Internet DRAFT - draft-meuric-ccamp-tsvmode-signaling
draft-meuric-ccamp-tsvmode-signaling
Network Working Group J. Meuric, Ed.
Internet-Draft E. Le Rouzic
Updates: RFC7689 (if approved) Orange
Intended status: Standards Track G. Galimberti
Expires: 25 April 2024 Individual
23 October 2023
Conveying Transceiver-Related Information within RSVP-TE Signaling
draft-meuric-ccamp-tsvmode-signaling-04
Abstract
The ReSource reserVation Protocol with Traffic Engineering extensions
(RSVP-TE) allows to carry optical information so as to set up
channels over Wavelength Division Multiplexing (WDM) networks between
a pair of transceivers. Nowadays, there are many transceivers that
not only support tunable lasers, but also multiple modulation
formats. This memo leverages the Generalized Multiprotocol Label
Switching protocol extensions to support the signaling of the
associated information as a "mode" parameter within a "transceiver
type" context.
Requirements Language
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 RFC 2119 [RFC2119].
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 https://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 25 April 2024.
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Copyright Notice
Copyright (c) 2023 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 (https://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 Revised BSD License text as
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provided without warranty as described in the Revised BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Main Use Cases . . . . . . . . . . . . . . . . . . . . . . . 3
2.1. Single Control Domain . . . . . . . . . . . . . . . . . . 3
2.2. Open Line Systems . . . . . . . . . . . . . . . . . . . . 4
3. Signaling Messages . . . . . . . . . . . . . . . . . . . . . 5
3.1. Encodings . . . . . . . . . . . . . . . . . . . . . . . . 5
3.1.1. WDM-Transceiver-Mode Sub-TLV . . . . . . . . . . . . 5
3.1.2. WDM-Transceiver-Param Sub-TLV . . . . . . . . . . . . 6
3.2. Processing . . . . . . . . . . . . . . . . . . . . . . . 8
3.2.1. Downstream Direction . . . . . . . . . . . . . . . . 8
3.2.2. Upstream Direction . . . . . . . . . . . . . . . . . 8
3.3. Firm State Behavior . . . . . . . . . . . . . . . . . . . 9
4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 9
5. Security Considerations . . . . . . . . . . . . . . . . . . . 11
6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 11
7. Contributors . . . . . . . . . . . . . . . . . . . . . . . . 11
8. References . . . . . . . . . . . . . . . . . . . . . . . . . 11
8.1. Normative References . . . . . . . . . . . . . . . . . . 11
8.2. Informative References . . . . . . . . . . . . . . . . . 13
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 14
1. Introduction
The ITU-T's recommendation [G.694.1] defines the flexi-grid
technology as the latest evolution of the WDM data plane. [RFC7689]
defines the extensions to the RSVP-TE signaling ([RFC3473]) to
provision lightpaths in WDM networks, from transceiver to
transceiver, including transit Reconfigurable Optical Add-Drop
Multiplexers (ROADMs). [RFC7792] specifies the encoding of the flex-
grid label to be carried within RSVP-TE signaling messages,
leveraging the reconfiguration capability of optical switches and the
wavelength tunability of the transceivers at both ends of the optical
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signal.
To address the various requirements of optical networks, some
transceivers are supporting multiple modulation formats, baudrates,
FECs, etc. This capability enables to select at setup time the right
trade-off between bitrate, baudrate, reach, spectral width, etc.
This memo defines the required fields to explicitly addresses this
case of "elastic" transceivers. Two options are proposed to address
this issue. The first extension relies on a two-stage identifier: a
Transceiver Type, allowing to summarize the set of capabilities and
consistently correlate both ends of a given optical channel, and a
Transceiver ModeID, i.e. a hardware-related identifier to be
interpreted within the Type context. The second extension replaces
the aforementioned ModeID by a set of optical parameters. In the
latter, the exact list of fields will follow
[I-D.ietf-ccamp-dwdm-if-param-yang]
2. Main Use Cases
In the following section, it is assumed that, to be able to meet
optical performance requirements, the Routing and Wavelength
Assignment (RWA) tasks are performed before the signaling messages
leave the ingress ROADM. This could happen in various ways, provided
the network topology is available, including optical parameters
(e.g., advertised using [I-D.ietf-ccamp-wson-iv-encode]). This
includes ROADM-local computation process, passive PCE responding to
the ingress ROADM's request [I-D.ietf-pce-wson-rwa-ext]), as well
centralized controllers relying on PCEP to trigger the RSVP-TE
signaling in the ingress node ([RFC8281]).
