API Guide

If you disable IPv6 and configure a Layer (L2) interface in Layer (L3) mode, IPv6 is not automatically re-enabled on the
interface. You must manually re-enable it.
A link-local address automatically generates when you re-enable IPv6 on an interface with the ipv6 enable command.
Disable and enabIe IPv6
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address 2111:dddd:0eee::22/64
OS10(conf-if-eth1/1/8)# no ipv6 address autoconfig
OS10(conf-if-eth1/1/8)# no ipv6 enable
OS10(conf-if-eth1/1/8)# ipv6 enable
Display IPv6 status
OS10# show interface ethernet 1/1/20
Ethernet 1/1/20 is up, line protocol is up
Hardware is Dell EMC Eth, address is ec:f4:bb:fb:fa:30
Current address is ec:f4:bb:fb:fa:30
Pluggable media present, QSFP+ type is QSFP+ 40GBASE CR 1.0M
Wavelength is 850
Receive power reading is 0.0
Interface index is 17305562
Internet address is 20.20.20.1/24
Mode of IPv4 Address Assignment: MANUAL
Interface IPv6 oper status: Enabled
Link local IPv6 address: fe80::eef4:bbff:fefb:fa30/64
Global IPv6 address: 2020::1/64
...
OS10# show ipv6 interface brief
Interface Name admin/protocol IPV6 Address/Link-Local Address IPv6 Oper Status
===================================================================================
Ethernet 1/1/1:1 up / up fe80::eef4:bbff:fefb:f9f0/64
2017::1/64 Enabled
Ethernet 1/1/20 up / up fe80::eef4:bbff:fefb:fa30/64
2020::1/64 Enabled
Management 1/1/1 up / up fe80::eef4:bbff:fefb:f9ef/64 Enabled
Vlan 1 up / up fe80::eef4:bbff:fefb:fa59/64 Enabled
IPv6 addresses
An IPv6 address consists of a 48-bit global routing prefix, optional 16-bit subnet ID, and a 64-bit interface identifier in the
extended universal identifier (EUI)-64 format.
IPv6 128-bit addresses are represented as a series of eight 16-bit hexadecimal fields separated by colons: x:x:x:x:x:x:x:x.
2001:0db8:0000:0000:0000:0000:1428:57a
Leading zeros in each field are optional. You can also use two colons (::) to represent successive hexadecimal fields of zeros, but
you can use this short version only one time in each address:
2001:db8::1428:57ab
In the following example, all the addresses are valid and equivalent:
● 2001:0db8:0000:0000:0000:0000:1428:57ab
● 2001:0db8:0000:0000:0000::1428:57ab
● 2001:0db8:0:0:0:0:1428:57ab
● 2001:0db8:0:0::1428:57ab
● 2001:0db8::1428:57ab
● 2001:db8::1428:57ab
Write IPv6 networks using CIDR notation. An IPv6 network or subnet is a contiguous group of IPv6 addresses which must be a
power of two. The initial bits of addresses, which are identical for all hosts in the network, are the network's prefix.
668
Layer 3