LevelOne GTL-2690 - Manual (Page 705)

IP Interface Commands
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ipv6 nd dad attempts
This command configures the number of consecutive neighbor solicitation
messages sent on an interface during duplicate address detection. Use the no form
to restore the default setting.
Syntax
ipv6 nd dad attempts count
no ipv6 nd dad attempts
count - The number of neighbor solicitation messages sent to determine
whether or not a duplicate address exists on this interface. (Range: 0-600)
Default Setting
1
Command Mode
Interface Configuration (VLAN)
Command Usage
• Configuring a value of 0 disables duplicate address detection.
• Duplicate address detection determines if a new unicast IPv6 address already
exists on the network before it is assigned to an interface.
• Duplicate address detection is stopped on any interface that has been
suspended (see the vlan command on page 34-6). While an interface is
suspended, all unicast IPv6 addresses assigned to that interface are placed
in a “pending” state. Duplicate address detection is automatically restarted
when the interface is administratively re-activated.
• An interface that is re-activated restarts duplicate address detection for all
unicast IPv6 addresses on the interface. While duplicate address detection is
performed on the interface’s link-local address, the other IPv6 addresses
remain in a “tentative” state. If no duplicate link-local address is found,
duplicate address detection is started for the remaining IPv6 addresses.
• If a duplicate address is detected, it is set to “duplicate” state, and a warning
message is sent to the console. If a duplicate link-local address is detected,
IPv6 processes are disabled on the interface. If a duplicate global unicast
address is detected, it is not used. All configuration commands associated
with a duplicate address remain configured while the address is in “duplicate”
state.
• If the link-local address for an interface is changed, duplicate address
detection is performed on the new link-local address, but not for any of the
IPv6 global unicast addresses already associated with the interface.