DHC Working Group Y. Cui Internet-Draft H. Wang Intended status: Standards Track L. Sun Expires: October 19, 2015 Tsinghua University T. Lemon Nominum April 17, 2015 YANG Data Model for DHCPv6 Configuration draft-cui-dhc-dhcpv6-yang-02 Abstract There has no unified method to configure DHCPv6 server ,relay and client itself, always pre-configured manually by operators. IETF netmod WG has developed a general data model for NETCONF protocol, YANG data model [RFC6020]. This document defines a YANG data model for the configuration and management of DHCPv6 server, DHCPv6 relay and DHCPv6 client. With this model, the operators can configure and manage the devices by using NETCONF. Requirements Language The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at 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 October 19, 2015. Cui, et al. Expires October 19, 2015 [Page 1] Internet-Draft YANG for DHCPv6 April 2015 Copyright Notice Copyright (c) 2015 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. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 3 2. Objectives . . . . . . . . . . . . . . . . . . . . . . . . . 3 2.1. DHCPv6 server . . . . . . . . . . . . . . . . . . . . . . 3 2.2. DHCPv6 relay . . . . . . . . . . . . . . . . . . . . . . 3 2.3. DHCPv6 client . . . . . . . . . . . . . . . . . . . . . . 3 3. DHCPv6 Tree Diagrams . . . . . . . . . . . . . . . . . . . . 4 3.1. DHCPv6 Server Tree Diagrams . . . . . . . . . . . . . . . 4 3.2. DHCPv6 Relay Tree Diagrams . . . . . . . . . . . . . . . 7 3.3. DHCPv6 Client Tree Diagrams . . . . . . . . . . . . . . . 9 3.4. Notifications Mechanism for DHCPv6 . . . . . . . . . . . 11 4. DHCPv6 YANG Model . . . . . . . . . . . . . . . . . . . . . . 13 5. Security Considerations (TBD) . . . . . . . . . . . . . . . . 34 6. IANA Considerations (TBD) . . . . . . . . . . . . . . . . . . 34 7. Acknowledgements (TBD) . . . . . . . . . . . . . . . . . . . 34 8. Normative References . . . . . . . . . . . . . . . . . . . . 34 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 34 1. Introduction This document defines a YANG data model for the configuration and management of DHCPv6 server, DHCPv6 relay and DHCPv6 client. With this model, the operators can configure and manage the devices by using NETCONF. Model include three sub-modules: o DHCPv6 server o DHCPv6 relay Cui, et al. Expires October 19, 2015 [Page 2] Internet-Draft YANG for DHCPv6 April 2015 o DHCPv6 client 1.1. Terminology The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in [RFC2119]. The reader should be familiar with the terms defined in DHCPv6 [RFC3315] and relevant documents. DHCPv6 tree diagrams provide a concise representation of a YANG module to help readers understand the module structure. The meaning if the symbols in these diagrams is as follows: o Brackets "[" and "]" enclose list keys. o Braces "{" and "}" enclose feature content. o Parentheses "(" and ")" enclose choice and case nodes, and case nodes are also marked with a colon (":"). o Symbols after data node names: "?" means an optional node, and "*" denotes a list and leaf-list. o Abbreviations before data node names: "rw" means configuration data (read-write), and "ro" means state data (read-only). 2. Objectives This document defines a YANG data model that can be used to configure and manage DHCPv6 server, DHCPv6 relay and DHCPv6 client. 2.1. DHCPv6 server DHCPv6 server parameters. 2.2. DHCPv6 relay DHCPv6 relay parameters. 2.3. DHCPv6 client DHCPv6 client parameters. Cui, et al. Expires October 19, 2015 [Page 3] Internet-Draft YANG for DHCPv6 April 2015 3. DHCPv6 Tree Diagrams 3.1. DHCPv6 Server Tree Diagrams +--rw dhcpv6 +--rw server {dhcpv6-server}? +--rw serv-attributes | +--rw name string | +--ro duid uint32 | +--rw enable boolean | +--rw description? string | +--rw pd-function boolean | +--rw stateless-service boolean | +--rw rapid-commit boolean | +--ro vendor-info | +--ro ent-num uint8 | +--ro data* string +--rw address-pools | +--rw address-pool* [pool-id] | | +--rw pool-id uint8 | | +--rw pool-prefix inet:ipv6-prefix | | +--rw start-address inet:ipv6-address-no-zone | | +--rw end-address inet:ipv6-address-no-zone | | +--rw preferred-lifetime yang:timeticks | | +--rw valid-lifetime yang:timeticks | | +--ro used-ipv6-count uint32 | | +--ro idle-ipv6-count uint32 | +--ro binding-info* [cli-duid] | +--ro cli-duid uint32 | +--ro cli-ia* [iaid] | +--ro ia-type string | +--ro iaid uint8 | +--ro cli-addr* inet:ipv6-address | +--ro pool-id? uint8 +--rw prefix-pools | +--rw prefix-pool* [pool-id] | | +--rw pool-id uint8 | | +--rw prefix inet:ipv6-prefix | | +--rw prefix-length uint8 | | +--rw preferred-lifetime yang:timeticks | | +--rw valid-lifetime yang:timeticks | +--ro binding-info* [cli-duid] | +--ro cli-duid uint32 | +--ro cli-iapd* [iaid] | +--ro