YANG data model for Flexi-Grid Optical Networks
draft-vergara-ccamp-flexigrid-yang-04
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Replaced".
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|---|---|---|---|
| Authors | Universidad Autonoma de Madrid , Daniel Perdices , Victor Lopez , Oscar Gonzalez de Dios , Daniel King , Young Lee , Gabriele Galimberti | ||
| Last updated | 2017-03-06 | ||
| Replaces | draft-vergara-flexigrid-yang | ||
| Replaced by | draft-ietf-ccamp-flexigrid-yang, draft-ietf-ccamp-flexigrid-yang | ||
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draft-vergara-ccamp-flexigrid-yang-04
CCAMP Working Group J.E. Lopez de Vergara
Internet Draft Daniel Perdices
Intended status: Standards Track Universidad Autonoma de Madrid
Expires: September 7, 2017 V. Lopez
O. Gonzalez de Dios
Telefonica I+D/GCTO
D. King
Lancaster University
Y. Lee
Huawei
G. Galimberti
Cisco Photonics Srl
March 6, 2017
YANG data model for Flexi-Grid Optical Networks
draft-vergara-ccamp-flexigrid-yang-04.txt
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Abstract
This document defines a YANG model for managing flexi-grid optical
Networks. The model described in this document is composed of two
submodels: one to define a flexi-grid traffic engineering database,
and other one to describe the flexi-grid paths or media channels.
It is grounded on other defined YANG abstract models.
Table of Contents
1. Introduction .............................................. 2
2. Conventions used in this document ......................... 3
3. Flexi-grid network topology model overview ................ 3
4. Main building blocks....................................... 4
4.1. flexi-grid TED ....................................... 4
4.2. Media-channel/network-media-channel .................. 8
5. Example of use ............................................ 11
6. Formal Syntax ............................................. 12
7. Security Considerations ................................... 12
8. IANA Considerations ....................................... 12
9. References ................................................ 12
9.1. Normative References ................................. 12
9.2. Informative References ............................... 13
10. Contributors ............................................. 13
11. Acknowledgments .......................................... 14
Appendix A. YANG models....................................... 14
A.1. Flexi-grid TED YANG Model ............................ 14
A.1.1. YANG Model - Tree .................................. 14
A.1.2. YANG Model - Code .................................. 16
A.2. Media Channel YANG Model ............................. 26
A.2.1. YANG Model - Tree .................................. 26
A.2.2. YANG Model - Code .................................. 27
A.3. License .............................................. 31
Authors' Addresses ........................................... 32
1. Introduction
Internet-based traffic is dramatically increasing every year.
Moreover, such traffic is also becoming more dynamic. Thus,
transport networks need to evolve from current DWDM systems towards
elastic optical networks, based on flexi-grid transmission and
switching technologies. This technology aims at increasing both
transport network scalability and flexibility, allowing the
optimization of bandwidth usage.
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This document presents a YANG model for flexi-grid objects in the
dynamic optical network, including the nodes, transponders and links
between them, as well as how such links interconnect nodes and
transponders.
The YANG model for flexi-grid [RFC7698] networks allows the
representation of the flexi-grid optical layer of a network, combined
with the underlying physical layer. The model is defined in two YANG
modules:
o Flexi-grid-TED (Traffic Engineering Database): This module defines
all the information needed to represent the flexi-grid optical
node, transponder and link.
o Media-channel: This module defines the whole path from a source
transponder to the destination through a number of intermediate
nodes in the flexi-grid optical network.
This document identifies the flexi-grid components, parameters and
their values, characterizes the features and the performances of the
flexi-grid elements. An application example is provided towards the
end of the document to better understand their utility.
2. Conventions used in this document
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
document are to be interpreted as described in [RFC2119].
In this document, these words will appear with that interpretation
only when in ALL CAPS. Lower case uses of these words are not to be
interpreted as carrying RFC-2119 significance.
In this document, the characters ">>" preceding an indented line(s)
indicates a compliance requirement statement using the key words
listed above. This convention aids reviewers in quickly identifying
or finding the explicit compliance requirements of this RFC.
3. Flexi-grid network topology model overview
YANG is a data modeling language used to model configuration data
manipulated by the NETCONF protocol. Several YANG models have already
been specified for network configurations. For instance, the work in
[I-D.draft-ietf-i2rs-yang-network-topo] has proposed a generic YANG
model for network/service topologies and inventories. The work in
[I-D.draft-ietf-teas-yang-te-topo] presents a data model to
represent, retrieve and manipulate Traffic Engineering (TE)
Topologies. These models serve as base models that other technology
specific models can augment. A YANG model has also been proposed in
[I-D.draft-dharini-ccamp-dwdm-if-yang] to manage single channel
optical interface parameters of DWDM applications, and in
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[I-D.draft-ietf-ccamp-wson-yang] another model has been specified for
the routing and wavelength assignment TE topology in wavelength
switched optical networks (WSONs). None of them are specific for
flexi-grid technology.
Then, as stated before, we propose a model to describe a flexi-grid
topology that is split in two YANG sub-modules:
o Flexi-grid-TED: In order to be compatible with existing
proposals, we augment the definitions contained in
[I-D.draft-ietf-i2rs-yang-network-topo] and
[I-D.draft-ietf-teas-yang-te-topo], by defining the different
elements we can find in a flexi-grid network: a node, a transponder
and a link. For that, each of those elements is defined as a
container that includes a group of attributes. References to the
elements are provided to be later used in the definition of a
media channel. It also includes the data types for the type of
modulation, the flexi-grid technology, the FEC, etc.
o Media-channel: This module defines the whole path from a source
transponder to the destination through a number of intermediate
nodes and links. For this, it takes the information defined before
in the flexi-grid TED.
