NETMOD WG I. Farrer Internet-Draft Q. Sun Intended status: Informational S. Zoric Expires: September 14, 2017 Deutsche Telekom AG M. Abrahamsson T-Systems March 13, 2017 YANG Models Required for Managing Residential Gateway (RG) Devices draft-faq-netmod-cpe-yang-profile-01 Abstract This document collects together the set of YANG models necessary for managing NETCONF-enabled Residential Gateway (RG) devices. 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 http://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 14, 2017. Copyright Notice Copyright (c) 2017 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://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. Farrer, et al. Expires September 14, 2017 [Page 1] Internet-Draft RG YANG Device Profile March 2017 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Management Requirements . . . . . . . . . . . . . . . . . . . 3 3.1. General Requirements . . . . . . . . . . . . . . . . . . 3 3.1.1. Requirements . . . . . . . . . . . . . . . . . . . . 4 3.1.2. Development Status of Relevant YANG Models . . . . . 4 3.2. Interfaces . . . . . . . . . . . . . . . . . . . . . . . 4 3.2.1. Requirements . . . . . . . . . . . . . . . . . . . . 4 3.2.2. Development Status of Relevant YANG Models . . . . . 5 3.3. IP Management . . . . . . . . . . . . . . . . . . . . . . 5 3.3.1. Requirements . . . . . . . . . . . . . . . . . . . . 5 3.3.2. Development Status of Relevant YANG Models . . . . . 6 3.4. Routing and Multicast Management . . . . . . . . . . . . 6 3.4.1. Requirements . . . . . . . . . . . . . . . . . . . . 6 3.4.2. Development of Relevant YANG Models . . . . . . . . . 6 3.5. RG NETCONF Server Management . . . . . . . . . . . . . . 7 3.5.1. Requirements . . . . . . . . . . . . . . . . . . . . 7 3.5.2. Development Status of Relevant YANG Models . . . . . 7 3.6. DHCP/SLAAC/ND Management . . . . . . . . . . . . . . . . 7 3.6.1. Requirements . . . . . . . . . . . . . . . . . . . . 7 3.6.2. Development Status of Relevant YANG Models . . . . . 8 3.7. NAT Management . . . . . . . . . . . . . . . . . . . . . 8 3.7.1. Requirements . . . . . . . . . . . . . . . . . . . . 8 3.7.2. Development Status of Relevant YANG Models . . . . . 9 3.8. IPv6 Transition Mechanisms Management . . . . . . . . . . 9 3.8.1. Requirements . . . . . . . . . . . . . . . . . . . . 9 3.8.2. Development of Relevant YANG Models . . . . . . . . . 9 3.9. Management of Specific Services . . . . . . . . . . . . . 10 3.9.1. Requirements . . . . . . . . . . . . . . . . . . . . 10 3.9.2. Development of Relevant YANG Models . . . . . . . . . 10 3.10. Management of Security Components . . . . . . . . . . . . 10 3.10.1. Requirements . . . . . . . . . . . . . . . . . . . . 10 3.10.2. Development of Relevant YANG Models . . . . . . . . 11 3.11. Remote RG Software Upgrade . . . . . . . . . . . . . . . 11 3.11.1. Requirements . . . . . . . . . . . . . . . . . . . . 11 3.11.2. Development of Relevant YANG Models . . . . . . . . 11 4. Security Considerations . . . . . . . . . . . . . . . . . . . 12 5. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 12 6. Acknowledgements . . . . . . . . . . . . . . . . . . . . . . 12 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 12 7.1. Normative References . . . . . . . . . . . . . . . . . . 12 7.2. Informative References . . . . . . . . . . . . . . . . . 15 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 16 Farrer, et al. Expires September 14, 2017 [Page 2] Internet-Draft RG YANG Device Profile March 2017 1. Introduction This document defines the requirements and specifies the necessary YANG models for managing RG devices using NETCONF [RFC6241] and YANG [RFC6020]. Implementing NETCONF on RG devices, along with the relevant YANG models, provides operators with a flexible and extensible management interface. Many of the YANG models referenced here are in various stages in the development process. In some cases there is currently no existing work. The aim of this document is to catalog which models are necessary, and for each referenced YANG model, provide information about the current status of the existing work. It is intended as a 'living document', which will be updated as the required / referenced YANG models progress. Once finalised, the goal of the document is to serve as a RG YANG 'Device profile' that can be used as a reference for operators and implementors who are adding YANG management capabilities to their devices. 