TEAS Working Group Y. Lee, Ed.
Internet-Draft Samsung Electronics
Intended status: Standards Track D. Dhody, Ed.
Expires: September 9, 2020 G. Fioccola
Q. Wu, Ed.
Huawei Technologies
D. Ceccarelli
Ericsson
J. Tantsura
Apstra
March 8, 2020
Traffic Engineering (TE) and Service Mapping Yang Model
draft-ietf-teas-te-service-mapping-yang-03
Abstract
This document provides a YANG data model to map customer service
models (e.g., the L3VPN Service Model (L3SM)) to Traffic Engineering
(TE) models (e.g., the TE Tunnel or the Virtual Network (VN) model).
This model is referred to as TE Service Mapping Model and is
applicable generically to the operator's need for seamless control
and management of their VPN services with TE tunnel support.
The model is principally used to allow monitoring and diagnostics of
the management systems to show how the service requests are mapped
onto underlying network resource and TE models.
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
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Drafts is at https://datatracker.ietf.org/drafts/current/.
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and may be updated, replaced, or obsoleted by other documents at any
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on September 9, 2020.
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Copyright Notice
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document authors. All rights reserved.
This document is subject to BCP 78 and the IETF Trust's Legal
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 4
1.2. Tree diagram . . . . . . . . . . . . . . . . . . . . . . 5
1.3. Prefixes in Data Node Names . . . . . . . . . . . . . . . 5
2. TE and Service Related Parameters . . . . . . . . . . . . . . 6
2.1. VN/Tunnel Selection Requirements . . . . . . . . . . . . 6
2.2. Availability Requirement . . . . . . . . . . . . . . . . 7
3. YANG Modeling Approach . . . . . . . . . . . . . . . . . . . 7
3.1. Forward Compatibility . . . . . . . . . . . . . . . . . . 8
3.2. TE and Network Models . . . . . . . . . . . . . . . . . . 8
4. L3VPN Architecture in the ACTN Context . . . . . . . . . . . 9
4.1. Service Mapping . . . . . . . . . . . . . . . . . . . . . 12
4.2. Site Mapping . . . . . . . . . . . . . . . . . . . . . . 12
5. Applicability of TE-Service Mapping in Generic context . . . 13
6. YANG Data Trees . . . . . . . . . . . . . . . . . . . . . . . 13
6.1. Service Models . . . . . . . . . . . . . . . . . . . . . 13
6.1.1. L3SM . . . . . . . . . . . . . . . . . . . . . . . . 13
6.1.2. L2SM . . . . . . . . . . . . . . . . . . . . . . . . 14
6.1.3. L1CSM . . . . . . . . . . . . . . . . . . . . . . . . 15
6.2. Network Models . . . . . . . . . . . . . . . . . . . . . 16
6.2.1. L3NM . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2.2. L2NM . . . . . . . . . . . . . . . . . . . . . . . . 17
7. YANG Data Models . . . . . . . . . . . . . . . . . . . . . . 18
7.1. ietf-te-service-mapping-types . . . . . . . . . . . . . . 18
7.2. Service Models . . . . . . . . . . . . . . . . . . . . . 24
7.2.1. ietf-l3sm-te-service-mapping . . . . . . . . . . . . 24
7.2.2. ietf-l2sm-te-service-mapping . . . . . . . . . . . . 26
7.2.3. ietf-l1csm-te-service-mapping . . . . . . . . . . . . 28
7.3. Network Models . . . . . . . . . . . . . . . . . . . . . 30
7.3.1. ietf-l3nm-te-service-mapping . . . . . . . . . . . . 30
7.3.2. ietf-l2nm-te-service-mapping . . . . . . . . . . . . 32
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8. Security Considerations . . . . . . . . . . . . . . . . . . . 34
9. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 36
10. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 37
11. References . . . . . . . . . . . . . . . . . . . . . . . . . 37
11.1. Normative References . . . . . . . . . . . . . . . . . . 37
11.2. Informative References . . . . . . . . . . . . . . . . . 39
Appendix A. Contributor Addresses . . . . . . . . . . . . . . . 40
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 40
1. Introduction
Data models are a representation of objects that can be configured or
monitored within a system. Within the IETF, YANG [RFC7950] is the
language of choice for documenting data models, and YANG models have
been produced to allow configuration or modelling of a variety of
network devices, protocol instances, and network services. YANG data
models have been classified in [RFC8199] and [RFC8309].
Framework for Abstraction and Control of Traffic Engineered Networks
(ACTN) [RFC8453] introduces an architecture to support virtual
network services and connectivity services.
[I-D.ietf-teas-actn-vn-yang] defines a YANG model and describes how
customers or end-to-end orchestrator can request and/or instantiate a
generic virtual network service. [I-D.ietf-teas-actn-yang] describes
the way IETF YANG models of different classifications can be applied
to the ACTN interfaces. In particular, it describes how customer
service models can be mapped into the CNC-MDSC Interface (CMI) of the
ACTN architecture.
The models presented in this document are also applicable in generic
context [RFC8309] as part of Customer Service Model used between
Service Orchestrator and Customer.
[RFC8299] provides a L3VPN service delivery YANG model for PE-based
VPNs. The scope of that draft is limited to a set of domains under
control of the same network operator to deliver services requiring TE
tunnels.
[RFC8466] provides a L2VPN service delivery YANG model for PE-based
VPNs. The scope of that draft is limited to a set of domains under
control of the same network operator to deliver services requiring TE
tunnels.
[I-D.ietf-ccamp-l1csm-yang] provides a L1 connectivity service
delivery YANG model for PE-based VPNs. The scope of that draft is
limited to a set of domains under control of the same network
operator to deliver services requiring TE tunnels.
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While the IP/MPLS Provisioning Network Controller (PNC) is
responsible for provisioning the VPN service on the Provider Edge
(PE) nodes, the Multi-Domain Service Coordinator (MDSC) can
coordinate how to map the VPN services onto Traffic Engineering (TE)
tunnels. This is consistent with the two of the core functions of
the MDSC specified in [RFC8453]:
o Customer mapping/translation function: This function is to map
customer requests/commands into network provisioning requests that
can be sent to the PNC according to the business policies that
have been provisioned statically or dynamically. Specifically, it
provides mapping and translation of a customer's service request
into a set of parameters that are specific to a network type and
technology such that the network configuration process is made
possible.
o Virtual service coordination function: This function translates
customer service-related information into virtual network service
operations in order to seamlessly operate virtual networks while
meeting a customer's service requirements. In the context of
ACTN, service/virtual service coordination includes a number of
service orchestration functions such as multi-destination load
balancing, guarantees of service quality, bandwidth and
throughput. It also includes notifications for service fault and
performance degradation and so forth.
