetry Payload Type		3.1.1. CDNI FCI.Telemetry Payload Type
	3.1.2. CDNI FCI Capacity Limits Payload Type		3.1.2. CDNI FCI.CapacityLimits Payload Type
	3.2. CDNI Telemetry Source Types Registry		3.2. CDNI Telemetry Source Types Registry
	3.2.1. CDNI Generic Telemetry Source Type		3.2.1. CDNI Generic Telemetry Source Type
	3.3. CDNI Capacity Limit Types Registry		3.3. CDNI Capacity Limit Types Registry
	4. Security Considerations		4. Security Considerations
	5. References		5. References
	5.1. Normative References		5.1. Normative References
	5.2. Informative References		5.2. Informative References
	Acknowledgements		Acknowledgements
	Authors' Addresses		Authors' Addresses
	skipping to change at line 99 ¶		skipping to change at line 98 ¶
	CDN (dCDN), it is important to ensure that an appropriate amount of		CDN (dCDN), it is important to ensure that an appropriate amount of
	traffic is delegated. To achieve that, this specification defines a		traffic is delegated. To achieve that, this specification defines a
	feedback mechanism to inform the delegator how much traffic may be		feedback mechanism to inform the delegator how much traffic may be
	delegated. The traffic level information provided by that interface		delegated. The traffic level information provided by that interface
	will be consumed by services, such as a request router, to inform		will be consumed by services, such as a request router, to inform
	that service's traffic delegation decisions. The provided		that service's traffic delegation decisions. The provided
	information is advisory and does not represent a guarantee,		information is advisory and does not represent a guarantee,
	commitment, or reservation of capacity.		commitment, or reservation of capacity.
	This document defines and registers CDNI Payload Types (as defined in		This document defines and registers CDNI Payload Types (as defined in
	Section 7.1 of [RFC8006]). These Payload types are used for		Section 7.1 of [RFC8006]). These Payload Types are used for
	Capability Objects, which are added to those defined in Section 4 of		Capability Objects, which are added to those defined in Section 4 of
	[RFC8008].		[RFC8008].
	1.1. Terminology		1.1. Terminology
	The following term is used throughout this document:		The following term is used throughout this document:
	CDN: Content Delivery Network		CDN: Content Delivery Network
	Additionally, this document reuses the terminology defined in		Additionally, this document reuses the terminology defined in
	skipping to change at line 137 ¶		skipping to change at line 136 ¶
	acceptable levels of traffic delegation, the following process has		acceptable levels of traffic delegation, the following process has
	been defined:		been defined:
	In normal operation, a uCDN will communicate with a dCDN, via an		In normal operation, a uCDN will communicate with a dCDN, via an
	interface, to collect and understand any limits that a dCDN has		interface, to collect and understand any limits that a dCDN has
	set forth for traffic delegation from a uCDN. These limits will		set forth for traffic delegation from a uCDN. These limits will
	come in the form of metrics such as bits per second, requests per		come in the form of metrics such as bits per second, requests per
	second, etc. These limits can be thought of as Not to Exceed		second, etc. These limits can be thought of as Not to Exceed
	(NTE) limits.		(NTE) limits.
	The dCDN should provide access to a telemetry source of near real-		The dCDN should provide access to a Telemetry Source of near real-
	time metrics that the uCDN can use to track current usage. The		time metrics that the uCDN can use to track current usage. The
	uCDN should compare its current usage to the limits the dCDN has		uCDN should compare its current usage to the limits the dCDN has
	put forth and adjust traffic delegation decisions accordingly to		put forth and adjust traffic delegation decisions accordingly to
	keep current usage under the specified limits.		keep current usage under the specified limits.
	In summary, the dCDN will inform the uCDN of the amount of traffic		In summary, the dCDN will inform the uCDN of the amount of traffic
	that may be delegated. Additionally, it will provide a telemetry		that may be delegated. Additionally, it will provide a Telemetry
	source aligned with this limit, allowing the uCDN to monitor its		Source aligned with this limit, allowing the uCDN to monitor its
	current usage against the advertised value. Having a limit and a		current usage against the advertised value. Having a limit and a
	corresponding telemetry source creates an unambiguous definition		corresponding Telemetry Source creates an unambiguous definition
	understood by both parties.		understood by both parties.