2. Terminology RG Residential Gateway; provides access between a customer's LAN connected devices and their ISP's network. In the context of this document, the RG device implements NETCONF/YANG. This document focuses on the type of Residential Gateway that typically exists between the Internet Service Provider access line and residential customer home, performing functions such as those described in [RFC7084]. Existing RFCs Lists YANG models defined in published RFCs. Work In Progress YANG models under development in active Internet Drafts, or relevant documents being produced by SDOs other than the IETF. To Be Defined YANG models that are identified as necessary for RG management, but are not currently known to be in development at the time of writing. 3. Management Requirements 3.1. General Requirements The following requirements are necessary for basic RG hardware management. Farrer, et al. Expires September 14, 2017 [Page 3] Internet-Draft RG YANG Device Profile March 2017 3.1.1. Requirements GEN-1 The RG YANG implementation MUST provide a model for the management of hardware. 3.1.2. Development Status of Relevant YANG Models Existing RFCs: o None Work In Progress: o A YANG Data Model for Hardware Management: [I-D.han-netmod-intf-ext-ppp-yang] To Be Defined (and SDOs that might be responsible for the standards) o None 3.2. Interfaces A RG has a number of network interfaces, usually including some of the following interface types: Ethernet LAN, Ethernet WAN, Ethernet 802.1q, Ethernet 802.1ag, and WLAN (802.11a/b/n/g/ac). [RFC7223] defines a YANG model for general interface management, which identifies these (and other) interface types. NB - The list of interface types necessary for a complete, general HGW model needs to include xDSL (BBF) and DOCSIS (ITU) interfaces. These will be included in a future version of this document. 3.2.1. Requirements The following requirements are necessary for basic RG interface management functionality. INT-1: The RG YANG implementation MUST implement general interface management. INT-2: The RG YANG implementation MUST enable the configuration and management (incl operational information) for the following interface types: o Ethernet LAN o Ethernet 802.1q o Ethernet 802.1ag (including Ethernet CFM) o Ethernet WAN o WLAN (802.11a/b/n/g/ac) Farrer, et al. Expires September 14, 2017 [Page 4] Internet-Draft RG YANG Device Profile March 2017 INT-3: The RG YANG implementation MUST provide support for optical parameter configuration for the Ethernet WAN interface YANG model. INT-4 The RG YANG implementation MUST provide a model for the management of hardware. 3.2.2. Development Status of Relevant YANG Models Existing RFCs: o YANG Data Model for Interface Management [RFC7223]. o IANA Interface Type YANG Module [RFC7224]. Work In Progress: o IEEE 802.1q YANG Model [IEEE-ETH-YANG] o Interface VLAN YANG Data Models: [I-D.ietf-netmod-sub-intf-vlan-model]. o Common Interface Extension YANG Data Models: [I-D.ietf-netmod-intf-ext-yang] o YANG Model for the PPP Protocol: [I-D.han-netmod-intf-ext-ppp-yang] o A YANG Data Model for Hardware Management: [I-D.han-netmod-intf-ext-ppp-yang] To Be Defined (and SDOs that might be responsible for the standards) o Ethernet WAN (IEEE/BBF) o Ethernet 802.1ag (IEEE) o Ethernet LAN (IEEE/BBF) o WLAN (802.11a/b/n/g/ac) (IEEE/WFA/BBF) 3.3. IP Management 3.3.1. Requirements The following requirements are necessary for the management and configuration of IPv4 and IPv6. IP-1: The RG YANG implementation MUST enable the configuration and management of IPv4 addresses and associated parameters on L3 interfaces. IP-2: The RG YANG