CCAMP Working Group M. Ye, Ed. Internet-Draft A. Guo Intended status: Standards Track Huawei Technologies Expires: September 6, 2018 J. Ahlberg Ericsson AB X. Li NEC Laboratories Europe GmbH D. Spreafico Nokia - IT March 05, 2018 A YANG Data Model for Microwave Topology draft-ye-ccamp-mw-topo-yang-00 Abstract This document defines a YANG data model to describe the topologies of microwave/millimeter. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at https://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on September 6, 2018. Copyright Notice Copyright (c) 2018 IETF Trust and the persons identified as the document authors. All rights reserved. Ye, et al. Expires September 6, 2018 [Page 1] Internet-Draft Microwave Topology Model March 2018 This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Terminology and Definitions . . . . . . . . . . . . . . . . . 2 2. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 3. YANG Data Model (Tree Structure) . . . . . . . . . . . . . . 3 3.1. The YANG Tree . . . . . . . . . . . . . . . . . . . . . . 3 3.2. Relationship with microwave interface YANG model . . . . 3 4. YANG Module . . . . . . . . . . . . . . . . . . . . . . . . . 4 5. Security Considerations . . . . . . . . . . . . . . . . . . . 6 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 7 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 7 7.1. Normative References . . . . . . . . . . . . . . . . . . 7 7.2. Informative References . . . . . . . . . . . . . . . . . 8 Appendix A. Appendix A Examples of microwave topology . . . . . 9 A.1. Appendix A.1 A topology with single microwave radio link 9 A.2. Appendix A.2 A topology with microwave radio links bundling . . . . . . . . . . . . . . . . . . . . . . . . 11 Appendix B. Contributors . . . . . . . . . . . . . . . . . . . . 14 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 15 1. Terminology and Definitions The following acronyms are used in this document: PNC Provisioning Network Controller MDSC Multi Domain Service Coordinator 2. Introduction This document defines a YANG data model to describe the topologies of microwave/millimeter(hereafter microwave is used to simplify the text). The microwave topology model augments the TE topology model defines in [I-D.ietf-teas-yang-te-topo]. The microwave topology model is expected to be used between a Provisioning Network Controller(PNC) and a Multi Domain Service Ye, et al. Expires September 6, 2018 [Page 2] Internet-Draft Microwave Topology Model March 2018 Coordinator(MDSC)([I-D.ietf-teas-actn-framework]). Possible use cases of microwave topology models include: 1. The microwave link frequency could be used to understand the current frequency usage, enabling a whole view of the network topology information, and as an input for network frequency planning. 2. The microwave radio link could change its bandwidth according to the environments under the adatpive modulation mode, e.g., the bandwidth will degrade when there's a heavy rain. To get to know of current microwave link bandwidth is important for path computation and service provisioning across different technologies/networks. 3. Due to bandiwdth changing feature, availability is normally used to describe the microwave radio link characteristic. [RFC8330] defines a mechanism to report bandwidth-availability information through OSPF-TE. It's also necessary to include the information in the YANG data model to optimize the path/route computation. 