2.1. Single Control Domain
We consider that transceivers are in the same control domain as the
optical switches. In many deployments, transceivers are embedded in
the edge ROADM shelves, where both the transceiver and the optical
switching are configured by the same set of local control processes.
In this case, carrying the Mode parameter in RSVP-TE signaling is
required to configure the egress side of the signaling session. Even
though some receiver implementations may be able to detect the
modulation format without configuration, most operational deployments
rely on bidirectional signals, thus making a large set of signal
parameters a mandatory information to fully configure the egress
transceiver in most cases. As a result, the transceiver mode
attributes needs to be conveyed up to both devices at the ends of the
LSP.
The specification below allows to address this use case.
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2.2. Open Line Systems
We now consider that transceivers are installed in shelves
independent from the ROADMs. The set of ROADMs is referred to as the
"optical line", the shelves carrying the transceivers are named
"client devices". This use case is aligned with the problem
statement specified in [I-D.ietf-ccamp-dwdm-if-mng-ctrl-fwk] and is
consistent with [RFC7698].
--Path--> --Path--> --Path-->
___ _ _ _ _ _ _ ___
___ | |/ _ _ _ ___ \| | ___
| |____| |_ _ _ \| | | |____| |
|___| | | | | | | |___|
Ti |___|\_ _ _ | |_____/|___| Te
Ri _ _ _/|___| Re
<--Resv-- <--Resv-- R <--Resv--
Figure 1: Transceivers (Ti, Te) Connected to an Open Line System
T is a transceiver shelf.
R is a ROADM. Only edge ROADMs are depicted here but le line system
is typically a mesh of multiple ROADMs and amplifiers.
From the signaling perspective, T and R are refered to as Ti/Ri (Te/
Re) to identify the ingress end (egress end, respectively).
The network topology and the associated optical parameters are only
advertised among the ROADMs, part of the line system, i.e. the
topology information does not leak up to the transceiver shelves
(otherwise, that is a specific case of
// Section 2.1). Therefore, beyond the usual signaling features, the
resulting signaling messages serve 3 additional purposes:
* advertise the ingress Transceiver Type to the optical line, in
charge of the decision related to the optical path across the
network,
* convey the Transceiver Type up to the egress Transceiver, allowing
to check correct match between both ends (as in
// Section 2.1),
* inform transceivers at both ends about the Transceiver Mode,
either allocated by the optical line or forced from the signaling
head end.
The specification below allows to address this use case.
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3. Signaling Messages
The following sections specify the fields used in the RSVP-TE Path
and Resv messages to address the requirements above.
3.1. Encodings
This documents specifies two sub-TLVs. Both serve the same purpose,
with a different level of details: the transceiver mode is described
either using an identifier or a detailed set of parameters. As a
result, an RSVP-TE message SHOULD only carry one of the sub-TLV for a
given hop. In case several of the sub-TLVs below are included, the
first one takes precedence and the following ones are ignored.
3.1.1. WDM-Transceiver-Mode Sub-TLV
This document introduces the WDM-Transceiver-Mode sub-TLV so as to
carry the Transceiver's Type and Mode. It aims at carrying the
information associated to "Standard Modes" and "Organizational Modes"
defined in section 2.5 of
[I-D.ietf-ccamp-optical-impairment-topology-yang]. It has the
following format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = TBD1 | Length = 20 | Reserved |AppID Type=TBD6|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| EUI |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| EUI (cont'd) | Tsv-Type |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tsv-Mode | Channel Output Power |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Application ID Type (8 bits): As per section 5 of
[I-D.ietf-ccamp-dwdm-if-lmp], this field allows to distinguish
between the possible encodings of the trailing "Application ID"
field. This specification defines a new Application ID Type (value
TBD6) that extends the "Proprietary" type and specifies specific
fields within the "value" bytes:
* the first 6 bytes of the Application Identifier must contain the
hexadecimal representation of an Extended Unique Identifier (EUI),
knowing that the first 3 bytes map to the Organizationally Unique
Identifier (OUI) and the 3 remaining ones are allocated by the
OUI-owner;
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* the following 2 bytes encode a Tsv-Mode;
* the following 4 bytes encode a Tsv-Type;
* the last 4 bytes carry the Channel Output Power.
