Users Guide

Version Description
9.8(0.0P5) Introduced on the S4048-ON.
9.8(0.0P2) Introduced on the S3048-ON.
9.7(0.0) Added support for VRF. Introduced on the S6000-ON.
9.2(1.0) Introduced on the Z9500.
8.3.19.0 Introduced on the S4820T.
8.3.11.1 Introduced on the Z9000.
8.3.7.1 Introduced on the S4810.
Usage Information
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. It denes mechanisms for solving problems,
such as:
• 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.
Use the ipv6 neighbor command to manually congure the IPv6 address of a neighbor to be discovered by the
switch.
show ipv6 neighbors
Display IPv6 discovery information. Entering the command without options shows all IPv6 neighbor addresses stored on the control
processor (CP).
Syntax
show ipv6 neighbors [vrf vrf-name] [ipv6-address| interface interface]
Parameters
vrf vrf-name (OPTIONAL) Enter the keyword vrf and the name of the VRF to display the neighbors
corresponding to that VRF.
NOTE: If you do not specify this option, neighbors corresponding to the default
VRF are displayed.
ipv6-address Enter the IPv6 address of the neighbor in the x:x:x:x::x format.
NOTE: The :: notation species successive hexadecimal elds of zero.
interface interface Enter the keyword interface then the interface type and slot/port or number
information:
Neighbor Discovery Protocol (NDP) 1217