implementation MUST enable the configuration and management of IPv6 addresses and associated parameters on L3 interfaces. IP-3 The RG YANG implementation MUST allow for the configuration of differentiated services [RFC2474] related parameters on its interfaces. Farrer, et al. Expires September 14, 2017 [Page 5] Internet-Draft RG YANG Device Profile March 2017 3.3.2. Development Status of Relevant YANG Models Existing RFCs: o YANG Data Model for IP Management [RFC7277]. Work In Progress: o YANG Model for DiffServ: [I-D.asechoud-netmod-diffserv-model]. To Be Defined: o None 3.4. Routing and Multicast Management 3.4.1. Requirements The following requirements are necessary for routing management. ROUT-1: The RG YANG implementation MUST provide support for the configuration and management of relevant IPv4/IPv6 dynamic routing protocols (for instance the ones relevant to IETF HOMENET WG). ROUT-2: The RG YANG implementation MUST include YANG models for the management of static IPv4/IPv6 routes. ROUT-3: The RG YANG implementation MUST provide support for the management of Protocol Independent Multicast (PIM). ROUT-4: The RG YANG implementation MUST provide support for the management of static multicast routes. 3.4.2. Development of Relevant YANG Models Existing RFCs: o None Work In Progress: o YANG Data Model for Routing Management: [RFC8022]. o YANG model for static IPv4/IPv6 route: Appendix B in [RFC8022]. o YANG Data Model for ISIS protocol: [I-D.ietf-isis-yang-isis-cfg]. o YANG model for PIM: [I-D.ietf-pim-yang]. o YANG model for IGMP and MLD: [I-D.ietf-pim-igmp-mld-yang]. To Be Defined: o Static Multicast Route Farrer, et al. Expires September 14, 2017 [Page 6] Internet-Draft RG YANG Device Profile March 2017 o What is the HOMENET relevant dynamic routing protocol(s). 3.5. RG NETCONF Server Management 3.5.1. Requirements The following requirements are necessary for management of the RG's NETCONF Server. NETCONF-1: The RG YANG implementation MUST provide support for management and configuration of its local NETCONF server using the NETCONF protocol. NETCONF-2: The RG YANG implementation MUST provide support for the base notification function in order to allow a NETCONF client to retrieve notifications for common system events. NETCONF-3: The RG YANG implementation MUST be able to retrieve NETCONF server configuration automatically during the bootstrap process (ZeroTouch). NETCONF-4: The RG YANG implementation as a NETCONF server MUST provide support for the Call Home function so that a secure connection to a NETCONF client can be initiated. 3.5.2. Development Status of Relevant YANG Models Existing RFCs: o YANG Module for NETCONF Monitoring: [RFC6022]. o NETCONF Base Notifications: [RFC6470]. Work In Progress: o ZeroTouch: [I-D.ietf-netconf-zerotouch]. o NETCONF Call Home: [RFC8071]. o NETCONF Server Configuration Models: [I-D.ietf-netconf-netconf-client-server]. To Be Defined: o None 3.6. DHCP/SLAAC/ND Management 3.6.1. Requirements The following requirements are necessary for management of DHCP, SLAAC and ND. Farrer, et al. Expires September 14, 2017 [Page 7] Internet-Draft RG YANG Device Profile March 2017 V6CONF-1: The RG YANG implementation MUST provide support for management of its DHCPv4 server, which typically runs at the IPv4 LAN side. V6CONF-2: The RG YANG implementation MUST provide support for the management of its DHCPv6 server, which can run at the IPv6 LAN side. V6CONF-3: The RG YANG implementation MUST provide support for the management of its DHCPv6 client, which typically runs at the IPv6 WAN side. V6CONF-4: The RG YANG implementation MUST provide support for the management of its DHCPv6 Prefix Delegation configuration (as a requesting router). V6CONF-5: The RG YANG implementation MUST provide support for the management of SLAAC for stateless IPv6 configuration (as router on its LAN interfaces). 