draft-ietf-mmusic-sdp-mux-attributes-15.txt		draft-ietf-mmusic-sdp-mux-attributes-16.txt
	Network Working Group S. Nandakumar		Network Working Group S. Nandakumar
	Internet-Draft Cisco		Internet-Draft Cisco
	Intended status: Standards Track December 16, 2016		Intended status: Standards Track December 19, 2016
	Expires: June 19, 2017		Expires: June 22, 2017
	A Framework for SDP Attributes when Multiplexing		A Framework for SDP Attributes when Multiplexing
	draft-ietf-mmusic-sdp-mux-attributes-15		draft-ietf-mmusic-sdp-mux-attributes-16
	Abstract		Abstract
	The purpose of this specification is to provide a framework for		The purpose of this specification is to provide a framework for
	analyzing the multiplexing characteristics of Session Description		analyzing the multiplexing characteristics of Session Description
	Protocol (SDP) attributes when SDP is used to negotiate the usage of		Protocol (SDP) attributes when SDP is used to negotiate the usage of
	single 5-tuple for sending and receiving media associated with		single 5-tuple for sending and receiving media associated with
	multiple media descriptions.		multiple media descriptions.
	This specification also categorizes the existing SDP attributes based		This specification also categorizes the existing SDP attributes based
	skipping to change at page 1, line 37 ¶		skipping to change at page 1, line 37 ¶
	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 June 19, 2017.		This Internet-Draft will expire on June 22, 2017.
	Copyright Notice		Copyright Notice
	Copyright (c) 2016 IETF Trust and the persons identified as the		Copyright (c) 2016 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
	skipping to change at page 3, line 5 ¶		skipping to change at page 3, line 5 ¶
	5.20. RFC6285: Rapid Acquisition of Multicast RTP Sessions . . 24		5.20. RFC6285: Rapid Acquisition of Multicast RTP Sessions . . 24
	5.21. RFC6230: Media Control Channel Framework . . . . . . . . 25		5.21. RFC6230: Media Control Channel Framework . . . . . . . . 25
	5.22. RFC6364: SDP Elements for FEC Framework . . . . . . . . . 25		5.22. RFC6364: SDP Elements for FEC Framework . . . . . . . . . 25
	5.23. RFC4796: Content Attribute . . . . . . . . . . . . . . . 26		5.23. RFC4796: Content Attribute . . . . . . . . . . . . . . . 26
	5.24. RFC3407: SDP Simple Capability Declaration . . . . . . . 26		5.24. RFC3407: SDP Simple Capability Declaration . . . . . . . 26
	5.25. RFC6284: Port Mapping between Unicast and Multicast RTP		5.25. RFC6284: Port Mapping between Unicast and Multicast RTP
	Sessions . . . . . . . . . . . . . . . . . . . . . . . . 27		Sessions . . . . . . . . . . . . . . . . . . . . . . . . 27
	5.26. RFC6714: MSRP-CEMA . . . . . . . . . . . . . . . . . . . 28		5.26. RFC6714: MSRP-CEMA . . . . . . . . . . . . . . . . . . . 28
	5.27. RFC4583: SDP Format for BFCP Streams . . . . . . . . . . 28		5.27. RFC4583: SDP Format for BFCP Streams . . . . . . . . . . 28
	5.28. RFC5547: SDP Offer/Answer for File Transfer . . . . . . . 29		5.28. RFC5547: SDP Offer/Answer for File Transfer . . . . . . . 29
	5.29. RFC6849: SDP and RTP Media Loopback Extension . . . . . . 30		5.29. RFC6849: SDP and RTP Media Loopback Extension . . . . . . 29
	5.30. RFC5760: RTCP with Unicast Feedback . . . . . . . . . . . 30		5.30. RFC5760: RTCP with Unicast Feedback . . . . . . . . . . . 30
	5.31. RFC3611: RTCP XR . . . . . . . . . . . . . . . . . . . . 31		5.31. RFC3611: RTCP XR . . . . . . . . . . . . . . . . . . . . 30
	5.32. RFC5939: SDP Capability Negotiation . . . . . . . . . . . 31		5.32. RFC5939: SDP Capability Negotiation . . . . . . . . . . . 31
	5.33. RFC6871: SDP Media Capabilities Negotiation . . . . . . . 32		5.33. RFC6871: SDP Media Capabilities Negotiation . . . . . . . 31
	5.34. RFC7006: Miscellaneous Capabilities Negotiation SDP . . . 33		5.34. RFC7006: Miscellaneous Capabilities Negotiation SDP . . . 32
	5.35. RFC4567: Key Management Extensions for SDP and RTSP . . . 34		5.35. RFC4567: Key Management Extensions for SDP and RTSP . . . 33
	5.36. RFC4572: Comedia over TLS in SDP . . . . . . . . . . . . 35		5.36. RFC4572: Comedia over TLS in SDP . . . . . . . . . . . . 34
	5.37. RFC4570: SDP Source Filters . . . . . . . . . . . . . . . 35		5.37. RFC4570: SDP Source Filters . . . . . . . . . . . . . . . 34
	5.38. RFC6128: RTCP Port for Multicast Sessions . . . . . . . . 36		5.38. RFC6128: RTCP Port for Multicast Sessions . . . . . . . . 35
	5.39. RFC6189: ZRTP . . . . . . . . . . . . . . . . . . . . . . 36		5.39. RFC6189: ZRTP . . . . . . . . . . . . . . . . . . . . . . 35
	5.40. RFC4145: Connection-Oriented Media . . . . . . . . . . . 37		5.40. RFC4145: Connection-Oriented Media . . . . . . . . . . . 36
	5.41. RFC6947: The SDP altc Attribute . . . . . . . . . . . . . 37		5.41. RFC6947: The SDP altc Attribute . . . . . . . . . . . . . 36
	5.42. RFC7195: SDP Extension for Circuit Switched Bearers		5.42. RFC7195: SDP Extension for Circuit Switched Bearers
	in PSTN . . . . . . . . . . . . . . . . . . . . . . . . . 38		in PSTN . . . . . . . . . . . . . . . . . . . . . . . . . 37
	5.43. RFC7272: IDMS Using the RTP Control Protocol (RTCP) . . . 38		5.43. RFC7272: IDMS Using the RTP Control Protocol (RTCP) . . . 37
	5.44. RFC5159: Open Mobile Alliance (OMA) Broadcast (BCAST) SDP		5.44. RFC5159: Open Mobile Alliance (OMA) Broadcast (BCAST) SDP
	Attributes . . . . . . . . . . . . . . . . . . . . . . . 39		Attributes . . . . . . . . . . . . . . . . . . . . . . . 38
	5.45. RFC6193: Media Description for IKE in SDP . . . . . . . . 39		5.45. RFC6193: Media Description for IKE in SDP . . . . . . . . 38
	5.46. RFC2326: Real Time Streaming Protocol . . . . . . . . . . 40		5.46. RFC2326: Real Time Streaming Protocol . . . . . . . . . . 39
	5.47. RFC6064: SDP and RTSP Extensions for 3GPP . . . . . . . . 41		5.47. RFC6064: SDP and RTSP Extensions for 3GPP . . . . . . . . 40
	5.48. RFC3108: ATM SDP . . . . . . . . . . . . . . . . . . . . 43		5.48. RFC3108: ATM SDP . . . . . . . . . . . . . . . . . . . . 42
	5.49. 3GPP TS 26.114 . . . . . . . . . . . . . . . . . . . . . 45		5.49. 3GPP TS 26.114 . . . . . . . . . . . . . . . . . . . . . 44
	5.50. 3GPP TS 183.063 . . . . . . . . . . . . . . . . . . . . . 46		5.50. 3GPP TS 183.063 . . . . . . . . . . . . . . . . . . . . . 45
	5.51. 3GPP TS 24.182 . . . . . . . . . . . . . . . . . . . . . 46		5.51. 3GPP TS 24.182 . . . . . . . . . . . . . . . . . . . . . 45
	5.52. 3GPP TS 24.183 . . . . . . . . . . . . . . . . . . . . . 47		5.52. 3GPP TS 24.183 . . . . . . . . . . . . . . . . . . . . . 46
	5.53. 3GPP TS 24.229 . . . . . . . . . . . . . . . . . . . . . 47		5.53. 3GPP TS 24.229 . . . . . . . . . . . . . . . . . . . . . 46
	5.54. ITU T.38 . . . . . . . . . . . . . . . . . . . . . . . . 48		5.54. ITU T.38 . . . . . . . . . . . . . . . . . . . . . . . . 47
	5.55. ITU-T Q.1970 . . . . . . . . . . . . . . . . . . . . . . 50		5.55. ITU-T Q.1970 . . . . . . . . . . . . . . . . . . . . . . 49
	5.56. ITU-T H.248.15 . . . . . . . . . . . . . . . . . . . . . 50		5.56. ITU-T H.248.15 . . . . . . . . . . . . . . . . . . . . . 49
