API Guide

Usage
Information
● An interface can have only one link-local address. By default, an IPv6 link-local address automatically
generates with a MAC-based EUI-64 interface ID when a router boots up and IPv6 is enabled. Use this
command to manually configure a link-local address to replace the autoconfigured address. For
example, to configure a more user-friendly link-local address, replace
fe80::eef4:bbff:fefb:fa30/64 with fe80::1/64.
● The no version of this command removes the specified link-local address.
Example
OS10(config)# interface mgmt 1/1/1
OS10(conf-if-ma-1/1/1)# ipv6 address 2111:dddd:0eee::22/64 link-local
Supported
Releases
10.4.0E(R1) or later
ipv6 hop-by-hop
Enables and disables processing hop-by-hop options in IPv6 packet headers.
Syntax
ipv6 hop-by-hop
Parameters None
Defaults Hop-by-hop header options in an IPv6 packet do not process on an interface.
Command Mode INTERFACE
Usage
Information
● Use this command to enable local processing of IPv6 packets with hop-by-hop options in conformance
with the RFC 8200, IPv6 Specification.
● 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
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 does not configure.
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
Layer 3 677