]> YANG Data Model for IPv6 Neighbor Discovery China Telecom
Guangzhou China zhangf52@chinatelecom.cn
China Telecom
Guangzhou China zhuyq8@chinatelecom.cn
Huawei
China lana.wubo@huawei.com
China Telecom
Guangzhou China hujy5@chinatelecom.cn
Internet Area 6MAN This document defines a YANG data model to configure and manage IPv6 Neighbor Discovery (ND) and related functions, including IPv6 address resolution, redirect function, proxy Neighbor Advertisement, Neighbor Unreachability Detection (NUD), Duplicate Address Detection (DAD), and Enhanced Duplicate Address Detection.
Introduction This document defines a YANG data model "ietf-ipv6-nd" to configure and manage IPv6 Neighbor Discovery (ND) and related functions. Basic neighbor management functionality is supported by the "ietf-ip" YANG data model , and extends the basic ARP YANG functionality to cover optional ARP features and related statistics, which applies only to IPv4. Thus, an extension for IPv6 is required to maintain the IPv6 Neighbor Cache entries. specifies the Neighbor Discovery protocol for IPv6, while specifies IPv6 Stateless Address Autoconfiguration (SLAAC). This document covers IPv6 address resolution, redirect function, proxy Neighbor Advertisement, and NUD, as defined in , as well as DAD, as defined in , and Enhanced DAD, as deined in . Other functions defined in these RFCs are covered by existing YANG data models. Specifically, Router and Prefix Discovery are covered by submodule "ietf-ipv6-router-advertisements" , and static Neighbor Cache entries and Stateless Address Autoconfiguration are covered by module "ietf-ip" . Neighbor Discovery Optimization for 6LoWPANs and other related extensions, such as those specified in , , and , are out of scope of this document.
Terminology The following terms are defined in :
  • configuration
  • system state
  • operational state
The following terms are defined in :
  • augment
  • container
  • data model
  • data node
  • leaf
  • list
  • module
  • schema tree
The following terms are defined in :
  • Neighbor Discovery
  • Neighbor Advertisement
  • proxy Neighbor Advertisement
  • Neighbor Unreachability Detection
The following terms are defined in :
  • Duplicate Address Detection
  • Stateless Address Autoconfiguration
The following term is defined in :
  • Enhanced Duplicate Address Detection
Tree Diagrams Tree diagrams used in this document follow the notation defined in .
Design of the Data Model The YANG data model for IPv6 ND augments the "ietf-ip" to provide per-interface configuration and management of IPv6 address resolution and redirect functions based on the IPv6 ND protocol, as well as other related functions, including proxy Neighbor Advertisement, NUD, DAD, and Enhanced DAD. Note that the features related to ICMP Router and Prefix Discovery are out of scope of this module, since they have already been defined in the submodule "ietf-ipv6-router-advertisements" . Static Neighbor Cache entries and SLAAC are also out of scope, as they are covered by "ietf-ip" .
IPv6 Address Resolution and Redirect Function The data model augments the "/if:interfaces/if:interface/ip:ipv6" path defined in the "ietf-ip" module for the IPv6 ND protocol . The "retrans-timer" leaf defines the interval of retransmitting Neighbor Solicitation messages when a node tries to learn the link-layer address of another node. The "redirect" leaf enables the sending of Redirect messages. The default behavior of IPv6 Redirects may vary depending on the deployment scenario. specifies the expected Redirect behavior, while recommends disabling Redirects by default on routers intended for core networks, but allows them to be enabled by default on routers intended to support hosts on edge networks. Therefore, this model does not specify a default value for the "redirect" leaf, leaving the default behavior to the implementation and deployment requirements. The "statistics" container defines a collection of per-interface operational statistics for each type of IPv6 ND message.
Neighbor Unreachability Detection The "reachable-time" leaf defines the time to confirm a neighbor's reachability for NUD. A neighbor's state changes from REACHABLE to STALE when there is no other reachability confirmation from the neighbor within the "reachable-time". The "retrans-timer" leaf also indicates the interval for retransmitting Neighbor Solicitation messages used by NUD.
Proxy Neighbor Advertisement The "proxy-na" leaf augmenting "ietf-ip" defines the configuration of proxy Neighbor Advertisements , which indicate that a router is willing to accept packets not explicitly addressed to itself. After receiving a Neighbor Solicitation message whose destination address is not its own IPv6 address, a proxy router replies to the source with a Neighbor Advertisement message carrying its own link-layer address and the IPv6 address of the original destination.