	Limits that are communicated from the dCDN to the uCDN should be		Limits that are communicated from the dCDN to the uCDN should be
	considered valid based on the Time to Live (TTL) provided by a		considered valid based on the Time to Live (TTL) provided by a
	mechanism of the underlying transport, e.g., an HTTP Cache-Control		mechanism of the underlying transport, e.g., an HTTP Cache-Control
	header. The intention is that the limits would have a long-lived TTL		header. The intention is that the limits would have a long-lived TTL
	and would represent a reasonable peak utilization limit that the uCDN		and would represent a reasonable peak utilization limit that the uCDN
	should target. If the underlying transport does not provide a		should target. If the underlying transport does not provide a
	mechanism for the dCDN to communicate the TTL of the limits, the TTL		mechanism for the dCDN to communicate the TTL of the limits, the TTL
	should be communicated through an out-of-band mechanism agreed upon		should be communicated through an out-of-band mechanism agreed upon
	between the dCDN and uCDN.		between the dCDN and uCDN.
	2. CDNI Additional Capability Objects		2. CDNI Additional Capability Objects
	Section 5 of [RFC8008] describes the FCI Capability Advertisement		Section 5 of [RFC8008] describes the FCI Capability Advertisement
	Object, which contains a CDNI Capability Object as well as the		Object, which contains a CDNI Capability Object as well as the
	capability object type (a CDNI Payload Type). The section also		capability-type (a CDNI Payload Type). The section also defines the
	defines the Capability Objects per such type. Below, we define two		Capability Objects per such type. Below, we define two additional
	additional Capability Objects.		Capability Objects.
	Note: In the following sections, the term "mandatory-to-specify" is		| Note: In the following sections, the term "mandatory-to-
	used to convey which properties MUST be included when serializing a		| specify" is used to convey which properties MUST be included
	given capability object. When mandatory-to-specify is defined as a		| when serializing a given capability object. When mandatory-to-
	"Yes" for an individual property, it means that if the object		| specify is defined as a "Yes" for an individual property, it
	containing that property is included in an FCI message, then the		| means that if the object containing that property is included
	mandatory-to-specify property MUST be included.		| in an FCI message, then the mandatory-to-specify property MUST
			| be included.
	2.1. Telemetry Capability Object		2.1. Telemetry Capability Object
	The Telemetry Capability Object advertises a list of telemetry		The Telemetry Capability Object advertises a list of Telemetry
	sources made available to the uCDN by the dCDN. In this document,		Sources made available to the uCDN by the dCDN. In this document,
	telemetry data is being defined as near real-time aggregated metrics		telemetry data is being defined as near real-time aggregated metrics
	of dCDN utilization, such as bits per second egress, and is specific		of dCDN utilization, such as bits per second egress, and is specific
	to the uCDN and dCDN traffic delegation relationship.		to the uCDN and dCDN traffic delegation relationship.
	Telemetry data is uniquely defined by a source ID, a metric name, and		Telemetry data is uniquely defined by a source ID, a metric name, and
	the footprints that are associated with an FCI.Capability		the footprints that are associated with an FCI Capabilities
	advertisement. When defining a CapacityLimit, the meaning of a limit		advertisement. When defining a CapacityLimit, the meaning of a limit
	might be ambiguous if the uCDN and dCDN are observing telemetry via		might be ambiguous if the uCDN and dCDN are observing telemetry via
	different data sources. A dCDN-provided telemetry source that both		different data sources. A dCDN-provided Telemetry Source that both
	parties reference serves as a non-ambiguous metric for use when		parties reference serves as a non-ambiguous metric for use when
	comparing current usage to a limit.		comparing current usage to a limit.
	Telemetry data is important for making informed traffic delegation		Telemetry data is important for making informed traffic delegation
	decisions. Additionally, it is essential in providing visibility of		decisions. Additionally, it is essential in providing visibility of
	traffic that has been delegated. In situations where there are		traffic that has been delegated. In situations where there are
	multiple CDN delegations, a uCDN will need to aggregate the usage		multiple CDN delegations, a uCDN will need to aggregate the usage
	information from any dCDNs to which it delegated when asked to		information from any dCDNs to which it delegated when asked to
	provide usage information, otherwise the traffic may seem unaccounted		provide usage information, otherwise the traffic may seem unaccounted
	for.		for.