iaid uint8 | +--ro cli-prefix* inet:ipv6-prefix | +--ro cli-prefix-len* uint8 | +--ro pool-id? uint8 Cui, et al. Expires October 19, 2015 [Page 4] Internet-Draft YANG for DHCPv6 April 2015 +--rw other-paras | +--rw dns-server* [dns-serv-id] | | +--rw dns-serv-id uint8 | | +--rw dns-serv-addr inet:ipv6-address | +--rw domain-search-list string | +--rw sip-server* [sip-serv-id] | | +--rw sip-serv-id uint8 | | +--rw sip-serv-domain-name string | | +--rw sip-serv-addr inet:ipv6-address | +--rw sntp-server* [sntp-serv-id] | | +--rw sntp-serv-id uint8 | | +--rw sntp-serv-addr inet:ipv6-address | +--rw ntp-serv-paras* [ntp-serv-id] | | +--rw ntp-serv-id uint8 | | +--rw ntp-serv-addr inet:ipv6-address | | +--rw ntp-serv-mul-addr inet:ipv6-address | | +--rw ntp-serv-fqdn string | +--rw nis-paras | | +--rw nis-serv-addr inet:ipv6-address | | +--rw nis-cli-info* [cli-duid] | | +--rw cli-duid uint32 | | +--rw cli-domain-name string | +--rw nisp-paras | +--rw nisp-serv-addr inet:ipv6-address | +--rw nisp-cli-info* [cli-duid] | +--rw cli-duid uint32 | +--rw cli-domain-name string +--rw relay-opaque-paras | +--rw relays* [relay-name] | +--rw relay-name string | +--rw interface-info* [if-name] | | +--rw if-name string | | +--rw interface-id string | +--rw subscribers* [subscriber] | | +--rw subscriber uint8 | | +--rw subscriber-id string | +--rw remote-host* [ent-num] | +--rw ent-num uint8 | +--rw remote-id string +--ro packet-stats +--ro solicit-count uint32 +--ro request-count uint32 +--ro renew-count uint32 +--ro rebind-count uint32 +--ro decline-count uint32 +--ro release-count uint32 +--ro info-req-count uint32 +--ro advertise-count uint32 Cui, et al. Expires October 19, 2015 [Page 5] Internet-Draft YANG for DHCPv6 April 2015 +--ro confirm-count uint32 +--ro reply-count uint32 +--ro reconfigure-count uint32 +--ro relay-forward-count uint32 +--ro relay-reply-count uint32 Figure 1: DHCPv6 Data Model Structure Introduction of important nodes: o serv-attributes: This container contains basic attributes of a DHCPv6 server such as DUID, server name and so on. Some optional functions that can be provided by the server is also included. o duid: Each server and client has only one DUID (DHCP Unique Identifier). The DUID here identifies a unique DHCPv6 server for clients. o pd-function: Whether the server can act as a delegating router to perform prefix delegation ([RFC3633]). o two-step-interaction : A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315]). o rapid-commit: Setting the value to '1' represents the server support the Solicit-Reply message exchange. '0' means the server will simply ignore the Rapid Commit option in Solicit message. o address-pools: A container describes the DHCPv6 server's address pools. o address-pool: A DHCPv6 server can be configured with several address pools. This list defines such address pools which are distinguish by the key called "pool-name". o binding-info: A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses. o prefix-pools: If a server supports prefix delegation function, this container will be used to define the delegating router's prefix pools. o prefix-pool: Similar to server's address pools, a delegating router can also be configured with multiple prefix pools specified by a list called "prefix-pool". Cui, et al. Expires October 19, 2015 [Page 6] Internet-Draft YANG for DHCPv6 April 2015 o binding-info: A list records a binding information for each DHCPv6 requesting router that has already been configured IPv6 prefixes. o other-paras: This container defines extra configuration parameters provided by the DHCPv6 server apart from the address and prefix information. Such parameters may include DNS servers, SIP servers, SNTP servers, etc. o relay-opaque-paras: This container contains some opaque values in Relay Agent options that need to be configured on the server side only for value match. Such Relay Agent options include Interface- Id option, Remote-Id option and Subscriber-Id option. o packet-stats: A container presents the packet statistics related to the DHCPv6 server. 3.2. DHCPv6 Relay Tree Diagrams +--rw dhcpv6 +-- ... | +--rw relay {dhcpv6-relay}? +--rw relay-attributes | +--rw name string | +--rw enable boolean | +--rw dest-addrs* inet:ipv6-address | +--rw subscribers* [subscriber] | | +--rw subscriber uint8 | | +--rw subscriber-id string | +--rw remote-host* [entNum] | | +--rw ent-num uint8 | | +--rw remote-id string | +--ro vendor-info | | +--ro ent-num uint8 | | +--ro data* string | +--rw relay-interfaces | +--rw relay-if* [if-name] | +--rw if-name string | +--rw enable boolean | +--rw interface-id? string | +--rw next-entity* [dest-addr] | +--rw dest-addr inet:ipv6-address | +--rw available boolean | +--rw multicast boolean | +--rw server boolean | +--ro packet-stats | +--ro cli-packet-rvd-count uint32 | +--ro solicit-rvd-count uint32 Cui, et al. Expires October 19, 2015 [Page 7] Internet-Draft YANG for DHCPv6 April 2015 | +--ro request-rvd-count uint32 | +--ro renew-rvd-count uint32 | +--ro rebind-rvd-count uint32 | +--ro decline-rvd-count uint32 | +--ro release-rvd-count uint32 | +--ro info-req-rvd-count uint32 | +--ro relay-for-rvd-count uint32 | +--ro relay-rep-rvd-count uint32 | +--ro packet-to-cli-count uint32 | +--ro adver-sent-count uint32 | +--ro confirm-sent-count uint32 | +--ro reply-sent-count uint32 | +--ro reconfig-sent-count uint32 | +--ro relay-for-sent-count uint32 | +--ro relay-rep-sent-count uint32 +--ro relay-stats +--ro cli-packet-rvd-count uint32 +--ro relay-for-rvd-count uint32 +--ro relay-rep-rvd-count uint32 +--ro packet-to-cli-count uint32 +--ro relay-for-sent-count uint32 +--ro relay-rep-sent-count uint32 +--ro discarded-packet-count uint32 Introduction of important nodes: o relay-attributes: A container describes some basic attributes of the relay agent including some relay agent specific options data that need to be configured previously. Such options include Remote-Id option and Subscriber-Id option. o dest-addrs: Each DHCPv6 relay agent may be configured with a list of destination addresses. This node defines such a list of IPv6 addresses that may include unicast addresses, multicast addresses or other addresses. o relay-interfaces: It is a sub-container of "relayAttributes" that defines common configuration and state parameters in the interfaces of a DHCPv6 relay agent. o relay-if: A list describes a specific interface and its corresponding parameters. Here we use a string called "ifName" as the key of list. o next-entity: This node defines a list that is used to describe the next hop entity of this relay agent. Different entities are distinguished by their addresses. Cui, et al. Expires October 19, 2015 [Page 8] Internet-Draft YANG for DHCPv6 April 2015 o packet-stats: A container shows packet state information of a specific data communication. o relay-stats: The "relayStats" container records and presents the overall packet statistics of the relay agent. 3.3. DHCPv6 Client Tree Diagrams +--rw dhcpv6 +-- ... | +--rw client {dhcpv6-client}? +--rw client-interfaces +--rw client-if* [if-name] +--rw if-name string +--ro duid uint32 +--rw enable boolean +--rw cli-fqdn? string +--rw pd-function boolean +--rw rapid-commit boolean +--rw dual-stack boolean +--rw mo-tab | +--rw m-tab boolean | +--rw o-tab boolean +--ro vendor-info | +--ro ent-num uint8 | +--ro data* string +--ro identity-associations | +--ro identity-association* [iaid] | +--ro iaid uint8 | +--ro ia-type string | +--ro ipv6-addr* inet:ipv6-address | +--ro ipv6-prefix* inet:ipv6-prefix | +--ro prefix-length* uint8 | +--ro t1-time yang:date-and-time | +--ro t2-time yang:date-and-time | +--ro preferred-lifetime yang:timeticks | +--ro valid-lifetime yang:timeticks +--ro if-other-paras | +--ro dns-serv-addr* inet:ipv6-address | +--ro domain-search-list string | +--ro sip-serv-addr* inet:ipv6-address | +--ro sip-serv-domain-name-list string | +--ro uni-dhcpv6-serv-addr inet:ipv6-address | +--ro sntp-serv-addr* inet:ipv6-address | +--ro ntp-serv-paras | | +--ro ntp-serv-addr inet:ipv6-address | | +--ro ntp-serv-mul-addr inet:ipv6-address Cui, et al. Expires October 19, 2015 [Page 9] Internet-Draft YANG for DHCPv6 April 2015 | | +--ro ntp-serv-fqdn string | +--ro nis-paras | | +--ro nis-serv-addr inet:ipv6-address | | +--ro nis-cli-domain-name string | +--ro nisp-paras | +--ro nisp-serv-addr inet:ipv6-address | +--ro nisp-cli-domain-name string +--ro packet-stats +--ro solicit-count uint32 +--ro request-count uint32 +--ro renew-count uint32 +--ro rebind-count uint32 +--ro decline-count uint32 +--ro release-count uint32 +--ro info-req-count uint32 +--ro advertise-count uint32 +--ro confirm-count uint32 +--ro reply-count uint32 +--ro reconfigure-count uint32 Introduction of important nodes: o client-interfaces: A client may have several interfaces, it is more reasonable to configure and manage parameters on the interface-level. This container includes configuration and state data of a DHCPv6 client in a per-interface manner. o client-if: The list defines a specific client interface and its data. Different interfaces are distinguished by the "ifName" key which is a configurable string value. o duid: Each server and client has only one DUID (DHCP Unique Identifier). The DUID here will be carried in the Client ID option to identify a specific DHCPv6 client. o cli-fqdn: A DHCPv6 server needs to know the Fully Qualified Domain Name (FQDN) of the client to achieve the DNS update. o pd-function: Whether the client can act as a requesting router to request prefixes using prefix delegation ([RFC3633]). o rapid-commit: '1' indicates a client can initiate a Solicit-Reply message exchange by adding a Rapid Commit option in Solicit message. '0' means the client is not allowed to add a Rapid Commit option to request addresses in a two-message exchange pattern. o mo-tab: The management tab label indicates the operation mode of the DHCPv6 client. 