	5.57. RFC4975: The Message Session Relay Protocol . . . . . . . 51		5.57. RFC4975: The Message Session Relay Protocol . . . . . . . 50
	5.58. Historical Attributes . . . . . . . . . . . . . . . . . . 52		5.58. Historical Attributes . . . . . . . . . . . . . . . . . . 51
	6. bwtype Attribute Analysis . . . . . . . . . . . . . . . . . . 52		6. bwtype Attribute Analysis . . . . . . . . . . . . . . . . . . 51
	6.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 53		6.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 52
	6.2. RFC3556: SDP Bandwidth Modifiers for RTCP Bandwidth . . . 53		6.2. RFC3556: SDP Bandwidth Modifiers for RTCP Bandwidth . . . 52
	6.3. RFC3890: Bandwidth Modifier for SDP . . . . . . . . . . . 54		6.3. RFC3890: Bandwidth Modifier for SDP . . . . . . . . . . . 53
	7. rtcp-fb Attribute Analysis . . . . . . . . . . . . . . . . . 54		7. rtcp-fb Attribute Analysis . . . . . . . . . . . . . . . . . 53
	7.1. RFC4585: RTP/AVPF . . . . . . . . . . . . . . . . . . . . 54		7.1. RFC4585: RTP/AVPF . . . . . . . . . . . . . . . . . . . . 53
	7.2. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 55		7.2. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 54
	7.3. RFC6285: Unicast-Based Rapid Acquisition of Multicast RTP		7.3. RFC6285: Unicast-Based Rapid Acquisition of Multicast RTP
	Sessions (RAMS) . . . . . . . . . . . . . . . . . . . . . 56		Sessions (RAMS) . . . . . . . . . . . . . . . . . . . . . 55
	7.4. RFC6679: ECN for RTP over UDP/IP . . . . . . . . . . . . 56		7.4. RFC6679: ECN for RTP over UDP/IP . . . . . . . . . . . . 55
	7.5. RFC6642: Third-Party Loss Report . . . . . . . . . . . . 57		7.5. RFC6642: Third-Party Loss Report . . . . . . . . . . . . 56
	7.6. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 58		7.6. RFC5104: Codec Control Messages in AVPF . . . . . . . . . 57
	8. group Attribute Analysis . . . . . . . . . . . . . . . . . . 58		8. group Attribute Analysis . . . . . . . . . . . . . . . . . . 57
	8.1. RFC5888: SDP Grouping Framework . . . . . . . . . . . . . 58		8.1. RFC5888: SDP Grouping Framework . . . . . . . . . . . . . 57
	8.2. RFC3524: Mapping Media Streams to Resource		8.2. RFC3524: Mapping Media Streams to Resource
	Reservation Flows . . . . . . . . . . . . . . . . . . . . 59		Reservation Flows . . . . . . . . . . . . . . . . . . . . 58
	8.3. RFC4091: ANAT Semantics . . . . . . . . . . . . . . . . . 59		8.3. RFC4091: ANAT Semantics . . . . . . . . . . . . . . . . . 58
	8.4. RFC5956: FEC Grouping Semantics in SDP . . . . . . . . . 59		8.4. RFC5956: FEC Grouping Semantics in SDP . . . . . . . . . 58
	8.5. RFC5583: Signaling Media Decoding Dependency in SDP . . . 60		8.5. RFC5583: Signaling Media Decoding Dependency in SDP . . . 59
	8.6. RFC7104: Duplication Grouping Semantics in the SDP . . . 60		8.6. RFC7104: Duplication Grouping Semantics in the SDP . . . 59
	9. ssrc-group Attribute Analysis . . . . . . . . . . . . . . . . 61		9. ssrc-group Attribute Analysis . . . . . . . . . . . . . . . . 60
	9.1. RFC5576: Source-Specific SDP Attributes . . . . . . . . . 61		9.1. RFC5576: Source-Specific SDP Attributes . . . . . . . . . 60
	9.2. RFC7104: Duplication Grouping Semantics in the SDP . . . 61		9.2. RFC7104: Duplication Grouping Semantics in the SDP . . . 60
	10. QoS Mechanism Token Analysis . . . . . . . . . . . . . . . . 62		10. QoS Mechanism Token Analysis . . . . . . . . . . . . . . . . 61
	10.1. RFC5432: QoS Mechanism Selection in SDP . . . . . . . . 62		10.1. RFC5432: QoS Mechanism Selection in SDP . . . . . . . . 61