Section 2 describes a set of TE and service related parameters that
this document addresses as "new and advanced parameters" that are not
included in generic service models. Section 3 discusses YANG
modelling approach.
Apart from the service model, the TE mapping is equally applicable to
the Network Models (L3 VPN Service Network Model (L3NM)
[I-D.ietf-opsawg-l3sm-l3nm], L2 VPN Service Network Model (L2NM)
[I-D.barguil-opsawg-l2sm-l2nm] etc.). See Section 3.2 for details.
1.1. Terminology
Refer to [RFC8453], [RFC7926], and [RFC8309] for the key terms used
in this document.
The terminology for describing YANG data models is found in
[RFC7950].
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1.2. Tree diagram
A simplified graphical representation of the data model is used in
Section 5 of this this document. The meaning of the symbols in these
diagrams is defined in [RFC8340].
1.3. Prefixes in Data Node Names
In this document, names of data nodes and other data model objects
are prefixed using the standard prefix associated with the
corresponding YANG imported modules, as shown in Table 1.
+---------+----------------------------+----------------------------+
| Prefix | YANG module | Reference |
+---------+----------------------------+----------------------------+
| tsm- | ietf-te-service-mapping- | [RFCXXXX] |
| types | types | |
| l1csm | ietf-l1csm | [I-D.ietf-ccamp-l1csm-yang |
| | | ] |
| l2vpn- | ietf-l2vpn-svc | [RFC8466] |
| svc | | |
| l3vpn- | ietf-l3vpn-svc | [RFC8299] |
| svc | | |
| l1-tsm | ietf-l1csm-te-service- | [RFCXXXX] |
| | mapping | |
| l2-tsm | ietf-l2sm-te-service- | [RFCXXXX] |
| | mapping | |
| l3-tsm | ietf-l3sm-te-service- | [RFCXXXX] |
| | mapping | |
| vn | ietf-vn | [I-D.ietf-teas-actn-vn-yan |
| | | g] |
| nw | ietf-network | [RFC8345] |
| te- | ietf-te-types | [I-D.ietf-teas-yang-te-typ |
| types | | es] |
| te | ietf-te | [I-D.ietf-teas-yang-te] |
| l1csm | ietf-l1csm | [I-D.ietf-ccamp-l1csm-yang |
| | | ] |
| l2vpn- | ietf-l2vpn-ntw | [I-D.barguil-opsawg-l2sm-l |
| ntw | | 2nm] |
| l3vpn- | ietf-l3vpn-ntw | [I-D.ietf-opsawg-l3sm-l3nm |
| ntw | | ] |
+---------+----------------------------+----------------------------+
Table 1: Prefixes and corresponding YANG modules
Note: The RFC Editor should replace XXXX with the number assigned to
the RFC once this draft becomes an RFC.
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2. TE and Service Related Parameters
While L1/L2/L3 service models (L1CSM, L2SM, L3SM) are intended to
provide service-specific parameters for VPN service instances, there
are a number of TE Service related parameters that are not included
in these service models.
Additional 'service parameters and policies' that are not included in
the aforementioned service models are addressed in the YANG models
defined in this document.
2.1. VN/Tunnel Selection Requirements
In some cases, the service requirements may need addition TE tunnels
to be established. This may occur when there are no suitable
existing TE tunnels that can support the service requirements, or
when the operator would like to dynamically create and bind tunnels
to the VPN such that they are not shared by other VPNs, for example,
for network slicing. The establishment of TE tunnels is subject to
the network operator's policies.
To summarize, there are three modes of VN/Tunnel selection operations
to be supported as follows. Additional modes may be defined in the
future.
o New VN/Tunnel Binding - A customer could request a VPN service
based on VN/Tunnels that are not shared with other existing or
future services. This might be to meet VPN isolation
requirements. Further, the YANG model described in Section 5 of
this document can be used to describe the mapping between the VPN
service and the ACTN VN. The VN (and TE tunnels) could be bound
to the VPN and not used for any other VPN. Under this mode, the
following sub-categories can be supported:
1. Hard Isolation with deterministic characteristics: A customer
could request a VPN service using a set of TE Tunnels with
deterministic characteristics requirements (e.g., no latency
variation) and where that set of TE Tunnels must not be shared
with other VPN services and must not compete for bandwidth or
other network resources with other TE Tunnels.
2. Hard Isolation: This is similar to the above case but without
the deterministic characteristics requirements.
3. Soft Isolation: The customer requests a VPN service using a
set of TE tunnels which can be shared with other VPN services.
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o VN/Tunnel Sharing - A customer could request a VPN service where
new tunnels (or a VN) do not need to be created for each VPN and
can be shared across multiple VPNs. Further, the mapping YANG
model described in Section 5 of this document can be used to
describe the mapping between the VPN service and the tunnels in
use. No modification of the properties of a tunnel (or VN) is
allowed in this mode: an existing tunnel can only be selected.
o VN/Tunnel Modify - This mode allows the modification of the
properties of the existing VN/tunnel (e.g., bandwidth).
2.2. Availability Requirement
Availability is another service requirement or intent that may
influence the selection or provisioning of TE tunnels or a VN to
support the requested service. Availability is a probabilistic
measure of the length of time that a VPN/VN instance functions
without a network failure.
The availability level will need to be translated into network
specific policies such as the protection/reroute policy associated
with a VN or Tunnel. The means by which this is achieved is not in
the scope of this document.
3. YANG Modeling Approach
This section provides how the TE and Service mapping parameters are
supported using augmentation of the existing service models (i.e.,
[I-D.ietf-ccamp-l1csm-yang], [RFC8466], and [RFC8299]). Figure 1
shows the scope of the Augmented LxSM Model.
+--------------+ +----------------------+ +----------+
| LxSM |o-------| | . . . . | ACTN VN |
+--------------+ augment| | +----------+
| | +----------+
+--------------+ | Augmented LxSM Model | . . . . | TE-topo |
| TE & Service |------->| | +----------+
| Mapping Types| import | | +----------+
+--------------+ | | . . . . | TE-tunnel|
+----------------------+ +----------+
reference
Figure 1: Augmented LxSM Model
The Augmented LxSM model (where x=1,2,3) augments the basic LxSM
model while importing the common TE and Service related parameters
(defined in Section 2) grouping information from TE and Service
Mapping Types. The TE and Service Mapping Types (ietf-te-service-
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mapping-types) module is the repository of all common groupings
imported by each augmented LxSM model. Any future service models
would import this mapping-type common model.
The role of the augmented LxSm service model is to expose the mapping
relationship between service models and TE models so that VN/VPN
service instantiations provided by the underlying TE networks can be
viewed outside of the MDSC, for example by an operator who is
diagnosing the behaviour of the network. It also allows for the
customers to access operational state information about how their
services are instantiated with the underlying VN, TE topology or TE
tunnels provided that the MDSC operator is willing to share that
information. This mapping will facilitate a seamless service
management operation with underlay-TE network visibility.