'm'=1 and 'o'=1 indicate the client will use Cui, et al. Expires October 19, 2015 [Page 10] Internet-Draft YANG for DHCPv6 April 2015 DHCPv6 to obtain all the configuration data. 'm'=1 and 'o'=0 are a meaningless combination. 'm'=0 and 'o'=1 indicate the client will use stateless DHCPv6 to obtain configuration data apart from addresses/prefixes data. 'm'=0 and 'o'=0 represent the client will not use DHCPv6 but use SLAAC to achieve configuration. o identity-association: IA is a construct through which a server and a client can identify, group, and manage a set of related IPv6 addresses. The key of the "identity-association" list is a 4-byte number IAID defined in [RFC3315] . o if-other-paras: A client can obtain extra configuration data other than address and prefix information through DHCPv6. This container describes such data the client was configured. The potential configuration data may include DNS server addresses, SIP server domain names, etc. o packet-stats: A container records all the packet status information of a specific interface. 3.4. Notifications Mechanism for DHCPv6 Cui, et al. Expires October 19, 2015 [Page 11] Internet-Draft YANG for DHCPv6 April 2015 +--rw dhcpv6 +-- ... | +--n notifications +--n dhcpv6-server-event {dhcpv6-server}? | +--n addr-used-up | | +--ro serv-duid uint32 | | +--ro serv-name? string | | +--ro pool-name string | +--n prefix-used-up | | +--ro serv-duid uint32 | | +--ro serv-name? string | | +--ro pool-name string | +--n invalid-client-detected | +--ro cli-duid uint32 | +--ro description? string +--n dhcpv6-relay-event {dhcpv6-relay}? | +--n topo-changed | +--ro relay-if-name string | +--ro first-hop boolean | +--ro last-entity-addr inet:ipv6-address +--n dhcpv6-client-event {dhcpv6-client}? +--n invalid-ia-detected | +--ro cli-duid uint32 | +--ro iaid uint8 | +--ro serv-duid? uint32 | +--ro description? string +--n retransmission-failed | +--ro cli-duid uint32 | +--ro description enumeration +--n failed-status-turn-up +--ro cli-duid uint32 +--ro status-code enumeration Introduction of notifications: o addr-used-up: raised when the address pool has run out all its addresses. o prefix-used-up: raised when the prefix pool has run out all it prefixes. o invalid-client-detected: raised when the server has found a client which can be regarded as a potential attacker. Some description could also be included. o topo-changed: raised when the topology of the relay agent is changed. Cui, et al. Expires October 19, 2015 [Page 12] Internet-Draft YANG for DHCPv6 April 2015 o invalid-ia-detected: raised when the identity association of the client can be proved to be invalid. Possible condition includes duplicated address, illegal address, etc. o retransmission-failed: raised when the retransmission mechanism defined in [RFC3315] is failed. o failed-status-turn-up: raised when the client receives a message includes an unsuccessful Status Code option. 4. DHCPv6 YANG Model This module imports typedefs from [RFC6991]. file "ietf-dhcpv6@2015-04-13.yang" module ietf-dhcpv6 { namespace "urn:ietf:params:xml:ns:yang:dhcpv6"; prefix "dhcpv6"; import ietf-inet-types { prefix inet; revision-date "2013-07-15"; } import ietf-yang-types { prefix yang; revision-date "2013-07-15"; } organization "dhc wg"; contact "yong@csnet1.cs.tsinghua.edu.cn wangh13@mails.tsinghua.edu.cn lh.sunlinh@gmail.com Ted.Lemon@nominum.com "; description "This model defines a YANG data model that can be used to configure and manage DHCPv6 server, DHCPv6 relay and DHCPv6 client."; revision 2015-04-13 { description "Version02: Correct grammar errors."; } revision 2015-04-02 { description "Version01: Correct grammar errors, Reuse groupings, Update 'dhcpv6-realy' feature, Add notifications."; } revision 2015-03-04 { description "Version00: Initial revision."; } /* * Features Cui, et al. Expires October 19, 2015 [Page 13] Internet-Draft YANG for DHCPv6 April 2015 */ feature dhcpv6-server { description "Server in DHCPv6."; reference "RFC3315"; } feature dhcpv6-relay { description "Relay agent in DHCPv6."; reference "RFC3315"; } feature dhcpv6-client { description "Client in DHCPv6."; reference "RFC3315"; } /* * Grouping */ grouping vendor-info { container vendor-info { config "false"; leaf ent-num { mandatory true; type uint8; } leaf-list data { type string; } } } /* * Data Nodes */ container server { if-feature dhcpv6-server; container serv-attributes { Cui, et al. Expires October 19, 2015 [Page 14] Internet-Draft YANG for DHCPv6 April 2015 