NETCONF Working Group K. Watsen Internet-Draft Watsen Networks Intended status: Standards Track June 7, 2019 Expires: December 9, 2019 NETCONF Client and Server Models draft-ietf-netconf-netconf-client-server-13 Abstract This document defines two YANG modules, one module to configure a NETCONF client and the other module to configure a NETCONF server. Both modules support both the SSH and TLS transport protocols, and support both standard NETCONF and NETCONF Call Home connections. Editorial Note (To be removed by RFC Editor) This draft contains many placeholder values that need to be replaced with finalized values at the time of publication. This note summarizes all of the substitutions that are needed. No other RFC Editor instructions are specified elsewhere in this document. This document contains references to other drafts in progress, both in the Normative References section, as well as in body text throughout. Please update the following references to reflect their final RFC assignments: o I-D.ietf-netconf-keystore o I-D.ietf-netconf-tcp-client-server o I-D.ietf-netconf-ssh-client-server o I-D.ietf-netconf-tls-client-server Artwork in this document contains shorthand references to drafts in progress. Please apply the following replacements: o "XXXX" --> the assigned RFC value for this draft o "AAAA" --> the assigned RFC value for I-D.ietf-netconf-tcp-client- server o "YYYY" --> the assigned RFC value for I-D.ietf-netconf-ssh-client- server Watsen Expires December 9, 2019 [Page 1] Internet-Draft NETCONF Client and Server Models June 2019 o "ZZZZ" --> the assigned RFC value for I-D.ietf-netconf-tls-client- server Artwork in this document contains placeholder values for the date of publication of this draft. Please apply the following replacement: o "2019-06-07" --> the publication date of this draft The following Appendix section is to be removed prior to publication: o Appendix B. Change Log 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 December 9, 2019. Copyright Notice Copyright (c) 2019 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (https://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include 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. Watsen Expires December 9, 2019 [Page 2] Internet-Draft NETCONF Client and Server Models June 2019 Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3 2. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 4 3. The NETCONF Client Model . . . . . . . . . . . . . . . . . . 4 3.1. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . 4 3.2. Example Usage . . . . . . . . . . . . . . . . . . . . . . 5 3.3. YANG Module . . . . . . . . . . . . . . . . . . . . . . . 8 4. The NETCONF Server Model . . . . . . . . . . . . . . . . . . 18 4.1. Tree Diagram . . . . . . . . . . . . . . . . . . . . . . 18 4.2. Example Usage . . . . . . . . . . . . . . . . . . . . . . 20 4.3. YANG Module . . . . . . . . . . . . . . . . . . . . . . . 25 5. Security Considerations . . . . . . . . . . . . . . . . . . . 37 6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 38 6.1. The IETF XML Registry . . . . . . . . . . . . . . . . . . 38 6.2. The YANG Module Names Registry . . . . . . . . . . . . . 38 7. References . . . . . . . . . . . . . . . . . . . . . . . . . 38 7.1. Normative References . . . . . . . . . . . . . . . . . . 38 7.2. Informative References . . . . . . . . . . . . . . . . . 40 Appendix A. Expanded Tree Diagrams . . . . . . . . . . . . . . . 41 A.1. Expanded Tree Diagram for 'ietf-netconf-client' . . . . . 41 A.2. Expanded Tree Diagram for 'ietf-netconf-server' . . . . . 49 Appendix B. Change Log . . . . . . . . . . . . . . . . . . . . . 59 B.1. 00 to 01 . . . . . . . . . . . . . . . . . . . . . . . . 59 B.2. 01 to 02 . . . . . . . . . . . . . . . . . . . . . . . . 59 B.3. 02 to 03 . . . . . . . . . . . . . . . . . . . . . . . . 59 B.4. 03 to 04 . . . . . . . . . . . . . . . . . . . . . . . . 60 B.5. 04 to 05 . . . . . . . . . . . . . . . . . . . . . . . . 60 B.6. 05 to 06 . . . . . . . . . . . . . . . . . . . . . . . . 60 B.7. 06 to 07 . . . . . . . . . . . . . . . . . . . . . . . . 60 B.8. 07 to 08 . . . . . . . . . . . . . . . . . . . . . . . . 61 B.9. 08 to 09 . . . . . . . . . . . . . . . . . . . . . . . . 61 B.10. 09 to 10 . . . . . . . . . . . . . . . . . . . . . . . . 61 B.11. 10 to 11 . . . . . . . . . . . . . . . . . . . . . . . . 61 B.12. 11 to 12 . . . . . . . . . . . . . . . . . . . . . . . . 61 B.13. 12 to 13 . . . . . . . . . . . . . . . . . . . . . . . . 62 Acknowledgements . . . . . . . . . . . . . . . . . . . . . . . . 62 Author's Address . . . . . . . . . . . . . . . . . . . . . . . . 62 1. Introduction This document defines two YANG [RFC7950] modules, one module to configure a NETCONF [RFC6241] client and the other module to configure a NETCONF server. Both modules support both NETCONF over SSH [RFC6242] and NETCONF over TLS [RFC7589] and NETCONF Call Home connections [RFC8071]. Watsen Expires December 9, 2019 [Page 3] Internet-Draft NETCONF Client and Server Models June 2019 2. Terminology 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 [RFC2119] [RFC8174] when, and only when, they appear in all capitals, as shown here. 3. The NETCONF Client Model The NETCONF client model presented in this section supports both clients initiating connections to servers, as well as clients listening for connections from servers calling home, using either the SSH and TLS transport protocols. YANG feature statements are used to enable implementations to advertise which potentially uncommon parts of the model the NETCONF client supports. 3.1. Tree Diagram The following tree diagram [RFC8340] provides an overview of the data model for the "ietf-netconf-client" module. This tree diagram only shows the nodes defined in this module; it does show the nodes defined by "grouping" statements used by this module. Please see Appendix A.1 for a tree diagram that illustrates what the module looks like with all the "grouping" statements expanded. module: ietf-netconf-client +--rw netconf-client +---u netconf-client-grouping grouping netconf-client-grouping +-- initiate! {ssh-initiate or tls-initiate}? | +-- netconf-server* [name] | +-- name? string | +-- endpoints | | +-- endpoint* [name] | | +-- name? string | | +-- (transport) | | +--:(ssh) {ssh-initiate}? | | | +-- ssh | | | +-- tcp-client-parameters | | | | +---u tcpc:tcp-client-grouping | | | +-- ssh-client-parameters Watsen Expires December 9, 2019 [Page 4] Internet-Draft NETCONF Client and Server Models June 2019 | | | +---u sshc:ssh-client-grouping | | +--:(tls) {tls-initiate}? | | +-- tls | | +-- tcp-client-parameters | | | +---u tcpc:tcp-client-grouping | | +-- tls-client-parameters | | +---u tlsc:tls-client-grouping | +-- connection-type | | +-- (connection-type) | | +--:(persistent-connection) | | | +-- persistent! | | +--:(periodic-connection) | | +-- periodic! | | +-- period? uint16 | | +-- anchor-time? yang:date-and-time | | +-- idle-timeout? uint16 | +-- reconnect-strategy | +-- start-with? enumeration | +-- max-attempts? uint8 +-- listen! {ssh-listen or tls-listen}? +-- idle-timeout? uint16 +-- endpoint* [name] +-- name? string +-- (transport) +--:(ssh) {ssh-listen}? | +-- ssh | +-- tcp-server-parameters | | +---u tcps:tcp-server-grouping | +-- ssh-client-parameters | +---u sshc:ssh-client-grouping +--:(tls) {tls-listen}? +-- tls +-- tcp-server-parameters | +---u tcps:tcp-server-grouping +-- tls-client-parameters +---u tlsc:tls-client-grouping 3.2. Example Usage The following example illustrates configuring a NETCONF client to initiate connections, using both the SSH and TLS transport protocols, as well as listening for call-home connections, again using both the SSH and TLS transport protocols. This example is consistent with the examples presented in Section 2 of [I-D.ietf-netconf-trust-anchors] and Section 3.2 of [I-D.ietf-netconf-keystore]. Watsen Expires December 9, 2019 [Page 5] Internet-Draft NETCONF Client and Server Models June 2019 =========== NOTE: '\' line wrapping per BCP XX (RFC XXXX) =========== corp-fw1 corp-fw1.example.com corp-fw1.example.com 15 3 30 foobar ct:rsa2048 base64encodedvalue== base64encodedvalue== explicitly-trusted-server-ca-certs explicitly-trusted-server-certs 30 3 corp-fw2.example.com Watsen Expires December 9, 2019 [Page 6] Internet-Draft NETCONF Client and Server Models June 2019 corp-fw2.example.com 15 3 30 foobar ct:rsa2048 base64encodedvalue== base64encodedvalue== explicitly-trusted-server-ca-certs explicitly-trusted-server-certs 30 3 last-connected Intranet-facing listener Watsen Expires December 9, 2019 [Page 7] Internet-Draft NETCONF Client and Server Models June 2019 192.0.2.7 foobar ct:rsa2048 base64encodedvalue== base64encodedvalue== explicitly-trusted-server-ca-certs explicitly-trusted-server-certs explicitly-trusted-ssh-host-keys 3.3. YANG Module This YANG module has normative references to [RFC6242], [RFC6991], [RFC7589], [RFC8071], [I-D.kwatsen-netconf-tcp-client-server], [I-D.ietf-netconf-ssh-client-server], and [I-D.ietf-netconf-tls-client-server]. file "ietf-netconf-client@2019-06-07.yang" module ietf-netconf-client { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-netconf-client"; prefix ncc; import ietf-yang-types { prefix yang; reference "RFC 6991: Common YANG Data Types"; } Watsen Expires December 9, 2019 [Page 8] Internet-Draft NETCONF Client and Server Models June 2019 import ietf-tcp-client { prefix tcpc; reference "RFC AAAA: YANG Groupings for TCP Clients and TCP Servers"; } import ietf-tcp-server { prefix tcps; reference "RFC AAAA: YANG Groupings for TCP Clients and TCP Servers"; } import ietf-ssh-client { prefix sshc; revision-date 2019-06-07; // stable grouping definitions reference "RFC BBBB: YANG Groupings for SSH Clients and SSH Servers"; } import ietf-tls-client { prefix tlsc; revision-date 2019-06-07; // stable grouping definitions reference "RFC CCCC: YANG Groupings for TLS Clients and TLS Servers"; } organization "IETF NETCONF (Network Configuration) Working Group"; contact "WG Web: WG List: Author: Kent Watsen Author: Gary Wu "; description "This module contains a collection of YANG definitions for configuring NETCONF clients. Copyright (c) 2019 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). Watsen Expires December 9, 2019 [Page 9] Internet-Draft NETCONF Client and Server Models June 2019 This version of this YANG module is part of RFC XXXX (https://www.rfc-editor.org/info/rfcXXXX); 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 2019-06-07 { description "Initial version"; reference "RFC XXXX: NETCONF Client and Server Models"; } // Features feature ssh-initiate { description "The 'ssh-initiate' feature indicates that the NETCONF client supports initiating SSH connections to NETCONF servers."; reference "RFC 6242: Using the NETCONF Protocol over Secure Shell (SSH)"; } feature tls-initiate { description "The 'tls-initiate' feature indicates that the NETCONF client supports initiating TLS connections to NETCONF servers."; reference "RFC 7589: Using the NETCONF Protocol over Transport Layer Security (TLS) with Mutual X.509 Authentication"; } feature ssh-listen { description "The 'ssh-listen' feature indicates that the NETCONF client supports opening a port to listen for incoming NETCONF server call-home SSH connections."; reference "RFC 8071: NETCONF Call Home and RESTCONF Call Home"; } feature tls-listen { Watsen Expires December 9, 2019 [Page 10] Internet-Draft NETCONF Client and Server Models June 2019 description "The 'tls-listen' feature indicates that the NETCONF client supports opening a port to listen for incoming NETCONF server call-home TLS connections."; reference "RFC 8071: NETCONF Call Home and RESTCONF Call Home"; } // Groupings grouping netconf-client-grouping { description "Top-level grouping for NETCONF client configuration."; container initiate { if-feature "ssh-initiate or tls-initiate"; presence "Enables client to initiate TCP connections"; description "Configures client initiating underlying TCP connections."; list netconf-server { key "name"; min-elements 1; description "List of NETCONF servers the NETCONF client is to initiate connections to in parallel."; leaf name { type string; description "An arbitrary name for the NETCONF server."; } container endpoints { description "Container for the list of endpoints."; list endpoint { key "name"; min-elements 1; ordered-by user; description "A user-ordered list of endpoints that the NETCONF client will attempt to connect to in the specified sequence. Defining more than one enables high-availability."; leaf name { type string; description "An arbitrary name for the endpoint."; } choice transport { mandatory true; Watsen Expires December 9, 2019 [Page 11] Internet-Draft NETCONF Client and Server Models June 2019 description "Selects between available transports."; case ssh { if-feature "ssh-initiate"; container ssh { description "Specifies IP and SSH specific configuration for the connection."; container tcp-client-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcpc:tcp-client-grouping { refine "remote-port" { default "830"; description "The NETCONF client will attempt to connect to the IANA-assigned well-known port value for 'netconf-ssh' (443) if no value is specified."; } } } container ssh-client-parameters { description "A wrapper around the SSH client parameters to avoid name collisions."; uses sshc:ssh-client-grouping; } } } case tls { if-feature "tls-initiate"; container tls { description "Specifies IP and TLS specific configuration for the connection."; container tcp-client-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcpc:tcp-client-grouping { refine "remote-port" { default "6513"; description "The NETCONF client will attempt to connect to the IANA-assigned well-known port value for 'netconf-tls' (6513) if no value is Watsen Expires December 9, 2019 [Page 12] Internet-Draft NETCONF Client and Server Models June 2019 specified."; } } } container tls-client-parameters { description "A wrapper around the TLS client parameters to avoid name collisions."; uses tlsc:tls-client-grouping { refine "client-identity" + "/auth-type" { mandatory true; description "NETCONF/TLS clients MUST pass some authentication credentials."; } } } } } } // choice transport } // list endpoint } // container endpoints container connection-type { description "Indicates the NETCONF client's preference for how the NETCONF connection is maintained."; choice connection-type { mandatory true; description "Selects between available connection types."; case persistent-connection { container persistent { presence "Indicates that a persistent connection is to be maintained."; description "Maintain a persistent connection to the NETCONF server. If the connection goes down, immediately start trying to reconnect to the NETCONF server, using the reconnection strategy. This connection type minimizes any NETCONF server to NETCONF client data-transfer delay, albeit at the expense of holding resources longer."; } } case periodic-connection { Watsen Expires December 9, 2019 [Page 13] Internet-Draft NETCONF Client and Server Models June 2019 container periodic { presence "Indicates that a periodic connection is to be maintained."; description "Periodically connect to the NETCONF server. This connection type increases resource utilization, albeit with increased delay in NETCONF server to NETCONF client interactions. The NETCONF client should close the underlying TCP connection upon completing planned activities. In the case that the previous connection is still active, establishing a new connection is NOT RECOMMENDED."; leaf period { type uint16; units "minutes"; default "60"; description "Duration of time between periodic connections."; } leaf anchor-time { type yang:date-and-time { // constrained to minute-level granularity pattern '\d{4}-\d{2}-\d{2}T\d{2}:\d{2}' + '(Z|[\+\-]\d{2}:\d{2})'; } description "Designates a timestamp before or after which a series of periodic connections are determined. The periodic connections occur at a whole multiple interval from the anchor time. For example, for an anchor time is 15 minutes past midnight and a period interval of 24 hours, then a periodic connection will occur 15 minutes past midnight everyday."; } leaf idle-timeout { type uint16; units "seconds"; default 120; // two minutes description "Specifies the maximum number of seconds that a NETCONF session may remain idle. A NETCONF session will be dropped if it is idle for an interval longer then this number of seconds. Watsen Expires December 9, 2019 [Page 14] Internet-Draft NETCONF Client and Server Models June 2019 If set to zero, then the NETCONF client will never drop a session because it is idle."; } } } } } container reconnect-strategy { description "The reconnection strategy directs how a NETCONF client reconnects to a NETCONF server, after discovering its connection to the server has dropped, even if due to a reboot. The NETCONF client starts with the specified endpoint and tries to connect to it max-attempts times before trying the next endpoint in the list (round robin)."; leaf start-with { type enumeration { enum first-listed { description "Indicates that reconnections should start with the first endpoint listed."; } enum last-connected { description "Indicates that reconnections should start with the endpoint last connected to. If no previous connection has ever been established, then the first endpoint configured is used. NETCONF clients SHOULD be able to remember the last endpoint connected to across reboots."; } enum random-selection { description "Indicates that reconnections should start with a random endpoint."; } } default "first-listed"; description "Specifies which of the NETCONF server's endpoints the NETCONF client should start with when trying to connect to the NETCONF server."; } leaf max-attempts { type uint8 { range "1..max"; } Watsen Expires December 9, 2019 [Page 15] Internet-Draft NETCONF Client and Server Models June 2019 default "3"; description "Specifies the number times the NETCONF