The following section provides a detailed view of each module.
4. Main building blocks
Subsections below detail each of the defined YANG modules. They are
listed in Appendix A.
4.1. Flexi-grid TED
The description of the three main components, flexi-grid-node,
flexi-grid-transponder and flexi-grid-link is provided below.
flexi-grid-sliceable-transponders are also defined.
<flexi-grid-node> ::= <config> <state>
<flexi-grid-node>: This element designates a node in the
network.
<config> ::= <flexi-grid-node-attributes-config>
<config>: Contains the configuration of a node.
<flexi-grid-node-attributes-config> ::= <list-interface>
<connectivity_matrix>
<flexi-grid-node-attributes-config>: Contains all the
attributes related to the node configuration, such as
its interfaces or its management addresses.
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<list-interface> ::= <name> <port-number>
<input-port> <output-port> <description>
<interface-type>
[<numbered-interface> / <unnumbered-interface>]
<list-interface>: The list containing all the
information of the interfaces.
<name>: Determines the interface name.
<port-number>: Port number of the interface.
<input-port>: Boolean value that defines
whether the interface is input or not.
<output-port>: Boolean value that defines
whether the interface is output or not.
<description>: Description of the usage of
the interface.
<interface-type>: Determines if the interface
is numbered or unnumbered.
<numbered-interface> ::= <n-i-ip-address>
<numbered-interface>: An interface with
its own IP address.
<n-i-ip-address>: Only available if
<interface-type> is "numbered-interface".
Determines the IP address of the interface.
<unnumbered-interface> ::= <u-i-ip-address>
<label>
<unnumbered-interface>: A interface that
needs a label to be unique.
<u-i-ip-address>: Only available if
<interface-type> is "numbered-interface".
Determines the node IP address, which with
the label defines the interface.
<label>: Label that determines the
interface, joint with the node IP address.
<connectivity-matrix> ::= <connections>
<connectivity-matrix>: Determines whether a
connection port in/port out exists.
<connections> ::= <input-port-id>
<output-port-id>
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<flexi-grid-transponder> ::= <transponder-type> <config> <state>
<flexi-grid-transponder>: This item designates a transponder
of a node.
<transponder-type>: Contains the type of the transponder.
<config> ::= <flexi-grid-transponder-attributes-config>
<config>: Contains the configuration of a transponder.
<flexi-grid-transponder-attributes-config> ::=
<available-modulation> <modulation-type>
<available-FEC> <FEC-enabled> [<FEC-type>]
<flexi-grid-transponder-attributes>: Contains all the
attributes related to the transponder, such as whether
it has FEC enabled or not, or its modulation type.
<available-modulation>: It provides a list of the
modulations available at this transponder.
<modulation-type>: Determines the type of modulation
in use: QPSK, QAM16, QAM64...
<available-FEC>: It provides a list of the FEC
algorithms available at this transponder.
<FEC-enabled>: Boolean value that determines whether
is the FEC enabled or not.
<FEC-type>: Determines the type of FEC in use:
reed-solomon, hamming-code, enum golay, BCH...
<state> ::= <flexi-grid-transponder-attributes-config>
<flexi-grid-transponder-attributes-state>
<state>: Contains the state of a transponder.
<flexi-grid-transponder-attributes-config>: See above.
<flexi-grid-transponder-attributes-state>: Contains the
state of a transponder.
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<flexi-grid-sliceable-transponder> ::= <transponder-type> <config>
<state>
<flexi-grid-sliceable-transponder>: A list of transponders.
<transponder-type>: Contains the type of the transponder.
<config> ::= <flexi-grid-transponder-attributes-config>
<flexi-grid-sliceable-transponder-attributes-config>
<flexi-grid-transponder-attributes-config>: See above.
<flexi-grid-sliceable-transponder-attributes-config> ::=
<transponder-list>
<flexi-grid-sliceable-transponder-attributes-config>:
Contains the configuration of a sliceable transponder
<transponder-list> ::= <carrier-id>
<transponder-list>: A list of transponders.
<carrier-id>: An identifier for each one of the
transponders in the list.
<state> ::= <flexi-grid-transponder-attributes-state>
<flexi-grid-sliceable-transponder-attributes-state>
<flexi-grid-transponder-attributes-config>
<flexi-grid-sliceable-transponder-attributes-config>
<state>: Contains the state of a sliceable transponder.
<flexi-grid-transponder-attributes-state>: See above.
<flexi-grid-sliceable-transponder-attributes-state>:
Contains the state attributes of a sliceable transponders.
<flexi-grid-transponder-attributes-config>: See above.
<flexi-grid-sliceable-transponder-attributes-config>: See
above.
<link> ::= <config> <state>
<link>: This element describes all the information of a link.
<config> ::= <flexi-grid-link-attributes-config>
<config>: Contains the configuration of a link.
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<flexi-grid-link-attributes-config> ::= <technology-type>
<available-label-flexi-grid> <N-max> <base-frequency>
<nominal-central-frequency-granularity>
<slot-width-granularity>
<flexi-grid-link-attributes>: Contains all the
attributes related to the link, such as its unique id,
its N value, its latency, etc.