description "This container contains basic attributes of a DHCPv6 server such as DUID, server name and so on. Some optional functions that can be provided by the server is also included."; leaf name { mandatory true; type string; } leaf duid { config false; description "Each server and client has only one DUID (DHCP Unique Identifier). The DUID here identifies a unique DHCPv6 server for clients."; mandatory true; type uint32; } leaf enable { mandatory true; type boolean; } leaf description { type string; } leaf pd-function { description "Whether the server can act as a delegating router to perform prefix delegation ([RFC3633])."; mandatory true; type boolean; } leaf stateless-service { description "A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315])."; mandatory true; type boolean; } leaf rapid-commit { description "A boolean value specifies whether the server support client-server exchanges involving two messages defined in ([RFC3315])."; mandatory true; type boolean; } uses vendor-info; } container address-pools { description "A container describes the DHCPv6 server's address pools."; list address-pool { description "A DHCPv6 server can be configured with several address pools. This list defines such address pools which are distinguish by the key called 'pool-name'."; key pool-id; Cui, et al. Expires October 19, 2015 [Page 15] Internet-Draft YANG for DHCPv6 April 2015 leaf pool-id { mandatory true; type uint8; } leaf pool-prefix { mandatory true; type inet:ipv6-prefix; } leaf start-address { mandatory true; type inet:ipv6-address-no-zone; } leaf end-address { mandatory true; type inet:ipv6-address-no-zone; } leaf preferred-lifetime { mandatory true; type yang:timeticks; } leaf valid-lifetime { mandatory true; type yang:timeticks; } leaf used-ipv6-count { config "false"; mandatory true; type uint32; } leaf idle-ipv6-count { config "false"; mandatory true; type uint32; } } list binding-info { config "false"; description "A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses."; key cli-duid; leaf cli-duid { mandatory true; type uint32; } list cli-ia { key iaid; leaf ia-type { mandatory true; Cui, et al. Expires October 19, 2015 [Page 16] Internet-Draft YANG for DHCPv6 April 2015 type string; } leaf iaid { mandatory true; type uint8; } leaf-list cli-addr { type inet:ipv6-address; } leaf pool-id { type uint8; } } } } container prefix-pools { description "If a server supports prefix delegation function, this container will be used to define the delegating router's refix pools."; list prefix-pool { description "Similar to server's address pools, a delegating router can also be configured with multiple prefix pools specified by a list called 'prefix-pool'."; key pool-id; leaf pool-id { mandatory true; type uint8; } leaf prefix { mandatory true; type inet:ipv6-prefix; } leaf prefix-length { mandatory true; type uint8; } leaf preferred-lifetime { mandatory true; type yang:timeticks; } leaf valid-lifetime { mandatory true; type yang:timeticks; } } list binding-info { config "false"; description "A list records a binding information for each DHCPv6 client that has already been allocated IPv6 addresses."; Cui, et al. Expires October 19, 2015 [Page 17] Internet-Draft YANG for DHCPv6 April 2015 key cli-duid; leaf cli-duid { mandatory true; type uint32; } list cli-iapd { key iaid; leaf iaid { mandatory true; type uint8; } leaf-list cli-prefix { type inet:ipv6-prefix; } leaf-list cli-prefix-len { type uint8; } leaf pool-id { type uint8; } } } } container other-paras { description "This container defines extra configuration parameters provided by the DHCPv6 server apart from the address and prefix information. Such parameters may include DNS servers, SIP servers, SNTP servers, etc."; list dns-server { key dns-serv-id; leaf dns-serv-id { mandatory true; type uint8; } leaf dns-serv-addr { mandatory true; type inet:ipv6-address; } } leaf domain-search-list { mandatory true; type string; } list sip-server { key sip-serv-id; leaf sip-serv-id { mandatory true; type uint8; Cui, et al. Expires October 19, 2015 [Page 18] Internet-Draft YANG for DHCPv6 April 2015 } leaf sip-serv-domain-name { mandatory true; type string; } leaf sip-serv-addr { mandatory true; type inet:ipv6-address; } } list sntp-server { key sntp-serv-id; leaf sntp-serv-id { mandatory true; type uint8; } leaf sntp-serv-addr { mandatory true; type inet:ipv6-address; } } list ntp-serv-paras { key ntp-serv-id; leaf ntp-serv-id { mandatory true; type uint8; } leaf ntp-serv-addr { mandatory true; type inet:ipv6-address; } leaf ntp-serv-mul-addr { mandatory true; type inet:ipv6-address; } leaf ntp-serv-fqdn { mandatory true; type string; } } container nis-paras { leaf nis-serv-addr { mandatory true; type inet:ipv6-address; } list nis-cli-info { key cli-duid; leaf cli-duid { Cui, et