	11. k= Attribute Analysis . . . . . . . . . . . . . . . . . . . . 62		11. k= Attribute Analysis . . . . . . . . . . . . . . . . . . . . 61
	11.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 63		11.1. RFC4566: SDP . . . . . . . . . . . . . . . . . . . . . . 62
	12. content Attribute Analysis . . . . . . . . . . . . . . . . . 63		12. content Attribute Analysis . . . . . . . . . . . . . . . . . 62
	12.1. RFC4796 . . . . . . . . . . . . . . . . . . . . . . . . 63		12.1. RFC4796 . . . . . . . . . . . . . . . . . . . . . . . . 62
	13. Payload Formats . . . . . . . . . . . . . . . . . . . . . . . 64		13. Payload Formats . . . . . . . . . . . . . . . . . . . . . . . 63
	13.1. RFC5109: RTP Payload Format for Generic FEC . . . . . . 64		13.1. RFC5109: RTP Payload Format for Generic FEC . . . . . . 63
	14. Multiplexing Considerations for Encapsulating Attributes . . 64		14. Multiplexing Considerations for Encapsulating Attributes . . 63
	14.1. RFC3407: cpar Attribute Analysis . . . . . . . . . . . . 65		14.1. RFC3407: cpar Attribute Analysis . . . . . . . . . . . . 64
	14.2. RFC5939 Analysis . . . . . . . . . . . . . . . . . . . . 65		14.2. RFC5939 Analysis . . . . . . . . . . . . . . . . . . . . 64
	14.2.1. Recommendation: Procedures for Potential		14.2.1. Recommendation: Procedures for Potential
	Configuration Pairing . . . . . . . . . . . . . . . 66		Configuration Pairing . . . . . . . . . . . . . . . 65
	14.2.1.1. Example: Transport Capability Multiplexing . . . 67		14.2.1.1. Example: Transport Capability Multiplexing . . . 66
	14.2.1.2. Example: Attribute Capability Multiplexing . . . 68		14.2.1.2. Example: Attribute Capability Multiplexing . . . 67
	14.3. RFC6871 Analysis . . . . . . . . . . . . . . . . . . . . 69		14.3. RFC6871 Analysis . . . . . . . . . . . . . . . . . . . . 68
	14.3.1. Recommendation: Dealing with Payload Type Numbers . 69		14.3.1. Recommendation: Dealing with Payload Type Numbers . 68
	14.3.1.1. Example: Attribute Capability Under Shared		14.3.1.1. Example: Attribute Capability Under Shared
	Payload Type . . . . . . . . . . . . . . . . . . 69		Payload Type . . . . . . . . . . . . . . . . . . 68
	14.3.2. Recommendation: Dealing with Latent Configurations . 70		14.3.2. Recommendation: Dealing with Latent Configurations . 69
	15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 71		15. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 70
	15.1. New 'Multiplexing Categories' subregistry . . . . . . . 71		15.1. New 'Multiplexing Categories' subregistry . . . . . . . 70
	15.2. 'Mux Category' column for subregistries . . . . . . . . 72		15.2. 'Mux Category' column for subregistries . . . . . . . . 71
	15.2.1. Table: SDP bwtype . . . . . . . . . . . . . . . . . 72		15.2.1. Table: SDP bwtype . . . . . . . . . . . . . . . . . 71
	15.2.2. Table: att-field (session level) . . . . . . . . . . 72		15.2.2. Table: att-field (session level) . . . . . . . . . . 71
	15.2.3. Table: att-field (both session and media level) . . 73		15.2.3. Table: att-field (both session and media level) . . 72
	15.2.4. Table: att-field (media level only) . . . . . . . . 75		15.2.4. Table: att-field (media level only) . . . . . . . . 74
	15.2.5. Table: att-field (source level) . . . . . . . . . . 78		15.2.5. Table: att-field (source level) . . . . . . . . . . 77
	15.2.6. Table: content SDP Parameters . . . . . . . . . . . 79		15.2.6. Table: content SDP Parameters . . . . . . . . . . . 78
	15.2.7. Table: Semantics for the 'group' SDP Attribute . . . 79		15.2.7. Table: Semantics for the 'group' SDP Attribute . . . 78
