# nd

> IPv6 Neighbor Discovery (ND) protocol is configured.

-----------

## ipv6/nd 
**Type:** Directory

IPv6 Neighbor Discovery (ND) protocol is configured.

<ArgTable c1="Flag" c2="Name" c3="Description">
<ArgTableRow arg="X" typ="disabled">disabled</ArgTableRow>
<ArgTableRow arg="I" typ="invalid">invalid</ArgTableRow>
<ArgTableRow arg="*" typ="default">default</ArgTableRow>
</ArgTable>

<ArgTable c1="Argument" c2="Type" c3="Description">
<ArgTableRow arg="interface" typ="iface_enum { all:0 }">
Interface on which to run neighbor discovery.
-all - run ND on all running interfaces.
</ArgTableRow>
<ArgTableRow arg="ra-interval" typ="super { min: time [3 .. 1250]
, [max] -time [4 .. 1800]
 }">Minimum and maximum interval allowed between unsolicited multicast router advertisements from the interface.</ArgTableRow>
<ArgTableRow arg="ra-delay" typ="time">Minimum time between multicast router advertisements from the interface.</ArgTableRow>
<ArgTableRow arg="mtu" typ="alt { special: enum (unspecified) { unspecified:0 }
, value: num
 }">
The MTU option in router advertisements ensures that all nodes on a link use the same MTU value when the link MTU is not well known.
- **unspecified** - do not send the MTU option.
</ArgTableRow>
<ArgTableRow arg="reachable-time" typ="alt { special: enum (unspecified) { unspecified:0 }
, value: time [ .. 3600]
 }">Time that RouterOS assumes a neighbor is reachable after receiving a reachability confirmation. Used by Neighbor Unreachability Detection (see Section 7.3 of [RFC 4861](https://tools.ietf.org/html/rfc4861)).</ArgTableRow>
<ArgTableRow arg="retransmit-interval" typ="alt { special: enum (unspecified) { unspecified:0 }
, value: time
 }">Time between retransmitted Neighbor Solicitation messages. Used by address resolution and Neighbor Unreachability Detection (see Sections 7.2 and 7.3 of [RFC 4861](https://tools.ietf.org/html/rfc4861)).</ArgTableRow>
<ArgTableRow arg="ra-lifetime" typ="alt { special: enum (none) { none:0 }
, value: time [ .. 9000]
 }">Set the RA lifetime. A lifetime of 0 indicates that this router is not a default router. See Section 6.2.1 of [RFC 4861](https://tools.ietf.org/html/rfc4861).</ArgTableRow>
<ArgTableRow arg="ra-preference" typ="enum (low | medium | high)">Specify the router preference communicated to IPv6 hosts in router advertisements. The `ra-preference` value helps hosts select a default router to reach a remote destination.</ArgTableRow>
<ArgTableRow arg="hop-limit" typ="alt { special: enum (unspecified) { unspecified:0 }
, value: num [ .. 255]
 }">Default value placed in the Hop Count field of the IPv6 header for outgoing unicast packets.</ArgTableRow>
<ArgTableRow arg="advertise-mac-address" typ="bool">When set, include the outgoing interface's link-layer address in router advertisements.</ArgTableRow>
<ArgTableRow arg="advertise-dns" typ="enum (no | yes | self)">
Redistribute DNS server information using RADVD.

- `no` - do not advertise DNS servers.
- `yes` - advertise DNS servers installed on the router.
- `self` - advertise the interface link-local address as the DNS service provider.
</ArgTableRow>
<ArgTableRow arg="managed-address-configuration" typ="bool">Indicates whether hosts should use stateful autoconfiguration (DHCPv6) to obtain addresses. See [RFC 3315](https://tools.ietf.org/html/rfc3315).</ArgTableRow>
<ArgTableRow arg="other-configuration" typ="bool">Indicates whether hosts should use stateful autoconfiguration to obtain additional information, excluding addresses. See [RFC 3315](https://tools.ietf.org/html/rfc3315).</ArgTableRow>
<ArgTableRow arg="dns" typ="multi { address: address (flags=6)
 }">Specify one or more IPv6 addresses that hosts receive for DNS server configuration.</ArgTableRow>
<ArgTableRow arg="pref64" typ="object { pref64: ip6Prefix
 }">Specify one or more IPv6 prefixes within /32, /40, /48, /56, /64, or /96 subnets that hosts receive as NAT64 prefixes.</ArgTableRow>
</ArgTable>