3. YANG Data Model (Tree Structure) 3.1. The YANG Tree module: ietf-microwave-topology augment /nw:networks/nw:network/nw:network-types/tet:te-topology: +--rw mw-topology! augment /nw:networks/nw:network/nt:link/tet:te/tet:te-link-attributes: +--rw mw-link-frequency? uint32 +--rw mw-link-channel-separation? uint32 +--ro mw-link-nominal-bandwidth? rt-types:bandwidth-ieee-float32 +--ro mw-link-current-bandwidth? rt-types:bandwidth-ieee-float32 +--ro mw-link-availability* +--ro mw-link-availability rt-types:percentage +--ro mw-link-bandwidth rt-types:bandwidth-ieee-float32 3.2. Relationship with microwave interface YANG model [I-D.ietf-ccamp-mw-yang] defines an interface YANG model for microwave radio link which is used between the PNC and the physical device for device configuration. The PNC is able to convert the information received from the topology model into the interface model. For example, the link frequency in the topology model is mapped to the tx-frequency of the carrier termination in the interface model. Ye, et al. Expires September 6, 2018 [Page 3] Internet-Draft Microwave Topology Model March 2018 4. YANG Module file "ietf-microwave-topology.yang" module ietf-microwave-topology { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-microwave-topology"; prefix "mwtopo"; import ietf-network { prefix "nw"; } import ietf-network-topology { prefix "nt"; } import ietf-te-topology { prefix "tet"; } import ietf-routing-types { prefix "rt-types"; } organization "Internet Engineering Task Force (IETF) CCAMP WG"; contact " WG List: ID-draft authors: Min Ye (amy.yemin@huawei.com); Aihua Guo (aihuaguo@huawei.com); Jonas Ahlberg (jonas.ahlberg@ericsson.com); Xi Li (Xi.Li@neclab.eu); Daniela Spreafico (daniela.spreafico@nokia.com) "; description "This is a module for microwave topology."; revision 2018-03-05 { description "Initial version."; reference ""; Ye, et al. Expires September 6, 2018 [Page 4] Internet-Draft Microwave Topology Model March 2018 } /* * Groupings */ grouping mw-link-attributes { description "Microwave link attributes"; leaf mw-link-frequency { type uint32; units "kHz"; description "Frequency of the link"; } leaf mw-link-channel-separation { type uint32; units "kHz"; description "The distance between adjacent channels in a radio frequency channel arrangement used in this link"; reference "ETSI EN 302 217-1"; } leaf mw-link-nominal-bandwidth { type rt-types:bandwidth-ieee-float32; units "Mbps"; description "The nominal bandwidth of the link"; } leaf mw-link-current-bandwidth { type rt-types:bandwidth-ieee-float32; units "Mbps"; description "The current bandwidth of the link"; } list mw-link-availability{ key "availability"; description "List of availability and its corresponding link bandwidth"; leaf availability { type rt-types:percentage; description "availability level of the link"; } leaf mw-link-bandwidth { type rt-types:bandwidth-ieee-float32; Ye, et al. Expires September 6, 2018 [Page 5] Internet-Draft Microwave Topology Model March 2018 units "Mbps"; description "the bandwidth corresponding to the availability level"; } } } /* * Data nodes */ augment "/nw:networks/nw:network/nw:network-types/" + "tet:te-topology" { container mw-topology { presence "indicates a topology type of microwave."; description "microwave topology type"; } description "augment network types to include microwave network"; } augment "/nw:networks/nw:network/nt:link/tet:te/" + "tet:te-link-attributes" { when "../../../nw:network-types/tet:te-topology/" + "mwtopo:mw-topology" { description "This augment is only valid for microwave."; } description "Microwave link augmentation"; uses mw-link-attributes; } } 5. Security Considerations The YANG module specified in this document defines a schema for data that is designed to be accessed via network management protocols such as NETCONF [RFC6241] or RESTCONF [RFC8040][RFC8040]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to- implement secure transport is Secure Shell (SSH) [RFC6242]. The lowest RESTCONF layer is HTTPS, and the mandatory-to-implement secure transport is TLS [RFC5246]. The NETCONF access control model [RFC6536] provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. Ye, et al. Expires September 6, 2018 [Page 6] Internet-Draft Microwave Topology Model March 2018 There are a number of data nodes defined in this YANG module that 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) 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: TBD.(list subtrees and data nodes and state why they are sensitive) Some of the readable data nodes in this 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. These are the subtrees and data nodes and their sensitivity/vulnerability: TBD.