rfc9801v2.txt		rfc9801.txt
	skipping to change at line 177 ¶		skipping to change at line 177 ¶
	MS-AIS: Multiplex Section AIS		MS-AIS: Multiplex Section AIS
	BITS: Building Integrated Timing Supply [ATIS-0900105.09.2013]		BITS: Building Integrated Timing Supply [ATIS-0900105.09.2013]
	CBR: Constant Bit Rate		CBR: Constant Bit Rate
	CE: Customer Edge		CE: Customer Edge
	CEP: Circuit Emulation over Packet [RFC4842]		CEP: Circuit Emulation over Packet [RFC4842]
			CSID: Compressed SID
	CSRC: Contributing Source [RFC3550]		CSRC: Contributing Source [RFC3550]
	DEG: Degradation		DEG: Degradation
	ES: Errored Second		ES: Errored Second
	FEC: Forward Error Correction		FEC: Forward Error Correction
	ICMP: Internet Control Message Protocol [RFC4443]		ICMP: Internet Control Message Protocol [RFC4443]
	skipping to change at line 932 ¶		skipping to change at line 934 ¶
	When an MPLS PSN layer is used, a VPWS label provides the		When an MPLS PSN layer is used, a VPWS label provides the
	demultiplexing mechanism (as described in Section 5.4.2 of		demultiplexing mechanism (as described in Section 5.4.2 of
	[RFC3985]). The PSN tunnel can be a simple best-path LSP established		[RFC3985]). The PSN tunnel can be a simple best-path LSP established
	using LDP (see [RFC5036]) or Segment Routing (SR) (see [RFC8402]); or		using LDP (see [RFC5036]) or Segment Routing (SR) (see [RFC8402]); or
	it can be a traffic-engineered LSP established using RSVP-TE (see		it can be a traffic-engineered LSP established using RSVP-TE (see
	[RFC3209]) or SR policies (see [RFC9256]).		[RFC3209]) or SR policies (see [RFC9256]).
	When an SRv6 PSN layer is used, an SRv6 service SID (as defined in		When an SRv6 PSN layer is used, an SRv6 service SID (as defined in
	[RFC8402]) provides the demultiplexing mechanism and definitions of		[RFC8402]) provides the demultiplexing mechanism and definitions of
	Section 6 of [RFC9252] apply. Both SRv6 service SIDs with the full		Section 6 of [RFC9252] apply. Both SRv6 service SIDs with the full
	IPv6 address format defined in [RFC8986] and compressed SIDs (C-SIDs)		IPv6 address format defined in [RFC8986] and CSIDs with the format
	with the format defined in [RFC9800] can be used.		defined in [RFC9800] can be used.
	5.1.1. New SRv6 Behaviors		5.1.1. New SRv6 Behaviors
	Two new encapsulation behaviors, H.Encaps.L1 and H.Encaps.L1.Red, are		Two new encapsulation behaviors, H.Encaps.L1 and H.Encaps.L1.Red, are
	defined in this document. The behavior procedures are applicable to		defined in this document. The behavior procedures are applicable to
	both SIDs and C-SIDs.		both SIDs and CSIDs.
	The H.Encaps.L1 behavior encapsulates a frame received from an IWF in		The H.Encaps.L1 behavior encapsulates a frame received from an IWF in
	an IPv6 packet with a segment routing header (SRH). The received		an IPv6 packet with a segment routing header (SRH). The received
	frame becomes the payload of the new IPv6 packet.		frame becomes the payload of the new IPv6 packet.
	* The next header field of the SRH or the last extension header		* The next header field of the SRH or the last extension header
	present MUST be set to 147.		present MUST be set to 147.
	* The insertion of the SRH MAY be omitted per [RFC8986] when the		* The insertion of the SRH MAY be omitted per [RFC8986] when the
	SRv6 policy only contains one segment and there is no need to use		SRv6 policy only contains one segment and there is no need to use
	skipping to change at line 1024 ¶		skipping to change at line 1026 ¶
	control word or ACH from an IP packet or Ethernet frame. The first		control word or ACH from an IP packet or Ethernet frame. The first
	nibble MUST be set to 0000b to indicate that this header is a control		nibble MUST be set to 0000b to indicate that this header is a control
	word as defined in Section 3 of [RFC4385].		word as defined in Section 3 of [RFC4385].