<link-id>: Unique id of the link.
<available-label-flexi-grid>: Array of bits that
determines, with each bit, the availability of each
interface for flexi-grid technology.
<N-max>: The max value of N in this link, being N
the number of slots.
<base-frequency>: The default central frequency
used in the link.
<nominal-central-frequency-granularity>: It is the
spacing between allowed nominal central frequencies
and it is set to 6.25 GHz (note: sometimes referred
to as 0.00625 THz).
<slot-width-granularity>: 12.5 GHz, as defined
in G.694.1.
<state> ::= <flexi-grid-link-attributes-config>
<flexi-grid-link-attributes-state>
<state>: Contains the state of a link.
<flexi-grid-link-attributes-config>: See above.
<flexi-grid-link-attributes-state>: Contains all the
the information related to the state of a link.
4.2. Media-channel/network-media-channel
The model defines two types of media channels, following the
terminology summarized in [RFC7698]:
o media-channel, which represents a (effective) frequency slot
supported by a concatenation of media elements (fibers, amplifiers,
filters, switching matrices...);
o network-media-channel: It is a media channel that transports an
Optical Tributary Signal. In the model, the network media channel
has as end-points transponders, which are the source and
destination of the optical signal.
The description of these components is provided below:
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<media-channel> ::= <source> <destination> <link-channel> <effective-
freq-slot>
<media-channel>: Determines a media-channel and its components.
<source > ::= <source-node> <source-port>
<source>: In a media-channel, the source is a node and a port.
<source-node>: Reference to the source node of the media
channel.
<source-port>: Reference to the source port in the source
<node.
<destination> ::= <destination-node> <destination-port>
<destination>: In a media-channel, the destination is a node
and a port.
<destination-node>: Reference to the destination node of the
media channel.
<destination-port>: Reference to the destination port in the
destination node.
<link-channel> ::= <link-id> <N> <M> <source-node> <source-port>
<destination-node> <destination-port> <link> <bidirectional>
<link-channel>: Defines a list with each of the links between
elements in the media channel.
<link-id>: Unique identifier for the link channel
<N>: N used for this link channel.
<M>: M used for this link channel.
<source-node>: Reference to the source node of this link
channel.
<source-port>: Reference to the source port of this link
channel.
<destination-node>: Reference to the destination node of this
link channel.
<destination-port>: Reference to the destination port of this
link channel.
<link>: Reference to the link of this link channel.
<bidirectional>: Indicates if this link is bidirectional or
not.
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<effective-freq-slot> ::= <N> <M>
<effective-freq-slot>: Defines the effective frequency slot of
the media channel, which could be different from the one
defined in the link channels.
<N>: Defines the effective N for this media channel.
<M>: Defines the effective M for this media channel.
<network-media-channel> ::= <source> <destination> <link-channel>
<effective-freq-slot>
<network-media-channel>: Determines a network media-channel and
its components.
<source > ::= <source-node> <source-transponder>
<source>: In a network media channel, the source is defined by
a node and a transponder.
<source-node>: Reference to the source node of the media
channel.
<source-transponder>: Reference to the source transponder in
the source node.
<destination> ::= <destination-node> <destination-transponder>
<destination>: In a network media channel, the destination is
defined by a node and a transponder
<destination-node>: Reference to the destination node of the
media channel.
<destination-port>: Reference to the destination port in the
destination node.
<link-channel>: See above, the information is reused for both types
of media channels.
<effective-freq-slot>: See above, this information is reused for
both types of media channels.
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5. Example of use
In order to explain how this model is used, we provide the following
example. An optical network usually has multiple transponders,
switches (nodes) and links between them. Figure 1 shows a simple
topology, where two physical paths interconnect two optical
transponders.
Media channel
<==================================================>
Path x
<-------------------------------------------------->
+----------+ +----------+
Link 1 |Flexi-grid| Link 2 |Flexi-grid| Link 3
.--->| node |<-------->| node |<---.
| | B | | C | |
| +----------+ +----------+ |
v v
+-------------+ +-------------+
| Flexi-grid | | Flexi-grid |
| transponder | | transponder |
| A | | E |
+-------------+ +-------------+
^ ^
| +----------+ |
| Link 4 |Flexi-grid| Link 5 |
'------------>| node |<-----------'
| D |
+----------+
<-------------------------------------------------->
Path y
Figure 1. Topology example.
In order to configure a media channel to interconnect transponders A
and E, first of all we have to populate the flexi-grid TED YANG model
with all elements in the network:
1. We define the transponders A and E, including their FEC type, if
enabled, and modulation type. We also provide node identifiers
and addresses for the transponders, as well as interfaces
included in the transponders. Sliceable transponders can also be
defined if needed.
2. We do the same for the nodes B, C and D, providing their
identifiers, addresses and interfaces, as well as the internal
connectivity matrix between interfaces.
3. Then, we also define the links 1 to 5 that interconnect nodes and
transponders, indicating which flexi-grid labels are available.
Other information, such as the slot frequency and granularity are
also provided.
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Next, we can configure the media channel from the information we
have stored in the flexi-grid TED, by querying which elements are
available, and planning the resources that have to be provided on
each situation. Note that every element in the flexi-grid TED has a
reference, and this is the way in which they are called in the media
channel.
4. Depending on the case, it is possible to define either the source
and destination node ports, or the source and destination node
and transponder. In our case, we would define a network media
channel, with source transponder A and source node B, and
destination transponder E and destination node C. Thus, we are
going to follow path x.
