H3C Technologies H3C S5560 Series Switches - Manual (Page 157)

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• 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 " Configuring tunneling ."
• On an interface of another type (such as a serial interface)—The EUI-64 address-based interface
identifier is generated randomly by the device.
IPv6 ND protocol
The IPv6 Neighbor Discovery (ND) protocol uses the following ICMPv6 messages:
Table 8 ICMPv6 messages used by ND
ICMPv6 message Type Function
Neighbor Solicitation (NS) 135
Acquires the link-layer address of a neighbor.
Verifies whether a neighbor is reachable.
Detects duplicate addresses.
Neighbor Advertisement
(NA)
136
Responds to an NS message.
Notifies the neighboring nodes of link layer changes.
Router Solicitation (RS) 133
Requests an address prefix and other configuration information
for autoconfiguration after startup.
Router Advertisement (RA) 134
Responds to an RS message.
Advertises information, such as the Prefix Information options
and flag bits.
Redirect 137
Informs the source host of a better next hop on the path to a
particular destination when certain conditions are met.
Address resolution
This function is similar to ARP in IPv4. An IPv6 node acquires the link-layer addresses of neighboring
nodes on the same link through NS and NA messages.
Figure 56 shows how Host A acquires the
link-layer address of Host B on the same link.
Figure 56 Address resolution
The address resolution procedure is as follows:
1. Host A multicasts an NS message. The source address of the NS message is the IPv6 address of the
sending interface of Host A and the destination address is the solicited-node multicast address of