	Example: A Content Provider delegates traffic directly to a uCDN, and		Example: A Content Provider delegates traffic directly to a uCDN, and
	that uCDN delegates that traffic to a dCDN. When the Content		that uCDN delegates that traffic to a dCDN. When the Content
	Provider polls the uCDN telemetry interface, any of the traffic the		Provider polls the uCDN telemetry interface, any of the traffic the
	uCDN delegated to the dCDN would become invisible to the Content		uCDN delegated to the dCDN would become invisible to the Content
	Provider, unless the uCDN aggregates the dCDN telemetry with its own		Provider, unless the uCDN aggregates the dCDN telemetry with its own
	metrics.		metrics.
	Property: sources		Property: sources
	Description: Telemetry sources made available to the uCDN.		Description: Telemetry Sources made available to the uCDN.
	Type: A JSON array of Telemetry Source objects (see		Type: A JSON array of Telemetry Source objects (see
	Section 2.1.1).		Section 2.1.1).
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	2.1.1. Telemetry Source Object		2.1.1. Telemetry Source Object
	The Telemetry Source Object is made of an associated type, a list of		The Telemetry Source Object is made of an associated type, a list of
	exposed metrics, and type-specific configuration data.		exposed metrics, and type-specific configuration data.
	Property: id		Property: id
	Description: An identifier of a telemetry source. The ID string		Description: An identifier of a telemetry source. The ID string
	assigned to this Telemetry Source MUST be unique across all		assigned to this Telemetry Source MUST be unique across all
	Telemetry Source objects in the advertisement containing this		Telemetry Source objects in the advertisement containing this
	Telemetry Source Object. The ID string MUST remain consistent		Telemetry Source Object. The ID string MUST remain consistent
	for the same source reference across advertisements.		for the same source reference across advertisements.
	Type: String.		Type: String
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: type		Property: type
	Description: A valid telemetry source type (see Section 2.1.1.1).		Description: A valid Telemetry Source Type (see Section 2.1.1.1).
	Type: String.		Type: String
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: metrics		Property: metrics
	Description: The metrics exposed by this source.		Description: The metrics exposed by this source.
	Type: A JSON array of Telemetry Source Metric objects (see		Type: A JSON array of Telemetry Source Metric Objects (see
	Section 2.1.1.2).		Section 2.1.1.2).
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: configuration		Property: configuration
	Description: a source-specific representation of the Telemetry		Description: A source-specific representation of the Telemetry
	Source configuration. For the generic source type, this		Source configuration. For the generic source type, this
	configuration format is defined as out-of-band. For other		configuration format is defined as out-of-band. For other
	types, the configuration format will be specified in a yet-to-		types, the configuration format will be specified in a yet-to-
	be-defined telemetry interface specification. The goal of this		be-defined telemetry interface specification. The goal of this
	element is to allow for forward compatibility with a formal		element is to allow for forward compatibility with a formal
	telemetry interface.		telemetry interface.
	Type: A JSON object, the structure of which is specific to the		Type: A JSON object, the structure of which is specific to the
	Telemetry Source and outside the scope of this document.		Telemetry Source and outside the scope of this document.
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	2.1.1.1. Telemetry Source Types		2.1.1.1. Telemetry Source Types
	At the time of this writing, the registry of valid Telemetry Source		At the time of this writing, the "CDNI Telemetry Source Types"
	Types is limited to a single type: generic (see Section 3.2.1).		registry is limited to a single type: generic (see Table 3 in
			Section 3.2.1).
	+=============+=======================================+
	| Source Type | Description |
	+=============+=======================================+
	| generic | An object that allows for |
	| | advertisement of generic data sources |
	+-------------+---------------------------------------+
	Table 1
	2.1.1.2. Telemetry Source Metric Object		2.1.1.2. Telemetry Source Metric Object
	The Telemetry Source Metric Object describes the metric to be		The Telemetry Source Metric Object describes the metric to be
	exposed.		exposed.
	Property: name		Property: name
	Description: An identifier for this metric. This name MUST be		Description: An identifier for this metric. This name MUST be
	unique among metric objects within the containing Telemetry		unique among metric objects within the containing Telemetry
	Source. The name MUST remain consistent for the same source		Source. The name MUST remain consistent for the same source
	reference across advertisements.		reference across advertisements.
	Type: String.		Type: String
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: time-granularity		Property: time-granularity
	Description: The time, in seconds, representing the metric data.		Description: The time, in seconds, representing the metric data.