5. Then, for each link in the path x, we indicate which channel we
are going to use, providing information about the slots, and what
nodes are connected.
Finally, the flexi-grid TED has to be updated with each element
usage status each time a media channel is created or torn down.
6. Formal Syntax
The following syntax specification uses the augmented Backus-Naur
Form (BNF) as described in [RFC5234].
7. Security Considerations
The transport protocol used for sending the managed information MUST
support authentication and SHOULD support encryption.
The defined data-model by itself does not create any security
implications.
8. IANA Considerations
The namespace used in the defined models is currently based on the
IDEALIST project URI. Future versions of this document could
register a URI in the IETF XML registry [RFC3688], as well as in the
YANG Module Names registry [RFC6020].
9. References
9.1. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC5234] Crocker, D. and P. Overell, "Augmented BNF for Syntax
Specifications: ABNF", STD 68, RFC 5234, January 2008,
<http:/www.rfc-editor.org/info/rfc5234>.
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[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
October 2010.
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
January 2004.
9.2. Informative References
[RFC7698] Gonzalez de Dios, O., Casellas, R., Eds. "Framework and
Requirements for GMPLS-Based Control of Flexi-Grid Dense
Wavelength Division Multiplexing (DWDM) Networks",
RFC7698, November 2015.
[I-D.draft-ietf-i2rs-yang-network-topo] Clemm, A., Medved, J.,
Varga, R., Bahadur, N., Ananthakrishnan, H., Liu, X.,
"A Data Model for Network Topologies", Internet Draft
draft-ietf-i2rs-yang-network-topo-12.txt, 2017.
[I-D.draft-ietf-teas-yang-te-topo] Liu, X., Bryskin, I., Pavan
Beeram, V., Saad, T., Shah, H., Gonzalez De Dios, O., "YANG
Data Model for TE Topologies", Internet Draft
draft-ietf-teas-yang-te-topo-06.txt, 2016
[I-D.draft-dharini-ccamp-dwdm-if-yang] Galimberti, G., Kunze, R.,
Lam, K., Hiremagalur, D., Grammel, G., Fang, L., Ratterree, G.,
Eds., "A YANG model to manage the optical interface parameters
for an external transponder in a WDM network", Internet Draft,
draft-dharini-ccamp-dwdm-if-param-yang-00.txt, 2016.
[I-D.draft-ietf-ccamp-wson-yang] Lee, Y. Dhody, D., Zhang, X., Guo,
A., Lopez, V., King, D., Yoon, B.,"A Yang Data Model for WSON
Optical Networks", Internet Draft,
draft-ietf-ccamp-wson-yang-05.txt, 2017.
10. Contributors
The model presented in this paper was contributed to by more people
than can be listed on the author list. Additional contributors
include:
o Zafar Ali, Cisco Systems
o Daniel Michaud Vallinoto, Universidad Autonoma de Madrid
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11. Acknowledgments
The work presented in this Internet-Draft has been partially funded
by the European Commission under the project Industry-Driven Elastic
and Adaptive Lambda Infrastructure for Service and Transport
Networks (IDEALIST) of the Seventh Framework Program, with Grant
Agreement Number: 317999, and by the Spanish Ministry of Economy and
Competitiveness under the project TRAFICA (MINECO/FEDER
TEC2015-69417-C2-1-R).
Appendix A. YANG models
A.1. Flexi-grid TED YANG Model
A.1.1. Yang Model - Tree Structure
module: ietf-flexi-grid-topology
flexi-grid-network-type
augment /nd:networks/nd:network/nd:network-types:
+--rw flexi-grid-network!
flexi-grid-link-attributes-config
augment /nd:networks/nd:network/lnk:link/tet:te/tet:config:
+--rw available-label-flexi-grid* bits
+--rw N-max? int32
+--rw base-frequency? decimal64
+--rw nominal-central-frequency-granularity? decimal64
+--rw slot-width-granularity? decimal64
flexi-grid-link-attributes-state
augment /nd:networks/nd:network/lnk:link/tet:te/tet:state:
+--ro available-label-flexi-grid* bits
+--ro N-max? int32
+--ro base-frequency? decimal64
+--ro nominal-central-frequency-granularity? decimal64
+--ro slot-width-granularity? decimal64
flexi-grid-node-attributes-config
augment /nd:networks/nd:network/nd:node/tet:te/tet:config:
+--rw interfaces* [name]
+--rw name string
+--rw port-number? uint32
+--rw input-port? boolean
+--rw output-port? boolean
+--rw description? string
+--rw type? interface-type
+--rw numbered-interface
| +--rw n-i-ip-address? inet:ip-address
+--rw unnumbered-interface
+--rw u-i-ip-address? inet:ip-address
+--rw label? uint32
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flexi-grid-node-attributes-state
augment /nd:networks/nd:network/nd:node/tet:te/tet:state:
+--ro interfaces* [name]
+--ro name string
+--ro port-number? uint32
+--ro input-port? boolean
+--ro output-port? boolean
+--ro description? string
+--ro type? interface-type
+--ro numbered-interface
| +--ro n-i-ip-address? inet:ip-address
+--ro unnumbered-interface
+--ro u-i-ip-address? inet:ip-address
+--ro label? uint32
flexi-grid-connectivity-matrix-attributes
augment /nd:networks/nd:network/nd:node/tet:te/tet:config/
tet:te-node-attributes/tet:connectivity-matrix:
+--rw connections* [input-port-id]
+--rw input-port-id flexi-grid-node-port-ref
+--rw output-port-id? flexi-grid-node-port-ref
flexi-grid-connectivity-matrix-attributes
