9.3 IPv6 Neighbor Discovery
Which two ICMPv6 messages are used in to determine the MAC address of a known IPv6 address? - neighbor advertisement - neighbor solicitation - router advertisement - router solicitation
- neighbor advertisement - neighbor solicitation
To what type of address are ICMPv6 neighbor solicitation messages sent? - unicast - multicast - broadcast
- multicast
Which two ICMPv6 messages are used in SLAAC? - neighbor advertisement - neighbor solicitation - router advertisement - router solicitation
- router advertisement - router solicitation
Neighbor Disocvery (ND/NDP)
IPv6 Neighbor Discovery protocol is sometimes referred to as ND or NDP. In this course, we will refer to it as ND. ND provides address resolution, router discovery, and redirection services for IPv6 using ICMPv6. ICMPv6 ND uses five ICMPv6 messages to perform these services: 1) Neighbor Solicitation messages 2) Neighbor Advertisement messages 3) Router Solicitation messages 4) Router Advertisement messages 5) Redirect Message IPv6 ND is defined in the IETF RFC 4861.
The fifth ICMPv6 ND message is a redirect message which is used for
better next-hop selection.
Neighbor Solicitation and Neighbor Advertisement messages are used for
device-to-device messaging such as address resolution (similar to ARP for IPv4). Devices include both host computers and routers.
Router Solicitation and Router Advertisement messages are for
messaging between devices and routers. Typically router discovery is used for dynamic address allocation and stateless address autoconfiguration (SLAAC).
