Connectivity Guide

Usage Information
• Using ICMPv6 RA messages, the Neighbor Discovery Protocol (NDP) advertises the IPv6 addresses of IPv6-
enabled interfaces and learns of any address changes in IPv6 neighbors. Before you enable sending RA
messages, the switch must be in Router mode with IPv6 forwarding enabled and stateless autoconguration
disabled no ipv6 address autoconfig command.
• The no version command disables RA messages.
Example
OS10(config)# interface ethernet 1/2/3
OS10(conf-if-eth1/2/3)# ipv6 nd send-ra
Supported Releases 10.4.0E(R1) or later
ipv6 route
Congures a static IPv6 static route.
Syntax
ipv6 route [dst-vrf vrf-name] ipv6–prefix mask {next-hop | interface interface-
type [route-preference]}
Parameters
• dst-vrf vrf-name — (Optional) Enter vrf then the name of the VRF to install IPv6 routes in that VRF.
• ipv6-prefix — