OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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ipv6 nd dad

Disables or re-enables IPv6 duplicate address discovery (DAD).

Syntax
ipv6 nd dad {disable | enable | disable-ipv6-on-dad-failure}
Parameters
  • disable — Disable duplicate address discovery on the interface.
  • enable — Re-enable IPv6 duplicate address discovery if you have disabled it.
  • disable-ipv6-on-dad-failure — Enable duplicate address discovery on the existing autoconfigured link-local address.
Defaults
Duplicate address discovery is enabled on an interface.
Command Mode
INTERFACE
Usage Information
  • An OS10 switch sends a neighbor solicitation message to determine if an autoconfigured IPv6 unicast link-local address is unique before assigning it to an interface. If the process of duplicate address discovery (DAD) detects a duplicate address in the network, the link-local address is not configured. Other IPv6 addresses are still active on the interface.
  • By default, DAD does not disable IPv6 if a duplicate link-local address is detected in the network. To disable IPv6 on an interface when a duplicate link-local address is detected, use the ipv6 nd dad disable-ipv6-on-failure command.
Example: Disable DAD
OS10(config)# interface ethernet 1/1/1
                                       OS10(conf-if-eth1/1/1)# ipv6 nd dad disable
                                    
Example: Enable DAD on link-local address
OS10(config)# interface ethernet 1/1/1
                                       OS10(conf-if-eth1/1/1)# ipv6 nd dad disable-ipv6-on-dad-failure
                                    
Supported Releases
10.4.0E(R1) or later

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