	The other fields in the control word are used as defined below:		The other fields in the control word are used as defined below:
	L:		L:
	Set by the PE to indicate that data carried in the payload is		Set by the PE to indicate that data carried in the payload is
	invalid due to an attachment circuit fault. The downstream PE		invalid due to an attachment circuit fault. The downstream PE
	MUST send appropriate replacement data. The NSP MAY inject an		MUST send appropriate replacement data. The NSP MAY inject an
	appropriate specific fault propagation signal.		appropriate fault-indication signal.
	R:		R:
	Set by the downstream PE to indicate that the IWF experiences		Set by the downstream PE to indicate that the IWF experiences
	packet loss from the PSN or a server layer backward fault		packet loss from the PSN or a server layer backward fault
	indication is present in the NSP. The R bit MUST be cleared by		indication is present in the NSP. The R bit MUST be cleared by
	the PE once the packet loss state or fault indication has cleared.		the PE once the packet loss state or fault indication has cleared.
	RSV:		RSV:
	These bits are reserved for future use. This field MUST be set to		These bits are reserved for future use. This field MUST be set to
	zero by the sender and ignored by the receiver.		zero by the sender and ignored by the receiver.
	FRG:		FRG:
	These bits MUST be set to zero by the sender and ignored by the		These bits MUST be set to zero by the sender and ignored by the
	receiver as PLE does not use payload fragmentation.		receiver as PLE does not use payload fragmentation.
	LEN:		LEN:
	In accordance with Section 3 of [RFC4385], the length field MUST		In accordance with Section 3 of [RFC4385], the length field MUST
	always be set to zero as there is no padding added to the PLE		always be set to zero as there is no padding added to the PLE
	packet. The preconfigured size of the PLE payload MUST be assumed		packet. The size of the PLE payload MUST be assumed to be as
	to be as described in Section 5.2; if the actual packet size is		described in Section 6; if the actual packet size is inconsistent
	inconsistent with this length, the packet MUST be considered		with this, the packet MUST be considered malformed.
	malformed. To detect malformed packets the default, preconfigured
	or signaled payload size MUST be assumed.
	Sequence number:		Sequence number:
	The sequence number field is used to provide a common PW		The sequence number field is used to provide a common PW
	sequencing function as well as detection of lost packets. It MUST		sequencing function as well as detection of lost packets. It MUST
	be generated in accordance with the rules defined in Section 5.1		be generated in accordance with the rules defined in Section 5.1
	of [RFC3550] and MUST be incremented with every PLE packet being		of [RFC3550] and MUST be incremented with every PLE packet being
	sent.		sent.
	5.2.2. RTP Header		5.2.2. RTP Header
	skipping to change at line 1240 ¶		skipping to change at line 1240 ¶
	equivalent amount of replacement data. The contents of the		equivalent amount of replacement data. The contents of the
	replacement data MAY be locally configurable. By default, all PLE		replacement data MAY be locally configurable. By default, all PLE
	implementations MUST support generation of "0xAA" as replacement		implementations MUST support generation of "0xAA" as replacement
	data. The alternating sequence of 0s and 1s of the "0xAA" pattern		data. The alternating sequence of 0s and 1s of the "0xAA" pattern
	ensures clock synchronization is maintained and, for 64B/66B code-		ensures clock synchronization is maintained and, for 64B/66B code-
	based services, ensures no invalid sync headers are generated. While		based services, ensures no invalid sync headers are generated. While
	sending out the replacement data, the IWF will apply a holdover		sending out the replacement data, the IWF will apply a holdover
	mechanism to maintain the clock.		mechanism to maintain the clock.
	Whenever the VPWS is not operationally up, the CE-bound NSP function		Whenever the VPWS is not operationally up, the CE-bound NSP function
	MUST inject the appropriate specific downstream fault-indication		MUST inject the appropriate downstream fault-indication signal.
	signal.
	Whenever a VPWS comes up, the CE-bound IWF will enter the		Whenever a VPWS comes up, the CE-bound IWF will enter the
	intermediate state, will start receiving PLE packets, and will store		intermediate state, will start receiving PLE packets, and will store
	them in the jitter buffer. The CE-bound NSP function will continue		them in the jitter buffer. The CE-bound NSP function will continue
	to inject the appropriate specific downstream fault-indication signal		to inject the appropriate downstream fault-indication signal until a
	until a preconfigured number of payload s stored in the jitter		preconfigured number of payload s stored in the jitter buffer.
	buffer.