Tsv-Type (16 bits): A transponder-specific value allowing to identify
a compatible Tsv-Type at the remote end, and supporting a set of
optical Tsv-Modes. This value MUST be included by the ingress
transceiver, i.e. from the signaling first hop. 0 is a Reserved value
that MUST trigger a PathErr message in response, with Error Code 24
(Routing Problem) and Error Sub-code TBD3 ("Unsupported Tsv-Type").
The Tsv-Type is an organization-specific information and, as such,
must be interpreted in the context of the EUI field.
Tsv-Mode (16 bits): Within a given Tsv-Type, this ID allows to
specify how the transceiver should be configured among the set of
options supported by Tsv-Type; e.g. optical modulation format or
baudrate. The value 0 means that the sending device has not chosen a
particular Tsv-Mode and expects this information to be determined by
a downstream node (e.g., the ingress ROADM of the optical line). If
the Tsv-Type resolves into a single Tsv-Mode, the Tsv-Mode field
SHOULD use a non-zero value and MAY be ignored. A transceiver
receiving a Tsv-Mode with the value 0 MAY select a mode based on
local policies combined to other signaling information, e.g. channel
spectral width.
Channel Ouput Power (16 bits): A floating point value specifying the
signal power coming out of the transceiver in dBm. The value
FFFFFFFF means "unspecified". If a transceiver receives an
unspecified value, its data plane SHOULD be configured according to
its local policy (e.g. fixed or default value).
This specification is consistent
[I-D.ietf-ccamp-optical-impairment-topology-yang]: the EUI field maps
the the "organization-identifier" transceiver attribute and the
combination of the Tsv-Type and the Tsv-Mode perfectly fit into the
"operational-mode" attribute.
3.1.2. WDM-Transceiver-Param Sub-TLV
This document introduces the WDM-Transceiver-Param sub-TLV so as to
carry the Transceiver Type identifier and a minimum set of attributes
from the "Explicit Modes" parameters, as described in section 2.5.3
of [I-D.ietf-ccamp-optical-impairment-topology-yang]. It is aligned
on figure 3 in [I-D.ggalimbe-ccamp-flexigrid-carrier-label] and has
the following format:
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0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = TBD | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Baud-rate |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Min OSNR | Reserved |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Min Carrier Spacing | Roll-off |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Tx Min Channel Power | Tx Max Channel Power |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Rx Min Channel Power | Rx Max Channel Power |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Rx Max Total Power | Channel Output Power |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Operational Mode |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
// Optional sub-TLVs //
| |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length (16 bits): default is 32, i.e. without sub-TLVs, otherwise to
be adjusted accordingly.
Baud-rate (32 bits): A nonnegative integer specifying the number of
symbols per second.
Min OSNR (16 bits): An integer specifying the minimum accepted
threshold for the Optical Signal-Noise Ratio in 0.1 nm.
Min Carrier Spacing (16 bits): A half-precision floating point number
describing the required spectrum width to carry the emitted signal.
Roll-off (16 bits): A half-precision floating point number refering
to the edges of the signal spectral shape.
Tx/Rx Min/Max Channel Power (16 bits x 4): A half-precision floating
point number describing the range of supported power values on
emitter (Tx) and receiver (Rx) in dBm.
Rx Max Total Power (16 bits): A half-precision floating point number
describing the maximum received power threshold in dBm.
Channel Output Power (16 bits): cf. Section 3.1.1.
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Operational Mode (32 bits): A transceiver-related value allowing to
identify a compatible mode at the remote end. This field MAY be set
to 0, which is a reserved value to disable Mode checking between end
transceivers (e.g. pair of identical transponders with fixed mode).
Other parameters listed in
[I-D.ietf-ccamp-optical-impairment-topology-yang] can be included
using optional sub-TLVs (TBD).