al. Expires October 19, 2015 [Page 19] Internet-Draft YANG for DHCPv6 April 2015 mandatory true; type uint32; } leaf cli-domain-name { mandatory true; type string; } } } container nisp-paras { leaf nisp-serv-addr { mandatory true; type inet:ipv6-address; } list nisp-cli-info { key cli-duid; leaf cli-duid { mandatory true; type uint32; } leaf cli-domain-name { mandatory true; type string; } } } } container relay-opaque-paras { description "This container contains some opaque values in Relay Agent options that need to be configured on the server side only for value match. Such Relay Agent options include Interface-Id option, Remote-Id option and Subscriber-Id option."; list relays { key relay-name; leaf relay-name { mandatory true; type string; } list interface-info { key if-name; leaf if-name { mandatory true; type string; } leaf interface-id { mandatory true; type string; } Cui, et al. Expires October 19, 2015 [Page 20] Internet-Draft YANG for DHCPv6 April 2015 } list subscribers { key subscriber; leaf subscriber { mandatory true; type string; } leaf subscriber-id { mandatory true; type string; } } list remote-host { key ent-num; leaf ent-num { mandatory true; type uint8; } leaf remote-id { mandatory true; type string; } } } } container packet-stats { config "false"; description "A container presents the packet statistics related to the DHCPv6 server."; leaf solicit-count { mandatory true; type uint32; } leaf request-count { mandatory true; type uint32; } leaf renew-count { mandatory true; type uint32; } leaf rebind-count { mandatory true; type uint32; } leaf decline-count { mandatory true; type uint32; Cui, et al. Expires October 19, 2015 [Page 21] Internet-Draft YANG for DHCPv6 April 2015 } leaf release-count { mandatory true; type uint32; } leaf info-req-count { mandatory true; type uint32; } leaf advertise-count { mandatory true; type uint32; } leaf confirm-count { mandatory true; type uint32; } leaf reply-count { mandatory true; type uint32; } leaf reconfigure-count { mandatory true; type uint32; } leaf relay-forward-count { mandatory true; type uint32; } leaf relay-reply-count { mandatory true; type uint32; } } } container relay { if-feature dhcpv6-relay; container relay-attributes { description "A container describes some basic attributes of the relay agent including some relay agent specific options data that need to be configured previously. Such options include Remote-Id option and Subscriber-Id option."; leaf name { mandatory true; type string; } leaf enable { mandatory true; Cui, et al. Expires October 19, 2015 [Page 22] Internet-Draft YANG for DHCPv6 April 2015 type boolean; } leaf-list dest-addrs { description "Each DHCPv6 relay agent may be configured with a list of destination addresses. This node defines such a list of IPv6 addresses that may include unicast addresses, multicast addresses or other addresses."; type inet:ipv6-address; } list subscribers { key subscriber; leaf subscriber { mandatory true; type string; } leaf subscriber-id { mandatory true; type string; } } list remote-host { key ent-num; leaf ent-num { mandatory true; type uint8; } leaf remote-id { mandatory true; type string; } } uses vendor-info; container relay-interfaces { description "It is a container that defines common configuration and state parameters in the interfaces of a DHCPv6 relay agent. In this YANG data model for DHCPv6 relay agent, the parameters are configured in a per-interface manner."; list relay-if { description "A list describes a specific interface and its corresponding parameters. Here we use a string called 'ifName' as the key of list."; key if-name; leaf if-name { mandatory true; type string; } leaf enable { mandatory true; type boolean; } Cui, et al. Expires October 19, 2015 [Page 23] Internet-Draft YANG for DHCPv6 April 2015 leaf interface-id { type string; } list next-entity { description "This node defines a list that is used to describe the next hop entity of this relay distinguished by their addresses."; key dest-addr; leaf dest-addr { mandatory true; type inet:ipv6-address; } leaf available { mandatory true; type boolean; } leaf multicast { mandatory true; type boolean; } leaf server { mandatory true; type boolean; } container packet-stats { config "false"; description "A container shows packet state information of a specific interface. It is a sub-container of the 'relayInterfaces' container."; leaf cli-packet-rvd-count { mandatory true; type uint32; } leaf solicit-rvd-count { mandatory true; type uint32; } leaf request-rvd-count { mandatory true; type uint32; } leaf renew-rvd-count { mandatory true; type uint32; } leaf rebind-rvd-count { mandatory true; type uint32; } leaf decline-rvd-count { Cui, et al. Expires October 19, 2015 [Page 24] Internet-Draft YANG for DHCPv6 April 2015 mandatory true; type uint32; } leaf