Reference Guide

• enable — Re-enable IPv6 duplicate address discovery if you have disabled it.
• disable-ipv6-on-dad-failure — Enable duplicate address discovery on the existing autocongured
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 autocongured 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 congured. 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
ipv6 nd hop-limit
Sets the hop limit advertised in RA messages and included in IPv6 data packets sent by the router.
Syntax
ipv6 nd hop-limit hops
Parameters
• hop-limit hops — Enter the maximum number of hops allowed for RA messages (0 to 255).
Defaults 64 hops
Command Mode INTERFACE
Usage Information The congured hop limit is advertised in RA messages and included in IPv6 data packets sent by the router. 0
indicates that no hop limit is specied by the router.
Example
OS10(config)# interface ethernet 1/2/3
OS10(conf-if-eth1/2/3)# ipv6 nd hop-limit 100
Supported Releases 10.4.0E(R1) or later
ipv6 nd managed-cong-ag
Sends RA messages that tell hosts to use stateful address autoconguration, such as DHCPv6, to obtain IPv6 addresses.
Syntax
ipv6 nd managed-config-flag
Parameters None
Defaults Not congured
Command Mode INTERFACE
376 Layer 3