3.2. Processing
3.2.1. Downstream Direction
The parameters to be used by the egress transceivers are carried in
Path messages. In RSVP-TE signaling, hop-specific information is
encoded within the ERO as hop attributes and WDM parameters are to be
carried as sub-TLVs within the Type 4 TLV of the Hop Attribute
subobject [RFC7689].
When sending a Path message, if a signaling head end node includes
one of the WDM-Transceiver sub-TLVs specified in this document, the
entity in charge of the path computation (e.g. the ingress ROADM)
MUST include (unless an error is raised), as part of the ERO
population step, the same sub-TLV to specify the Hop Attibutes of the
tail end transceiver, allowing this information to be propagated
along the RSVP-TE Path messages.
A signaling head end node sending a Path message including one of the
WDM-Transceiver sub-TLVs specified in the previous section with
unallocated values, i.e. Mode-defining fields set to 0 (e.g. "Tsv-
Mode = 0" in the WDM-Transceiver-Mode sub-TLV), MUST include an empty
RRO to request its population by some downstream nodes [RFC3209]. In
case the Mode specification is fully defined before the first
signaling hop (e.g. operator-specified), the use of the RRO remains
OPTIONAL.
3.2.2. Upstream Direction
When the mode selection happens after the signaling has left the
signaling head node, which carries the ingress transceiver, the
selected value needs to be sent back to the head node. As specified
in [RFC7570], it can be included in the Record Route Object (RRO)
within RSVP-TE Resv messages. Starting from the fact that both end
transceivers share a common mode to properly set up a channel, this
leads to the following processing:
* After a transceiver shelf (signaling tail end or regenerator) has
received a Path message:
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- If both an RRO and a WDM-Transceiver sub-TLV (defined above)
are included, the node MUST populate, in the responding Resv
message, the RRO with its own hop attributes, using the
corresponding sub-TLV. At this stage, the values of the Mode-
defining fields MUST be allocated, wherever the selection has
happened (e.g., ingress ROADM, local decision).
- If the Mode description is not supported, the node MUST respond
using a PathErr with Error Code 24 (Routing Problem) and Error
Sub-code TBD4 ("Unsupported Transceiver Mode").
- If the values within the WDM-Transceiver sub-TLV are not
allocated and the node is unable to make a local allocation, it
MUST respond using a PathErr with Error Code 24 (Routing
Problem) and Error Sub-code TBD5 ("Unable to Select Transceiver
Mode")
* When a signaling head end node pending a mode information receives
a Resv message, it MUST look into the RRO and configure itself
consistently with the hop attribute information associated to the
remote transceiver. A signaling head node receiving an
inconsistent Mode (unupported or not matching the corresponding
Path state) MUST respond using a ResvErr with Error Code 24
(Routing Problem) and Error Sub-code TBD4 ("Unsupported
Transceiver Mode").
3.3. Firm State Behavior
In typical deployments of the extensions defined in this document, it
is very likely that transceiver-carrying shelves will use an out-of-
band control network to exchange RSVP-TE messages which does not
necessarily share fate with the data plane. As RSVP-TE is a soft
state protocol, the loss a subsequent refreshes messages may reflect
the health of the control network rather than the state of the data
plane.
As a result, in the event of multiple refresh message losses, an
implementation MAY keep the data plane state which may be still be up
and running, especially if light keeps coming in the receiving
direction. As a corollary, an implementation of this document MAY
keep data plane states until it receives explicit PathTear or
ResvTear messages.
4. IANA Considerations
The IANA is requested to allocate, from the "Sub-TLV Types for WSON
Processing Hop Attribute TLV" section within the "RSVP-TE Parameters"
registry:
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+=======+=======================+============+
| Value | Meaning | Reference |
+=======+=======================+============+
| TDB1 | WDM-Transceiver-Mode | [This I-D] |
+-------+-----------------------+------------+
| TDB2 | WDM-Transceiver-Param | [This I-D] |
+-------+-----------------------+------------+
Table 1
The IANA is requested to allocate, from the "Error Codes and
Globally-Defined Error Value Sub-Codes" section within the "RSVP
Parameters" registry:
+============+==========+==============================+============+
| Error Code | Sub-code | Meaning | Reference |
+============+==========+==============================+============+
| 24 | TBD3 | Unsupported Tsv-Type | [This I-D] |
+------------+----------+------------------------------+------------+
| | TBD4 | Unsupported | [This I-D] |
| | | Transceiver Mode | |
+------------+----------+------------------------------+------------+
| | TBD5 | Unable to Select | [This I-D] |
| | | Transceiver Mode | |
+------------+----------+------------------------------+------------+
Table 2
The IANA is requested to create, within the "GMPLS Signaling
Parameters" registry, two new sub-registries named "WDM Modulation
Types" and "WDM FEC Types".
