Instruction Manual

Page 151
Allied Telesis
AT-8000S-S94-3.0 Command Line Interface User’s Guide
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.
ipv6 host
The ipv6 host Global Configuration mode command defines a static host name-to-address mapping in the host
name cache. Use the no form of this command to remove the host name-to-address mapping.
Syntax
ipv6 host name ipv6-address1 [ipv6-address2…ipv6-address4]
no ipv6 host name
Parameters
•
name — Name of the host. (Range: 1 - 158 characters)
• ipv6-address1 — Associated IPv6 address. The address is specified in hexadecimal using 16-bit values
between colons. When the IPv6 address is a Link-Local address (IPv6Z address), the outgoing interface
name must be specified. Refer to the usage guidelines for the interface name syntax.
• ipv6-address2–4 (optional) — Additional IPv6 addresses that may be associated with the host name.
Default Configuration
No host is defined.
console# (config)# interface e1
console(config-if)# ipv6 nd dad attempts 10