	For example, a value representing the last 5 minutes would have		For example, a value representing the last 5 minutes would have
	a time-granularity of 300.		a time-granularity of 300.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	Property: data-percentile		Property: data-percentile
	Description: The percentile calculation the data represents,		Description: The percentile calculation the data represents,
	i.e., 50 percentile would equate to the median over the time-		i.e., 50 percentile would equate to the median over the time-
	granularity. Lack of a data-percentile indicates that the data		granularity. Lack of a data-percentile indicates that the data
	MUST be the mean over the time representation.		MUST be the mean over the time representation.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	Property: latency		Property: latency
	Description: Time in seconds that the data is behind real-time.		Description: Time in seconds that the data is behind real-time.
	This is important to specify to help the uCDN understand how		This is important to specify to help the uCDN understand how
	long it might take to reflect traffic adjustments in the		long it might take to reflect traffic adjustments in the
	metrics.		metrics.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	2.1.2. Telemetry Capability Object Serialization		2.1.2. Telemetry Capability Object Serialization
	The following shows an example of Telemetry Capability including two		The following shows an example of a Telemetry Capability Object,
	metrics for a source, that is scoped to a footprint.		including two metrics for a source, that is scoped to a footprint.
	{		{
	"capabilities": [		"capabilities": [
	{		{
	"capability-type": "FCI.Telemetry",		"capability-type": "FCI.Telemetry",
	"capability-value": {		"capability-value": {
	"sources": [		"sources": [
	{		{
	"id": "capacity_metrics_region1",		"id": "capacity_metrics_region1",
	"type": "generic",		"type": "generic",
	skipping to change at line 365 ¶		skipping to change at line 357 ¶
	"footprints": [		"footprints": [
	<footprint objects>		<footprint objects>
	]		]
	}		}
	]		]
	}		}
	2.2. CapacityLimits Capability Object		2.2. CapacityLimits Capability Object
	The CapacityLimits Capability Object enables the dCDN to specify		The CapacityLimits Capability Object enables the dCDN to specify
	traffic delegation limits to a uCDN within an FCI.Capabilities		traffic delegation limits to a uCDN within an FCI Capabilities
	advertisement. The limits specified by the dCDN will inform the uCDN		advertisement. The limits specified by the dCDN will inform the uCDN
	on how much traffic may be delegated to the dCDN. The limits		on how much traffic may be delegated to the dCDN. The limits
	specified by the dCDN should be considered NTE limits. The limits		specified by the dCDN should be considered NTE limits. The limits
	should be based on near real-time telemetry data that the dCDN		should be based on near real-time telemetry data that the dCDN
	provides to the uCDN. In other words, for each limit that is		provides to the uCDN. In other words, for each limit that is
	advertised, there should also exist a telemetry source that provides		advertised, there should also exist a Telemetry Source that provides
	current utilization data against the particular advertised limit.		current utilization data against the particular advertised limit.
	Property: limits		Property: limits
	Description: A collection of CapacityLimit objects.		Description: A collection of CapacityLimit Objects.
	Type: A JSON array of CapacityLimit objects (see Section 2.2.1).		Type: A JSON array of CapacityLimit Objects (see Section 2.2.1).
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	2.2.1. CapacityLimit Object		2.2.1. CapacityLimit Object
	A CapacityLimit object is used to represent traffic limits for		A CapacityLimit Object is used to represent traffic limits for
	delegation from the uCDN towards the dCDN. The limit object is		delegation from the uCDN towards the dCDN. The limit object is
	scoped to the footprint associated with the FCI capability		scoped to the footprint associated with the FCI Capabilities
	advertisement encompassing this object. Limits MUST be considered		advertisement encompassing this object. Limits MUST be considered
	using a logical "AND": A uCDN will need to ensure that all limits are		using a logical "AND": A uCDN will need to ensure that all limits are
	considered rather than choosing only the most specific.		considered rather than choosing only the most specific.
	Property: limit-type		Property: limit-type
	Description: The units of maximum-hard and maximum-soft.		Description: The units of maximum-hard and maximum-soft.
	Type: String. One of the values listed in Section 2.2.1.1.		Type: String. One of the values listed in Section 2.2.1.1.
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: id		Property: id
	Description: Specifies an identifier associated with a limit.		Description: Specifies an identifier associated with a limit.