For both of them:
* the value 0 means "Pending selection",
* the range 1-65503 follows the Expert Review policy for
registration,
* the range 65504-65535 is for experimental use.
The IANA is requested to allocate, from the "Application ID Type"
section within the "LMP" registry:
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+======+===========================+==============================+
| Type | Meaning | Reference |
+======+===========================+==============================+
| TBA | G.698.2 | [I-D.ietf-ccamp-dwdm-if-lmp] |
+------+---------------------------+------------------------------+
| TBA | OUI + proprietary value | [I-D.ietf-ccamp-dwdm-if-lmp] |
+------+---------------------------+------------------------------+
| TBD6 | EUI + Tsv-Type + Tsv-Mode | [This document] |
+------+---------------------------+------------------------------+
Table 3
5. Security Considerations
This specification only adds TLVs to RSVP-TE signaling messages. As
a result, it relies on security guidelines documented in [RFC5920].
6. Acknowledgements
The authors would like to thank Sergio Belotti and Dieter Beller for
their suggestions and Ramon Casellas for his valuable feedback on the
work related to this document.
7. Contributors
Luay Alahdab, individual
luayahdab@gmail.com
8. References
8.1. Normative References
[I-D.ggalimbe-ccamp-flexigrid-carrier-label]
Galimberti, G., Fauci, D. L., Zanardi, A., Galvagni, L.,
and J. Meuric, "Signaling extensions for Media Channel
sub-carriers configuration in Spectrum Switched Optical
Networks (SSON) in Lambda Switch Capable (LSC) Optical
Line Systems.", Work in Progress, Internet-Draft, draft-
ggalimbe-ccamp-flexigrid-carrier-label-15, 25 July 2023,
<https://datatracker.ietf.org/doc/html/draft-ggalimbe-
ccamp-flexigrid-carrier-label-15>.
[I-D.ietf-ccamp-dwdm-if-lmp]
Hiremagalur, D., Grammel, G., Galimberti, G., Kunze, R.,
and D. Beller, "Extension to the Link Management Protocol
(LMP/DWDM -rfc4209) for Dense Wavelength Division
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Multiplexing (DWDM) Optical Line Systems to manage the
application code of optical interface parameters in DWDM
application", Work in Progress, Internet-Draft, draft-
ietf-ccamp-dwdm-if-lmp-08, 25 July 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
dwdm-if-lmp-08>.
[I-D.ietf-pce-wson-rwa-ext]
Lee, Y. and R. Casellas, "The Path Computation Element
Communication Protocol (PCEP) Extension for Wavelength
Switched Optical Network (WSON) Routing and Wavelength
Assignment (RWA)", Work in Progress, Internet-Draft,
draft-ietf-pce-wson-rwa-ext-17, 1 March 2019,
<https://datatracker.ietf.org/doc/html/draft-ietf-pce-
wson-rwa-ext-17>.
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC3209] Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V.,
and G. Swallow, "RSVP-TE: Extensions to RSVP for LSP
Tunnels", RFC 3209, DOI 10.17487/RFC3209, December 2001,
<https://www.rfc-editor.org/info/rfc3209>.
[RFC3473] Berger, L., Ed., "Generalized Multi-Protocol Label
Switching (GMPLS) Signaling Resource ReserVation Protocol-
Traffic Engineering (RSVP-TE) Extensions", RFC 3473,
DOI 10.17487/RFC3473, January 2003,
<https://www.rfc-editor.org/info/rfc3473>.
[RFC5920] Fang, L., Ed., "Security Framework for MPLS and GMPLS
Networks", RFC 5920, DOI 10.17487/RFC5920, July 2010,
<https://www.rfc-editor.org/info/rfc5920>.
[RFC7570] Margaria, C., Ed., Martinelli, G., Balls, S., and B.