(list subtrees and data nodes and state why they are sensitive) 6. IANA Considerations IANA has assigned a new URI from the "IETF XML Registry" [RFC3688]. URI: urn:ietf:params:xml:ns:yang:ietf-microwave-topology Registrant Contact: The IESG XML: N/A; the requested URI is an XML namespace. IANA has recorded a YANG module name in the "YANG Module Names" registry [RFC6020] as follows: Name: ietf-microwave-topology Namespace: urn:ietf:params:xml:ns:yang:ietf-microwave-topology Prefix: mwtopo Reference: RFC xxxx 7. References 7.1. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . Ye, et al. Expires September 6, 2018 [Page 7] Internet-Draft Microwave Topology Model March 2018 [RFC5246] Dierks, T. and E. Rescorla, "The Transport Layer Security (TLS) Protocol Version 1.2", RFC 5246, DOI 10.17487/RFC5246, August 2008, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [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, . [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, . [RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration Protocol (NETCONF) Access Control Model", RFC 6536, DOI 10.17487/RFC6536, March 2012, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . 7.2. Informative References [I-D.ietf-ccamp-mw-yang] Ahlberg, J., Ye, M., Li, X., Spreafico, D., and M. Vaupotic, "A YANG Data Model for Microwave Radio Link", draft-ietf-ccamp-mw-yang-04 (work in progress), March 2018. [I-D.ietf-teas-actn-framework] Ceccarelli, D. and Y. Lee, "Framework for Abstraction and Control of Traffic Engineered Networks", draft-ietf-teas- actn-framework-11 (work in progress), October 2017. [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-15 (work in progress), February 2018. Ye, et al. Expires September 6, 2018 [Page 8] Internet-Draft Microwave Topology Model March 2018 [RFC8330] Long, H., Ye, M., Mirsky, G., D'Alessandro, A., and H. Shah, "OSPF Traffic Engineering (OSPF-TE) Link Availability Extension for Links with Variable Discrete Bandwidth", RFC 8330, DOI 10.17487/RFC8330, February 2018, . Appendix A. Appendix A Examples of microwave topology A.1. Appendix A.1 A topology with single microwave radio link Microwave is a transport technology which can be used to transport client services, such as ETH. When an ETH service is transported by a single microwave radio link, the topology could be shown as the Figure 3. Note that the figure just shows an example, there might be other possiblities to demonstrate the topology. Node 1 Node 2 +---------------+ +---------------+ | | | | | +-----------+ | | +-----------+ | | | LTP11 | | | | LTP21 | | --ETH topo | +-------o---+ | ETH-TE-Link-1 | +---o-------+ | | |---------------------------------| | | | | | | +-----------+ | | +-----------+ | | | TTP-1 __ | | microwave tunnel-11 | | __ TTP-1 | | | | \/@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\/ | | | | * | | | | * | | --Microwave topo | | * | | microwave link 12 | | * | | | | LTP-1 *o ------------------------o* LTP-1 | | | | | | | | | | | +-----------+ | | +-----------+ | | | | | +---------------+ +---------------+ Figure 3: ETH transported on a single microwave radio link In the above ETH topology, the ETH-TE-link is encoded in JSON as below: Ye, et al. Expires September 6, 2018 [Page 9] Internet-Draft Microwave Topology Model March 2018 ... "ietf-network-topology:link": [ { "link-id": "N1,LTP11,N2,LTP21", "source": { "source-node": "N1", "source-tp": "LTP11" } "destination": { "dest-node": "N2", "dest-tp": "LTP21" } } ] "ietf-te-topology:link/te/te-link-attributes/": [ { "enabled": ture, "primary-path":{ "path-element": { "path-element-id": "MW-11" //no backup-path //no protection-type } } "tunnel-termination-points": { "source": "N1/TTP-1", "destination": "N2/TTP-1" } "tunnels" : { "sharing": "false", "tunnel":{ "tunnel-name": "MW-11", "sharing": "false" } } } ] Note that the example above just shows the particular ETH link, not the full ETH topology. In the microwave topology, the microwave link is encoded