release-rvd-count { mandatory true; type uint32; } leaf info-req-rvd-count { mandatory true; type uint32; } leaf relay-for-rvd-count { mandatory true; type uint32; } leaf relay-rep-rvd-count { mandatory true; type uint32; } leaf pac-to-cli-count { mandatory true; type uint32; } leaf adver-sent-count { mandatory true; type uint32; } leaf confirm-sent-count { mandatory true; type uint32; } leaf reply-sent-count { mandatory true; type uint32; } leaf reconfig-sent-count { mandatory true; type uint32; } leaf relay-for-sent-count { mandatory true; type uint32; } leaf relay-rep-sent-count { mandatory true; type uint32; } } Cui, et al. Expires October 19, 2015 [Page 25] Internet-Draft YANG for DHCPv6 April 2015 } } } } container relay-stats { config "false"; description "The container records and presents the overall packet statistics of the relay agent."; leaf cli-packet-rvd-count { mandatory true; type uint32; } leaf relay-for-rvd-count { mandatory true; type uint32; } leaf relay-rep-rvd-count { mandatory true; type uint32; } leaf packet-to-cli-count { mandatory true; type uint32; } leaf relay-for-sent-count { mandatory true; type uint32; } leaf relay-rep-sent-count { mandatory true; type uint32; } leaf discarded-packet-count { mandatory true; type uint32; } } } container client { if-feature dhcpv6-client; container client-interfaces { description "A client may have several interfaces, it is more reasonable to configure and manage parameters on the interface-level. This container includes configuration and state data of a DHCPv6 client in a per-interface manner."; list client-if { description "The list defines a specific client interface and its data. Different Cui, et al. Expires October 19, 2015 [Page 26] Internet-Draft YANG for DHCPv6 April 2015 interfaces are distinguished by the key which is a configurable string value."; key if-name; leaf if-name { mandatory true; type string; } leaf duid { config "false"; description "Each server and client has only one DUID (DHCP Unique Identifier). The DUID here will be carried in the Client ID option to identify a specific DHCPv6 client."; mandatory true; type uint32; } leaf enable { mandatory true; type boolean; } leaf cli-fqdn { description "A DHCPv6 server needs to know the Fully Qualified Domain Name (FQDN) of the client to achieve the DNS update."; type string; } leaf pd-function { description "Whether the client can act as a requesting router to request prefixes using prefix delegation ([RFC3633])."; mandatory true; type boolean; } leaf rapid-commit { description "'1' indicates a client can initiate a Solicit-Reply message exchange by adding a Rapid Commit option in Solicit message. '0' means the client is not allowed to add a Rapid Commit option to request addresses in a two-message exchange pattern."; mandatory true; type boolean; } leaf dual-stack { mandatory true; type boolean; } container mo-tab { description "The management tab label indicates the operation mode of the DHCPv6 client. 'm'=1 and 'o'=1 indicate the client will use DHCPv6 to obtain all the configuration data. 'm'=1 and 'o'=0 are a meaningless combination. 'm'=0 and 'o'=1 indicate the client will use stateless DHCPv6 to obtain configuration data apart from addresses/prefixes Cui, et al. Expires October 19, 2015 [Page 27] Internet-Draft YANG for DHCPv6 April 2015 data. 'm'=0 and 'o'=0 represent the client will not use DHCPv6 but use SLAAC to achieve configuration."; leaf m-tab { mandatory true; type boolean; } leaf o-tab { mandatory true; type boolean; } } uses vendor-info; container identity-associations { config "false"; description "IA is a construct through which a server and a client can identify, group, and manage a set of related IPv6 addresses. The key of the list is a 4-byte number IAID defined in [RFC3315] ."; list identity-association { key iaid; leaf iaid { mandatory true; type uint8; } leaf ia-type { mandatory true; type string; } leaf-list ipv6-addr { type inet:ipv6-address; } leaf-list ipv6-prefix { type inet:ipv6-prefix; } leaf-list prefix-length { type uint8; } leaf t1-time { mandatory true; type yang:date-and-time; } leaf t2-time { mandatory true; type yang:date-and-time; } leaf preferred-lifetime { mandatory true; type yang:timeticks; } Cui, et al. Expires October 19, 2015 [Page 28] Internet-Draft YANG for DHCPv6 April 2015 leaf valid-lifetime { mandatory true; type yang:timeticks; } } } container if-other-paras { config "false"; description "A client can obtain extra configuration data other than address and prefix information through DHCPv6. This container describes such data the client was configured. The potential configuration data may include DNS server addresses, SIP server domain names, etc."; leaf-list dns-serv-addr { type inet:ipv6-address; } leaf domain-search-list { mandatory true; type