Reference Guide
Link-local addresses
When an OS10 switch boots up, an IPv6 unicast link-local address is automatically assigned to an interface using stateless conguration. A
link-local address allows IPv6 devices on a local link to communicate without requiring a globally unique address. IPv6 reserves the address
block FE80::/10 for link-local unicast addressing.
Global addresses
To enable stateless autoconguration of an IPv6 global address and set the interface to Host mode, use the ipv6 address
autoconfig command. The router receives network prexes in IPv6 router advertisements (RAs). An interface ID is appended to the
prex. In Host mode, IPv6 forwarding is disabled.
The no ipv6 address autoconfig command disables IPv6 global address autoconguration, and sets the interface to Router mode
with IPv6 forwarding enabled.
DHCP-assigned addresses
As an alternative to stateless autoconguration, you can enable a network host to obtain IPv6 addresses using a DHCP server via stateful
autoconguration using the ipv6 address dhcp command. A DHCPv6 server uses a prex pool to congure a network address on an
interface. The interface ID is automatically generated.
Manally congured addresses
An interface can have multiple IPv6 addresses. To congure an IPv6 address in addition to the link-local address, use the ipv6 address
ipv6-address/mask command. Enter the full 128-bit IPv6 address, including the network prex and a 64-bit interface ID.
You can also manually congure an IPv6 address by assigning:
• A network prex with the EUI-64 parameter using the ipv6 address ipv6-prefix eui64 command. A 64-bit interface ID is
automatically generated based on the MAC address.
• A link-local address to use instead of the link-local address that is automatically congured when you enable IPv6 using the ipv6
address link-local
command.
Congure IPv6 address
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address 2001:dddd:0eee::4/64
Congure network prex
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address 2001:FF21:1:1::/64 eui64
Congure link-local address
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address FE80::1/64 link-local
Stateless autoconguration
When an interface comes up, OS10 uses stateless autoconguration to generate a unique link-local IPv6 address with a FE80::/64 prex
and an interface ID generated from the MAC address. To use stateless autoconguration to assign a globally unique address using a prex
received in router advertisements, enter the ipv6 address autoconfig command.
Stateless autoconguration sets an interface in host mode, and allows the interface connected to an IPv6 network to autocongure IPv6
addresses and communicate with other IPv6 devices on local links. A DHCP server is not required for automatic IPv6 interface
conguration. IPv6 devices on a local link send router advertisement (RA) messages in response to solicitation messages received at
startup.
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