augment /nd:networks/nd:network/nd:node/tet:te/tet:state/
tet:te-node-attributes/tet:connectivity-matrix:
+--ro connections* [input-port-id]
+--ro input-port-id flexi-grid-node-port-ref
+--ro output-port-id? flexi-grid-node-port-ref
flexi-grid-transponder
augment /nd:networks/nd:network/nd:node/tet:te/
tet:tunnel-termination-point:
+--rw transponder-type flexi-grid-transponder-type
+--rw config
| +--rw available-modulation* modulation
| +--rw modulation-type? modulation
| +--rw available-FEC* FEC
| +--rw FEC-enabled? boolean
| +--rw FEC-type? FEC
+--ro state
+--ro available-modulation* modulation
+--ro modulation-type? modulation
+--ro available-FEC* FEC
+--ro FEC-enabled? boolean
+--ro FEC-type? FEC
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flexi-grid-sliceable-transponder
augment /nd:networks/nd:network/nd:node/tet:te/
tet:tunnel-termination-point:
+--rw transponder-type flexi-grid-transponder-type
+--rw config
| +--rw available-modulation* modulation
| +--rw modulation-type? modulation
| +--rw available-FEC* FEC
| +--rw FEC-enabled? boolean
| +--rw FEC-type? FEC
| +--rw transponder-list* [carrier-id]
| +--rw carrier-id uint32
+--ro state
+--ro available-modulation* modulation
+--ro modulation-type? modulation
+--ro available-FEC* FEC
+--ro FEC-enabled? boolean
+--ro FEC-type? FEC
+--ro transponder-list* [carrier-id]
+--ro carrier-id uint32
A.1.2. YANG Model - Code
<CODE BEGINS> file "ietf-flexi-grid-ted.yang"
module ietf-flexi-grid-ted {
yang-version 1.1;
namespace "urn:ietf:params:xml:ns:yang:ietf-flexi-grid-ted";
prefix "fg-ted";
import ietf-network {
prefix "nd";
}
import ietf-network-topology {
prefix "lnk";
}
import ietf-te-topology {
prefix "tet";
}
import ietf-inet-types {
prefix "inet";
}
organization
"IETF CCAMP Working Group";
contact
"Editor: Jorge E. Lopez de Vergara
<jorge.lopez_vergara@uam.es>";
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description
"This module contains a collection of YANG definitions for
a Flexi-Grid Traffic Engineering Database (TED).
Copyright (c) 2017 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD
License set forth in Section 4.c of the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info).";
revision 2017-03-01 {
description
"version 4.";
reference
"RFC XXX: A Yang Data Model for
Flexi-Grid Optical Networks ";
}
typedef flexi-grid-trasponder-type {
type enumeration {
enum "flexi-grid-transponder" {
description
"Flexi-grid transponder";
}
enum "flexi-grid-sliceable-transponder" {
description
"Flexi-grid sliceable transponder";
}
}
description "Determines the trasponder type:
flexi-grid-transponder or
flexi-grid-sliceable-transponder";
}
typedef modulation {
type enumeration {
enum QPSK {
description
"QPSK (Quadrature Phase Shift Keying) modulation";
}
enum DP_QPSK {
description "DP-QPSK (Dual Polarization Quadrature
Phase Shift Keying) modulation";
}
enum QAM16 {
description "QAM16 (Quadrature Amplitude Modulation
- 4 bits per symbol) modulation";
}
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enum DP_QAM16 {
description "DP-QAM16 (Dual Polarization
Quadrature Amplitude Modulation - 4 bits per
symbol) modulation";
}
enum DC_DP_QAM16 {
description "DC DP-QAM16 (Dual Polarization
Quadrature Amplitude Modulation - 4 bits per
symbol) modulation";
}
}
description
"Enumeration that defines the type of wave modulation";
}
typedef FEC {
type enumeration {
enum reed-solomon {
description "Reed-Solomon error correction";
}
enum hamming-code{
description "Hamming Code error correction";
}
enum golay{
description "Golay error correction";
}
}
description "Enumeration that defines the type of
Forward Error Correction";
}
typedef interface-type {
type enumeration {
enum numbered-interface {
description "The interface is numbered";
}
enum unnumbered-interface {
description "The interface is unnumbered";
}
}
description
"Enumeration that defines if an interface is numbered or
unnumbered";
}
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/*
Typedef related to references
*/
typedef flexi-grid-link-ref {
type leafref {
path
"/nd:networks/nd:network/lnk:link/lnk:link-id";
}
description
"This type is used by data models that need to reference
a flexi-grid optical link.";
}
typedef flexi-grid-node-port-ref {
type leafref {
path "/nd:networks/nd:network/nd:node/tet:te/tet:config/"
+"fg-ted:interfaces/fg-ted:port-number";
}
description
"This type is used by data models that need to reference
a flexi-grid port.";
}
typedef flexi-grid-transponder-ref {
type leafref {
path "/nd:networks/nd:network/nd:node/tet:te/"+
"tet:tunnel-termination-point/tet:tunnel-tp-id";
}
description
"This type is used by data models that need to reference
a trasponder.";
}
grouping flexi-grid-network-type {
container flexi-grid-network {
presence "indicates a flexi-grid optical network";
description "flexi-grid optical network";
}
description "If present, it indicates a flexi-grid
optical TED network";
}
grouping flexi-grid-node-attributes-config {
description "Set of attributes of an optical node.";
list interfaces {
key "name";
unique "port-number";
description "List of interfaces contained in the node";
leaf name {