As seen in Figure 1, the augmented LxSM service model records a
mapping between the customer service models and the ACTN VN YANG
model. Thus, when the MDSC receives a service request it creates a
VN that meets the customer's service objectives with various
constraints via TE-topology model [I-D.ietf-teas-yang-te-topo], and
this relationship is recorded by the Augmented LxSM Model. The model
also supports a mapping between a service model and TE-topology or a
TE-tunnel.
The YANG models defined in this document conforms to the Network
Management Datastore Architecture (NMDA) [RFC8342].
3.1. Forward Compatibility
The YANG module defined in this document supports three existing
service models via augmenting while sharing the common TE and Service
Mapping Types.
It is possible that new service models will be defined at some future
time and that it will be desirable to map them to underlying TE
constructs in the same way as the three existing models are
augmented.
3.2. TE and Network Models
The L2/L3 network models (L2NM, L3NM) are intended to describe a VPN
Service in the Service Provider Network. It containts information of
the Service Provider network and might include allocated resources.
It can be used by network controllers to manage and control the VPN
Service configuration in the Service Provider network.
Similar to service model, the existing network models (i.e.,
[I-D.ietf-opsawg-l3sm-l3nm], and [I-D.barguil-opsawg-l2sm-l2nm]) are
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augmented to include the TE and Service mapping parameters. Figure 2
shows the scope of the Augmented LxNM Model.
+--------------+ +----------------------+ +----------+
| LxNM |o-------| | . . . . | ACTN VN |
+--------------+ augment| | +----------+
| | +----------+
+--------------+ | Augmented LxNM Model | . . . . | TE-topo |
| TE & Service |------->| | +----------+
| Mapping Types| import | | +----------+
+--------------+ | | . . . . | TE-tunnel|
+----------------------+ +----------+
reference
Figure 2: Augmented LxNM Model
The Augmented LxNM model (where x=2,3) augments the basic LxNM model
while importing the common TE mapping related parameters (defined in
Section 2) grouping information from TE and Service Mapping Types.
The role of the augmented LxNM network model is to expose the mapping
relationship between network models and TE models.
4. L3VPN Architecture in the ACTN Context
Figure 3 shows the architectural context of this document referencing
the ACTN components and interfaces.
+----------------------------+
| Customer Service Manager |
| +-----------------------+ |
| | CNC + |
| +-+-------------------+-+ |
+----|-------------------|---+
| |
|CMI(Augmented L3SM)|CMI(VN)
| |
+----------------|-------------------|----+
| +--------------|-----------------+ | |
| | MDSC | | | |
| | | | | |
| | +-----------+--------------+ | | |
TE-Svc-Map<------+ Service Mapping Function | | | |
| | +-----------+--------------+ | | |
| | | | | |
| +-------+------|-----------------+ | |
| | | | |
| | |CMI(VN) | |
| | | | |
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| | +--|-------------------|--+ |
| | | | MDSC | | |
| | | ++-------------------++ | |
| | | + Service Mapping +---->TE-Svc-Map
| | | ++----------+---------+ | |
| | +--|----------|-----------+ |
+---------|------|----------|-------------+
| | |
| +----+--------+ |
| | | |
MPI(VPN / TE models)| | | |MPI(TE / L1 models)
| | | |
+-----|-|---+ +-----|-|----+
IP/MPLS | +--+-+-+ | | +--+-+-+ | Optical Domain
Domain | | PNC1 | | | | PNC2 | | Controller
Controller | +--+---+ | | +--+---+ |
+-----|-----+ +-----|------+
| |
V | SBI
+---------------------+ |
/ IP/MPLS Network \ |
+-------------------------+ |
V
+---------------------+
/ Optical Network \
+-------------------------+
Figure 3: L3VPN Architecture from the IP+Optical Network Perspective
There are three main entities in the ACTN architecture and shown in
Figure 3.
o CNC: The Customer Network Controller is responsible for generating
service requests. In the context of an L3VPN, the CNC uses the
Augmented L3SM to express the service request and communicate it
to the network operator.
o MDSC: This entity is responsible for coordinating a L3VPN service
request (expressed via the Augmented L3SM) with the IP/MPLS PNC
and the Transport PNC. For TE services, one of the key
responsibilities of the MDSC is to coordinate with both the IP PNC
and the Transport PNC for the mapping of the Augmented L3VPN
Service Model to the ACTN VN model. In the VN/TE-tunnel binding
case, the MDSC will need to coordinate with the Transport PNC to
dynamically create the TE-tunnels in the transport network as
needed. These tunnels are added as links in the IP/MPLS Layer
topology. The MDSC coordinates with IP/MPLS PNC to create the TE-
tunnels in the IP/MPLS layer, as part of the ACTN VN creation.
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o PNC: The Provisioning Network Controller is responsible for
configuring and operating the network devices. Figure 2 shows two
distinct PNCs.
* IP/MPLS PNC (PNC1): This entity is responsible for device
configuration to create PE-PE L3VPN tunnels for the VPN
customer and for the configuration of the L3VPN VRF on the PE
nodes. Each network element would select a tunnel based on the
configuration.
* Transport PNC (PNC2): This entity is responsible for device
configuration for TE tunnels in the transport networks.
There are four main interfaces shown in Figure 2.
o CMI: The CNC-MDSC Interface is used to communicate service
requests from the customer to the operator. The requests may be
expressed as Augmented VPN service requests (L2SM, L3SM), as
connectivity requests (L1CSM), or as virtual network requests
(ACTN VN).
o MPI: The MDSC-PNC Interface is used by the MDSC to orchestrate
networks under the control of PNCs. The requests on this
interface may use TE tunnel models, TE topology models, VPN
network configuration models or layer one connectivity models.
o SBI: The Southbound Interface is used by the PNC to control
network devices and is out of scope for this document.
The TE Service Mapping Model as described in this document can be
used to see the mapping between service models and VN models and TE
Tunnel/Topology models. That mapping may occur in the CNC if a
service request is mapped to a VN request. Or it may occur in the
MDSC where a service request is mapped to a TE tunnel, TE topology,
or VPN network configuration model. The TE Service Mapping Model may
be read from the CNC or MDSC to understand how the mapping has been
made and to see the purpose for which network resources are used.
As shown in Figure 2, the MDSC may be used recursively. For example,
the CNC might map a L3SM request to a VN request that it sends to a
recursive MDSC.
The high-level control flows for one example are as follows:
1. A customer asks for an L3VPN between CE1 and CE2 using the
Augmented L3SM model.
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2. The MDSC considers the service request and local policy to
determine if it needs to create a new VN or any TE Topology, and
if that is the case, ACTN VN YANG [I-D.ietf-teas-actn-vn-yang] is
used to configure a new VN based on this VPN and map the VPN
service to the ACTN VN. In case an existing tunnel is to be
used, each device will select which tunnel to use and populate
this mapping information.
