Introduction To Ipv6 Neighbor Discovery Protocol - H3C S5100-SI Series Operation Manual

Operation Manual – IPv6 Management
H3C S5100-SI/EI Series Ethernet Switches
Figure 1-2 Convert a MAC address into an EUI-64 address

1.1.3 Introduction to IPv6 Neighbor Discovery Protocol

The IPv6 Neighbor Discovery Protocol (NDP) uses five types of ICMPv6 messages to
implement the following functions:
Address resolution
Neighbor unreachability detection
Duplicate address detection
Router/prefix discovery
Address autoconfiguration
Redirection
Table 1-3
Table 1-3 Types and functions of ICMPv6 messages
ICMPv6 message
Neighbor solicitation (NS)
message
Neighbor advertisement
(NA) message
Router solicitation (RS)
message
lists the types and functions of ICMPv6 messages used by the NDP.
Used to acquire the link-layer address of a neighbor
Used to verify whether the neighbor is reachable
Used to perform a duplicate address detection
Used to respond to a neighbor solicitation message
When the link layer address changes, the local node
initiates a neighbor advertisement message to notify
neighbor nodes of the change.
After started, a host sends a router solicitation
message to request the router for an address prefix
and other configuration information for the purpose of
autoconfiguration.
1-7
Chapter 1 IPv6 Configuration
Function