type string;
description "Interface name";
}
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leaf port-number {
type uint32;
description "Number of the port used by the interface";
}
leaf input-port {
type boolean;
description "Determines if the port is an input port";
}
leaf output-port {
type boolean;
description
"Determines if the port is an output port";
}
leaf description {
type string;
description "Description of the interface";
}
leaf type {
type interface-type;
description "Determines the type of the interface";
}
container numbered-interface {
when "../fg-ted:type =
'numbered-interface'" {
description
"If the interface is a numbered interface";
}
description "Container that defines an numbered
interface with an ip-address";
leaf n-i-ip-address{
type inet:ip-address;
description "IP address of the numbered interface";
}
}
container unnumbered-interface {
when "../fg-ted:type =
'unnumbered-interface'" {
description
"If the interface is an unnumbered interface";
}
description "Container that defines an unnumbered
interface with an ip-address and a label";
leaf u-i-ip-address{
type inet:ip-address;
description "IP address of the interface";
}
leaf label {
type uint32;
description "Number as label for the interface";
}
}
}
}
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grouping flexi-grid-node-attributes-state {
description "Flexigrid node attributes (state).";
}
grouping flexi-grid-link-attributes-config {
description "Set of attributes of an optical link";
leaf-list available-label-flexi-grid {
type bits {
bit is-available{
description "Set to 1 when it is available";
}
}
description
"Array of bits that determines whether a spectral
slot is available or not.";
}
leaf N-max {
type int32;
description "Maximum number of channels available.";
}
leaf base-frequency {
type decimal64 {
fraction-digits 5;
}
units THz;
default 193.1;
description "Default central frequency";
reference "rfc7698";
}
leaf nominal-central-frequency-granularity {
type decimal64 {
fraction-digits 5;
}
units GHz;
default 6.25;
description
"It is the spacing between allowed nominal central
frequencies and it is set to 6.25 GHz";
reference "rfc7698";
}
leaf slot-width-granularity {
type decimal64 {
fraction-digits 5;
}
units GHz;
description "Minimum space between slot widths";
reference "rfc7698";
}
}
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grouping flexi-grid-link-attributes-state {
description "Flexigrid link attributes (state)";
}
grouping flexi-grid-transponder-attributes-config {
description "Configuration of an optical transponder";
leaf-list available-modulation {
type modulation;
description
"List determining all the available modulations";
}
leaf modulation-type {
type modulation;
description "Modulation type of the wave";
}
leaf-list available-FEC {
type FEC;
description "List determining all the available FEC";
}
leaf FEC-enabled {
type boolean;
description
"Determines whether the FEC is enabled or not";
}
leaf FEC-type {
type FEC;
description "FEC type of the transponder";
}
}
grouping flexi-grid-transponder-attributes-state {
description "State of an optical transponder";
}
grouping flexi-grid-sliceable-transponder-attributes-config {
description
"Configuration of a sliceable transponder.";
list transponder-list {
key "carrier-id";
description "List of carriers";
leaf carrier-id {
type uint32;
description "Identifier of the carrier";
}
}
}
grouping flexi-grid-sliceable-transponder-attributes-state {
description "State of a sliceable transponder.";
uses flexi-grid-transponder-attributes-state;
}
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grouping flexi-grid-connectivity-matrix-attributes {
description "Connectivity matrix between the input and
output ports";
list connections {
key "input-port-id";
leaf input-port-id {
type flexi-grid-node-port-ref;
description "Identifier of the input port";
}
leaf output-port-id {
type flexi-grid-node-port-ref;
description "Identifier of the output port";
}
description "List of connections between input and
output ports";
}
}
augment "/nd:networks/nd:network/nd:network-types" {
uses flexi-grid-network-type;
description "Augment network-types including flexi-grid
topology";
}
augment "/nd:networks/nd:network/lnk:link/tet:te/tet:config" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network" {
description "Augment only for Flexigrid network.";
}
description "Augment link configuration";
uses flexi-grid-link-attributes-config;
}
augment "/nd:networks/nd:network/lnk:link/tet:te/tet:state" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network" {
description "Augment only for Flexigrid network.";
}
description "Augment link state";
uses flexi-grid-link-attributes-config;
uses flexi-grid-link-attributes-state;
}
augment "/nd:networks/nd:network/nd:node/tet:te/tet:config" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network" {
description "Augment only for Flexigrid network.";
}
uses flexi-grid-node-attributes-config;
description "Augment node config with flexi-grid attributes";
}
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augment "/nd:networks/nd:network/nd:node/tet:te/tet:state" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network" {
