[John Lemi]

A bit Summary of NDP.

The Neighbor Discovery is a key protocol of IPv6. Neighbor Discovery Protocol is an umbrella that defines these below mechanisms:

1. Since ARP has been removed in IPv6, IPv6 follows a newer way to find the link-layer addresses of nodes on the local link. This new mechanism uses a mix of ICMPv6 messages and multicast addresses.

2. Stateless Auto-Configuration – This mechanism allows nodes on the local link to configure their IPv6 addresses by themselves by using a mix of ICMPv6 messages and multicast addresses.

3. Router Redirection – The router sends ICMPv6 messages to an IPv6 node to inform it of the presence of a better router address on the same local link to reach a destination network.

*Neighbour Discovery (ND) is for end hosts predominately, whereas routers themselves advertise gateway capabilities via Router Advertisements (RA). This mechanism relies on ICMPv6 Type 133 and 134.

[John Lemi]

*Which ICMPv6 SMS is sent by a host in an attempt to locate an online IPv6 enabled router to obtain IPv6 addressing information.

*What are the flags setting when a host should use the SLAAC only option.