Connectivity Guide

Congure network prex
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address 2001:FF21:1:1::/64 eui64
Congure link-local address
OS10(config)# interface ethernet 1/1/8
OS10(conf-if-eth1/1/8)# ipv6 address FE80::1/64 link-local
Stateless autoconguration
When an interface comes up, OS10 uses stateless autoconguration to generate a unique link-local IPv6 address with a FE80::/64 prex
and an interface ID generated from the MAC address. To use stateless autoconguration to assign a globally unique address using a prex
received in router advertisements, use the ipv6 address autoconfig command.
Stateless autoconguration sets an interface in Host mode, and allows the interface connected to an IPv6 network to autocongure IPv6
addresses and communicate with other IPv6 devices on local links. A DHCP server is not required for automatic IPv6 interface
conguration. IPv6 devices on a local link send router advertisement (RA) messages in response to solicitation messages received at
startup.
Perform stateless autoconguration of IPv6 addresses using:
Prex advertisement Routers use router advertisement messages to advertise the network prex. Hosts append their interface-identier
MAC address to generate a valid IPv6 address.
Duplicate address
detection
An IPv6 host node checks whether that address is used anywhere on the network using this mechanism before
conguring its IPv6 address.
Prex renumbering Transparent renumbering of hosts in the network when an organization changes its service provider.
IPv6 provides the exibility to add prexes on RAs in response to a router solicitation (RS). By default, RA response messages are sent
when an RS message is received. The system manipulation of IPv6 stateless autoconguration supports the router side only. Neighbor
Discovery (ND) messages advertise so the neighbor can use the information to auto-congure its address. Received ND messages are not
used to create an IPv6 address.
Inconsistencies in RA values between routers are logged. The values checked for consistency include:
• Current hop limit
• M and O ags
• Reachable time
• Retransmission timer
• MTU options
• Preferred and valid lifetime values for the same prex
The router redirect functionality in the NDP is similar to IPv4 router redirect messages. NDP uses ICMPv6 redirect messages (Type 137) to
inform nodes that a better router exists on the link.
Neighbor Discovery
The IPv6 NDP determines if neighboring IPv6 devices are reachable and receives the IPv6 addresses of IPv6 devices on local links. Using
the link-layer and global prexes of neighbor addresses, OS10 performs stateless autoconguration of IPv6 addresses on interfaces.
ICMPv6 RA messages advertise the IPv6 addresses of IPv6-enabled interfaces and allow a router to learn of any address changes in IPv6
neighbors. By default, RAs are disabled on an interface.
Prerequisites
512
Layer 3