	After the preconfigured amount of payload is present in the jitter		After the preconfigured amount of payload is present in the jitter
	buffer, the CE-bound IWF transitions to the normal operation state,		buffer, the CE-bound IWF transitions to the normal operation state,
	and the content of the jitter buffer is streamed out to the CE in		and the content of the jitter buffer is streamed out to the CE in
	accordance with the required clock. In this state, the CE-bound IWF		accordance with the required clock. In this state, the CE-bound IWF
	MUST perform egress clock recovery.		MUST perform egress clock recovery.
	Considerations for choosing the preconfigured amount of payload		Considerations for choosing the preconfigured amount of payload
	required to be present for transitioning into the normal state:		required to be present for transitioning into the normal state:
	skipping to change at line 1279 ¶		skipping to change at line 1277 ¶
	* [G.825], [G.783], and [G.823] for SDH		* [G.825], [G.783], and [G.823] for SDH
	* [GR253] and [GR499] for SONET		* [GR253] and [GR499] for SONET
	* [G.8261] for synchronous Ethernet		* [G.8261] for synchronous Ethernet
	* [G.8251] for OTN		* [G.8251] for OTN
	Whenever the L bit is set in the PLE control word of a received PLE		Whenever the L bit is set in the PLE control word of a received PLE
	packet, the CE-bound NSP function SHOULD inject the appropriate		packet, the CE-bound NSP function SHOULD inject the appropriate
	specific downstream fault-indication signal instead of streaming out		downstream fault-indication signal instead of streaming out the
	the payload.		payload.
	If the CE-bound IWF detects loss of consecutive packets for a		If the CE-bound IWF detects loss of consecutive packets for a
	preconfigured amount of time (default is 1 millisecond), it enters		preconfigured amount of time (default is 1 millisecond), it enters
	PLOS state and a corresponding defect is declared.		PLOS state and a corresponding defect is declared.
	If the CE-bound IWF detects a PLR above a configurable SD threshold		If the CE-bound IWF detects a PLR above a configurable SD threshold
	for a configurable amount of consecutive 1-second intervals, it		for a configurable amount of consecutive 1-second intervals, it
	enters the DEG state and a corresponding defect is declared. The SD-		enters the DEG state and a corresponding defect is declared. The SD-
	PLR threshold can be defined as a percentage with the default being		PLR threshold can be defined as a percentage with the default being
	15% or absolute packet count for finer granularity for higher rate		15% or absolute packet count for finer granularity for higher rate
	interfaces. Possible values for consecutive intervals are 2..10 with		interfaces. Possible values for consecutive intervals are 2..10 with
	the default 7.		the default 7.
	While the PLOS defect is declared, the CE-bound NSP function MUST		While the PLOS defect is declared, the CE-bound NSP function MUST
	inject the appropriate specific downstream fault-indication signal.		inject the appropriate downstream fault-indication signal. If the
	If the emulated service does not have an appropriate maintenance		emulated service does not have an appropriate maintenance signal
	signal defined, the CE-bound NSP function MAY disable its transmitter		defined, the CE-bound NSP function MAY disable its transmitter
	instead. Also, the PSN-bound IWF SHOULD set the R bit in the PLE		instead. Also, the PSN-bound IWF SHOULD set the R bit in the PLE
	control word of every packet transmitted.		control word of every packet transmitted.
	The CE-bound IWF changes from the PLOS to normal state after the		The CE-bound IWF changes from the PLOS to normal state after the
	preconfigured amount of payload has been received similar to the		preconfigured amount of payload has been received similar to the
	transition from intermediate to normal state.		transition from intermediate to normal state.
	Whenever the R bit is set in the PLE control word of a received PLE		Whenever the R bit is set in the PLE control word of a received PLE
	packet, the PLE performance monitoring statistics SHOULD get updated.		packet, the PLE performance monitoring statistics SHOULD get updated.
End of changes. 9 change blocks.
	19 lines changed or deleted		17 lines changed or added
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