Ipv6 Neighbor Discovery Protocol - HP A7500 Series Configuration Manual

Figure 45 Convert a MAC address into an EUI-64 address-based interface identifier
On a tunnel interface
•
The lower 32 bits of the EUI-64 address-based interface identifier are the source IPv4 address of the
tunnel interface. The higher 32 bits of the EUI-64 address-based interface identifier of an ISATAP tunnel
interface are 0000:5EFE, whereas those of other tunnel interfaces are all zeros. For more information
about tunnels, see the chapter "Tunneling configuration."
On an interface of another type
•
The EUI-64 address-based interface identifier is generated randomly by the device.

IPv6 neighbor discovery protocol

The IPv6 Neighbor Discovery (ND) protocol uses five types of ICMPv6 messages to implement the
following functions:
Address resolution
•
Neighbor reachability detection
•
• Duplicate address detection
Router/prefix discovery and address autoconfiguration
•
Redirection
•
Table 9 lists the types and functions of ICMPv6 messages used by the ND protocol.
Table 9 ICMPv6 messages used by ND
ICMPv6 message
Neighbor Solicitation (NS)
message
Neighbor Advertisement
(NA) message
Router Solicitation (RS)
message
Router Advertisement (RA)
message
Type Function
Acquires the link-layer address of a neighbor.
135
Verifies whether a neighbor is reachable.
Detects duplicate addresses.
Responds to an NS message.
136
Notifies the neighboring nodes of link layer changes.
Requests an address prefix and other configuration information
133
for autoconfiguration after startup.
Responds to an RS message.
134
Advertises information such as the Prefix Information options and
flag bits.
104