3.6.2. Development Status of Relevant YANG Models Existing RFCs: o IPv6 Router Advertisements: [RFC8022] Work In Progress: o YANG Data Model for DHCPv4 Configuration: [I-D.liu-dhc-dhcp-yang-model]. o YANG Data Model for DHCPv6 Configuration: [I-D.ietf-dhc-dhcpv6-yang]. To Be Defined: o YANG model for SLAAC (Router Advertisement). (IETF) o YANG model for Neighbour Discovery Protocol (NDP). (IETF) o YANG model for DHCPv6 Prefix Delegation (requesting router). (IETF) o YANG model for IPCP. (IETF) o YANG model for IPv6CP. (IETF) 3.7. NAT Management 3.7.1. Requirements The following requirements are necessary for NAT Management. NAT-1: The RG YANG implementation MUST provide support for management of NAT44 configuration, as well as NAPT44 configuration. Farrer, et al. Expires September 14, 2017 [Page 8] Internet-Draft RG YANG Device Profile March 2017 3.7.2. Development Status of Relevant YANG Models Existing RFCs: o None Work In Progress: o YANG Data Model for NAT44 and stateful NAT64 function [I-D.sivakumar-yang-nat]. To Be Defined: o None 3.8. IPv6 Transition Mechanisms Management 3.8.1. Requirements The following requirements are necessary for management of IPv6 Transition Mechanisms. TRAN-2: The RG YANG implementation must include configuration and management for 6rd [RFC5969]. TRAN-2: The RG YANG implementation must include configuration and management for DS-Lite [RFC6333]. TRAN-3: The RG YANG implementation must include configuration and management for Lightweight 4over6 [RFC7596]. TRAN-4: The RG YANG implementation must include configuration and management for MAP-E [RFC7597]. TRAN-5: The RG YANG implementation must include configuration and management for MAP-T [RFC7599]. 3.8.2. Development of Relevant YANG Models Existing RFCs: o None Work In Progress: o YANG model for IPv4-in-IPv6 Softwire: [I-D.ietf-softwire-yang]. o YANG Data Model for the DS-Lite Address Family Transition Router (AFTR): [I-D.ietf-softwire-dslite-yang]. To Be Defined: o YANG model for 6rd. (IETF) Farrer, et al. Expires September 14, 2017 [Page 9] Internet-Draft RG YANG Device Profile March 2017 o DHCP 4o6 client: May be combined in DHCPv6 YANG model as a feature. (IETF) o DNS64. (IETF) o Stateless NAT64 (required for MAP-T and 464xlat). (IETF) 3.9. Management of Specific Services 3.9.1. Requirements The following requirements are necessary for management of specific services which the RG may offer. SERVICE-1: The RG YANG implementation MUST provide support for the management of a SIP client. SERVICE-2: The RG YANG implementation MUST provide support for the management of a the RG Web server (used to provide a local management interface). SERVICE-3: The RG YANG implementation MUST provide support for the management of an NTP client and server. SERVICE-4: The RG YANG implementation MUST provide support for the management of the SSH server. 3.9.2. Development of Relevant YANG Models Existing RFCs: o NTP Client: [RFC7317] Work In Progress: o None To Be Defined: o SIP/VoIP Client. (IETF) o Web server, used by the customer for configuring their RG. (?) o NTP server. (IETF) o SSH server. (IETF) 3.10. Management of Security Components 3.10.1. Requirements The following requirements are necessary for management of security components. SEC-1: The RG YANG implementation MUST provide support for the management of IPv4 firewall and ACL functions. Farrer, et al. Expires September 14, 2017 [Page 10] Internet-Draft RG YANG Device Profile March 2017 SEC-1: The RG YANG implementation MUST provide support for the management of IPv6 firewall and ACL functions. 3.10.2. Development of Relevant YANG Models Existing RFCs: o None Work In Progress: o IPv4 Firewall configuration: [I-D.ietf-netmod-acl-model] o IPv6 Firewall configuration: [I-D.ietf-netmod-acl-model] o Access Control List (ACL): [I-D.ietf-netmod-acl-model] To Be Defined: o IPv4/v6 Firewall (if needed in addition to the above) (IETF?) o Parental controls (?) 3.11. Remote RG Software Upgrade 3.11.1. Requirements The following requirements are necessary to perform remote RG Software file transfer and software upgrades. SWUPG-1: The RG implementation must provide a YANG model for the upgrade of firmware and software packages in order to fix bugs, enable new features, and resolve security issues. SWUPG-2: The RG YANG implementation MUST enable RPCs for file transfer in order to retrieve files from an operator- managed data centre, or upload logging. 