Duplicate Address Detection The "dup-addr-detect-transmits" leaf, as defined in "ietf-ip" , indicates the number of consecutive Neighbor Solicitation messages sent while performing Duplicate Address Detection (DAD) . The value of "dup-addr-detect-transmits" can be set to 0 to disable DAD. The "retrans-timer" leaf also indicates the interval for retransmitting Neighbor Solicitation messages during DAD. The "enhanced-dad" container augmenting "ietf-ip" defines the configuration for Enhanced DAD , which is used to automatically detect the looped-back IPv6 ND messages used in DAD. The "auto-resolve" leaf enables automated action when a genuine duplicate is detected by Enhanced DAD. Section 5 of describes a use case in which a trusted router serves untrusted IPv6 host nodes. In such a scenario, automated actions may include logging a system management message, dropping the received ND message, or blocking the node associated with the duplicate NS (DAD) or NA message. The specific actions, including the scope and duration of any blocking and the procedure for restoring service, are implementation-specific and are out of scope of this model.
IPv6 Neighbor Discovery Data Model This document defines the YANG module "ietf-ipv6-nd", which has the following structure.
IPv6 Neighbor Discovery YANG Module This section presents the YANG module of IPv6 Neighbor Discovery defined in this document. This module imports modules from Common YANG Data Types , A YANG Data Model for Interface Management , and A YANG Data Model for IP Management . WG List: 6MAN Author: Fan Zhang Author: Yongqing Zhu Author: Bo Wu Author: Jiayuan Hu "; description "This YANG module defines a YANG data model to configure and manage IPv6 Neighbor Discovery (ND) and related functions, including IPv6 address resolution, redirect, proxy Neighbor Advertisement, Neighbor Unreachability Detection (NUD), Duplicate Address Detection (DAD), and Enhanced DAD. Copyright (c) 2026 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 Revised 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). All revisions of IETF and IANA published modules can be found at the YANG Parameters registry group (https://www.iana.org/assignments/yang-parameters). This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; // RFC Ed: replace '2026-11-02' with the module publication date // the format is (YYYY-MM-DD) // replace XXXX with actual RFC number and remove // this note revision 2026-11-02 { description "Initial version."; reference "RFC XXXX: YANG Data Model for IPv6 Neighbor Discovery"; } /* Features */ feature auto-resolve { description "Indicates support for automated action when a duplicate is detected by Enhanced DAD."; } /* Groupings */ grouping nd-basic-statistics { description "Grouping for basic statistics for IPv6 ND messages."; leaf in-pkts { type yang:counter64; description "The total number of packets received."; } leaf out-pkts { type yang:counter64; description "The total number of packets transmitted."; } leaf drop-pkts { type yang:counter64; description "The total number of packets discarded."; } } grouping nd-unicast-multicast-statistics { description "Grouping for statistics for IPv6 ND messages categorized by unicast and multicast."; leaf in-unicast-pkts { type yang:counter64; description "The total number of packets received with the destination address as a unicast address."; } leaf in-multicast-pkts { type yang:counter64; description "The total number of packets received with the destination address as a multicast address."; } leaf out-unicast-pkts { type yang:counter64; description "The total number of packets transmitted with the destination address as a unicast address."; } leaf out-multicast-pkts { type yang:counter64; description "The total number of packets transmitted with the destination address as a multicast address."; } } grouping nd-drop-statistics { description "Grouping for statistics for IPv6 ND messages discarded by reason."; leaf drop-bad-code-pkts { type yang:counter64; description "The total number of packets discarded due to invalid code."; } leaf drop-bad-hoplimit-pkts { type yang:counter64; description "The total number of packets discarded due to invalid hop limits."; } leaf drop-bad-len-pkts { type yang:counter64; description "The total number of packets discarded due to invalid length."; } leaf drop-bad-option-pkts { type yang:counter64; description "The total number of packets discarded due to invalid option."; } leaf drop-checksum-err-pkts { type yang:counter64; description "The total number of packets discarded due to checksum errors."; } leaf drop-fragmented-pkts { type yang:counter64; description "The total number of packets discarded due to fragmentation."; } } /* Data nodes */ augment "/if:interfaces/if:interface/ip:ipv6" { description "Augments interface configuration and state data with parameters of IPv6 ND."; container nd { description "Parameters of IPv6 ND."; leaf reachable-time { type uint32; units "milliseconds"; default "30000"; description "The time to confirm a neighbor's reachability for NUD."; reference "RFC4861: Neighbor Discovery for IP version 6 (IPv6) Section 6.3.2 - BaseReachableTime"; } leaf retrans-timer { type uint32 { range "1..max"; } units "milliseconds"; default "1000"; description "The interval of retransmitting Neighbor Solicitations to a neighbor for address resolution, NUD, or DAD."; reference "RFC4861: Neighbor Discovery for IP version 6 (IPv6) Section 6.3.2 - RetransTimer"; } leaf redirect { type boolean; default "false"; description "Controls whether the sending of ICMP Redirect messages on the interface is enabled or disabled. true - Sending of ICMP Redirect messages is enabled, false - Sending of ICMP Redirect messages is disabled. The default behaviour is implementation-specific and may depend on the deployment scenario. A deviation could be used to specify a implementation-specific default."; reference "RFC4861: Neighbor Discovery for IP version 6 (IPv6) Section 8 RFC8504: IPv6 Node Requirements Section 5.4"; } leaf proxy-na { type boolean; default "false"; description "Controls whether the router proxies for one or more other nodes by sending proxy Neighbor Advertisement. true - Proxy NA is enabled, false - Proxy NA is disabled."; reference "RFC4861: Neighbor Discovery for IP version 6 (IPv6) Section 7.2.8"; } container enhanced-dad { description "Parameters of Enhanced DAD algorithm."; leaf enable { type boolean; default "false"; description "Controls whether the Enhanced DAD algorithm is enabled or disabled."; reference "RFC7527: Enhanced Duplicate Address Detection Section 4"; } leaf auto-resolve { when "../enable = 'true'"; if-feature auto-resolve; type boolean; default "false"; description "Controls whether the automated action is enabled when detecting duplicates."; reference "RFC7527: Enhanced Duplicate Address Detection Section 5"; } reference "RFC7527: Enhanced Duplicate Address Detection"; } container statistics { config false; description "A collection of interface-related statistics about IPv6 ND messages. For all IPv6 ND interface counters, discontinuities in the value can occur at re-initialization of the management system and at other times as indicated by the value of '../../statistics/discontinuity-time' in the ietf-interfaces YANG module."; container neighbor-solicitation { description "Statistics for Neighbor Solicitation packets."; uses nd-basic-statistics; uses nd-unicast-multicast-statistics; uses nd-drop-statistics; leaf out-nud-pkts { type yang:counter64; description "The total number of NS packets transmitted for NUD."; } } container neighbor-advertisement { description "Statistics for Neighbor Advertisement packets."; uses nd-basic-statistics; uses nd-unicast-multicast-statistics; uses nd-drop-statistics; leaf in-solicited-pkts { type yang:counter64; description "The total number of solicited NA packets received."; } leaf in-unsolicited-pkts { type yang:counter64; description "The total number of unsolicited NA packets received."; } leaf in-override-pkts { type yang:counter64; description "The total number of override NA packets received."; } leaf in-nonoverride-pkts { type yang:counter64; description "The total number of non-override NA packets received."; } leaf out-solicited-pkts { type yang:counter64; description "The total number of solicited NA packets transmitted."; } leaf out-unsolicited-pkts { type yang:counter64; description "The total number of unsolicited NA packets transmitted."; } leaf out-override-pkts { type yang:counter64; description "The total number of override NA packets transmitted."; } leaf out-nonoverride-pkts { type yang:counter64; description "The total number of non-override NA packets transmitted."; } } container router-solicitation { description "Statistics for Router Solicitation packets."; uses nd-basic-statistics; uses nd-unicast-multicast-statistics; uses nd-drop-statistics; } container router-advertisement { description "Statistics for Router Advertisement packets."; uses nd-basic-statistics; uses nd-unicast-multicast-statistics; uses nd-drop-statistics; } container redirect { description "Statistics for Redirect packets."; uses nd-basic-statistics; uses nd-drop-statistics; } } } } augment "/if:interfaces/if:interface/ip:ipv6/ip:neighbor" { description "Augments IPv6 neighbor list with parameters of IPv6 address resolution based on IPv6 ND."; leaf age { when "../ip:origin = 'dynamic'"; type uint32; units "seconds"; config false; description "The time that has passed since receipt of the last reachability confirmation for the neighbor. This leaf is present only for dynamic neighbor entries."; reference "RFC4861: Neighbor Discovery for IP version 6 (IPv6) Section 7.3.3"; } } } ]]>
IANA Considerations IANA is requested to register the following URI in the "ns" registry within the "IETF XML Registry" group : IANA is requested to register the following YANG module in the "YANG Module Names" registry within the "YANG Parameters" registry group.