client tries to connect to a specific endpoint before moving on to the next endpoint in the list (round robin)."; } } } // netconf-server } // initiate container listen { if-feature "ssh-listen or tls-listen"; presence "Enables client to accept call-home connections"; description "Configures client accepting call-home TCP connections."; leaf idle-timeout { type uint16; units "seconds"; default "3600"; // one hour description "Specifies the maximum number of seconds that a NETCONF session may remain idle. A NETCONF session will be dropped if it is idle for an interval longer than this number of seconds. If set to zero, then the server will never drop a session because it is idle. Sessions that have a notification subscription active are never dropped."; } list endpoint { key "name"; min-elements 1; description "List of endpoints to listen for NETCONF connections."; leaf name { type string; description "An arbitrary name for the NETCONF listen endpoint."; } choice transport { mandatory true; description "Selects between available transports."; case ssh { if-feature "ssh-listen"; container ssh { description "SSH-specific listening configuration for inbound connections."; Watsen Expires December 9, 2019 [Page 16] Internet-Draft NETCONF Client and Server Models June 2019 container tcp-server-parameters { description "A wrapper around the TCP server parameters to avoid name collisions."; uses tcps:tcp-server-grouping { refine "local-port" { default "4334"; description "The NETCONF client will listen on the IANA- assigned well-known port for 'netconf-ch-ssh' (4334) if no value is specified."; } } } container ssh-client-parameters { description "A wrapper around the SSH client parameters to avoid name collisions."; uses sshc:ssh-client-grouping; } } } case tls { if-feature "tls-listen"; container tls { description "TLS-specific listening configuration for inbound connections."; container tcp-server-parameters { description "A wrapper around the TCP server parameters to avoid name collisions."; uses tcps:tcp-server-grouping { refine "local-port" { default "4334"; description "The NETCONF client will listen on the IANA- assigned well-known port for 'netconf-ch-ssh' (4334) if no value is specified."; } } } container tls-client-parameters { description "A wrapper around the TLS client parameters to avoid name collisions."; uses tlsc:tls-client-grouping { refine "client-identity/auth-type" { Watsen Expires December 9, 2019 [Page 17] Internet-Draft NETCONF Client and Server Models June 2019 mandatory true; description "NETCONF/TLS clients MUST pass some authentication credentials."; } } } } } } // transport } // endpoint } // listen } // netconf-client // Protocol accessible node, for servers that implement this // module. container netconf-client { uses netconf-client-grouping; description "Top-level container for NETCONF client configuration."; } } 4. The NETCONF Server Model The NETCONF server model presented in this section supports both listening for connections as well as initiating call-home connections, using either the SSH and TLS transport protocols. YANG feature statements are used to enable implementations to advertise which potentially uncommon parts of the model the NETCONF server supports. 4.1. Tree Diagram The following tree diagram [RFC8340] provides an overview of the data model for the "ietf-netconf-server" module. This tree diagram only shows the nodes defined in this module; it does show the nodes defined by "grouping" statements used by this module. Please see Appendix A.2 for a tree diagram that illustrates what the module looks like with all the "grouping" statements expanded. module: ietf-netconf-server Watsen Expires December 9, 2019 [Page 18] Internet-Draft NETCONF Client and Server Models June 2019 +--rw netconf-server +---u netconf-server-grouping grouping netconf-server-grouping +-- listen! {ssh-listen or tls-listen}? | +-- idle-timeout? uint16 | +-- endpoint* [name] | +-- name? string | +-- (transport) | +--:(ssh) {ssh-listen}? | | +-- ssh | | +-- tcp-server-parameters | | | +---u tcps:tcp-server-grouping | | +-- ssh-server-parameters | | +---u sshs:ssh-server-grouping | +--:(tls) {tls-listen}? | +-- tls | +-- tcp-server-parameters | | +---u tcps:tcp-server-grouping | +-- tls-server-parameters | +---u tlss:tls-server-grouping +-- call-home! {ssh-call-home or tls-call-home}? +-- netconf-client* [name] +-- name? string +-- endpoints | +-- endpoint* [name] | +-- name? string | +-- (transport) | +--:(ssh) {ssh-call-home}? | | +-- ssh | | +-- tcp-client-parameters | | | +---u tcpc:tcp-client-grouping | | +-- ssh-server-parameters | | +---u sshs:ssh-server-grouping | +--:(tls) {tls-call-home}? | +-- tls | +-- tcp-client-parameters | | +---u tcpc:tcp-client-grouping | +-- tls-server-parameters | +---u tlss:tls-server-grouping +-- connection-type | +-- (connection-type) | +--:(persistent-connection) | | +-- persistent! | +--:(periodic-connection) | +-- periodic! | +-- period? uint16 | +-- anchor-time? yang:date-and-time Watsen Expires December 9, 2019 [Page 19] Internet-Draft NETCONF Client and Server Models June 2019 | +-- idle-timeout? uint16 +-- reconnect-strategy +-- start-with? enumeration +-- max-attempts? uint8 4.2. Example Usage The following example illustrates configuring a NETCONF server to listen for NETCONF client connections using both the SSH and TLS transport protocols, as well as configuring call-home to two NETCONF clients, one using SSH and the other using TLS. This example is consistent with the examples presented in Section 2 of [I-D.ietf-netconf-trust-anchors] and Section 3.2 of [I-D.ietf-netconf-keystore]. =========== NOTE: '\' line wrapping per BCP XX (RFC XXXX) =========== netconf/ssh 192.0.2.7 deployment-specific-certificate ct:rsa2048 base64encodedvalue== base64encodedvalue== Watsen Expires December 9, 2019 [Page 20] Internet-Draft NETCONF Client and Server Models June 2019 netconf/tls 192.0.2.7 ct:rsa2048 base64encodedvalue== base64encodedvalue== base64encodedvalue== explicitly-trusted-client-ca-certs explicitly-trusted-client-certs 1 11:0A:05:11:00 x509c2n:san-any 2 B3:4F:A1:8C:54 x509c2n:specified scooby-doo Watsen Expires December 9, 2019 [Page 21] Internet-Draft NETCONF Client and Server Models June 2019 config-mgr east-data-center east.config-mgr.example.com deployment-specific-certificate ct:rsa2048 base64encodedvalue== base64encodedvalue== west-data-center west.config-mgr.example.com deployment-specific-certificate ct:rsa2048 base64encodedvalue== Watsen Expires December 9, 2019 [Page 22] Internet-Draft NETCONF Client and Server Models June 2019 base64encodedvalue== 300 60 last-connected 3 data-collector east-data-center east.analytics.example.com 15 3 30 ct:rsa2048 base64encodedvalue== base64encodedvalue== Watsen Expires December 9, 2019 [Page 23] Internet-Draft NETCONF Client and Server Models June 2019 base64encodedvalue== explicitly-trusted-client-ca-certs explicitly-trusted-client-certs 1 11:0A:05:11:00 x509c2n:san-any 2 B3:4F:A1:8C:54 x509c2n:specified scooby-doo 30 3 west-data-center west.analytics.example.com 15 3 30 ct:rsa2048 base64encodedvalue== Watsen Expires December 9, 2019 [Page 24] Internet-Draft NETCONF Client and Server Models June 2019 base64encodedvalue== base64encodedvalue== explicitly-trusted-client-ca-certs explicitly-trusted-client-certs 1 11:0A:05:11:00 x509c2n:san-any 2 B3:4F:A1:8C:54 x509c2n:specified scooby-doo 30 3 first-listed 3 4.3. YANG Module This YANG module has normative references to [RFC6242], [RFC6991], [RFC7407], [RFC7589], [RFC8071], [I-D.kwatsen-netconf-tcp-client-server], Watsen Expires December 9, 2019 [Page 25] Internet-Draft NETCONF Client and Server Models June 2019 [I-D.ietf-netconf-ssh-client-server], and [I-D.ietf-netconf-tls-client-server]. file "ietf-netconf-server@2019-06-07.yang" module ietf-netconf-server { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-netconf-server"; prefix ncs; import ietf-yang-types { prefix yang; reference "RFC 6991: Common YANG Data Types"; } import ietf-x509-cert-to-name { prefix x509c2n; reference "RFC 7407: A YANG Data Model for SNMP Configuration"; } import ietf-tcp-client { prefix tcpc; reference "RFC AAAA: YANG Groupings for TCP Clients and TCP Servers"; } import ietf-tcp-server { prefix tcps; reference "RFC AAAA: YANG Groupings for TCP Clients and TCP Servers"; } import ietf-ssh-server { prefix sshs; revision-date 2019-06-07; // stable grouping definitions reference "RFC BBBB: YANG Groupings for SSH Clients and SSH Servers"; } import ietf-tls-server { prefix tlss; revision-date 2019-06-07; // stable grouping definitions reference "RFC CCCC: YANG Groupings for TLS Clients and TLS Servers"; } organization Watsen Expires December 9, 2019 [Page 26] Internet-Draft NETCONF Client and Server Models June 2019 "IETF NETCONF (Network Configuration) Working Group"; contact "WG Web: WG List: Author: Kent Watsen Author: Gary Wu Author: Juergen Schoenwaelder "; description "This module contains a collection of YANG definitions for configuring NETCONF servers. Copyright (c) 2019 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 (https://www.rfc-editor.org/info/rfcXXXX); 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 2019-06-07 { description "Initial version"; reference "RFC XXXX: NETCONF Client and Server Models"; } // Features feature ssh-listen { description "The 'ssh-listen' feature indicates that the NETCONF server supports opening a port to accept NETCONF over SSH client connections."; Watsen Expires December 9, 2019 [Page 27] Internet-Draft NETCONF Client and Server Models June 2019 reference "RFC 6242: Using the NETCONF Protocol over Secure Shell (SSH)"; } feature tls-listen { description "The 'tls-listen' feature indicates that the NETCONF server supports opening a port to accept NETCONF over TLS client connections."; reference "RFC 7589: Using the NETCONF Protocol over Transport Layer Security (TLS) with Mutual X.509 Authentication"; } feature ssh-call-home { description "The 'ssh-call-home' feature indicates that the NETCONF server supports initiating a NETCONF over SSH call home connection to NETCONF clients."; reference "RFC 8071: NETCONF Call Home and RESTCONF Call Home"; } feature tls-call-home { description "The 'tls-call-home' feature indicates that the NETCONF server supports initiating a NETCONF over TLS call home connection to NETCONF clients."; reference "RFC 8071: NETCONF Call Home and RESTCONF Call Home"; } // Groupings grouping netconf-server-grouping { description "Top-level grouping for NETCONF server configuration."; container listen { if-feature "ssh-listen or tls-listen"; presence "Enables server to listen for NETCONF client connections."; description "Configures listen behavior"; leaf idle-timeout { type uint16; units "seconds"; Watsen Expires December 9, 2019 [Page 28] Internet-Draft NETCONF Client and Server Models June 2019 default 3600; // one hour description "Specifies the maximum number of seconds that a NETCONF session may remain idle. A NETCONF session will be dropped if it is idle for an interval longer than this number of seconds. If set to zero, then the server will never drop a session because it is idle. Sessions that have a notification subscription active are never dropped."; } list endpoint { key "name"; min-elements 1; description "List of endpoints to listen for NETCONF connections."; leaf name { type string; description "An arbitrary name for the NETCONF listen endpoint."; } choice transport { mandatory true; description "Selects between available transports."; case ssh { if-feature "ssh-listen"; container ssh { description "SSH-specific listening configuration for inbound connections."; container tcp-server-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcps:tcp-server-grouping { refine "local-port" { default "830"; description "The NETCONF server will listen on the IANA-assigned well-known port value for 'netconf-ssh' (830) if no value is specified."; } } } container ssh-server-parameters { description "A wrapper around the SSH server parameters Watsen Expires December 9, 2019 [Page 29] Internet-Draft NETCONF Client and Server Models June 2019 to avoid name collisions."; uses sshs:ssh-server-grouping; } } } case tls { if-feature "tls-listen"; container tls { description "TLS-specific listening configuration for inbound connections."; container tcp-server-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcps:tcp-server-grouping { refine "local-port" { default "6513"; description "The NETCONF server will listen on the IANA-assigned well-known port value for 'netconf-tls' (6513) if no value is specified."; } } } container tls-server-parameters { description "A wrapper around the TLS server parameters to avoid name collisions."; uses tlss:tls-server-grouping { refine "client-authentication" { //must 'ca-certs or client-certs'; description "NETCONF/TLS servers MUST validate client certificates."; } augment "client-authentication" { description "Augments in the cert-to-name structure."; container cert-maps { uses x509c2n:cert-to-name; description "The cert-maps container is used by a TLS- based NETCONF server to map the NETCONF client's presented X.509 certificate to a NETCONF username. If no matching and valid cert-to-name list entry can be found, Watsen Expires December 9, 2019 [Page 30] Internet-Draft NETCONF Client and Server Models June 2019 then the NETCONF server MUST close the connection, and MUST NOT accept NETCONF messages over it."; reference "RFC WWWW: NETCONF over TLS, Section 7"; } } } } } } } } } container call-home { if-feature "ssh-call-home or tls-call-home"; presence "Enables the NETCONF server to initiate the underlying transport connection to NETCONF clients."; description "Configures call home behavior."; list netconf-client { key "name"; min-elements 1; description "List of NETCONF clients the NETCONF server is to initiate call-home connections to in parallel."; leaf name { type string; description "An arbitrary name for the remote NETCONF client."; } container endpoints { description "Container for the list of endpoints."; list endpoint { key "name"; min-elements 1; ordered-by user; description "A non-empty user-ordered list of endpoints for this NETCONF server to try to connect to in sequence. Defining more than one enables high-availability."; leaf name { type string; description "An arbitrary name for this endpoint."; } choice transport { Watsen Expires December 9, 2019 [Page 31] Internet-Draft NETCONF Client and Server Models June 2019 mandatory true; description "Selects between available transports."; case ssh { if-feature "ssh-call-home"; container ssh { description "Specifies SSH-specific call-home transport configuration."; container tcp-client-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcpc:tcp-client-grouping { refine "remote-port" { default "4334"; description "The NETCONF server will attempt to connect to the IANA-assigned well-known port for 'netconf-ch-tls' (4334) if no value is specified."; } } } container ssh-server-parameters { description "A wrapper around the SSH server parameters to avoid name collisions."; uses sshs:ssh-server-grouping; } } } case tls { if-feature "tls-call-home"; container tls { description "Specifies TLS-specific call-home transport configuration."; container tcp-client-parameters { description "A wrapper around the TCP client parameters to avoid name collisions."; uses tcpc:tcp-client-grouping { refine "remote-port" { default "4335"; description "The NETCONF server will attempt to connect to the IANA-assigned well-known port for Watsen Expires December 9, 2019 [Page 32] Internet-Draft NETCONF Client and Server Models June 2019 'netconf-ch-tls' (4335) if no value is specified."; } } } container tls-server-parameters { description "A wrapper around the TLS server parameters to avoid name collisions."; uses tlss:tls-server-grouping { refine "client-authentication" { /* commented out since auth could be external must 'ca-certs or client-certs'; */ description "NETCONF/TLS servers MUST validate client certificates."; } augment "client-authentication" { description "Augments in the cert-to-name structure."; container cert-maps { uses x509c2n:cert-to-name; description "The cert-maps container is used by a TLS-based NETCONF server to map the NETCONF client's presented X.509 certificate to a NETCONF username. If no matching and valid cert-to-name list entry can be found, then the NETCONF server MUST close the connection, and MUST NOT accept NETCONF messages over it."; reference "RFC WWWW: NETCONF over TLS, Section 7"; } } } } } } // tls } // choice } // endpoint } // endpoints container connection-type { description "Indicates the NETCONF server's preference for how the NETCONF connection is maintained."; Watsen Expires December 9, 2019 [Page 33] Internet-Draft NETCONF Client and Server Models June 2019 choice connection-type { mandatory true; description "Selects between available connection types."; case persistent-connection { container persistent { presence "Indicates that a persistent connection is to be maintained."; description "Maintain a persistent connection to the NETCONF client. If the connection goes down, immediately start trying to reconnect to the NETCONF client, using the reconnection strategy. This connection type minimizes any NETCONF client to NETCONF server data-transfer delay, albeit at the expense of holding resources longer."; } // container persistent } // case persistent-connection case periodic-connection { container periodic { presence "Indicates that a periodic connection is to be maintained."; description "Periodically connect to the NETCONF client. This connection type increases resource utilization, albeit with increased delay in NETCONF client to NETCONF client interactions. The NETCONF client SHOULD gracefully close the connection using upon completing planned activities. If the NETCONF session is not closed gracefully, the NETCONF server MUST immediately attempt to reestablish the connection. In the case that the previous connection is still active (i.e., the NETCONF client has