3.11.2. Development of Relevant YANG Models Existing RFCs: o None Work In Progress: o File transfer: [I-D.sf-netmod-file-transfer-yang] To Be Defined: o YANG model for firmware upgrade RPCs. (BBF?) Farrer, et al. Expires September 14, 2017 [Page 11] Internet-Draft RG YANG Device Profile March 2017 4. Security Considerations A NETCONF/YANG managed RG should follow the Section 3.10 for enabling and managing IPv4/IPv6 firewalls. Security considerations from the related documents should be followed. 5. IANA Considerations There are no IANA considerations for this document. 6. Acknowledgements The authors would like to thank xxx for their contributions to this work. 7. References 7.1. Normative References [I-D.asechoud-netmod-diffserv-model] Choudhary, A., Shah, S., Jethanandani, M., Liu, B., and N. Strahle, "YANG Model for Diffserv", draft-asechoud-netmod- diffserv-model-03 (work in progress), June 2015. [I-D.han-netmod-intf-ext-ppp-yang] Han, H., Gu, X., Lv, H., and J. Zhang, "Yang Data Model for PPP Protocol", draft-han-netmod-intf-ext-ppp-yang-02 (work in progress), February 2017. [I-D.ietf-dhc-dhcpv6-yang] Cui, Y., Wang, H., Sun, L., Lemon, T., Farrer, I., and S. Zoric, "YANG Data Model for DHCPv6 Configuration", draft- ietf-dhc-dhcpv6-yang-03 (work in progress), June 2016. [I-D.ietf-isis-yang-isis-cfg] Litkowski, S., Yeung, D., Lindem, A., Zhang, Z., and L. Lhotka, "YANG Data Model for IS-IS protocol", draft-ietf- isis-yang-isis-cfg-15 (work in progress), February 2017. [I-D.ietf-netconf-call-home] Watsen, K., "NETCONF Call Home and RESTCONF Call Home", draft-ietf-netconf-call-home-17 (work in progress), December 2015. [I-D.ietf-netconf-netconf-client-server] Watsen, K., Wu, G., and J. Schoenwaelder, "NETCONF Client and Server Models", draft-ietf-netconf-netconf-client- server-01 (work in progress), November 2016. Farrer, et al. Expires September 14, 2017 [Page 12] Internet-Draft RG YANG Device Profile March 2017 [I-D.ietf-netconf-server-model] Watsen, K. and J. Schoenwaelder, "NETCONF Server and RESTCONF Server Configuration Models", draft-ietf-netconf- server-model-09 (work in progress), March 2016. [I-D.ietf-netconf-zerotouch] Watsen, K. and M. Abrahamsson, "Zero Touch Provisioning for NETCONF or RESTCONF based Management", draft-ietf- netconf-zerotouch-12 (work in progress), January 2017. [I-D.ietf-netmod-acl-model] Bogdanovic, D., Koushik, K., Huang, L., and D. Blair, "Network Access Control List (ACL) YANG Data Model", draft-ietf-netmod-acl-model-10 (work in progress), March 2017. [I-D.ietf-netmod-intf-ext-yang] Wilton, R., Ball, D., tsingh@juniper.net, t., and S. Sivaraj, "Common Interface Extension YANG Data Models", draft-ietf-netmod-intf-ext-yang-04 (work in progress), March 2017. [I-D.ietf-netmod-sub-intf-vlan-model] Wilton, R., Ball, D., tapsingh@cisco.com, t., and S. Sivaraj, "Sub-interface VLAN YANG Data Models", draft- ietf-netmod-sub-intf-vlan-model-00 (work in progress), February 2017. [I-D.ietf-pim-igmp-mld-yang] Liu, X., Guo, F., Sivakumar, M., McAllister, P., and A. Peter, "A YANG data model for Internet Group Management Protocol (IGMP) and Multicast Listener Discovery (MLD)", draft-ietf-pim-igmp-mld-yang-03 (work in progress), March 2017. [I-D.ietf-pim-yang] Liu, X., McAllister, P., Peter, A., Sivakumar, M., Liu, Y., and f. hu, "A YANG data model for Protocol-Independent Multicast (PIM)", draft-ietf-pim-yang-07 (work in progress), March 2017. [I-D.ietf-softwire-dslite-yang] Boucadair, M., Jacquenet, C., and S. Sivakumar, "A YANG Data Model for the DS-Lite", draft-ietf-softwire-dslite- yang-02 (work in progress), January 2017. Farrer, et al. Expires September 14, 2017 [Page 13] Internet-Draft RG YANG Device Profile March 2017 [I-D.ietf-softwire-yang] Sun, Q., Wang, H., Cui, Y., Farrer, I., Zoric, S., Boucadair, M., and R. Asati, "A YANG Data Model for