Security Considerations This section is modeled after the template described in Section 3.7.1 of . The "ietf-ipv6-nd" YANG module defines a data model that is designed to be accessed via YANG-based management protocols, such as the Network Configuration Protocol (NETCONF) and RESTCONF . These YANG-based management protocols (1) have to use a secure transport layer (e.g., Secure Shell (SSH) , TLS , and QUIC ) and (2) have to use mutual authentication. The Network Configuration Access Control Model (NACM) provides the means to restrict access for particular NETCONF or RESTCONF users to a preconfigured subset of all available NETCONF or RESTCONF protocol operations and content. There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., "config true", which is the default). All writable data nodes are likely to be sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) and delete operations to these data nodes without proper protection or authentication can have a negative effect on network operations. The following subtrees and data nodes have particular sensitivities/vulnerabilities: * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:reachable-time This leaf is used to consider a neighbor reachable since the last confirmation of reachability. An excessively large value could prolong the use of stale or spoofed Neighbor Cache entries, while an excessively small value could cause unnecessarily frequent NUDs. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:retrans-timer This leaf is used to set the interval of retransmitting Neighbor Solicitations. An excessively small value could cause excessive NS traffic and increase network load, potentially resulting in denial of service. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:redirect This leaf is used to enable the sending of Redirect messages on an interface. Unauthorized or mistaken changes to this leaf could cause traffic to be misdirected, potentially resulting in traffic hijacking, denial of service, or on-path attacks. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:proxy-na This leaf is used to enable proxy Neighbor Advertisement on an interface. Unauthorized or mistaken changes to this leaf could cause traffic to be misdirected, potentially enabling traffic interception or denial of service. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:enhanced-dad/v6nd:enable This leaf is used to enable Enhanced DAD algorithm on an interface. Unauthorized or mistaken changes to this leaf could disable Enhanced DAD, causing looped back NS (DAD) messages to be incorrectly interpreted as indicating duplicate addresses and potentially preventing legitimate IPv6 addresses from being configured. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:enhanced-dad/v6nd:auto-resolve This leaf is used to enable the automated resolution when detecting duplicates by the Enhanced DAD algorithm on an interface, which could trigger automated actions that affect legitimate hosts or cause ND messages to be dropped, potentially resulting in denial of service. Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. Specifically, the following subtrees and data nodes have particular sensitivities/ vulnerabilities: * /if:interfaces/if:interface/ip:ipv6/ip:neighbor/v6nd:age Unauthorized access to this node may disclose information about IPv6 neighbor reachability and behavior patterns on the network. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:redirect * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:proxy-na * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:enhanced-dad Unauthorized access to these nodes may disclose behavior patterns and security-related configuration of IPv6 Neighbor Discovery functions. * /if:interfaces/if:interface/ip:ipv6/v6nd:nd/v6nd:statistics Unauthorized access to this subtree may disclose information about neighbor activity and behavior patterns, including probing, packet drops and redirect.
Acknowledgments The authors would like to thank Bin Han, Acee Lindem, Jen Linkova, Éric Vyncke, Changwang Lin, and many others for their helpful comments and suggestions. Thanks to Ebben Aries for the YANG Doctors review. Thanks to Yaroslav Rosomakho for the SECDIR review. Thanks to Carlos Pignataro for the INTDIR review. Thanks to Roni Even for the GENART review. Thanks to Tina Tsou for the OPSDIR review.
References Normative References Informative References
Example Proxy Neighbor Advertisement, Redirect, NUD, and DAD Configuration This example illustrates the configuration of enabling proxy Neighbor Advertisement, Redirect, NUD, DAD, and Enhanced DAD on interface eth0 with setting the "dup-addr-detect-transmits" leaf to 2, the "reachable-time" leaf to 40,000 milliseconds, and the "retrans-timer" leaf to 2,000 milliseconds, using the ietf-interfaces module , the ietf-ip module , and the IPv6 ND module. eth0 ianaift:ethernetCsmacd 2 40000 2000 true true true true ]]> The following is the same example using JSON format.