description "Augment only for Flexigrid network.";
}
uses flexi-grid-node-attributes-config;
uses flexi-grid-node-attributes-state;
description "Augment node config with flexi-grid attributes";
}
augment "/nd:networks/nd:network/nd:node/tet:te/tet:config"+
"/tet:te-node-attributes/tet:connectivity-matrix" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network" {
description "Augment only for Flexigrid network.";
}
uses flexi-grid-connectivity-matrix-attributes;
description "Augment node connectivity-matrix for node config";
}
augment "/nd:networks/nd:network/nd:node/tet:te/tet:state"+
"/tet:te-node-attributes/tet:connectivity-matrix" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network"{
description "Augment only for Flexigrid network.";
}
uses flexi-grid-connectivity-matrix-attributes;
description "Augment node connectivity-matrix for node config";
}
augment "/nd:networks/nd:network/nd:node/tet:te"+
"/tet:tunnel-termination-point" {
when "/nd:networks/nd:network/nd:network-types/
fg-ted:flexi-grid-network"{
description "Augment only for Flexigrid network.";
}
leaf transponder-type {
type flexi-grid-trasponder-type;
description "Type of flexi-grid transponder";
}
container state {
description "State of the transponder";
}
container config {
description "Configuration of the transponder";
}
description "Augment node with configuration and state
for transponder";
}
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augment "/nd:networks/nd:network/nd:node/tet:te"+
"/tet:tunnel-termination-point/fg-ted:config" {
when "../fg-ted:transponder-type" {
description "When it is either a flexi-grid transponder
or a sliceable transponder";
}
uses flexi-grid-transponder-attributes-config;
description "Augment node state with transponder attributes";
}
augment "/nd:networks/nd:network/nd:node/tet:te"+
"/tet:tunnel-termination-point/fg-ted:state" {
when "../fg-ted:transponder-type"{
description "When it is either a flexi-grid transponder
or a sliceable transponder";
}
uses flexi-grid-transponder-attributes-state;
uses flexi-grid-transponder-attributes-config;
description "Augment node state with transponder attributes";
}
augment "/nd:networks/nd:network/nd:node/tet:te"+
"/tet:tunnel-termination-point/fg-ted:config" {
when "../fg-ted:transponder-type =
'flexi-grid-sliceable-transponder'"{
description
"When it is a flexi-grid sliceable transponder";
}
uses flexi-grid-sliceable-transponder-attributes-config;
description "Augment node with sliceable transponder
attributes";
}
augment "/nd:networks/nd:network/nd:node/tet:te"+
"/tet:tunnel-termination-point/fg-ted:state" {
when "../fg-ted:transponder-type =
'flexi-grid-sliceable-transponder'"{
description
"When it is a flexi-grid sliceable transponder";
}
uses flexi-grid-sliceable-transponder-attributes-state;
uses flexi-grid-sliceable-transponder-attributes-config;
description "Augment node with sliceable transponder
attributes";
}
}
<CODE ENDS>
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A.2. Media Channel YANG Model
A.2.1. YANG Model - Tree
module: ietf-flexi-grid-media-channel
+--rw media-channel
| +--rw source
| | +--rw source-node? te-types:te-node-id
| | +--rw source-port? fg-ted:flexi-grid-node-port-ref
| +--rw destination
| | +--rw destination-node? te-types:te-node-id
| | +--rw destination-port? fg-ted:flexi-grid-node-port-ref
| +--rw effective-freq-slot
| | +--rw N? int32
| | +--rw M? int32
| +--rw link-channel* [link-id]
| +--rw link-id int32
| +--rw N? int32
| +--rw M? int32
| +--rw source-node? te-types:te-node-id
| +--rw source-port? fg-ted:flexi-grid-node-port-ref
| +--rw destination-node? te-types:te-node-id
| +--rw destination-port? fg-ted:flexi-grid-node-port-ref
| +--rw link? fg-ted:flexi-grid-link-ref
| +--rw bidireccional? boolean
+--rw network-media-channel
+--rw source
| +--rw source-node? te-types:te-node-id
| +--rw source-transponder? fg-ted:flexi-grid-transponder-ref
+--rw destination
| +--rw destination-node? te-types:te-node-id
| +--rw destination-transponder?
| fg-ted:flexi-grid-transponder-ref
+--rw effective-freq-slot
| +--rw N? int32
| +--rw M? int32
+--rw link-channel* [link-id]
+--rw link-id int32
+--rw N? int32
+--rw M? int32
+--rw source-node? te-types:te-node-id
+--rw source-port? fg-ted:flexi-grid-node-port-ref
+--rw destination-node? te-types:te-node-id
+--rw destination-port? fg-ted:flexi-grid-node-port-ref
+--rw link? fg-ted:flexi-grid-link-ref
+--rw bidireccional? boolean
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A.2.2. YANG Model - Code
<CODE BEGINS> file "ietf-flexi-grid-media-channel.yang"
module ietf-flexi-grid-media-channel {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-flexi-grid-media-channel";
prefix "fg-mc";
import ietf-flexi-grid-ted {
prefix "fg-ted";
}
import ietf-te-types {
prefix "te-types";
}
organization
"IETF CCAMP Working Group";
contact
"Editor: Jorge E. Lopez de Vergara
<jorge.lopez_vergara@uam.es>";
description
"This module contains a collection of YANG definitions for
a Flexi-Grid media channel.
Copyright (c) 2017 IETF Trust and the persons identified as
authors of the code. All rights reserved.
