Deployment Guide

Neighbor Discovery Protocol (NDP)

The Dell Networking Operating System (OS) supports the network discovery protocol for IPv6.

The neighbor discovery protocol for IPv6 is dened in RFC 2461 as part of the Stateless Address Autoconguration protocol. It replaces the

Address Resolution Protocol used with IPv4. NDP denes mechanisms for solving the following problems:

• Router discovery: Hosts can locate routers residing on a link

• Prex discovery: Hosts can discover address prexes for the link

• Parameter discovery

• Address autoconguration — conguration of addresses for an interface

• Address resolution — mapping from IP address to link-layer address

• Next-hop determination

• Neighbor unreachability detection (NUD): Determine that a neighbor is no longer reachable on the link.

• Duplicate address detection (DAD): Allow a node to check whether a proposed address is already in use.

• Redirect: The router can inform a node about a better rst-hop.

NDP uses the following ve ICMPv6 packet types in its implementation:

• Router Solicitation

• Router Advertisement

• Neighbor Solicitation

• Neighbor Advertisement

• Redirect

Topics:

• clear ipv6 neighbors

• ipv6 neighbor

• show ipv6 neighbors

clear ipv6 neighbors

Delete all entries in the IPv6 neighbor discovery cache or neighbors of a specic interface. Static entries are not removed using this

command.

Syntax

clear ipv6 neighbors [ipv6-address] [interface]

Parameters

ipv6-address Enter the IPv6 address of the neighbor in the x:x:x:x::x format to remove a specic IPv6

neighbor.

NOTE: The :: notation species successive hexadecimal elds of zero.

interface interface To remove all neighbor entries learned on a specic interface, enter the keyword

interface then the interface type and slot/port or number information of the

interface:

888 Neighbor Discovery Protocol (NDP)