	15.2.8. Table: 'rtcp-fb' Attribute Values . . . . . . . . . 80		15.2.8. Table: 'rtcp-fb' Attribute Values . . . . . . . . . 79
	15.2.9. Table: 'ack' and 'nack' Attribute Values . . . . . . 80		15.2.9. Table: 'ack' and 'nack' Attribute Values . . . . . . 79
	15.2.10. Table: 'depend' SDP Attribute Values . . . . . . . . 80		15.2.10. Table: 'depend' SDP Attribute Values . . . . . . . . 79
	15.2.11. Table: 'cs-correlation' Attribute Values . . . . . . 81		15.2.11. Table: 'cs-correlation' Attribute Values . . . . . . 80
	15.2.12. Table: Semantics for the 'ssrc-group' SDP Attribute 81		15.2.12. Table: Semantics for the 'ssrc-group' SDP Attribute 80
	15.2.13. Table: SDP/RTSP key management protocol identifiers 81		15.2.13. Table: SDP/RTSP key management protocol identifiers 80
	15.2.14. Table: Codec Control Messages . . . . . . . . . . . 82		15.2.14. Table: Codec Control Messages . . . . . . . . . . . 81
	15.2.15. Table: QoS Mechanism Tokens . . . . . . . . . . . . 82		15.2.15. Table: QoS Mechanism Tokens . . . . . . . . . . . . 81
	15.2.16. Table: SDP Capability Negotiation Option Tags . . . 82		15.2.16. Table: SDP Capability Negotiation Option Tags . . . 81
	15.2.17. Table: Timestamp Reference Clock Source Parameters . 83		15.2.17. Table: Timestamp Reference Clock Source Parameters . 82
	15.2.18. Table: Media Clock Source Parameters . . . . . . . . 83		15.2.18. Table: Media Clock Source Parameters . . . . . . . . 82
	16. Security Considerations . . . . . . . . . . . . . . . . . . . 84		16. Security Considerations . . . . . . . . . . . . . . . . . . . 83
	17. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 84		17. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 83
	18. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 84		18. Change Log . . . . . . . . . . . . . . . . . . . . . . . . . 83
	19. References . . . . . . . . . . . . . . . . . . . . . . . . . 88		19. References . . . . . . . . . . . . . . . . . . . . . . . . . 87
	19.1. Normative References . . . . . . . . . . . . . . . . . . 88		19.1. Normative References . . . . . . . . . . . . . . . . . . 87
	19.2. Informative References . . . . . . . . . . . . . . . . . 88		19.2. Informative References . . . . . . . . . . . . . . . . . 87
	Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 96		Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 95
	1. Introduction		1. Introduction
	SDP defines several attributes for capturing characteristics that		SDP defines several attributes for capturing characteristics that
	apply to the individual media descriptions (described by "m=" lines")		apply to the individual media descriptions (described by "m=" lines")
	and the overall multimedia session. Typically different media types		and the overall multimedia session. Typically different media types
	(audio, video, etc.) described using different media descriptions		(audio, video, etc.) described using different media descriptions
	represent separate RTP sessions that are carried over individual		represent separate RTP sessions that are carried over individual
	transport layer flows. However		transport layer flows. However
	[I-D.ietf-mmusic-sdp-bundle-negotiation] defines a way to use a		[I-D.ietf-mmusic-sdp-bundle-negotiation] defines a way to use a
	skipping to change at page 28, line 25 ¶		skipping to change at page 28, line 25 ¶
	+------------+-----------------------+-------+--------------+		+------------+-----------------------+-------+--------------+
	| Name | Notes | Level | Mux Category |		| Name | Notes | Level | Mux Category |
