H3CSE route-IPv6 Neighbor Discovery, H3CSE route-IPv6 neighbor

H3CSE route-IPv6 Neighbor Discovery, H3CSE route-IPv6 neighbor

The ND (Neighbor Discovery, Neighbor Discovery) protocol is a key protocol of IPv6. It integrates some protocols in IPv4, such as ARP, ICMP Router Discovery, and ICMP redirection, and made improvements to them. This chapter describes important functions of IPv6 neighbor discovery protocols, such as address resolution and automatic configuration of stateless addresses, and explains how to configure the ND protocol.

The ND protocol uses ICMPv6 packets

Unlike IPv4 address resolution, IPv6 address resolution contains two processes.
Process of parsing the link layer address corresponding to an IPv6 address
Maintenance process of neighbor accessibility status, that is, neighbor inaccessibility detection (NUD)
Advantages of IPv6 Address Resolution:
Enhanced the independence of resolution protocols and underlying links
Enhanced security

Reduces the packet transmission range.

NUD(Neighbor Unreachability Detection, Neighbor inaccessibility detection) is the process of determining the neighbor accessibility of a node.

The neighbor accessibility state machine is used to describe the neighbor's accessibility. There are five statuses that can be migrated to each other.
INCOMPLETE (unfinished)
REACHABLE (REACHABLE)
STALE (invalid)
DEALY (latency)

PROBE)

IPv6Automatic Address Configuration:

Automatic Configuration of stateful addresses:
Obtain the address and related information from the DHCP server.
Stateless Address Configuration:
Automatically configure the IPv6 address and related information based on the information published by the router.
Advantages of automatic configuration of stateless addresses:
Real plug and play?

Is network migration convenient?

The ND Protocol completes vro discovery/prefix discovery by interacting with RS and RA packets between nodes and automatically configures Global IPv6 addresses.