	This MAY be used as a relational identifier to a specific		This MAY be used as a relational identifier to a specific
	CapacityLimit Object. If specified, this identifier MUST be		CapacityLimit Object. If specified, this identifier MUST be
	unique among specified identifiers associated with any other		unique among specified identifiers associated with any other
	CapacityLimit objects in the advertisement containing this		CapacityLimit Objects in the advertisement containing this
	CapacityLimit Object.		CapacityLimit Object.
	Type: String.		Type: String
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	Property: maximum-hard		Property: maximum-hard
	Description: The maximum unit of capacity that is available for		Description: The maximum unit of capacity that is available for
	use.		use.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: maximum-soft		Property: maximum-soft
	Description: A soft limit at which a uCDN SHOULD reduce traffic		Description: A soft limit at which a uCDN SHOULD reduce traffic
	before hitting the hard limit. This value MUST be less than		before hitting the hard limit. This value MUST be less than
	the value of maximum-hard. If this value is not specified, it		the value of maximum-hard. If this value is not specified, it
	is equal to the value of maximum-hard.		is equal to the value of maximum-hard.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	Property: current		Property: current
	Description: Specifies the current usage value of the limit. It		Description: Specifies the current usage value of the limit. It
	is NOT RECOMMENDED to specify the current usage value inline		is NOT RECOMMENDED to specify the current usage value inline
	with the FCI.CapacityLimits advertisements as it will reduce		with the FCI.CapacityLimits advertisements as it will reduce
	the ability to cache the response, but this mechanism exists		the ability to cache the response, but this mechanism exists
	for simple use cases where an external telemetry source cannot		for simple use cases where an external Telemetry Source cannot
	be feasibly implemented. The intended method for providing		be feasibly implemented. The intended method for providing
	telemetry data is to reference a Telemetry Source object (see		telemetry data is to reference a Telemetry Source Object (see
	Section 2.1.1) to poll for the current usage.		Section 2.1.1) to poll for the current usage.
	Type: Unsigned Integer.		Type: Unsigned Integer
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	Property: telemetry-source		Property: telemetry-source
	Description: The mapping of each particular limit to a specific		Description: The mapping of each particular limit to a specific
	metric with relevant real-time data provided by a telemetry		metric with relevant real-time data provided by a Telemetry
	source.		Source.
	Type: CapacityLimitTelemetrySource object (see Section 2.2.1.2).		Type: CapacityLimitTelemetrySource object (see Section 2.2.1.2).
	Mandatory-to-Specify: No.		Mandatory-to-Specify: No
	2.2.1.1. CapacityLimit Types		2.2.1.1. CapacityLimit Types
	Below are listed the valid capacity limit-types registered in the		Below are listed the valid limit-type entries registered in the "CDNI
	"CDNI Capacity Limit Types" registry. The values specified here		Capacity Limit Types" registry. The values specified here represent
	represent the types that were identified as being the most relevant		the types that were identified as being the most relevant metrics for
	metrics for the purposes of traffic delegation between CDNs.		the purposes of traffic delegation between CDNs.
	+=====================+=====================+		+=====================+=====================+
	| Capacity Limit Type | Units |		| Capacity Limit Type | Units |
	+=====================+=====================+		+=====================+=====================+
	| egress | Bits per second |		| egress | Bits per second |
	+---------------------+---------------------+		+---------------------+---------------------+
	| requests | Requests per second |		| requests | Requests per second |
	+---------------------+---------------------+		+---------------------+---------------------+
	| storage-size | Total bytes |		| storage-size | Total bytes |
	+---------------------+---------------------+		+---------------------+---------------------+
	| storage-objects | Count |		| storage-objects | Count |
	+---------------------+---------------------+		+---------------------+---------------------+
	| sessions | Count |		| sessions | Count |
	+---------------------+---------------------+		+---------------------+---------------------+
	| cache-size | Total bytes |		| cache-size | Total bytes |
	+---------------------+---------------------+		+---------------------+---------------------+
	Table 2		Table 1
	2.2.1.2. CapacityLimitTelemetrySource Object		2.2.1.2. CapacityLimitTelemetrySource Object
	The CapacityLimitTelemetrySource Object refers to a specific metric		The CapacityLimitTelemetrySource Object refers to a specific metric
	within a Telemetry Source.		within a Telemetry Source.