3. The MDSC interacts with both the IP/MPLS PNC and the Transport
PNC to create a PE-PE tunnel in the IP network mapped to a TE
tunnel in the transport network by providing the inter-layer
access points and tunnel requirements. The specific service
information is passed to the IP/MPLS PNC for the actual VPN
configuration and activation.
A. The Transport PNC creates the corresponding TE tunnel
matching with the access point and egress point.
B. The IP/MPLS PNC maps the VPN ID with the corresponding TE
tunnel ID to bind these two IDs.
4. The IP/MPLS PNC creates/updates a VRF instance for this VPN
customer. This is not in the scope of this document.
4.1. Service Mapping
Augmented L3SM and L2SM can be used to request VPN service creation
including the creation of sites and corresponding site network access
connection between CE and PE. A VPN-ID is used to identify each VPN
service ordered by the customer. The ACTN VN can be used further to
establish PE-to-PE connectivity between VPN sites belonging to the
same VPN service. A VN-ID is used to identify each virtual network
established between VPN sites.
Once the ACTN VN has been established over the TE network (maybe a
new VN, maybe modification of an existing VN, or maybe the use of an
unmodified existing VN), the mapping between the VPN service and the
ACTN VN service can be created.
4.2. Site Mapping
The elements in Augmented L3SM and L2SM define site location
parameters and constraints such as distance and access diversity that
can influence the placement of network attachment points (i.e,
virtual network access points (VNAP)). To achieve this, a central
directory can be set up to establish the mapping between location
parameters and constraints and network attachment point location.
Suppose multiple attachment points are matched, the management system
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can use constraints or other local policy to select the best
candidate network attachment points.
After a network attachment point is selected, the mapping between VPN
site and VNAP can be established as shown in Table 1.
+-------+---------+------------------+------------------------+-----+
| Site | Site | Location | Access Diversity | PE |
| | Network | (Address, Postal | (Constraint-Type, | |
| | Access | Code, State, | Group-id,Target Group- | |
| | | City,Country | id) | |
| | | Code) | | |
+-------+---------+------------------+------------------------+-----+
| SITE1 | ACCESS1 | (,,US,NewYork,) | (10,PE-Diverse,10) | PE1 |
+-------+---------+------------------+------------------------+-----+
| SITE2 | ACCESS2 | (,,CN,Beijing,) | (10,PE-Diverse,10) | PE2 |
+-------+---------+------------------+------------------------+-----+
| SITE3 | ACCESS3 | (,,UK,London, ) | (12,same-PE,12) | PE4 |
+-------+---------+------------------+------------------------+-----+
| SITE4 | ACCESS4 | (,,FR,Paris,) | (20,Bearer-Diverse,20) | PE7 |
+-------+---------+------------------+------------------------+-----+
Table 2: : Mapping Between VPN Site and VNAP
5. Applicability of TE-Service Mapping in Generic context
As discussed in the Introduction Section, the models presented in
this document are also applicable generically outside of the ACTN
architecture. [RFC8309] defines Customer Service Model between
Customer and Service Orchestrator and Service Delivery Model between
Service Orchestrator and Network Orchestrator(s). TE-Service mapping
models defined in this document can be regarded primarily as Customer
Service Model and secondarily as Service Deliver Model.
6. YANG Data Trees
6.1. Service Models
6.1.1. L3SM
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module: ietf-l3sm-te-service-mapping
augment /l3vpn-svc:l3vpn-svc/l3vpn-svc:vpn-services
/l3vpn-svc:vpn-service:
+--rw te-service-mapping!
+--rw te-mapping
+--rw map-type? identityref
+--rw availability-type? identityref
+--rw (te)?
+--:(vn)
| +--rw vn-ref? -> /vn:vn/vn-list/vn-id
+--:(te-topo)
| +--rw vn-topology-id? te-types:te-topology-id
| +--rw abstract-node?
| -> /nw:networks/network/node/node-id
+--:(te-tunnel)
+--rw te-tunnel-list* te:tunnel-ref
augment /l3vpn-svc:l3vpn-svc/l3vpn-svc:sites/l3vpn-svc:site
/l3vpn-svc:site-network-accesses
/l3vpn-svc:site-network-access:
+--rw (te)?
+--:(vn)
| +--rw vn-ref?
| -> /vn:ap/access-point-list/access-point-id
+--:(te)
+--rw ltp? te-types:te-tp-id
6.1.2. L2SM
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module: ietf-l2sm-te-service-mapping
augment /l2vpn-svc:l2vpn-svc/l2vpn-svc:vpn-services
/l2vpn-svc:vpn-service:
+--rw te-service-mapping!
+--rw te-mapping
+--rw map-type? identityref
+--rw availability-type? identityref
+--rw (te)?
+--:(vn)
| +--rw vn-ref? -> /vn:vn/vn-list/vn-id
+--:(te-topo)
| +--rw vn-topology-id? te-types:te-topology-id
| +--rw abstract-node?
| -> /nw:networks/network/node/node-id
+--:(te-tunnel)
+--rw te-tunnel-list* te:tunnel-ref
augment /l2vpn-svc:l2vpn-svc/l2vpn-svc:sites/l2vpn-svc:site
/l2vpn-svc:site-network-accesses
/l2vpn-svc:site-network-access:
+--rw (te)?
+--:(vn)
| +--rw vn-ref?
| -> /vn:ap/access-point-list/access-point-id
+--:(te)
+--rw ltp? te-types:te-tp-id
6.1.3. L1CSM
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module: ietf-l1csm-te-service-mapping
augment /l1csm:l1-connectivity/l1csm:services/l1csm:service:
+--rw te-service-mapping!
+--rw te-mapping
+--rw map-type? identityref
+--rw availability-type? identityref
+--rw (te)?
+--:(vn)
| +--rw vn-ref? -> /vn:vn/vn-list/vn-id
+--:(te-topo)
| +--rw vn-topology-id? te-types:te-topology-id
| +--rw abstract-node?
| -> /nw:networks/network/node/node-id
+--:(te-tunnel)
+--rw te-tunnel-list* te:tunnel-ref
augment /l1csm:l1-connectivity/l1csm:access/l1csm:unis/l1csm:uni:
+--rw (te)?
+--:(vn)
| +--rw vn-ref?
| -> /vn:ap/access-point-list/access-point-id
+--:(te)
+--rw ltp? te-types:te-tp-id
6.2. Network Models
6.2.1. L3NM
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module: ietf-l3nm-te-service-mapping
augment /l3vpn-ntw:l3vpn-ntw/l3vpn-ntw:vpn-services
/l3vpn-ntw:vpn-service:
+--rw te-service-mapping!