string; } leaf-list sip-serv-addr { type inet:ipv6-address; } leaf sip-serv-domain-name-list { mandatory true; type string; } leaf uni-dhcpv6-serv-addr { mandatory true; type inet:ipv6-address; } leaf-list sntp-serv-addr { type inet:ipv6-address; } container ntp-serv-paras { leaf ntp-serv-addr { mandatory true; type inet:ipv6-address; } leaf ntp-serv-mul-addr { mandatory true; type inet:ipv6-address; } leaf ntp-serv-fqdn { mandatory true; type string; } } container nis-paras { Cui, et al. Expires October 19, 2015 [Page 29] Internet-Draft YANG for DHCPv6 April 2015 leaf nis-serv-addr { mandatory true; type inet:ipv6-address; } leaf nis-cli-domain-name { mandatory true; type string; } } container nisp-paras { leaf nisp-serv-addr { mandatory true; type inet:ipv6-address; } leaf nisp-cli-domain-name { mandatory true; type string; } } } container packet-stats { config "false"; description "A container records all the packet status information of a specific interface."; leaf solicit-count { mandatory true; type uint32; } leaf request-count { mandatory true; type uint32; } leaf renew-count { mandatory true; type uint32; } leaf rebind-count { mandatory true; type uint32; } leaf decline-count { mandatory true; type uint32; } leaf release-count { mandatory true; type uint32; } Cui, et al. Expires October 19, 2015 [Page 30] Internet-Draft YANG for DHCPv6 April 2015 leaf info-req-count { mandatory true; type uint32; } leaf advertise-count { mandatory true; type uint32; } leaf confirm-count { mandatory true; type uint32; } leaf reply-count { mandatory true; type uint32; } leaf reconfigure-count { mandatory true; type uint32; } } } } } /* * Notifications */ notification notifications { container dhcpv6-server-event { if-feature dhcpv6-server; container addr-used-up { leaf serv-duid { mandatory true; type uint32; } leaf serv-name { type string; } leaf pool-name { mandatory true; type string; } } container prefix-used-up { leaf serv-duid { mandatory true; Cui, et al. Expires October 19, 2015 [Page 31] Internet-Draft YANG for DHCPv6 April 2015 type uint32; } leaf serv-name { type string; } leaf pool-name { mandatory true; type string; } } container invalid-client-detected { leaf cli-duid { mandatory true; type uint32; } leaf description { type string; } } } container dhcpv6-relay-event { if-feature dhcpv6-relay; container topo-changed { leaf relay-if-name { mandatory true; type string; } leaf first-hop { mandatory true; type boolean; } leaf last-entity-addr { mandatory true; type inet:ipv6-address; } } } container dhcpv6-client-event { if-feature dhcpv6-client; container invalid-ia-detected { leaf cli-duid { mandatory true; type uint32; } leaf iaid { mandatory true; type uint8; } Cui, et al. Expires October 19, 2015 [Page 32] Internet-Draft YANG for DHCPv6 April 2015 leaf serv-duid { type uint32; } leaf description { type string; } } container retransmission-failed { leaf cli-duid { mandatory true; type uint32; } leaf description { mandatory true; type enumeration { enum "MRC failed"; enum "MRD failed"; } } } container failed-status-turn-up { leaf cli-duid { mandatory true; type uint32; } leaf status-code { mandatory true; type enumeration { enum "1" { description "UnspecFail"; } enum "2" { description "NoAddrAvail"; } enum "3" { description "NoBinding"; } enum "4" { description "NotOnLink"; } enum "5" { description "UseMulticast"; } } } } } } Cui, et al. Expires October 19, 2015 [Page 33] Internet-Draft YANG for DHCPv6 April 2015 } 5. Security Considerations (TBD) TBD 6. IANA Considerations (TBD) TBD 7. Acknowledgements (TBD) TBD 8. Normative References [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3315] Droms, R., Bound, J., Volz, B., Lemon, T., Perkins, C., and M. Carney, "Dynamic Host Configuration Protocol for IPv6 (DHCPv6)", RFC 3315, July 2003. [RFC3633] Troan, O. and R. Droms, "IPv6 Prefix Options for Dynamic Host Configuration Protocol (DHCP) version 6", RFC 3633, December 2003. [RFC6020] Bjorklund, M., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, October 2010. [RFC6087] Bierman, A., "Guidelines for Authors and Reviewers of YANG Data Model Documents", RFC 6087, January 2011. [RFC6991] Schoenwaelder, J., "Common YANG Data Types", RFC 6991, July 2013. Authors' Addresses Yong Cui Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6260-3059 Email: yong@csnet1.cs.tsinghua.edu.cn Cui, et al. Expires October 19, 2015 [Page 34] Internet-Draft YANG for DHCPv6 April 2015 Hao Wang Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6278-5822 Email: wangh13@mails.tsinghua.edu.cn Linhui Sun Tsinghua University Beijing 100084 P.R.China Phone: +86-10-6278-5822 Email: lh.sunlinh@gmail.com Ted Lemon Nominum, Inc. 950 Charter St. Redwood City, CA 94043 USA Email: Ted.Lemon@nominum.com Cui, et al. Expires October 19, 2015 [Page 35]