Redistribution and use in source and binary forms, with or
without modification, is permitted pursuant to, and subject
to the license terms contained in, the Simplified BSD
License set forth in Section 4.c of the IETF Trust's Legal
Provisions Relating to IETF Documents
(http://trustee.ietf.org/license-info).";
revision 2017-03-01 {
description
"version 4.";
reference
"RFC XXX: A Yang Data Model for Flexi-Grid Optical
Networks ";
}
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container media-channel {
description
"Media association that represents both the topology
(i.e., path through the media) and the resource
(frequency slot) that it occupies. As a topological
construct, it represents a (effective) frequency slot
supported by a concatenation of media elements (fibers,
amplifiers, filters, switching matrices...). This term
is used to identify the end-to-end physical layer entity
with its corresponding (one or more) frequency slots
local at each link filters.";
reference "rfc7698";
container source {
description "Source of the media channel";
leaf source-node {
type te-types:te-node-id;
description "Source node";
}
leaf source-port {
type fg-ted:flexi-grid-node-port-ref;
description "Source port";
}
}
container destination {
description "Destination of the media channel";
leaf destination-node {
type te-types:te-node-id;
description "Destination node";
}
leaf destination-port {
type fg-ted:flexi-grid-node-port-ref;
description "Destination port";
}
}
uses media-channel-attributes;
}
container network-media-channel {
description
"It is a media channel that transports an Optical
Tributary Signal ";
reference "rfc7698";
container source {
description "Source of the network media channel";
leaf source-node {
type te-types:te-node-id;
description "Source node";
}
leaf source-transponder {
type fg-ted:flexi-grid-transponder-ref;
description "Source transponder";
}
}
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container destination {
description "Destination of the network media channel";
leaf destination-node {
type te-types:te-node-id;
description "Destination node";
}
leaf destination-transponder {
type fg-ted:flexi-grid-transponder-ref;
description "Destination transponder";
}
}
uses media-channel-attributes;
}
grouping media-channel-attributes {
description "Set of attributes of a media channel";
container effective-freq-slot {
description "The effective frequency slot is an attribute
of a media channel and, being a frequency slot, it is
described by its nominal central frequency and slot
width";
reference "rfc7698";
leaf N {
type int32;
description
"Is used to determine the Nominal Central
Frequency. The set of nominal central frequencies
can be built using the following expression:
f = 193.1 THz + n x 0.00625 THz,
where 193.1 THz is ITU-T ''anchor frequency'' for
transmission over the C band, n is a positive or
negative integer including 0.";
reference "rfc7698";
}
leaf M {
type int32;
description
"Is used to determine the slot width. A slot width
is constrained to be M x SWG (that is, M x 12.5 GHz),
where M is an integer greater than or equal to 1.";
reference "rfc7698";
}
}
list link-channel {
key "link-id";
description
"A list of the concatenated elements of the media
channel.";
leaf link-id {
type int32;
description "Identifier of the link";
}
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uses link-channel-attributes;
}
}
grouping link-channel-attributes {
description
"A link channel is one of the concatenated elements of
the media channel.";
leaf N {
type int32;
description
"Is used to determine the Nominal Central Frequency.
The set of nominal central frequencies can be built
using the following expression:
f = 193.1 THz + n x 0.00625 THz,
where 193.1 THz is ITU-T ''anchor frequency'' for
transmission over the C band, n is a positive or
negative integer including 0.";
reference "rfc7698";
}
leaf M {
type int32;
description
"Is used to determine the slot width. A slot
width is constrained to be M x SWG (that is,
M x 12.5 GHz), where M is an integer greater than
or equal to 1.";
reference "rfc7698";
}
leaf source-node {
type te-types:te-node-id;
description "Source node of the link channel";
}
leaf source-port {
type fg-ted:flexi-grid-node-port-ref;
description "Source port of the link channel";
}
leaf destination-node {
type te-types:te-node-id;
description "Destination node of the link channel";
}
leaf destination-port {
type fg-ted:flexi-grid-node-port-ref;
description "Destination port of the link channel";
}
leaf link {
type fg-ted:flexi-grid-link-ref;
description "Link of the link channel";
}
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leaf bidireccional {
type boolean;
description
"Determines whether the link is bidireccional or
not";
}
}
}
<CODE ENDS>
A.3. License
Copyright (c) 2017 IETF Trust and the persons identified as authors
of the code. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
o Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
o Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
o Neither the name of Internet Society, IETF or IETF Trust, nor the
names of specific contributors, may be used to endorse or promote
products derived from this software without specific prior
written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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Lopez de Vergara, et al. Expires September 7, 2017 [Page 31]
Internet-Draft A YANG data model for Flexi-Grid March 2017
Authors' Addresses
Jorge E. Lopez de Vergara
Universidad Autonoma de Madrid
Escuela Politecnica Superior
C/Francisco Tomas y Valiente, 11
E-28049 Madrid, Spain
Email: jorge.lopez_vergara@uam.es
Daniel Perdices Burrero
Universidad Autonoma de Madrid
Escuela Politecnica Superior
C/Francisco Tomas y Valiente, 11
E-28049 Madrid, Spain
Email: daniel.perdices@estudiante.uam.es
Victor Lopez
Telefonica I+D/GCTO
Distrito Telefonica
E-28050 Madrid, Spain
Email: victor.lopezalvarez@telefonica.com
Oscar Gonzalez de Dios
Telefonica I+D/GCTO
Distrito Telefonica
E-28050 Madrid, Spain
Email: oscar.gonzalezdedios@telefonica.com
Daniel King
Lancaster University
Email: d.king@lancaster.ac.uk
Young Lee
Huawei Technologies
Email: leeyoung@huawei.com
Gabriele Galimberti
Cisco Photonics Srl
Email: ggalimbe@cisco.com
Lopez de Vergara, et al. Expires September 7, 2017 [Page 32]