NDP messages

[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.

[Vincent Onyango]

thanks for the breakdown

[Clever Sibale]

what is the line between ICMPv6 and NDP?

[Samuel Mwamsaku]

NDP is a specific protocol that uses ICMPv6 as a transport mechanism for its messaging. While ICMPv6 handles various types of messages across different tasks like error reporting and diagnostics, NDP is focused solely on neighbor-related communications on the local link like address resolution, router discovery, and duplicate address detection

[Eduardo Brito da Cunha]

I have a question: how does it work if my router is in DHCP proxy mode?

Will it redirect my RS to obtain M=1 and O=1?

[CHRISTABEL SEYRAM ANKAH]

When you find an answer to this, please do well to tag me. thanks

[SAYID-ALI MOALLIM BULE ALI]

can we apply NDP Messages real network ipv4?

[CHRISTABEL SEYRAM ANKAH]

I don’t think so, this is because NDP is an IPv6 only protocol which is defined in ICMPv6 and it’s functions replaces several IPv4 mechanisms.

[Abubakari Saddiq Adams]

Hi
How are you doing?