	+------------+-----------------------+-------+--------------+		+------------+-----------------------+-------+--------------+
	| msrp-cema | Refer to notes below | M | TBD |		| msrp-cema | Refer to notes below | M | TBD |
	| | | | |		| | | | |
	+------------+-----------------------+-------+--------------+		+------------+-----------------------+-------+--------------+
	5.26 RFC6714 Attribute Analysis		5.26 RFC6714 Attribute Analysis
	NOTE: As per section 9.1 of [I-D.ietf-mmusic-sdp-bundle-negotiation],		NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
	there exists no publicly available specification that defines		there exists no publicly available specification that defines
	procedures for multiplexing/demultiplexing MRSP flows over a single		procedures for multiplexing/demultiplexing MRSP flows over a single
	5-tuple. Once such a specification is available, the multiplexing		5-tuple. Once such a specification is available, the multiplexing
	categories assignments for the attributes in this section could be		categories assignments for the attributes in this section could be
	revisited.		revisited.
	5.27. RFC4583: SDP Format for BFCP Streams		5.27. RFC4583: SDP Format for BFCP Streams
	[RFC4583] document specifies how to describe Binary Floor Control		[RFC4583] document specifies how to describe Binary Floor Control
	Protocol (BFCP) streams in SDP descriptions. User agents using the		Protocol (BFCP) streams in SDP descriptions. User agents using the
	offer/answer model to establish BFCP streams use this format in their		offer/answer model to establish BFCP streams use this format in their
	offers and answers.		offers and answers.
	+------------+---------------------------------+-------+------------+		+------------+-----------------------+-------+--------------+
	| Name | Notes | Level | Mux |		| Name | Notes | Level | Mux Category |
	| | | | Category |		+------------+-----------------------+-------+--------------+
	+------------+---------------------------------+-------+------------+		| floorctrl | Refer to notes below | M | TBD |
	| floorctrl | The attribute MUST be repeated | M | IDENTICAL |		| | | | |
	| | across all the multiplexed "m=" | | |		| confid | Not Impacted | M | NORMAL |
	| | lines | | |		| | | | |
	| | | | |		| userid | Not Impacted | M | NORMAL |
	| confid | Not Impacted | M | NORMAL |		| | | | |
	| | | | |		| floorid | Not Impacted | M | NORMAL |
	| userid | Not Impacted | M | NORMAL |		| | | | |
	| | | | |		+------------+-----------------------+-------+--------------+
	| floorid | Not Impacted | M | NORMAL |
	| | | | |
	+------------+---------------------------------+-------+------------+
	5.27 RFC4583 Attribute Analysis		5.27 RFC4583 Attribute Analysis
			NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
			there exists no publicly available specification that defines
			procedures for multiplexing/demultiplexing BFCP streams over a single
			5-tuple. Once such a specification is available, the multiplexing
			categories assignments for the attributes in this section could be
			revisited.
	5.28. RFC5547: SDP Offer/Answer for File Transfer		5.28. RFC5547: SDP Offer/Answer for File Transfer
	[RFC5547] provides a mechanism to negotiate the transfer of one or		[RFC5547] provides a mechanism to negotiate the transfer of one or
	more files between two endpoints by using the SDP offer/answer model		more files between two endpoints by using the SDP offer/answer model
	specified in [RFC3264].		specified in [RFC3264].
