Connectivity Guide

Usage Information
• Use this command to enable local processing of IPv6 packets with hop-by-hop options in conformance with
the RFC 8200, IPv6 Specication.
• The no version of this command disables IPv6 processing of hop-by-hop header options.
Example: Disable
hop-by-hop option
processing
OS10(config)# interface ethernet 1/2/3
OS10(conf-if-eth1/2/3)# no ipv6 hop-by-hop
Supported Releases 10.4.0E(R1) or later
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 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 does not congure. 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, from 0 to 255.
Defaults 64 hops
Command Mode INTERFACE
520 Layer 3