	Property: id		Property: id
	Description: Reference to the "id" of a telemetry source defined		Description: Reference to the "id" of a Telemetry Source defined
	by a Telemetry Capability object as defined in Section 2.1.		by a Telemetry Capability Object as defined in Section 2.1.
	Type: String.		Type: String
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	Property: metric		Property: metric
	Description: Reference to the "name" property of a metric defined		Description: Reference to the "name" property of a metric defined
	within a telemetry source of a Telemetry Capability object.		within a Telemetry Source of a Telemetry Capability object.
	Type: String.		Type: String
	Mandatory-to-Specify: Yes.		Mandatory-to-Specify: Yes
	2.2.2. CapacityLimit Object Serialization		2.2.2. CapacityLimit Object Serialization
	The following shows an example of an FCI.CapacityLimits object.		The following shows an example of an FCI.CapacityLimits object.
	{		{
	"capabilities": [		"capabilities": [
	{		{
	"capability-type":"FCI.CapacityLimits",		"capability-type":"FCI.CapacityLimits",
	"capability-value":{		"capability-value":{
	skipping to change at line 550 ¶		skipping to change at line 542 ¶
	Network Interconnection (CDNI) Parameters" registry group:		Network Interconnection (CDNI) Parameters" registry group:
	+====================+===========+		+====================+===========+
	| Payload Type | Reference |		| Payload Type | Reference |
	+====================+===========+		+====================+===========+
	| FCI.Telemetry | RFC 9808 |		| FCI.Telemetry | RFC 9808 |
	+--------------------+-----------+		+--------------------+-----------+
	| FCI.CapacityLimits | RFC 9808 |		| FCI.CapacityLimits | RFC 9808 |
	+--------------------+-----------+		+--------------------+-----------+
	Table 3		Table 2
	3.1.1. CDNI FCI Telemetry Payload Type		3.1.1. CDNI FCI.Telemetry Payload Type
	Purpose: The purpose of this Payload Type is to list the supported		Purpose: The purpose of this Payload Type is to list the supported
	telemetry sources and the metrics made available by each source.		Telemetry Sources and the metrics made available by each source.
	Interface: FCI.		Interface: FCI
	Encoding: See Section 2.1.		Encoding: See Section 2.1.
	3.1.2. CDNI FCI Capacity Limits Payload Type		3.1.2. CDNI FCI.CapacityLimits Payload Type
	Purpose: The purpose of this Payload Type is to define Capacity		Purpose: The purpose of this Payload Type is to define Capacity
	Limits based on utilization metrics corresponding to telemetry		Limits based on utilization metrics corresponding to Telemetry
	sources provided by the dCDN.		Sources provided by the dCDN.
	Interface: FCI.		Interface: FCI
	Encoding: See Section 2.2.		Encoding: See Section 2.2.
	3.2. CDNI Telemetry Source Types Registry		3.2. CDNI Telemetry Source Types Registry
	IANA has added the following new registry within the "Content		IANA has added the following new registry within the "Content
	Delivery Network Interconnection (CDNI) Parameters" registry group at		Delivery Network Interconnection (CDNI) Parameters" registry group at
	<https://www.iana.org/assignments/cdni-parameters>:		<https://www.iana.org/assignments/cdni-parameters>:
	Registry Name: CDNI Telemetry Source Types		Registry Name: CDNI Telemetry Source Types
	skipping to change at line 590 ¶		skipping to change at line 582 ¶
	defines the valid values for the "type" property of the Telemetry		defines the valid values for the "type" property of the Telemetry
	Source object defined in Section 2.1.1.		Source object defined in Section 2.1.1.
	Registration Procedure: The registry follows the Specification		Registration Procedure: The registry follows the Specification
	Required policy as defined in [RFC8126]. The designated expert		Required policy as defined in [RFC8126]. The designated expert
	should consider the following guidelines when evaluating		should consider the following guidelines when evaluating
	registration requests:		registration requests:
	* The new type definition does not duplicate existing types.		* The new type definition does not duplicate existing types.
	* The review should verify that the telemetry source is		* The review should verify that the Telemetry Source is
	applicable to the CDNI use cases and that the description is		applicable to the CDNI use cases and that the description is
	clear and unambiguous.		clear and unambiguous.
	* The registration is applicable for general use and is not		* The registration is applicable for general use and is not
	proprietary.		proprietary.