not closed it yet), establishing a new connection is NOT RECOMMENDED."; leaf period { type uint16; units "minutes"; default "60"; description "Duration of time between periodic connections."; } leaf anchor-time { Watsen Expires December 9, 2019 [Page 34] Internet-Draft NETCONF Client and Server Models June 2019 type yang:date-and-time { // constrained to minute-level granularity pattern '\d{4}-\d{2}-\d{2}T\d{2}:\d{2}' + '(Z|[\+\-]\d{2}:\d{2})'; } description "Designates a timestamp before or after which a series of periodic connections are determined. The periodic connections occur at a whole multiple interval from the anchor time. For example, for an anchor time is 15 minutes past midnight and a period interval of 24 hours, then a periodic connection will occur 15 minutes past midnight everyday."; } leaf idle-timeout { type uint16; units "seconds"; default 120; // two minutes description "Specifies the maximum number of seconds that a NETCONF session may remain idle. A NETCONF session will be dropped if it is idle for an interval longer than this number of seconds. If set to zero, then the server will never drop a session because it is idle."; } } // container periodic } // case periodic-connection } // choice connection-type } // container connection-type container reconnect-strategy { description "The reconnection strategy directs how a NETCONF server reconnects to a NETCONF client, after discovering its connection to the client has dropped, even if due to a reboot. The NETCONF server starts with the specified endpoint and tries to connect to it max-attempts times before trying the next endpoint in the list (round robin)."; leaf start-with { type enumeration { enum first-listed { description "Indicates that reconnections should start with the first endpoint listed."; } enum last-connected { Watsen Expires December 9, 2019 [Page 35] Internet-Draft NETCONF Client and Server Models June 2019 description "Indicates that reconnections should start with the endpoint last connected to. If no previous connection has ever been established, then the first endpoint configured is used. NETCONF servers SHOULD be able to remember the last endpoint connected to across reboots."; } enum random-selection { description "Indicates that reconnections should start with a random endpoint."; } } default "first-listed"; description "Specifies which of the NETCONF client's endpoints the NETCONF server should start with when trying to connect to the NETCONF client."; } leaf max-attempts { type uint8 { range "1..max"; } default "3"; description "Specifies the number times the NETCONF server tries to connect to a specific endpoint before moving on to the next endpoint in the list (round robin)."; } } // container reconnect-strategy } // list netconf-client } // container call-home } // grouping netconf-server-grouping // Protocol accessible node, for servers that implement this // module. container netconf-server { uses netconf-server-grouping; description "Top-level container for NETCONF server configuration."; } } Watsen Expires December 9, 2019 [Page 36] Internet-Draft NETCONF Client and Server Models June 2019 5. Security Considerations The YANG module defined in this document uses groupings defined in [I-D.kwatsen-netconf-tcp-client-server], [I-D.ietf-netconf-ssh-client-server], and [I-D.ietf-netconf-tls-client-server]. Please see the Security Considerations section in those documents for concerns related those groupings. The YANG modules defined in this document are designed to be accessed via YANG based management protocols, such as NETCONF [RFC6241] and RESTCONF [RFC8040]. Both of these protocols have mandatory-to- implement secure transport layers (e.g., SSH, TLS) with mutual authentication. The NETCONF access control model (NACM) [RFC8341] provides the means to restrict access for particular users to a pre-configured subset of all available protocol operations and content. There are a number of data nodes defined in the YANG modules that are writable/creatable/deletable (i.e., config true, which is the default). Some of 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: None of the subtrees or data nodes in the modules defined in this document need to be protected from write operations. Some of the readable data nodes in the YANG modules 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: None of the subtrees or data nodes in the modules defined in this document need to be protected from read operations. Some of the RPC operations in the YANG modules may be considered sensitive or vulnerable in some network environments. It is thus important to control access to these operations. These are the operations and their sensitivity/vulnerability: The modules defined in this document do not define any 'RPC' or 'action' statements. Watsen Expires December 9, 2019 [Page 37] Internet-Draft NETCONF Client and Server Models June 2019 6. IANA Considerations 6.1. The IETF XML Registry This document registers two URIs in the "ns" subregistry of the IETF XML Registry [RFC3688]. Following the format in [RFC3688], the following registrations are requested: URI: urn:ietf:params:xml:ns:yang:ietf-netconf-client Registrant Contact: The NETCONF WG of the IETF. XML: N/A, the requested URI is an XML namespace. URI: urn:ietf:params:xml:ns:yang:ietf-netconf-server Registrant Contact: The NETCONF WG of the IETF. XML: N/A, the requested URI is an XML namespace. 6.2. The YANG Module Names Registry This document registers two YANG modules in the YANG Module Names registry [RFC6020]. Following the format in [RFC6020], the the following registrations are requested: name: ietf-netconf-client namespace: urn:ietf:params:xml:ns:yang:ietf-netconf-client prefix: ncc reference: RFC XXXX name: ietf-netconf-server namespace: urn:ietf:params:xml:ns:yang:ietf-netconf-server prefix: ncs reference: RFC XXXX 7. References 7.1. Normative References [I-D.ietf-netconf-keystore] Watsen, K., "YANG Data Model for a Centralized Keystore Mechanism", draft-ietf-netconf-keystore-09 (work in progress), April 2019. [I-D.ietf-netconf-ssh-client-server] Watsen, K., Wu, G., and L. Xia, "YANG Groupings for SSH Clients and SSH Servers", draft-ietf-netconf-ssh-client- server-13 (work in progress), April 2019. Watsen Expires December 9, 2019 [Page 38] Internet-Draft NETCONF Client and Server Models June 2019 [I-D.ietf-netconf-tls-client-server] Watsen, K., Wu, G., and L. Xia, "YANG Groupings for TLS Clients and TLS Servers", draft-ietf-netconf-tls-client- server-12 (work in progress), April 2019. [I-D.kwatsen-netconf-tcp-client-server] Watsen, K. and M. Scharf, "YANG Groupings for TCP Clients and TCP Servers", draft-kwatsen-netconf-tcp-client- server-02 (work in progress), April 2019. [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, . [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, . [RFC6991] Schoenwaelder, J., Ed., "Common YANG Data Types", RFC 6991, DOI 10.17487/RFC6991, July 2013, . [RFC7407] Bjorklund, M. and J. Schoenwaelder, "A YANG Data Model for SNMP Configuration", RFC 7407, DOI 10.17487/RFC7407, December 2014, . [RFC7589] Badra, M., Luchuk, A., and J. Schoenwaelder, "Using the NETCONF Protocol over Transport Layer Security (TLS) with Mutual X.509 Authentication", RFC 7589, DOI 10.17487/RFC7589, June 2015, . [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, . Watsen Expires December 9, 2019 [Page 39] Internet-Draft NETCONF Client and Server Models June 2019 [RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC 2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174, May 2017, . 7.2. Informative References [I-D.ietf-netconf-trust-anchors] Watsen, K., "YANG Data Model for Global Trust Anchors", draft-ietf-netconf-trust-anchors-04 (work in progress), April 2019. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, . [RFC8040] Bierman, A., Bjorklund, M., and K. Watsen, "RESTCONF Protocol", RFC 8040, DOI 10.17487/RFC8040, January 2017, . [RFC8071] Watsen, K., "NETCONF Call Home and RESTCONF Call Home", RFC 8071, DOI 10.17487/RFC8071, February 2017, . [RFC8340] Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams", BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018, . [RFC8341] Bierman, A. and M. Bjorklund, "Network Configuration Access Control Model", STD 91, RFC 8341, DOI 10.17487/RFC8341, March 2018, . Watsen Expires December 9, 2019 [Page 40] Internet-Draft NETCONF Client and Server Models June 2019 Appendix A. Expanded Tree Diagrams A.1. Expanded Tree Diagram for 'ietf-netconf-client' The following tree diagram [RFC8340] provides an overview of the data model for the "ietf-netconf-client" module. This tree diagram shows all the nodes defined in this module, including those defined by "grouping" statements used by this module. Please see Section 3.1 for a tree diagram that illustrates what the module looks like without all the "grouping" statements expanded. =========== NOTE: '\' line wrapping per BCP XX (RFC XXXX) =========== module: ietf-netconf-client +--rw netconf-client +--rw initiate! {ssh-initiate or tls-initiate}? | +--rw netconf-server* [name] | +--rw name string | +--rw endpoints | | +--rw endpoint* [name] | | +--rw name string | | +--rw (transport) | | +--:(ssh) {ssh-initiate}? | | | +--rw ssh | | | +--rw tcp-client-parameters | | | | +--rw remote-address inet:host | | | | +--rw remote-port? inet:port-number | | | | +--rw local-address? inet:ip-address | | | | | {local-binding-supported}? | | | | +--rw local-port? inet:port-number | | | | | {local-binding-supported}? | | | | +--rw keepalives! | | | | {keepalives-supported}? | | | | +--rw idle-time uint16 | | | | +--rw max-probes uint16 | | | | +--rw probe-interval uint16 | | | +--rw ssh-client-parameters | | | +--rw client-identity | | | | +--rw username? string | | | | +--rw (auth-type) | | | | +--:(password) | | | | | +--rw password? string | | | | +--:(public-key) | | | | | +--rw public-key | | | | | +--rw (local-or-keystore) | | | | | +--:(local) Watsen Expires December 9, 2019 [Page 41] Internet-Draft NETCONF Client and Server Models June 2019 | | | | | | {local-definiti\ ons-supported}? | | | | | | +--rw local-definition | | | | | | +--rw algorithm | | | | | | | asymmetric\ -key-algorithm-ref | | | | | | +--rw public-key | | | | | | | binary | | | | | | +--rw private-key | | | | | | union | | | | | +--:(keystore) | | | | | {keystore-suppo\ rted}? | | | | | +--rw keystore-refere\ nce? | | | | | ks:asymmetric\ -key-ref | | | | +--:(certificate) | | | | +--rw certificate | | | | {sshcmn:ssh-x509-certs\ }? | | | | +--rw (local-or-keystore) | | | | +--:(local) | | | | | {local-definiti\ ons-supported}? | | | | | +--rw local-definition | | | | | +--rw algorithm | | | | | | asymmetric\ -key-algorithm-ref | | | | | +--rw public-key | | | | | | binary | | | | | +--rw private-key | | | | | | union | | | | | +--rw cert? | | | | | | end-entity\ -cert-cms | | | | | +---n certificate-\ expiration | | | | | | +-- expiration-\ date | | | | | | yang:da\ te-and-time | | | | | +---x generate-cer\ tificate-signing-request | | | | | +---w input | | | | | | +---w subject | | | | | | | bina\ ry Watsen Expires December 9, 2019 [Page 42] Internet-Draft NETCONF Client and Server Models June 2019 | | | | | | +---w attrib\ utes? | | | | | | bina\ ry | | | | | +--ro output | | | | | +--ro certif\ icate-signing-request | | | | | bina\ ry | | | | +--:(keystore) | | | | {keystore-suppo\ rted}? | | | | +--rw keystore-refere\ nce? | | | | ks:asymmetric\ -key-certificate-ref | | | +--rw server-authentication | | | | +--rw ssh-host-keys? | | | | | ts:host-keys-ref | | | | | {ts:ssh-host-keys}? | | | | +--rw ca-certs? | | | | | ts:certificates-ref | | | | | {sshcmn:ssh-x509-certs,ts:x5\ 09-certificates}? | | | | +--rw server-certs? | | | | ts:certificates-ref | | | | {sshcmn:ssh-x509-certs,ts:x5\ 09-certificates}? | | | +--rw transport-params | | | | {ssh-client-transport-params-co\ nfig}? | | | | +--rw host-key | | | | | +--rw host-key-alg* identityref | | | | +--rw key-exchange | | | | | +--rw key-exchange-alg* | | | | | identityref | | | | +--rw encryption | | | | | +--rw encryption-alg* | | | | | identityref | | | | +--rw mac | | | | +--rw mac-alg* identityref | | | +--rw keepalives! | | | {ssh-client-keepalives}? | | | +--rw max-wait? uint16 | | | +--rw max-attempts? uint8 | | +--:(tls) {tls-initiate}? | | +--rw tls | | +--rw tcp-client-parameters Watsen Expires December 9, 2019 [Page 43] Internet-Draft NETCONF Client and Server Models June 2019 | | | +--rw remote-address inet:host | | | +--rw remote-port? inet:port-number | | | +--rw local-address? inet:ip-address | | | | {local-binding-supported}? | | | +--rw local-port? inet:port-number | | | | {local-binding-supported}? | | | +--rw keepalives! | | | {keepalives-supported}? | | | +--rw idle-time uint16 | | | +--rw max-probes uint16 | | | +--rw probe-interval uint16 | | +--rw tls-client-parameters | | +--rw client-identity | | | +--rw (auth-type) | | | +--:(certificate) | | | +--rw certificate | | | +--rw (local-or-keystore) | | | +--:(local) | | | | {local-definiti\ ons-supported}? | | | | +--rw local-definition | | | | +--rw algorithm | | | | | asymmetric\ -key-algorithm-ref | | | | +--rw public-key | | | | | binary | | | | +--rw private-key | | | | | union | | | | +--rw cert? | | | | | end-entity\ -cert-cms | | | | +---n certificate-\ expiration | | | | | +-- expiration-\ date | | | | | yang:da\ te-and-time | | | | +---x generate-cer\ tificate-signing-request | | | | +---w input | | | | | +---w subject | | | | | | bina\ ry | | | | | +---w attrib\ utes? | | | | | bina\ ry | | | | +--ro output Watsen Expires December 9, 2019 [Page 44] Internet-Draft NETCONF Client and Server Models June 2019 | | | | +--ro certif\ icate-signing-request | | | | bina\ ry | | | +--:(keystore) | | | {keystore-suppo\ rted}? | | | +--rw keystore-refere\ nce? | | | ks:asymmetric\ -key-certificate-ref | | +--rw server-authentication | | | +--rw ca-certs? | | | | ts:certificates-ref | | | | {ts:x509-certificates}? | | | +--rw server-certs? | | | ts:certificates-ref | | | {ts:x509-certificates}? | | +--rw hello-params | | | {tls-client-hello-params-config\ }? | | | +--rw tls-versions | | | | +--rw tls-version* identityref | | | +--rw cipher-suites | | | +--rw cipher-suite* identityref | | +--rw keepalives! | | {tls-client-keepalives}? | | +--rw max-wait? uint16 | | +--rw max-attempts? uint8 | +--rw connection-type | | +--rw (connection-type) | | +--:(persistent-connection) | | | +--rw persistent! | | +--:(periodic-connection) | | +--rw periodic! | | +--rw period? uint16 | | +--rw anchor-time? yang:date-and-time | | +--rw idle-timeout? uint16 | +--rw reconnect-strategy | +--rw start-with? enumeration | +--rw max-attempts? uint8 +--rw listen! {ssh-listen or tls-listen}? +--rw idle-timeout? uint16 +--rw endpoint* [name] +--rw name string +--rw (transport) +--:(ssh) {ssh-listen}? | +--rw ssh Watsen Expires December 9, 2019 [Page 45] Internet-Draft NETCONF Client and Server Models June 2019 | +--rw tcp-server-parameters | | +--rw local-address | | | inet:ip-address | | +--rw local-port? | | | inet:port-number | | +--rw keepalives! {keepalives-supported}? | | | +--rw idle-time uint16 | | | +--rw max-probes uint16 | | | +--rw probe-interval uint16 | | +--rw external-endpoint-values! | | {external-endpoints}? | | +--rw address inet:ip-address | | +--rw port? inet:port-number | +--rw ssh-client-parameters | +--rw client-identity | | +--rw username? string | | +--rw (auth-type) | | +--:(password) | | | +--rw password? string | | +--:(public-key) | | | +--rw public-key | | | +--rw (local-or-keystore) | | | +--:(local) | | | | {local-definitions-su\ pported}? | | | | +--rw local-definition | | | | +--rw algorithm | | | | | asymmetric-key-a\ lgorithm-ref | | | | +--rw public-key | | | | | binary | | | | +--rw private-key | | | | union | | | +--:(keystore) | | | {keystore-supported}? | | | +--rw keystore-reference? | | | ks:asymmetric-key-r\ ef | | +--:(certificate) | | +--rw certificate | | {sshcmn:ssh-x509-certs}? | | +--rw (local-or-keystore) | | +--:(local) | | | {local-definitions-su\ pported}? | | | +--rw local-definition | | | +--rw algorithm | | | | asymmetric-key-a\ Watsen Expires December 9, 2019 [Page 46] Internet-Draft NETCONF Client and Server Models June 2019 lgorithm-ref | | | +--rw public-key | | | | binary | | | +--rw private-key | | | | union | | | +--rw cert? | | | | end-entity-cert-\ cms | | | +---n certificate-expira\ tion | | | | +-- expiration-date | | | | yang:date-and\ -time | | | +---x generate-certifica\ te-signing-request | | | +---w input | | | | +---w subject | | | | | binary | | | | +---w attributes? | | | | binary | | | +--ro output | | | +--ro certificate-\ signing-request | | | binary | | +--:(keystore) | | {keystore-supported}? | | +--rw keystore-reference? | | ks:asymmetric-key-c\ ertificate-ref | +--rw server-authentication | | +--rw ssh-host-keys? ts:host-keys-ref | | | {ts:ssh-host-keys}? | | +--rw ca-certs? ts:certificates-ref | | | {sshcmn:ssh-x509-certs,ts:x509-cer\ tificates}? | | +--rw server-certs? ts:certificates-ref | | {sshcmn:ssh-x509-certs,ts:x509-cer\ tificates}? | +--rw transport-params | | {ssh-client-transport-params-config}? | | +--rw host-key | | | +--rw host-key-alg* identityref | | +--rw key-exchange | | | +--rw key-exchange-alg* identityref | | +--rw encryption | | | +--rw encryption-alg* identityref | | +--rw mac | | +--rw mac-alg* identityref Watsen Expires December 9, 2019 [Page 47] Internet-Draft NETCONF Client and Server Models June 2019 | +--rw keepalives! {ssh-client-keepalives}? | +--rw max-wait? uint16 | +--rw max-attempts? uint8 +--:(tls) {tls-listen}? +--rw tls +--rw tcp-server-parameters | +--rw local-address | | inet:ip-address | +--rw local-port? | | inet:port-number | +--rw keepalives! {keepalives-supported}? | | +--rw idle-time uint16 | | +--rw max-probes uint16 | | +--rw probe-interval uint16 | +--rw external-endpoint-values! | {external-endpoints}? | +--rw address inet:ip-address | +--rw port? inet:port-number +--rw tls-client-parameters +--rw client-identity | +--rw (auth-type) | +--:(certificate) | +--rw certificate | +--rw (local-or-keystore) | +--:(local) | | {local-definitions-su\ pported}? | | +--rw local-definition | | +--rw algorithm | | | asymmetric-key-a\ lgorithm-ref | | +--rw public-key | | | binary | | +--rw private-key | | | union | | +--rw cert? | | | end-entity-cert-\ cms | | +---n certificate-expira\ tion | | | +-- expiration-date | | | yang:date-and\ -time | | +---x generate-certifica\ te-signing-request | | +---w input | | | +---w subject | | | | binary Watsen Expires December 9, 2019 [Page 48] Internet-Draft NETCONF Client and Server Models June 2019 | | | +---w attributes? | | | binary | | +--ro output | | +--ro certificate-\ signing-request | | binary | +--:(keystore) | {keystore-supported}? | +--rw keystore-reference? | ks:asymmetric-key-c\ ertificate-ref +--rw server-authentication | +--rw ca-certs? ts:certificates-ref | | {ts:x509-certificates}? | +--rw server-certs? ts:certificates-ref | {ts:x509-certificates}? +--rw hello-params | {tls-client-hello-params-config}? | +--rw tls-versions | | +--rw tls-version* identityref | +--rw cipher-suites | +--rw cipher-suite* identityref +--rw keepalives! {tls-client-keepalives}? +--rw max-wait? uint16 +--rw max-attempts? uint8 A.2. Expanded Tree Diagram for 'ietf-netconf-server' The following tree diagram [RFC8340] provides an overview of the data model for the "ietf-netconf-server" module. This tree diagram shows all the nodes defined in this module, including those defined by "grouping" statements used by this module. Please see Section 4.1 for a tree diagram that illustrates what the module looks like without all the "grouping" statements expanded. =========== NOTE: '\' line wrapping per BCP XX (RFC XXXX) =========== module: ietf-netconf-server +--rw netconf-server +--rw listen! {ssh-listen or tls-listen}? | +--rw idle-timeout? uint16 | +--rw endpoint* [name] | +--rw name string | +--rw (transport) | +--:(ssh) {ssh-listen}? | | +--rw ssh Watsen Expires December 9, 2019 [Page 49] Internet-Draft NETCONF Client and Server Models June 2019 | | +--rw tcp-server-parameters | | | +--rw local-address | | | | inet:ip-address | | | +--rw local-port? | | | | inet:port-number | | | +--rw keepalives! {keepalives-supported}? | | | | +--rw idle-time uint16 | | | | +--rw max-probes uint16 | | | | +--rw probe-interval uint16 | | | +--rw external-endpoint-values! | | | {external-endpoints}? | | | +--rw address inet:ip-address | | | +--rw port? inet:port-number | | +--rw ssh-server-parameters | | +--rw server-identity | | | +--rw host-key* [name] | | | +--rw name string | | | +--rw (host-key-type) | | | +--:(public-key) | | | | +--rw public-key | | | | +--rw (local-or-keystore) | | | | +--:(local) | | | | | {local-definitions\ -supported}? | | | | | +--rw local-definition | | | | | +--rw algorithm | | | | | | asymmetric-ke\ y-algorithm-ref | | | | | +--rw public-key | | | | | | binary | | | | | +--rw private-key | | | | | union | | | | +--:(keystore) | | | | {keystore-supporte\ d}? | | | | +--rw keystore-reference? | | | | ks:asymmetric-ke\ y-ref | | | +--:(certificate) | | | +--rw certificate | | | {sshcmn:ssh-x509-certs}? | | | +--rw (local-or-keystore) | | | +--:(local) | | | | {local-definitions\ -supported}? | | | | +--rw local-definition | | | | +--rw algorithm | | | | | asymmetric-ke\ Watsen Expires December 9, 2019 [Page 50] Internet-Draft NETCONF Client and Server Models June 2019 y-algorithm-ref | | | | +--rw public-key | | | | | binary | | | | +--rw private-key | | | | | union | | | | +--rw cert? | | | | | end-entity-ce\ rt-cms | | | | +---n certificate-exp\ iration | | | | | +-- expiration-date | | | | | yang:date-\ and-time | | | | +---x generate-certif\ icate-signing-request | | | | +---w input | | | | | +---w subject | | | | | | binary | | | | | +---w attribute\ s? | | | | | binary | | | | +--ro output | | | | +--ro certifica\ te-signing-request | | | | binary | | | +--:(keystore) | | | {keystore-supporte\ d}? | | | +--rw keystore-reference? | | | ks:asymmetric-ke\ y-certificate-ref | | +--rw client-authentication | | | +--rw supported-authentication-methods | | | | +--rw publickey? empty | | | | +--rw passsword? empty | | | | +--rw hostbased? empty | | | | +--rw none? empty | | | | +--rw other* string | | | +--rw (local-or-external) | | | +--:(local) | | | | {local-client-auth-supported}? | | | | +--rw users | | | | +--rw user* [name] | | | | +--rw name string | | | | +--rw password? | | | | | ianach:crypt-hash | | | | +--rw authorized-key* [name] | | | | +--rw name string Watsen Expires December 9, 2019 [Page 51] Internet-Draft NETCONF Client and Server Models June 2019 | | | | +--rw algorithm string | | | | +--rw key-data binary | | | +--:(external) | | | {external-client-auth-supporte\ d}? | | | +--rw client-auth-defined-elsewhere? | | | empty | | +--rw transport-params | | | {ssh-server-transport-params-config}? | | | +--rw host-key | | | | +--rw host-key-alg* identityref | | | +--rw key-exchange | | | | +--rw key-exchange-alg* identityref | | | +--rw encryption | | | | +--rw encryption-alg* identityref | | | +--rw mac | | | +--rw mac-alg* identityref | | +--rw keepalives! {ssh-server-keepalives}? | | +--rw max-wait? uint16 | | +--rw max-attempts? uint8 | +--:(tls) {tls-listen}? | +--rw tls | +--rw tcp-server-parameters | | +--rw local-address | | | inet:ip-address | | +--rw local-port? | | | inet:port-number | | +--rw keepalives! {keepalives-supported}? | | | +--rw idle-time uint16 | | | +--rw max-probes uint16 | | | +--rw probe-interval uint16 | | +--rw external-endpoint-values! | | {external-endpoints}? | | +--rw address inet:ip-address | | +--rw port? inet:port-number | +--rw tls-server-parameters | +--rw server-identity | | +--rw (local-or-keystore) | | +--:(local) | | | {local-definitions-supported}? | | | +--rw local-definition | | | +--rw algorithm | | | | asymmetric-key-algorithm-\ ref | | | +--rw public-key | | | | binary | | | +--rw private-key | | | | union Watsen Expires December 9, 2019 [Page 52] Internet-Draft NETCONF Client and Server Models June 2019 | | | +--rw cert? | | | | end-entity-cert-cms | | | +---n certificate-expiration | | | | +-- expiration-date | | | | yang:date-and-time | | | +---x generate-certificate-signin\ g-request | | | +---w input | | | | +---w subject binary | | | | +---w attributes? binary | | | +--ro output | | | +--ro certificate-signing-r\ equest | | | binary | | +--:(keystore) {keystore-supported}? | | +--rw keystore-reference? | | ks:asymmetric-key-certificat\ e-ref | +--rw client-authentication! | | +--rw (required-or-optional) | | | +--:(required) | | | | +--rw required? | | | | empty | | | +--:(optional) | | | +--rw optional? | | | empty | | +--rw (local-or-external) | | | +--:(local) | | | | {local-client-auth-supported}? | | | | +--rw ca-certs? | | | | | ts:certificates-ref | | | | | {ts:x509-certificates}? | | | | +--rw client-certs? | | | | ts:certificates-ref | | | | {ts:x509-certificates}? | | | +--:(external) | | | {external-client-auth-supporte\ d}? | | | +--rw client-auth-defined-elsewhere? | | | empty | | +--rw cert-maps | | +--rw cert-to-name* [id] | | +--rw id uint32 | | +--rw fingerprint | | | x509c2n:tls-fingerprint | | +--rw map-type identityref | | +--rw name string | +--rw hello-params Watsen Expires December 9, 2019 [Page 53] Internet-Draft NETCONF Client and Server Models June 2019 | | {tls-server-hello-params-config}? | | +--rw tls-versions | | | +--rw tls-version* identityref | | +--rw cipher-suites | | +--rw cipher-suite* identityref | +--rw keepalives! {tls-server-keepalives}? | +--rw max-wait? uint16 | +--rw max-attempts? uint8 +--rw call-home! {ssh-call-home or tls-call-home}? +--rw netconf-client* [name] +--rw name string +--rw endpoints | +--rw endpoint* [name] | +--rw name string | +--rw (transport) | +--:(ssh) {ssh-call-home}? | | +--rw ssh | | +--rw tcp-client-parameters | | | +--rw remote-address inet:host | | | +--rw remote-port? inet:port-number | | | +--rw local-address? inet:ip-address | | | | {local-binding-supported}? | | | +--rw local-port? inet:port-number | | | | {local-binding-supported}? | | | +--rw keepalives! | | | {keepalives-supported}? | | | +--rw idle-time uint16 | | | +--rw max-probes uint16 | | | +--rw probe-interval uint16 | | +--rw ssh-server-parameters | | +--rw server-identity | | | +--rw host-key* [name] | | | +--rw name string | | | +--rw (host-key-type) | | | +--:(public-key) | | | | +--rw public-key | | | | +--rw (local-or-keystore) | | | | +--:(local) | | | | | {local-defin\ itions-supported}? | | | | | +--rw local-defini\ tion | | | | | +--rw algorithm | | | | | | asymmet\ ric-key-algorithm-ref | | | | | +--rw public-key | | | | | | binary | | | | | +--rw private-k\ Watsen Expires December 9, 2019 [Page 54] Internet-Draft NETCONF Client and Server Models June 2019 ey | | | | | union | | | | +--:(keystore) | | | | {keystore-su\ pported}? | | | | +--rw keystore-ref\ erence? | | | | ks:asymmet\ ric-key-ref | | | +--:(certificate) | | | +--rw certificate | | | {sshcmn:ssh-x509-ce\ rts}? | | | +--rw (local-or-keystore) | | | +--:(local) | | | | {local-defin\ itions-supported}? | | | | +--rw local-defini\ tion | | | | +--rw algorithm | | | | | asymmet\ ric-key-algorithm-ref | | | | +--rw public-key | | | | | binary | | | | +--rw private-k\ ey | | | | | union | | | | +--rw cert? | | | | | end-ent\ ity-cert-cms | | | | +---n certifica\ te-expiration | | | | | +-- expirati\ on-date | | | | | yang\ :date-and-time | | | | +---x generate-\ certificate-signing-request | | | | +---w input | | | | | +---w sub\ ject | | | | | | b\ inary | | | | | +---w att\ ributes? | | | | | b\ inary | | | | +--ro output Watsen Expires December 9, 2019 [Page 55] Internet-Draft NETCONF Client and Server Models June 2019 | | | | +--ro cer\ tificate-signing-request | | | | b\ inary | | | +--:(keystore) | | | {keystore-su\ pported}? | | | +--rw keystore-ref\ erence? | | | ks:asymmet\ ric-key-certificate-ref | | +--rw client-authentication | | | +--rw supported-authentication-metho\ ds | | | | +--rw publickey? empty | | | | +--rw passsword? empty | | | | +--rw hostbased? empty | | | | +--rw none? empty | | | | +--rw other* string | | | +--rw (local-or-external) | | | +--:(local) | | | | {local-client-auth-suppo\ rted}? | | | | +--rw users | | | | +--rw user* [name] | | | | +--rw name | | | | | string | | | | +--rw password? | | | | | ianach:crypt-hash | | | | +--rw authorized-key* | | | | [name] | | | | +--rw name | | | | | string | | | | +--rw algorithm | | | | | string | | | | +--rw key-data | | | | binary | | | +--:(external) | | | {external-client-auth-su\ pported}? | | | +--rw client-auth-defined-else\ where? | | | empty | | +--rw transport-params | | | {ssh-server-transport-params-co\ nfig}? | | | +--rw host-key | | | | +--rw host-key-alg* identityref Watsen Expires December 9, 2019 [Page 56] Internet-Draft NETCONF Client and Server Models June 2019 | | | +--rw key-exchange | | | | +--rw key-exchange-alg* | | | | identityref | | | +--rw encryption | | | | +--rw encryption-alg* | | | | identityref | | | +--rw mac | | | +--rw mac-alg* identityref | | +--rw keepalives! | | {ssh-server-keepalives}? | | +--rw max-wait? uint16 | | +--rw max-attempts? uint8 | +--:(tls) {tls-call-home}? | +--rw tls | +--rw tcp-client-parameters | | +--rw remote-address inet:host | | +--rw remote-port? inet:port-number | | +--rw local-address? inet:ip-address | | | {local-binding-supported}? | | +--rw local-port? inet:port-number | | | {local-binding-supported}? | | +--rw keepalives! | | {keepalives-supported}? | | +--rw idle-time uint16 | | +--rw max-probes uint16 | | +--rw probe-interval uint16 | +--rw tls-server-parameters | +--rw server-identity | | +--rw (local-or-keystore) | | +--:(local) | | | {local-definitions-suppo\ rted}? | | | +--rw local-definition | | | +--rw algorithm | | | | asymmetric-key-algo\ rithm-ref | | | +--rw public-key | | | | binary | | | +--rw private-key | | | | union | | | +--rw cert? | | | | end-entity-cert-cms | | | +---n certificate-expiration | | | | +-- expiration-date | | | | yang:date-and-ti\ me | | | +---x generate-certificate-\ signing-request Watsen Expires December 9, 2019 [Page 57] Internet-Draft NETCONF Client and Server Models June 2019 | | | +---w input | | | | +---w subject | | | | | binary | | | | +---w attributes? | | | | binary | | | +--ro output | | | +--ro certificate-sig\ ning-request | | | binary | | +--:(keystore) | | {keystore-supported}? | | +--rw keystore-reference? | | ks:asymmetric-key-cert\ ificate-ref | +--rw client-authentication! | | +--rw (required-or-optional) | | | +--:(required) | | | | +--rw required? | | | | empty | | | +--:(optional) | | | +--rw optional? | | | empty | | +--rw (local-or-external) | | | +--:(local) | | | | {local-client-auth-suppo\ rted}? | | | | +--rw ca-certs? | | | | | ts:certificates-ref | | | | | {ts:x509-certificates}? | | | | +--rw client-certs? | | | | ts:certificates-ref | | | | {ts:x509-certificates}? | | | +--:(external) | | | {external-client-auth-su\ pported}? | | | +--rw client-auth-defined-else\ where? | | | empty | | +--rw cert-maps | | +--rw cert-to-name* [id] | | +--rw id uint32 | | +--rw fingerprint | | | x509c2n:tls-fingerprint | | +--rw map-type | | | identityref | | +--rw name string | +--rw hello-params | | {tls-server-hello-params-config\ Watsen Expires December 9, 2019 [Page 58] Internet-Draft NETCONF Client and Server Models June 2019 }? | | +--rw tls-versions | | | +--rw tls-version* identityref | | +--rw cipher-suites | | +--rw cipher-suite* identityref | +--rw keepalives! | {tls-server-keepalives}? | +--rw max-wait? uint16 | +--rw max-attempts? uint8 +--rw connection-type | +--rw (connection-type) | +--:(persistent-connection) | | +--rw persistent! | +--:(periodic-connection) | +--rw periodic! | +--rw period? uint16 | +--rw anchor-time? yang:date-and-time | +--rw idle-timeout? uint16 +--rw reconnect-strategy +--rw start-with? enumeration +--rw max-attempts? uint8 Appendix B. Change Log B.1. 00 to 01 o Renamed "keychain" to "keystore". B.2. 01 to 02 o Added to ietf-netconf-client ability to connected to a cluster of endpoints, including a reconnection-strategy. o Added to ietf-netconf-client the ability to configure connection- type and also keep-alive strategy. o Updated both modules to accommodate new groupings in the ssh/tls drafts. B.3. 02 to 03 o Refined use of tls-client-grouping to add a must statement indicating that the TLS client must specify a client-certificate. o Changed 'netconf-client' to be a grouping (not a container). Watsen Expires December 9, 2019 [Page 59] Internet-Draft NETCONF Client and Server Models June 2019 B.4. 03 to 04 o Added RFC 8174 to Requirements Language Section. o Replaced refine statement in ietf-netconf-client to add a mandatory true. o Added refine statement in ietf-netconf-server to add a must statement. o Now there are containers and groupings, for both the client and server models. B.5. 04 to 05 o Now tree diagrams reference ietf-netmod-yang-tree-diagrams o Updated examples to inline key and certificates (no longer a leafref to keystore) B.6. 05 to 06 o Fixed change log missing section issue. o Updated examples to match latest updates to the crypto-types, trust-anchors, and keystore drafts. o Reduced line length of the YANG modules to fit within 69 columns. B.7. 06 to 07 o Removed "idle-timeout" from "persistent" connection config. o Added "random-selection" for reconnection-strategy's "starts-with" enum. o Replaced "connection-type" choice default (persistent) with "mandatory true". o Reduced the periodic-connection's "idle-timeout" from 5 to 2 minutes. o Replaced reconnect-timeout with period/anchor-time combo. Watsen Expires December 9, 2019 [Page 60] Internet-Draft NETCONF Client and Server Models June 2019 B.8. 07 to 08 o Modified examples to be compatible with new crypto-types algs B.9. 08 to 09 o Corrected use of "mandatory true" for "address" leafs. o Updated examples to reflect update to groupings defined in the keystore draft. o Updated to use groupings defined in new TCP and HTTP drafts. o Updated copyright date, boilerplate template, affiliation, and folding algorithm. B.10. 09 to 10 o Reformatted YANG modules. B.11. 10 to 11 o Adjusted for the top-level "demux container" added to groupings imported from other modules. o Added "must" expressions to ensure that keepalives are not configured for "periodic" connections. o Updated the boilerplate text in module-level "description" statement to match copyeditor convention. o Moved "expanded" tree diagrams to the Appendix. B.12. 11 to 12 o Removed the "Design Considerations" section. o Removed the 'must' statement limiting keepalives in periodic connections. o Updated models and examples to reflect removal of the "demux" containers in the imported models. o Updated the "periodic-connnection" description statements to be more like the RESTCONF draft, especially where it described dropping the underlying TCP connection. Watsen Expires December 9, 2019 [Page 61] Internet-Draft NETCONF Client and Server Models June 2019 o Updated text to better reference where certain examples come from (e.g., which Section in which draft). o In the server model, commented out the "must 'pinned-ca-certs or pinned-client-certs'" statement to reflect change made in the TLS draft whereby the trust anchors MAY be defined externally. o Replaced the 'listen', 'initiate', and 'call-home' features with boolean expressions. B.13. 12 to 13 o Updated to reflect changes in trust-anchors drafts (e.g., s/trust- anchors/truststore/g + s/pinned.//) Acknowledgements The authors would like to thank for following for lively discussions on list and in the halls (ordered by last name): Andy Bierman, Martin Bjorklund, Benoit Claise, Ramkumar Dhanapal, Mehmet Ersue, Balazs Kovacs, David Lamparter, Alan Luchuk, Ladislav Lhotka, Radek Krejci, Tom Petch, Juergen Schoenwaelder, Phil Shafer, Sean Turner, and Bert Wijnen. Author's Address Kent Watsen Watsen Networks EMail: kent+ietf@watsen.net Watsen Expires December 9, 2019 [Page 62]