Wright, "Label Switched Path (LSP) Attribute in the
Explicit Route Object (ERO)", RFC 7570,
DOI 10.17487/RFC7570, July 2015,
<https://www.rfc-editor.org/info/rfc7570>.
[RFC7689] Bernstein, G., Ed., Xu, S., Lee, Y., Ed., Martinelli, G.,
and H. Harai, "Signaling Extensions for Wavelength
Switched Optical Networks", RFC 7689,
DOI 10.17487/RFC7689, November 2015,
<https://www.rfc-editor.org/info/rfc7689>.
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[RFC7792] Zhang, F., Zhang, X., Farrel, A., Gonzalez de Dios, O.,
and D. Ceccarelli, "RSVP-TE Signaling Extensions in
Support of Flexi-Grid Dense Wavelength Division
Multiplexing (DWDM) Networks", RFC 7792,
DOI 10.17487/RFC7792, March 2016,
<https://www.rfc-editor.org/info/rfc7792>.
[RFC8281] Crabbe, E., Minei, I., Sivabalan, S., and R. Varga, "Path
Computation Element Communication Protocol (PCEP)
Extensions for PCE-Initiated LSP Setup in a Stateful PCE
Model", RFC 8281, DOI 10.17487/RFC8281, December 2017,
<https://www.rfc-editor.org/info/rfc8281>.
8.2. Informative References
[I-D.ietf-ccamp-dwdm-if-mng-ctrl-fwk]
Kunze, R., Grammel, G., Beller, D., Galimberti, G., and J.
Meuric, "A framework for Management and Control of DWDM
optical interface parameters", Work in Progress, Internet-
Draft, draft-ietf-ccamp-dwdm-if-mng-ctrl-fwk-13, 24 July
2019, <https://datatracker.ietf.org/doc/html/draft-ietf-
ccamp-dwdm-if-mng-ctrl-fwk-13>.
[I-D.ietf-ccamp-dwdm-if-param-yang]
Galimberti, G., Kunze, R., Hiremagalur, D., and G.
Grammel, "A YANG model to manage the optical interface
parameters for an external transponder in a WDM network",
Work in Progress, Internet-Draft, draft-ietf-ccamp-dwdm-
if-param-yang-09, 13 March 2023,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
dwdm-if-param-yang-09>.
[I-D.ietf-ccamp-optical-impairment-topology-yang]
Beller, D., Le Rouzic, E., Belotti, S., Galimberti, G.,
and I. Busi, "A YANG Data Model for Optical Impairment-
aware Topology", Work in Progress, Internet-Draft, draft-
ietf-ccamp-optical-impairment-topology-yang-13, 10 July
2023, <https://datatracker.ietf.org/doc/html/draft-ietf-
ccamp-optical-impairment-topology-yang-13>.
[I-D.ietf-ccamp-wson-iv-encode]
Martinelli, G., Lee, Y., Galimberti, G., and F. Zhang,
"Information Encoding for WSON with Impairments
Validation", Work in Progress, Internet-Draft, draft-ietf-
ccamp-wson-iv-encode-02, 4 January 2019,
<https://datatracker.ietf.org/doc/html/draft-ietf-ccamp-
wson-iv-encode-02>.
Meuric, Ed., et al. Expires 25 April 2024 [Page 13]
Internet-Draft Transponder Info in RSVP-TE October 2023
[RFC7698] Gonzalez de Dios, O., Ed., Casellas, R., Ed., Zhang, F.,
Fu, X., Ceccarelli, D., and I. Hussain, "Framework and
Requirements for GMPLS-Based Control of Flexi-Grid Dense
Wavelength Division Multiplexing (DWDM) Networks",
RFC 7698, DOI 10.17487/RFC7698, November 2015,
<https://www.rfc-editor.org/info/rfc7698>.
Authors' Addresses
Julien Meuric (editor)
Orange
2 avenue Pierre Marzin
22300 Lannion
France
Email: julien.meuric@orange.com
Esther Le Rouzic
Orange
2 avenue Pierre Marzin
22300 Lannion
France
Email: esther.lerouzic@orange.com
Gabriele Galimberti
Individual
Email: ggalimbe56@gmail.com
Meuric, Ed., et al. Expires 25 April 2024 [Page 14]