	+-------------------+-----------------------+-------+--------------+		+-------------------+-----------------------+-------+--------------+
	| Name | Notes | Level | Mux Category |		| Name | Notes | Level | Mux Category |
	+-------------------+-----------------------+-------+--------------+		+-------------------+-----------------------+-------+--------------+
	| file-selector | Refer to notes below | M | TBD |		| file-selector | Refer to notes below | M | TBD |
	skipping to change at page 29, line 48 ¶		skipping to change at page 29, line 37 ¶
	| file-date | Refer to notes below | M | TBD |		| file-date | Refer to notes below | M | TBD |
	| | | | |		| | | | |
	| file-icon | Refer to notes below | M | TBD |		| file-icon | Refer to notes below | M | TBD |
	| | | | |		| | | | |
	| file-range | Refer to notes below | M | TBD |		| file-range | Refer to notes below | M | TBD |
	| | | | |		| | | | |
	+-------------------+-----------------------+-------+--------------+		+-------------------+-----------------------+-------+--------------+
	5.28 RFC5547 Attribute Analysis		5.28 RFC5547 Attribute Analysis
	NOTE: As per section 9.1 of [I-D.ietf-mmusic-sdp-bundle-negotiation],		NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
	there exists no publicly available specification that defines		there exists no publicly available specification that defines
	procedures for multiplexing/demultiplexing MRSP flows over a single		procedures for multiplexing/demultiplexing MRSP flows over a single
	5-tuple. Once such a specification is available, the multiplexing		5-tuple. Once such a specification is available, the multiplexing
	categories assignments for attributes in this section could be		categories assignments for attributes in this section could be
	revisited.		revisited.
	5.29. RFC6849: SDP and RTP Media Loopback Extension		5.29. RFC6849: SDP and RTP Media Loopback Extension
	[RFC6849] adds new SDP media types and attributes, which enable		[RFC6849] adds new SDP media types and attributes, which enable
	establishment of media sessions where the media is looped back to the		establishment of media sessions where the media is looped back to the
	skipping to change at page 49, line 45 ¶		skipping to change at page 48, line 45 ¶
	| T38ModemType | Refer to notes | M | TBD |		| T38ModemType | Refer to notes | M | TBD |
	| | below | | |		| | below | | |
	| | | | |		| | | | |
	| T38VendorInfo | Refer to notes | M | TBD |		| T38VendorInfo | Refer to notes | M | TBD |
	| | below | | |		| | below | | |
	| | | | |		| | | | |
	+------------------------+--------------------+-------+-------------+		+------------------------+--------------------+-------+-------------+
	5.54 ITU T.38 Attribute Analysis		5.54 ITU T.38 Attribute Analysis
	NOTE: As per section 9.1 of [I-D.ietf-mmusic-sdp-bundle-negotiation],		NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
	there exists no publicly available specification that defines		there exists no publicly available specification that defines
	procedures for multiplexing/demultiplexing fax protocols flows over a		procedures for multiplexing/demultiplexing fax protocols flows over a
	single 5-tuple. Once such a specification is available, the		single 5-tuple. Once such a specification is available, the
	multiplexing category assignments for the attributes in this section		multiplexing category assignments for the attributes in this section
	could be revisited.		could be revisited.
	5.55. ITU-T Q.1970		5.55. ITU-T Q.1970
	[Q.1970] defines Bearer Independent Call Control (BICC) IP bearer		[Q.1970] defines Bearer Independent Call Control (BICC) IP bearer
	control protocol.		control protocol.
