D-Link xStack DGS-3610 Series Configuration Manual page 412

Chapter 32 IPv6 Configuration
The neighbor solicitation message can also be used to detect the reachability of the
neighbor (for the existing neighbor). At this time, the destination address of the neighbor
solicitation message is the unicast address of this neighbor.
When the link layer address of one node changes, the neighbor advertisement will be sent
actively. At this time, the destination address of the neighbor advertisement message is the
addresses of all nodes for this link.
When one neighbor is considered that the reachable time is expired, should enable the
Neighbor Unreachability Detection (NUD), which will occur only when it is necessary to send
the unicast message to this neighbor. The NUD will not be enabled for the multicast
message transmission.
Furthermore, the neighbor solicitation message in the stateless address auto-configuration
can also be used to detect the unique of the address, namely the address conflict detect. At
this time, the source address of the message is unassigned address ( : : ).
32.1.5.2 Router Advertisement
The Router Advertisement (RA) is periodically sent to all nodes of the local links on the
router.
The sending of the Router Advertisement (RA) is shown as the figure below:
Figure 32-5
In general, the Router Advertisement (RA) contains the contents below:
One or more IPv6 address prefixes are used to provide for the host to carry out the

address auto-configuration.
The effective data of the IPv6 address prefix.

The usage of the host auto-configuration (Stateful or stateless).

The information as the default router (namely, determine whether this router is taken as

the default router. If yes, it will announce the time as the default router itself).
Provide the host with some other information about the configuration such as the hop

limit, the MTU and the neighbor solicitation retransmission interval.
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DGS-3610 Series Configuration Guide
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