+--rw te-mapping
+--rw map-type? identityref
+--rw availability-type? identityref
+--rw (te)?
+--:(vn)
| +--rw vn-ref? -> /vn:vn/vn-list/vn-id
+--:(te-topo)
| +--rw vn-topology-id? te-types:te-topology-id
| +--rw abstract-node?
| -> /nw:networks/network/node/node-id
+--:(te-tunnel)
+--rw te-tunnel-list* te:tunnel-ref
augment /l3vpn-ntw:l3vpn-ntw/l3vpn-ntw:vpn-services
/l3vpn-ntw:vpn-service/l3vpn-ntw:vpn-nodes
/l3vpn-ntw:vpn-node/l3vpn-ntw:vpn-network-accesses
/l3vpn-ntw:vpn-network-access:
+--rw (te)?
+--:(vn)
| +--rw vn-ref?
| -> /vn:ap/access-point-list/access-point-id
+--:(te)
+--rw ltp? te-types:te-tp-id
6.2.2. L2NM
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module: ietf-l2nm-te-service-mapping
augment /l2vpn-ntw:l2vpn-ntw/l2vpn-ntw:vpn-services
/l2vpn-ntw:vpn-svc:
+--rw te-service-mapping!
+--rw te-mapping
+--rw map-type? identityref
+--rw availability-type? identityref
+--rw (te)?
+--:(vn)
| +--rw vn-ref? -> /vn:vn/vn-list/vn-id
+--:(te-topo)
| +--rw vn-topology-id? te-types:te-topology-id
| +--rw abstract-node?
| -> /nw:networks/network/node/node-id
+--:(te-tunnel)
+--rw te-tunnel-list* te:tunnel-ref
augment /l2vpn-ntw:l2vpn-ntw/l2vpn-ntw:vpn-services
/l2vpn-ntw:vpn-svc/l2vpn-ntw:vpn-nodes
/l2vpn-ntw:vpn-node/l2vpn-ntw:vpn-network-accesses
/l2vpn-ntw:vpn-network-access:
+--rw (te)?
+--:(vn)
| +--rw vn-ref?
| -> /vn:ap/access-point-list/access-point-id
+--:(te)
+--rw ltp? te-types:te-tp-id
7. YANG Data Models
The YANG codes are as follows:
7.1. ietf-te-service-mapping-types
<CODE BEGINS> file "ietf-te-service-mapping-types@2020-03-08.yang"
module ietf-te-service-mapping-types {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-te-service-mapping-types";
prefix tsm;
import ietf-te-types {
prefix te-types;
reference
"I-D.ietf-teas-yang-te-types: Traffic Engineering Common YANG
Types";
}
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import ietf-network {
prefix nw;
reference
"RFC 8345: A YANG Data Model for Network Topologies";
}
import ietf-te {
prefix te;
reference
"I-D.ietf-teas-yang-te: A YANG Data Model for Traffic
Engineering Tunnels and Interfaces";
}
import ietf-vn {
prefix vn;
reference
"I-D.ietf-teas-actn-vn-yang: A Yang Data Model for VN Operation";
}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for TE & Service mapping
parameters and policies as a common grouping applicable to
variuous service models (e.g., L1CSM, L2SM, L3SM, etc.)
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
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The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Identity for map-type
*/
identity map-type {
description
"Base identity from which specific map types are derived.";
}
identity new {
base map-type;
description
"The new VN/tunnels are binded to the service.";
}
identity hard-isolation {
base new;
description
"Hard isolation.";
}
identity detnet-hard-isolation {
base hard-isolation;
description
"Hard isolation with deterministic characteristics.";
}
identity soft-isolation {
base new;
description
"Soft-isolation.";
}
identity select {
base map-type;
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description
"The VPN service selects an existing tunnel with no
modification.";
}
identity modify {
base map-type;
description
"The VPN service selects an existing tunnel and allows to modify
the properties of the tunnel (e.g., b/w)";
}
/*
* Identity for availability-type
*/
identity availability-type {
description
"Base identity from which specific map types are derived.";
}
identity level-1 {
base availability-type;
description
"level 1: 99.9999%";
}
identity level-2 {
base availability-type;
description
"level 2: 99.999%";
}
identity level-3 {
base availability-type;
description
"level 3: 99.99%";
}
identity level-4 {
base availability-type;
description
"level 4: 99.9%";
}
identity level-5 {
base availability-type;
description
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"level 5: 99%";
}
/*
* Groupings
*/
grouping te-ref {
description
"The reference to TE.";
choice te {
description
"The TE";
case vn {
leaf vn-ref {
type leafref {
path "/vn:vn/vn:vn-list/vn:vn-id";
}
description
"The reference to VN";
reference
"RFC 8453: Framework for Abstraction and Control of TE
Networks (ACTN)";
}
}
case te-topo {
leaf vn-topology-id {
type te-types:te-topology-id;
description
"An identifier to the TE Topology Model where the abstract
nodes and links of the Topology can be found for Type 2
VNS";
reference
"I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
Engineering (TE) Topologies";
}
leaf abstract-node {
type leafref {
path "/nw:networks/nw:network/nw:node/nw:node-id";
}
description
"A reference to the abstract node in TE Topology";
reference
"I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
Engineering (TE) Topologies";
}
}
case te-tunnel {
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leaf-list te-tunnel-list {
type te:tunnel-ref;
description
"Reference to TE Tunnels";
reference
"I-D.ietf-teas-yang-te: A YANG Data Model for Traffic
Engineering Tunnels and Interfaces";
}
}
}
}
//grouping
grouping te-endpoint-ref {
description
"The reference to TE endpoints.";
choice te {
description
"The TE";
case vn {
leaf vn-ref {
type leafref {
path "/vn:ap/vn:access-point-list/vn:access-point-id";
}
description
"The reference to VN AP";
reference
"RFC 8453: Framework for Abstraction and Control of TE
Networks (ACTN)";
}
}
case te {
leaf ltp {
type te-types:te-tp-id;
description
"Reference LTP in the TE-topology";
reference
"I-D.ietf-teas-yang-te-topo: YANG Data Model for Traffic
Engineering (TE) Topologies";
}
}
}
}
//grouping
grouping te-mapping {
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description
"Mapping between Services and TE";
container te-mapping {
description
"Mapping between Services and TE";
leaf map-type {
type identityref {
base map-type;
}
description
"Isolation Requirements, Tunnel Bind or
Tunnel Selection";
}
leaf availability-type {
type identityref {
base availability-type;
}
description
"Availability Requirement for the Service";
}
uses te-ref;
}
}
//grouping
}
<CODE ENDS>
7.2. Service Models
7.2.1. ietf-l3sm-te-service-mapping
<CODE BEGINS> file "ietf-l3sm-te-service-mapping@2020-03-08.yang"
module ietf-l3sm-te-service-mapping {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-l3sm-te-service-mapping";
prefix l3-tsm;
import ietf-te-service-mapping-types {
prefix tsm-types;
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
import ietf-l3vpn-svc {
prefix l3vpn-svc;
reference
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"RFC 8299: YANG Data Model for L3VPN Service Delivery";
}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for the mapping of Layer 3
Service Model (L3SM) to the TE and VN.