	* The "configuration" property has a fully specified object		* The "configuration" property has a fully specified object
	definition with a description of each defined property.		definition with a description of each defined property.
	The following value has been registered:		The following value has been registered:
	+=============+===========+		+=============+=======================================+===========+
	| Source Type | Reference |		| Source Type | Description | Reference |
	+=============+===========+		+=============+=======================================+===========+
	| generic | RFC 9808 |		| generic | An object that allows for | RFC 9808 |
	+-------------+-----------+		| | advertisement of generic data sources | |
			+-------------+---------------------------------------+-----------+
	Table 4		Table 3
	3.2.1. CDNI Generic Telemetry Source Type		3.2.1. CDNI Generic Telemetry Source Type
	Purpose: The purpose of this Telemetry Source Type is to provide a		Purpose: The purpose of this Telemetry Source Type is to provide a
	source-agnostic telemetry type that may be used for generic		source-agnostic telemetry type that may be used for generic
	telemetry source advertisement.		Telemetry Source advertisement.
	Usage: See Section 2.1.1.		Usage: See Section 2.1.1.
	3.3. CDNI Capacity Limit Types Registry		3.3. CDNI Capacity Limit Types Registry
	IANA has added the following new registry within the "Content		IANA has added the following new registry within the "Content
	Delivery Network Interconnection (CDNI) Parameters" registry group at		Delivery Network Interconnection (CDNI) Parameters" registry group at
	<https://www.iana.org/assignments/cdni-parameters>:		<https://www.iana.org/assignments/cdni-parameters>:
	Registry Name: CDNI Capacity Limit Types		Registry Name: CDNI Capacity Limit Types
	Registry Description: The "CDNI Capacity Limit Types" registry		Registry Description: The "CDNI Capacity Limit Types" registry
	defines the valid values of the "limit-type" property of a		defines the valid values of the "limit-type" property of a
	CapacityLimit object defined in Section 2.2.1.		CapacityLimit Object defined in Section 2.2.1.
	Registration Procedure: The registry follows the Specification		Registration Procedure: The registry follows the Specification
	Required policy as defined in [RFC8126]. The designated expert		Required policy as defined in [RFC8126]. The designated expert
	should consider the following guidelines when evaluating		should consider the following guidelines when evaluating
	registration requests:		registration requests:
	* The new capacity limit type does not duplicate existing		* The new capacity limit-type does not duplicate existing
	entries.		entries.
	* The submission has a defined purpose. The newly defined		* The submission has a defined purpose. The newly defined
	capacity limit type should be clearly justified in the context		capacity limit-type should be clearly justified in the context
	of one or more CDNI use cases.		of one or more CDNI use cases.
	* The description of the capacity limit type is well-documented		* The description of the capacity limit-type is well-documented
	and unambiguous.		and unambiguous.
	The following values have been registered:		The following values have been registered:
	+=====================+=====================+===========+		+=====================+=====================+===========+
	| Capacity Limit Type | Units | Reference |		| Capacity Limit Type | Units | Reference |
	+=====================+=====================+===========+		+=====================+=====================+===========+
	| egress | Bits per second | RFC 9808 |		| egress | Bits per second | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	| requests | Requests per second | RFC 9808 |		| requests | Requests per second | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	| storage-size | Total bytes | RFC 9808 |		| storage-size | Total bytes | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	| storage-objects | Count | RFC 9808 |		| storage-objects | Count | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	| sessions | Count | RFC 9808 |		| sessions | Count | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	| cache-size | Total bytes | RFC 9808 |		| cache-size | Total bytes | RFC 9808 |
	+---------------------+---------------------+-----------+		+---------------------+---------------------+-----------+
	Table 5		Table 4
	Usage: See Section 2.2.1.1.		Usage: See Section 2.2.1.1.
	4. Security Considerations		4. Security Considerations
	This specification is in accordance with the CDNI Request Routing:		This specification is in accordance with the CDNI Request Routing:
	Footprint and Capabilities Semantics. As such, it is subject to the		Footprint and Capabilities Semantics. As such, it is subject to the
	security and privacy considerations as defined in Section 7 of		security and privacy considerations as defined in Section 7 of
	[RFC8008].		[RFC8008].
End of changes. 78 change blocks.
	113 lines changed or deleted		106 lines changed or added
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