Coverage of IPv6 ND Functions and Parameters in YANG Modules This appendix summarizes the functional elements related to the IPv6 ND protocol and identifies whether they are covered by existing IETF YANG modules or defined in this document. The table below maps the relevant RFCs, functions or parameters, the corresponding YANG modules, and their specific data paths. The functions are defined in (Neighbor Discovery for IP version 6 (IPv6)), (IPv6 Stateless Address Autoconfiguration), and (Enhanced Duplicate Address Detection). The parameters are defined in Section 6.2.1 and 6.3.2 of , Section 5.1 of , and Section 3.4 of . Coverage of IPv6 ND Functions and Parameters in YANG Modules
RFC
(Section)		 Function/Parameter Covered by Path
4861
s5.1		 Neighbor Cache ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:neighbor
4862
s5.1		 Prefix List
(AdvPrefixList)		 ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:prefix-list
4861
s6.2.1		 IsRouter ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:forwarding
4861
s6.2.1		 AdvSendAdvertisements ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:ipv6-router
-advertisements
4861
s6.2.1		 MaxRtrAdvInterval ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:max-rtr
-adv-interval
4861
s6.2.1		 MinRtrAdvInterval ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:min-rtr
-adv-interval
4861
s6.2.1		 AdvManagedFlag ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6/
v6ur:managed-flag
4861
s6.2.1		 AdvOtherConfigFlag ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:other-
config-flag
4861
s6.2.1		 AdvLinkMTU ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:link-mtu
4861
s6.2.1		 AdvReachableTime ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:reachable-time
4861
s6.2.1		 AdvRetransTimer ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:retrans-timer
4861
s6.2.1		 AdvCurHopLimit ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:cur-hop-limit
4861
s6.2.1		 AdvDefaultLifetime ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:default-lifetime
4861
s6.2.1		 AdvPrefixList/
AdvValidLifetime		 ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:prefix-list
/v6ur:prefix
/v6ur:control-adv
-prefixes
/v6ur:advertise
/v6ur:valid
-lifetime
4861
s6.2.1		 AdvPrefixList/
AdvOnLinkFlag		 ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:prefix-list
/v6ur:prefix
/v6ur:control-adv
-prefixes
/v6ur:advertise/
v6ur:on-link-flag
4861
s6.2.1		 AdvPrefixList/
AdvPreferredLifetime		 ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:prefix-list
/v6ur:prefix
/v6ur:control-adv
-prefixes
/v6ur:advertise
/v6ur:preferred
-lifetime
4861
s6.2.1		 AdvPrefixList/
AdvAutonomousFlag		 ietf-ipv6-
router-
advertisements		 /if:interfaces
/if:interface
/ip:ipv6
/v6ur:prefix-list
/v6ur:prefix
/v6ur:control-adv
-prefixes
/v6ur:advertise
/v6ur:autonomous
-flag
4861
s6.3.2		 LinkMTU ietf-ip /if:interfaces
/if:interface
/ip:ipv6/ip:mtu
4861
s6.3.2		 CurHopLimit - -
4861
s6.3.2		 BaseReachableTime ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd
/v6nd:reachable
-time
4861
s6.3.2		 ReachableTime - -
4861
s6.3.2 /4862
s5.1		 RetransTimer ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd
/v6nd:retrans
-timer
4861
s7.2.8		 Proxy Neighbor
Advertisements		 ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd
/v6nd:proxy-na
4861
s8		 Redirect ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd
/v6nd:redirect
4862
s5.1		 DupAddrDetectTransmits ietf-ip /if:interfaces
/if:interface
/ip:ipv6/ip:dup
-addr-detect
-transmits
4862
s5.5		 Creation of Global
Addresses		 ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:autoconf
/ip:create-
global-
addresses
8981
s3.4		 Creation of Temporary
Addresses		 ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:autoconf
/ip:create-
temporary-
addresses
8981
s3.4		 TEMP_VALID_LIFETIME ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:autoconf
/ip:temporary-
valid-lifetime
8981
s3.4		 TEMP_PREFERRED_
LIFETIME		 ietf-ip /if:interfaces
/if:interface
/ip:ipv6
/ip:autoconf
/ip:temporary-
preferred-
lifetime
7527
s4		 Enhanced Duplicate
Address Detection		 ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd/
v6nd:enhanced-dad
7527
s5		 Automated Resolving
of Duplicates		 ietf-ipv6-nd /if:interfaces
/if:interface
/ip:ipv6/v6nd:nd/
v6nd:auto-resolve
Contributors Huawei
China hanbin3@huawei.com