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Augmentation to L3SM
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*/
augment "/l3vpn-svc:l3vpn-svc/l3vpn-svc:vpn-services"
+ "/l3vpn-svc:vpn-service" {
description
"L3SM augmented to include TE parameters and mapping";
container te-service-mapping {
presence "Indicates L3 service to TE mapping";
description
"Container to augment l3sm to TE parameters and mapping";
uses tsm-types:te-mapping;
}
}
//augment
augment "/l3vpn-svc:l3vpn-svc/l3vpn-svc:sites/l3vpn-svc:site"
+ "/l3vpn-svc:site-network-accesses"
+ "/l3vpn-svc:site-network-access" {
description
"This augment is only valid for TE mapping of L3SM network-access
to TE endpoints";
uses tsm-types:te-endpoint-ref;
}
//augment
}
<CODE ENDS>
7.2.2. ietf-l2sm-te-service-mapping
<CODE BEGINS> file "ietf-l2sm-te-service-mapping@2020-03-08.yang"
module ietf-l2sm-te-service-mapping {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-l2sm-te-service-mapping";
prefix l2-tsm;
import ietf-te-service-mapping-types {
prefix tsm-types;
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
import ietf-l2vpn-svc {
prefix l2vpn-svc;
reference
"RFC 8466: A YANG Data Model for Layer 2 Virtual Private Network
Lee, et al. Expires September 9, 2020 [Page 26]
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(L2VPN) Service Delivery";
}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for the mapping of Layer 2
Service Model (L2SM) to the TE and VN.
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Augmentation to L3SM
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*/
augment "/l2vpn-svc:l2vpn-svc/l2vpn-svc:vpn-services/"
+ "l2vpn-svc:vpn-service" {
description
"L2SM augmented to include TE parameters and mapping";
container te-service-mapping {
presence "indicates L2 service to te mapping";
description
"Container to augment L2SM to TE parameters and mapping";
uses tsm-types:te-mapping;
}
}
//augment
augment "/l2vpn-svc:l2vpn-svc/l2vpn-svc:sites/l2vpn-svc:site"
+ "/l2vpn-svc:site-network-accesses"
+ "/l2vpn-svc:site-network-access" {
description
"This augment is only valid for TE mapping of L2SM network-access
to TE endpoints";
uses tsm-types:te-endpoint-ref;
}
//augment
}
<CODE ENDS>
7.2.3. ietf-l1csm-te-service-mapping
<CODE BEGINS> file "ietf-l1csm-te-service-mapping@2020-03-08.yang"
module ietf-l1csm-te-service-mapping {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-l1csm-te-service-mapping";
prefix l1-tsm;
import ietf-te-service-mapping-types {
prefix tsm-types;
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
import ietf-l1csm {
prefix l1csm;
reference
"I-D.ietf-ccamp-l1csm-yang: A YANG Data Model for L1 Connectivity
Lee, et al. Expires September 9, 2020 [Page 28]
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Service Model (L1CSM)";
}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for the mapping of
Layer 1 Connectivity Service Module (L1CSM) to the TE and VN
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Augmentation to L1CSM
Lee, et al. Expires September 9, 2020 [Page 29]
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*/
augment "/l1csm:l1-connectivity/l1csm:services/l1csm:service" {
description
"L1CSM augmented to include TE parameters and mapping";
container te-service-mapping {
presence "Indicates L1 service to TE mapping";
description
"Container to augment L1CSM to TE parameters and mapping";
uses tsm-types:te-mapping;
}
}
//augment
augment "/l1csm:l1-connectivity/l1csm:access/l1csm:unis/"
+ "l1csm:uni" {
description
"This augment is only valid for TE mapping of L1CSM UNI to TE
endpoints";
uses tsm-types:te-endpoint-ref;
}
//augment
}
<CODE ENDS>
7.3. Network Models
7.3.1. ietf-l3nm-te-service-mapping
<CODE BEGINS> file "ietf-l3nm-te-service-mapping@2020-03-08.yang"
module ietf-l3nm-te-service-mapping {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-l3nm-te-service-mapping";
prefix l3nm-tsm;
import ietf-te-service-mapping-types {
prefix tsm-types;
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
import ietf-l3vpn-ntw {
prefix l3vpn-ntw;
reference
"I-D.ietf-opsawg-l3sm-l3nm: A Layer 3 VPN Network YANG Model";
Lee, et al. Expires September 9, 2020 [Page 30]
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}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for the mapping of Layer 3
Network Model (L3NM) to the TE and VN.
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Augmentation to L3NM
*/
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augment "/l3vpn-ntw:l3vpn-ntw/l3vpn-ntw:vpn-services"
+ "/l3vpn-ntw:vpn-service" {
description
"L3SM augmented to include TE parameters and mapping";
container te-service-mapping {
presence "Indicates L3 network to TE mapping";
description
"Container to augment l3nm to TE parameters and mapping";
uses tsm-types:te-mapping;
}
}
//augment
augment "/l3vpn-ntw:l3vpn-ntw/l3vpn-ntw:vpn-services"
+ "/l3vpn-ntw:vpn-service"
+ "/l3vpn-ntw:vpn-nodes/l3vpn-ntw:vpn-node"
+ "/l3vpn-ntw:vpn-network-accesses"
+ "/l3vpn-ntw:vpn-network-access" {
description
"This augment is only valid for TE mapping of L3NM network-access
to TE endpoints";
uses tsm-types:te-endpoint-ref;
}
//augment
}
<CODE ENDS>
7.3.2. ietf-l2nm-te-service-mapping
<CODE BEGINS> file "ietf-l2nm-te-service-mapping@2020-03-08.yang"
module ietf-l2nm-te-service-mapping {
yang-version 1.1;
namespace
"urn:ietf:params:xml:ns:yang:ietf-l2nm-te-service-mapping";
prefix l2nm-tsm;
import ietf-te-service-mapping-types {
prefix tsm-types;
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
import ietf-l2vpn-ntw {
prefix l2vpn-ntw;
reference
"I-D.-barguil-opsawg-l2sm-l2nm: A Layer 2 VPN Network YANG Model";
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}
organization
"IETF Traffic Engineering Architecture and Signaling (TEAS)
Working Group";
contact
"WG Web: <http://tools.ietf.org/wg/teas/>
WG List: <mailto:teas@ietf.org>
Editor: Young Lee
<mailto:younglee.tx@gmail.com>
Editor: Dhruv Dhody
<mailto:dhruv.ietf@gmail.com>
Editor: Qin Wu
<mailto:bill.wu@huawei.com>";
description
"This module contains a YANG module for the mapping of Layer 2
Network Model (L2NM) to the TE and VN.
