The Neighbor Discovery Protocol (NDP) object {{bibref|RFC4861}}. This object applies only to IPv6. It contains an {{object|InterfaceSetting}} table that defines the NDP configuration for individual IP interfaces. Enables or disables Neighbor Discovery. {{numentries}} Per-interface Neighbor Discovery Protocol (NDP) configuration {{bibref|RFC4861}}. For enabled table entries, if {{param|Interface}} is not a valid reference to an IPv6-capable interface (that is attached to the IPv6 stack), then the table entry is inoperable and the CPE MUST set {{param|Status}} to {{enum|Error_Misconfigured|Status}}. Note: The {{object}} table includes a unique key parameter that is a strong reference. If a strongly referenced object is deleted, the CPE will set the referencing parameter to {{empty}}. However, doing so under these circumstances might cause the updated {{object}} row to then violate the table's unique key constraint; if this occurs, the CPE MUST set {{param|Status}} to {{enum|Error_Misconfigured|Status}} and disable the offending {{object}} row. Enables or disables this {{object}} entry. The status of this entry. {{enum}} The {{enum|Error_Misconfigured}} value indicates that a necessary configuration value is undefined or invalid. The {{enum|Error}} value MAY be used by the CPE to indicate a locally defined error condition. {{datatype|expand}} This is the IP interface associated with this {{object}} entry. The number of consecutive Neighbor Solicitation messages sent while performing Duplicate Address Detection on a tentative address (see{{bibref|RFC4862|5.1}}). A value of zero indicates that Duplicate Address Detection is not performed on tentative addresses. A value of one indicates a single transmission with no follow-up retransmissions. If the value is greater than 1, {{param|RetransTimer}} defines the delay between consecutive messages. Retransmission interval in {{units}}, as defined in {{bibref|RFC4861}}. For auto-configuration purposes, {{param}} specifies the delay between consecutive Neighbor Solicitation transmissions performed during Duplicate Address Detection (DAD) {{bibref|RFC4862|Section 5.4}}, as well as the time a node waits after sending the last Neighbor Solicitation before ending the DAD process. Retransmission interval in {{units}}, as defined in {{bibref|RFC4861|6.3.7}}. For auto-configuration purposes, {{param}} specifies the delay between consecutive Router Solicitation transmissions. Maximum Number of Router Solicitation Transmission messages, as defined in {{bibref|RFC4861}}. For auto-configuration purposes {{param}} specifies the Maximum Number of Router Solicitation Transmission messages to help the host to conclude that there are no routers on the link. Enables or disables Neighbor Unreachability Detection (NUD) {{bibref|RFC4861|Section 7}}. Enables or disables Router Solicitation (RS) on {{param|Interface}} {{bibref|RFC4861|Section 4.1}}.