	skipping to change at page 52, line 25 ¶		skipping to change at page 51, line 25 ¶
	| max-size | Refer to notes | M | TBD |		| max-size | Refer to notes | M | TBD |
	| | below | | |		| | below | | |
	| | | | |		| | | | |
	| path | Refer to notes | M | TBD |		| path | Refer to notes | M | TBD |
	| | below | | |		| | below | | |
	| | | | |		| | | | |
	+-----------------------+---------------------+-------+-------------+		+-----------------------+---------------------+-------+-------------+
	5.57 RFC4975 Attribute Analysis		5.57 RFC4975 Attribute Analysis
	NOTE: As per section 9.1 of [I-D.ietf-mmusic-sdp-bundle-negotiation],		NOTE: As per section 9 of [I-D.ietf-mmusic-sdp-bundle-negotiation],
	there exists no publicly available specification that defines		there exists no publicly available specification that defines
	procedures for multiplexing/demultiplexing MRSP flows over a single		procedures for multiplexing/demultiplexing MRSP flows over a single
	5-tuple. Once such a specification is available, the multiplexing		5-tuple. Once such a specification is available, the multiplexing
	categories assignments for the attributes in this section could be		categories assignments for the attributes in this section could be
	revisited.		revisited.
	5.58. Historical Attributes		5.58. Historical Attributes
	This section specifies analysis for the attributes that are included		This section specifies analysis for the attributes that are included
	for historic usage alone by the [IANA].		for historic usage alone by the [IANA].
	skipping to change at page 77, line 5 ¶		skipping to change at page 76, line 5 ¶
	| gc | CAUTION |		| gc | CAUTION |
	| profileDesc | CAUTION |		| profileDesc | CAUTION |
	| vsel | CAUTION |		| vsel | CAUTION |
	| dsel | CAUTION |		| dsel | CAUTION |
	| fsel | CAUTION |		| fsel | CAUTION |
	| onewaySel | CAUTION |		| onewaySel | CAUTION |
	| codecconfig | CAUTION |		| codecconfig | CAUTION |
	| isup_usi | CAUTION |		| isup_usi | CAUTION |
	| uiLayer1_Prot | CAUTION |		| uiLayer1_Prot | CAUTION |
	| chain | CAUTION |		| chain | CAUTION |
	| floorctrl | IDENTICAL |		| floorctrl | TBD |
	| confid | NORMAL |		| confid | NORMAL |
	| userid | NORMAL |		| userid | NORMAL |
	| floorid | NORMAL |		| floorid | NORMAL |
	| FEC | NORMAL |		| FEC | NORMAL |
	| accept-types | TBD |		| accept-types | TBD |
	| accept-wrapped-types | TBD |		| accept-wrapped-types | TBD |
	| max-size | TBD |		| max-size | TBD |
	| path | TBD |		| path | TBD |
	| dccp-service-code | CAUTION |		| dccp-service-code | CAUTION |
	| rtcp-mux | IDENTICAL |		| rtcp-mux | IDENTICAL |
	skipping to change at page 84, line 50 ¶		skipping to change at page 83, line 50 ¶
	review.		review.
	Thanks to Ben Campbell for AD review suggestions. Thanks to Spencer		Thanks to Ben Campbell for AD review suggestions. Thanks to Spencer
	Dawkins, Stephen Farrel, Alissa Cooper, Mirja Kuehlewind and the		Dawkins, Stephen Farrel, Alissa Cooper, Mirja Kuehlewind and the
	entire IESG experts for their reviews.		entire IESG experts for their reviews.
	18. Change Log		18. Change Log
	[RFC EDITOR NOTE: Please remove this section when publishing]		[RFC EDITOR NOTE: Please remove this section when publishing]
			Changes draft-ietf-mmusic-sdp-mux-attributes-15
			o Updated Mux category for floorctrl to TBD
	Changes draft-ietf-mmusic-sdp-mux-attributes-14		Changes draft-ietf-mmusic-sdp-mux-attributes-14
	o Incorporated Comments from IESG review :		o Incorporated Comments from IESG review :
	* Updated security considerations section to fix the		* Updated security considerations section to fix the
	incositencies (Spencer's review)		incositencies (Spencer's review)
	* Updated section 5.36 to align the text with 5.39 (Stephen's		* Updated section 5.36 to align the text with 5.39 (Stephen's
	review)		review)
End of changes. 20 change blocks.
	119 lines changed or deleted		126 lines changed or added
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