IPv4- in-IPv6 Softwires", draft-ietf-softwire-yang-01 (work in progress), October 2016. [I-D.liu-dhc-dhcp-yang-model] Liu, B., Lou, K., and C. Chen, "Yang Data Model for DHCP Protocol", draft-liu-dhc-dhcp-yang-model-06 (work in progress), March 2017. [I-D.sf-netmod-file-transfer-yang] Sun, Q. and I. Farrer, "A YANG Data Model for Transferring Files", draft-sf-netmod-file-transfer-yang-00 (work in progress), March 2015. [I-D.sivakumar-yang-nat] Sivakumar, S., Boucadair, M., and S. <>, "YANG Data Model for Network Address Translation (NAT)", draft-sivakumar- yang-nat-05 (work in progress), September 2016. [IEEE-ETH-YANG] "IEEE 802.1q YANG Model", . [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, DOI 10.17487/RFC2119, March 1997, . [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, . [RFC6022] Scott, M. and M. Bjorklund, "YANG Module for NETCONF Monitoring", RFC 6022, DOI 10.17487/RFC6022, 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, . [RFC6470] Bierman, A., "Network Configuration Protocol (NETCONF) Base Notifications", RFC 6470, DOI 10.17487/RFC6470, February 2012, . Farrer, et al. Expires September 14, 2017 [Page 14] Internet-Draft RG YANG Device Profile March 2017 [RFC7223] Bjorklund, M., "A YANG Data Model for Interface Management", RFC 7223, DOI 10.17487/RFC7223, May 2014, . [RFC7224] Bjorklund, M., "IANA Interface Type YANG Module", RFC 7224, DOI 10.17487/RFC7224, May 2014, . [RFC7277] Bjorklund, M., "A YANG Data Model for IP Management", RFC 7277, DOI 10.17487/RFC7277, June 2014, . [RFC7317] Bierman, A. and M. Bjorklund, "A YANG Data Model for System Management", RFC 7317, DOI 10.17487/RFC7317, August 2014, . [RFC7659] Perreault, S., Tsou, T., Sivakumar, S., and T. Taylor, "Definitions of Managed Objects for Network Address Translators (NATs)", RFC 7659, DOI 10.17487/RFC7659, October 2015, . [RFC8022] Lhotka, L. and A. Lindem, "A YANG Data Model for Routing Management", RFC 8022, DOI 10.17487/RFC8022, November 2016, . [RFC8071] Watsen, K., "NETCONF Call Home and RESTCONF Call Home", RFC 8071, DOI 10.17487/RFC8071, February 2017, . 7.2. Informative References [RFC2474] Nichols, K., Blake, S., Baker, F., and D. Black, "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers", RFC 2474, DOI 10.17487/RFC2474, December 1998, . [RFC5969] Townsley, W. and O. Troan, "IPv6 Rapid Deployment on IPv4 Infrastructures (6rd) -- Protocol Specification", RFC 5969, DOI 10.17487/RFC5969, August 2010, . [RFC6333] Durand, A., Droms, R., Woodyatt, J., and Y. Lee, "Dual- Stack Lite Broadband Deployments Following IPv4 Exhaustion", RFC 6333, DOI 10.17487/RFC6333, August 2011, . Farrer, et al. Expires September 14, 2017 [Page 15] Internet-Draft RG YANG Device Profile March 2017 [RFC7084] Singh, H., Beebee, W., Donley, C., and B. Stark, "Basic Requirements for IPv6 Customer Edge Routers", RFC 7084, DOI 10.17487/RFC7084, November 2013, . [RFC7596] Cui, Y., Sun, Q., Boucadair, M., Tsou, T., Lee, Y., and I. Farrer, "Lightweight 4over6: An Extension to the Dual- Stack Lite Architecture", RFC 7596, DOI 10.17487/RFC7596, July 2015, . [RFC7597] Troan, O., Ed., Dec, W., Li, X., Bao, C., Matsushima, S., Murakami, T., and T. Taylor, Ed., "Mapping of Address and Port with Encapsulation (MAP-E)", RFC 7597, DOI 10.17487/RFC7597, July 2015, . [RFC7599] Li, X., Bao, C., Dec, W., Ed., Troan, O., Matsushima, S., and T. Murakami, "Mapping of Address and Port using Translation (MAP-T)", RFC 7599, DOI 10.17487/RFC7599, July 2015, . Authors' Addresses Ian Farrer Deutsche Telekom AG CTO-ATI, Landgrabenweg 151 Bonn, NRW 53227 Germany Email: ian.farrer@telekom.de Qi Sun Deutsche Telekom AG CTO-ATI, Landgrabenweg 151 Bonn, NRW 53227 Germany Email: sunqi.ietf@gmail.com Sladjana Zoric Deutsche Telekom AG CTO-ATI, Landgrabenweg 151 Bonn, NRW 53227 Germany Email: sladjana.zoric@telekom.de Farrer, et al. Expires September 14, 2017 [Page 16] Internet-Draft RG YANG Device Profile March 2017 Mikael Abrahamsson T-Systems Email: mikael.abrahamsson@t-systems.se Farrer, et al. Expires September 14, 2017 [Page 17]