Copyright (c) 2020 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
(https://trustee.ietf.org/license-info).
This version of this YANG module is part of RFC XXXX; see the
RFC itself for full legal notices.
The key words 'MUST', 'MUST NOT', 'REQUIRED', 'SHALL', 'SHALL
NOT', 'SHOULD', 'SHOULD NOT', 'RECOMMENDED', 'NOT RECOMMENDED',
'MAY', and 'OPTIONAL' in this document are to be interpreted as
described in BCP 14 (RFC 2119) (RFC 8174) when, and only when,
they appear in all capitals, as shown here.";
revision 2020-03-08 {
description
"Initial revision.";
reference
"RFC XXXX: Traffic Engineering and Service Mapping Yang Model";
}
/*
* Augmentation to L2NM
*/
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augment "/l2vpn-ntw:l2vpn-ntw/l2vpn-ntw:vpn-services"
+ "/l2vpn-ntw:vpn-svc" {
description
"L2SM augmented to include TE parameters and mapping";
container te-service-mapping {
presence "Indicates L2 network to TE mapping";
description
"Container to augment l2nm to TE parameters and mapping";
uses tsm-types:te-mapping;
}
}
//augment
augment "/l2vpn-ntw:l2vpn-ntw/l2vpn-ntw:vpn-services"
+ "/l2vpn-ntw:vpn-svc"
+ "/l2vpn-ntw:vpn-nodes/l2vpn-ntw:vpn-node"
+ "/l2vpn-ntw:vpn-network-accesses"
+ "/l2vpn-ntw:vpn-network-access" {
description
"This augment is only valid for TE mapping of L2NM network-access
to TE endpoints";
uses tsm-types:te-endpoint-ref;
}
//augment
}
<CODE ENDS>
8. Security Considerations
The YANG modules defined in this document is designed to be accessed
via network management protocol such as NETCONF [RFC6241] or RESTCONF
[RFC8040]. The lowest NETCONF layer is the secure transport layer
and the mandatory-to-implement secure transport is SSH [RFC6242].
The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement
secure transport is TLS [RFC8446]
The NETCONF access control model [RFC8341] provides the means to
restrict access for particular NETCONF or RESTCONF users to a pre-
configured subset of all available NETCONF or RESTCONF protocol
operations and content.
There are a number of data nodes defined in the YANG moduleS which
are writable/creatable/deletable (i.e., config true, which is the
default). These data nodes may be considered sensitive or vulnerable
in some network environments. Write operations (e.g., <edit-config>)
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to these data nodes without proper protection can have a negative
effect on network operations. These are the subtrees and data nodes
and their sensitivity/vulnerability:
o /l3vpn-svc/vpn-services/vpn-service/te-service-mapping/te-mapping/
- configure TE Service mapping.
o /l3vpn-svc/sites/site/site-network-accesses/site-network-access/
te/ - configure TE Endpoint mapping.
o /l2vpn-svc/vpn-services/vpn-service/te-service-mapping/te-mapping/
- configure TE Service mapping.
o /l2vpn-svc/sites/site/site-network-accesses/site-network-access/
te/ - configure TE Endpoint mapping.
o /l1-connectivity/services/service/te-service-mapping/te-mapping/ -
configure TE Service mapping.
o /l1-connectivity/access/unis/uni/te/ - configure TE Endpoint
mapping.
o /l3vpn-ntw/vpn-services/vpn-service/te-service-mapping/te-mapping/
- configure TE Network mapping.
o /l3vpn-ntw/vpn-services/vpn-service/vpn-nodes/vpn-node/vpn-
network-accesses/vpn-network-access/te/ - configure TE Endpoint
mapping.
o /l2vpn-ntw/vpn-services/vpn-service/te-service-mapping/te-mapping/
- configure TE Network mapping.
o /l2vpn-ntw/vpn-services/vpn-service/vpn-nodes/vpn-node/vpn-
network-accesses/vpn-network-access/te/ - configure TE Endpoint
mapping.
Unauthorized access to above list can adversely affect the VPN
service.
Some of the readable data nodes in the YANG module may be considered
sensitive or vulnerable in some network environments. It is thus
important to control read access (e.g., via get, get-config, or
notification) to these data nodes. The TE related parameters
attached to the VPN service can leak sensitive information about the
network. This is apploicable to all elements in the yang models
defined in this document.
This document has no RPC defined.
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9. IANA Considerations
This document request the IANA to register four URIs in the "IETF XML
Registry" [RFC3688]. Following the format in RFC 3688, the following
registrations are requested -
URI: urn:ietf:params:xml:ns:yang:ietf-te-service-mapping-types
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-l3sm-te-service-mapping
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-l2sm-te-service-mapping
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-l1csm-te-service-mapping
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-l3nm-te-service-mapping
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
URI: urn:ietf:params:xml:ns:yang:ietf-l2nm-te-service-mapping
Registrant Contact: The IESG.
XML: N/A, the requested URI is an XML namespace.
This document request the IANA to register four YANG modules in the
"YANG Module Names" registry [RFC6020], as follows -
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Name: ietf-te-service-mapping-types
Namespace: urn:ietf:params:xml:ns:yang:ietf-te-service-mapping-types
Prefix: tsm
Reference: [This.I-D]
Name: ietf-l3sm-te-service-mapping
Namespace: urn:ietf:params:xml:ns:yang:ietf-l3sm-te-service-mapping
Prefix: l3-tsm
Reference: [This.I-D]
Name: ietf-l2sm-te-service-mapping
Namespace: urn:ietf:params:xml:ns:yang:ietf-l2sm-te-service-mapping
Prefix: l2-tsm
Reference: [This.I-D]
Name: ietf-l1csm-te-service-mapping
Namespace: urn:ietf:params:xml:ns:yang:ietf-l1csm-te-service-mapping
Prefix: l1-tsm
Reference: [This.I-D]
Name: ietf-l3nm-te-service-mapping
Namespace: urn:ietf:params:xml:ns:yang:ietf-l3nm-te-service-mapping
Prefix: l3nm-tsm
Reference: [This.I-D]
Name: ietf-l2nm-te-service-mapping
Namespace: urn:ietf:params:xml:ns:yang:ietf-l2nm-te-service-mapping
Prefix: l2nm-tsm
Reference: [This.I-D]
10. Acknowledgements
We thank Diego Caviglia, Igor Bryskin, Oscar Gonzalez de Dios, and
Samier Barguil Giraldo for useful discussions and motivation for this
work.
11. References
11.1. Normative References
[RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688,
DOI 10.17487/RFC3688, January 2004,
<https://www.rfc-editor.org/info/rfc3688>.
[RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure
Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011,
<https://www.rfc-editor.org/info/rfc6242>.
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[RFC7926] Farrel, A., Ed., Drake, J., Bitar, N., Swallow, G.,
Ceccarelli, D., and X. Zhang, "Problem Statement and
Architecture for Information Exchange between
Interconnected Traffic-Engineered Networks", BCP 206,
RFC 7926, DOI 10.17487/RFC7926, July 2016,
<https://www.rfc-editor.org/info/rfc7926>.
[RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language",
RFC 7950, DOI 10.17487/RFC7950, August 2016,
<https://www.rfc-editor.org/info/rfc7950>.
[RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF
Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017,
<https://www.rfc-editor.org/info/rfc8040>.
[RFC8299] Wu, Q., Ed., Litkowski, S., Tomotaki, L., and K. Ogaki,
"YANG Data Model for L3VPN Service Delivery", RFC 8299,
DOI 10.17487/RFC8299, January 2018,
<https://www.rfc-editor.org/info/rfc8299>.
[RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
<https://www.rfc-editor.org/info/rfc8340>.
[RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration
Access Control Model", STD 91, RFC 8341,
DOI 10.17487/RFC8341, March 2018,
<https://www.rfc-editor.org/info/rfc8341>.
[RFC8345] Clemm, A., Medved, J., Varga, R., Bahadur, N.,
Ananthakrishnan, H., and X. Liu, "A YANG Data Model for
Network Topologies", RFC 8345, DOI 10.17487/RFC8345, March
2018, <https://www.rfc-editor.org/info/rfc8345>.
[RFC8446] Rescorla, E., "The Transport Layer Security (TLS) Protocol
Version 1.3", RFC 8446, DOI 10.17487/RFC8446, August 2018,
<https://www.rfc-editor.org/info/rfc8446>.
[RFC8466] Wen, B., Fioccola, G., Ed., Xie, C., and L. Jalil, "A YANG
Data Model for Layer 2 Virtual Private Network (L2VPN)
Service Delivery", RFC 8466, DOI 10.17487/RFC8466, October
2018, <https://www.rfc-editor.org/info/rfc8466>.
[I-D.ietf-ccamp-l1csm-yang]
Lee, Y., Lee, K., Zheng, H., Dhody, D., Dios, O., and D.
Ceccarelli, "A YANG Data Model for L1 Connectivity Service
Model (L1CSM)", draft-ietf-ccamp-l1csm-yang-10 (work in
progress), September 2019.
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[I-D.ietf-teas-actn-vn-yang]
Lee, Y., Dhody, D., Ceccarelli, D., Bryskin, I., and B.
Yoon, "A Yang Data Model for VN Operation", draft-ietf-
teas-actn-vn-yang-07 (work in progress), October 2019.
[I-D.ietf-teas-yang-te]
Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
"A YANG Data Model for Traffic Engineering Tunnels and
Interfaces", draft-ietf-teas-yang-te-22 (work in
progress), November 2019.
[I-D.ietf-teas-yang-te-types]
Saad, T., Gandhi, R., Liu, X., Beeram, V., and I. Bryskin,
"Traffic Engineering Common YANG Types", draft-ietf-teas-
yang-te-types-13 (work in progress), November 2019.
[I-D.ietf-opsawg-l3sm-l3nm]
Aguado, A., Dios, O., Lopezalvarez, V., Voyer, D., and L.
Munoz, "A Layer 3 VPN Network YANG Model", draft-ietf-
opsawg-l3sm-l3nm-01 (work in progress), November 2019.
[I-D.barguil-opsawg-l2sm-l2nm]
Barguil, S., Dios, O., Lopezalvarez, V., Munoz, L., and L.
Jalil, "A Layer 2 VPN Network Yang Model", draft-barguil-
opsawg-l2sm-l2nm-00 (work in progress), December 2019.
11.2. Informative References
[RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for
the Network Configuration Protocol (NETCONF)", RFC 6020,
DOI 10.17487/RFC6020, October 2010,
<https://www.rfc-editor.org/info/rfc6020>.
[RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed.,
and A. Bierman, Ed., "Network Configuration Protocol
(NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011,
<https://www.rfc-editor.org/info/rfc6241>.
[RFC8199] Bogdanovic, D., Claise, B., and C. Moberg, "YANG Module
Classification", RFC 8199, DOI 10.17487/RFC8199, July
2017, <https://www.rfc-editor.org/info/rfc8199>.
[RFC8309] Wu, Q., Liu, W., and A. Farrel, "Service Models
Explained", RFC 8309, DOI 10.17487/RFC8309, January 2018,
<https://www.rfc-editor.org/info/rfc8309>.
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[RFC8342] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K.,
and R. Wilton, "Network Management Datastore Architecture
(NMDA)", RFC 8342, DOI 10.17487/RFC8342, March 2018,
<https://www.rfc-editor.org/info/rfc8342>.
[RFC8453] Ceccarelli, D., Ed. and Y. Lee, Ed., "Framework for
Abstraction and Control of TE Networks (ACTN)", RFC 8453,
DOI 10.17487/RFC8453, August 2018,
<https://www.rfc-editor.org/info/rfc8453>.
[I-D.ietf-teas-yang-te-topo]
Liu, X., Bryskin, I., Beeram, V., Saad, T., Shah, H., and
O. Dios, "YANG Data Model for Traffic Engineering (TE)
Topologies", draft-ietf-teas-yang-te-topo-22 (work in
progress), June 2019.
[I-D.ietf-teas-actn-yang]
Lee, Y., Zheng, H., Ceccarelli, D., Yoon, B., Dios, O.,
Shin, J., and S. Belotti, "Applicability of YANG models
for Abstraction and Control of Traffic Engineered
Networks", draft-ietf-teas-actn-yang-05 (work in
progress), February 2020.
Appendix A. Contributor Addresses
Adrian Farrel
Old Dog Consulting
EMail: adrian@olddog.co.uk
Italo Busi
Huawei Technologies
EMail: Italo.Busi@huawei.com
Haomian Zheng
Huawei Technologies
EMail: zhenghaomian@huawei.com
Authors' Addresses
Young Lee (editor)
Samsung Electronics
Email: younglee.tx@gmail.com
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Dhruv Dhody (editor)
Huawei Technologies
Email: dhruv.ietf@gmail.com
Giuseppe Fioccola
Huawei Technologies
Email: giuseppe.fioccola@huawei.com
Qin Wu (editor)
Huawei Technologies
Email: bill.wu@huawei.com
Daniele Ceccarelli
Ericsson
Torshamnsgatan,48
Stockholm, Sweden
Email: daniele.ceccarelli@ericsson.com
Jeff Tantsura
Apstra
Email: jefftant@gmail.com
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