Allied Telesis AT-S95 CLI (AT-8000GS Series) - Manual (Page 154)

Page 154
Allied Telesis
AT-8000GS Command Line Interface User’s Guide
Unicast IPv6 addresses of the interface. Use the no form of this command to return the number of messages to
the default value.
Syntax
ipv6 nd dad attempts attempts-number
no ipv6 nd dad attempts
Parameters
•
attempts-number — The number of neighbor solicitation messages. Configuring a value of 0 disables
duplicate address detection processing on the specified interface. A value of 1 configures a single
transmission without follow-up transmissions. (Range: 0 - 600)
Default Configuration
Duplicate address detection on Unicast IPv6 addresses with the sending of one neighbor solicitation message is
enabled.
Command Mode
Interface configuration (VLAN 1 only).
User Guidelines
•
Duplicate address detection verifies the uniqueness of new Unicast IPv6 addresses before the addresses are
assigned to interfaces (the new addresses remain in a tentative state while duplicate address detection is
performed). Duplicate address detection uses neighbor solicitation messages to verify the uniqueness of
Unicast IPv6 addresses.
• An interface returning to administratively up restarts duplicate address detection for all of the Unicast IPv6
addresses on the interface. While duplicate address detection is performed on the link-local address of an
interface, the state for the other IPv6 addresses is still set to TENTATIVE. When duplicate address detection
is completed on the link-local address, duplicate address detection is performed on the remaining IPv6
addresses.
• When duplicate address detection identifies a duplicate address, the state of the address is set to
DUPLICATE and the address is not used. If the duplicate address is the link-local address of the interface, the
processing of IPv6 packets is disabled on the interface and an error message is displayed.
• All configuration commands associated with the duplicate address remain as configured while the state of the
address is set to DUPLICATE.
• If the link-local address for an interface changes, duplicate address detection is performed on the new
link-local address and all of the other IPv6 addresses associated with the interface are regenerated (duplicate
address detection is performed only on the new link-local address).
• Until the DAD process is completed, an IPv6 address is in a tentative state and cannot be used for data
transfer. It is recommended to limit the configured value.
Example
The following example configures the number of consecutive neighbor solicitation messages that are sent on an
interface while duplicate address detection is performed on the unicast IPv6 addresses of the interface to 10.
console# (config)# interface g1
console(config-if)# ipv6 nd dad attempts 10