in JSON as below: Ye, et al. Expires September 6, 2018 [Page 10] Internet-Draft Microwave Topology Model March 2018 ... "ietf-network-topology:link": [ { "link-id": "N1,LTP1,N2,LTP1", "source": { "source-node": "N1", "source-tp": "LTP1" } "destination": { "dest-node": "N2", "dest-tp": "LTP1" } } ] "ietf-te-topology:link/te/te-link-attributes/underlay": [ { "mw-link-frequency": 10728000, "mw-link-channel-separation": "28000", "mw-link-actual-tx-cm":"qam-512", "mw-link-nominal-bandwidth": "1000", "mw-link-current-bandwidth": "1000", "mw-link-availability":{ "mw-link-availability":"0.9999", "mw-link-bandwidth": "1000" } } ] A.2. Appendix A.2 A topology with microwave radio links bundling When a ETH service is transported over two microwave radio links, the topologies could be shown as in Figure 4. Note that the figure just shows one example, there might be other possiblities to demonstrate the topology. Ye, et al. Expires September 6, 2018 [Page 11] Internet-Draft Microwave Topology Model March 2018 Node 1 Node 2 +---------------+ +---------------+ | | | | | +-----------+ | | +-----------+ | | | LTP11 | | | | LTP21 | | --ETH topo | +-------o---+ | ETH-TE-Link-1 | +---o-------+ | | |---------------------------------| | | | | | | +-----------+ | | +-----------+ | | | TTP-1 __ | | microwave tunnel-11 | | __ TTP-1 | | | | \/@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@\/ | | | | * | | | | * | | --Microwave topo | | * | | mw bundled link 33 | | * | | | | LTP-3 *o ------------------------o* LTP-3 | | | | | | | | | | | | LTP-2 o | | o LTP-2 | | | | LTP-1 o | | o LTP-1 | | | +-----------+ | | +-----------+ | | | | | +---------------+ +---------------+ Figure 4: ETH transported on single microwave radio links In the ETH topology, the ETH-TE-link is encoded in JSON as below: Ye, et al. Expires September 6, 2018 [Page 12] Internet-Draft Microwave Topology Model March 2018 ... "ietf-network-topology:link": [ { "link-id": "N1,LTP11,N2,LTP21", "source": { "source-node": "N1", "source-tp": "LTP11" } "destination": { "dest-node": "N2", "dest-tp": "LTP21" } } ] "ietf-te-topology:link/te/te-link-attributes/": [ { "enabled": ture, "primary-path":{ "path-element": { "path-element-id": "MW-33" //no backup-path //no protection-type } } "tunnel-termination-points": { "source": "N1/TTP-1", "destination": "N2/TTP-1" } "tunnels" : { "sharing": "false", "tunnel":{ "tunnel-name": "MW-11", "sharing": "false" } } } ] Note that the example above just shows the specific ETH link, not the full ETH topology. In the microwave topology, the micorwave link is encoded in JSON as below: Ye, et al. Expires September 6, 2018 [Page 13] Internet-Draft Microwave Topology Model March 2018 ... "ietf-network-topology:link": [ { "link-id": "N1,LTP1,N2,LTP1", "source": { "source-node": "N1", "source-tp": "LTP3" } "destination": { "dest-node": "N2", "dest-tp": "LTP3" } } ] "ietf-te-topology:link/te/te-link-config": [ { "bundle-stack-level":{ "component" { "component-links-1": { "sequence": "mw-11", "src-tp-ref": "N1-LTP1", "des-tp-ref" : "N2-LTP1" } "component-links-2": { "sequence": "mw-22", "src-tp-ref": "N1-LTP2" "des-tp-ref" : "N2-LTP2" } } } } ] Note that the example above just shows the microwave component links, it doesn't show the full microwave topology. Appendix B. Contributors Italo Busi Huawei Technologies Email: italo.busi@huawei.com Xufeng Liu Jabil Email: Xufeng_Liu@jabil.com Ye, et al. Expires September 6, 2018 [Page 14] Internet-Draft Microwave Topology Model March 2018 Authors' Addresses Ye Min (editor) Huawei Technologies No.1899, Xiyuan Avenue Chengdu 611731 P.R.China Email: amy.yemin@huawei.com Aihua Guo Huawei Technologies Email: aihuaguo@huawei.comm Jonas Ahlberg Ericsson AB Lindholmspiren 11 Goteborg 417 56 Sweden Email: jonas.ahlberg@ericsson.com Xi Li NEC Laboratories Europe GmbH Kurfuersten-Anlage 36 Heidelberg 69115 Germany Email: Xi.Li@neclab.eu Daniela Spreafico Nokia - IT Via Energy Park, 14 Vimercate (MI) 20871 Italy Email: daniela.spreafico@nokia.com Ye, et al. Expires September 6, 2018 [Page 15]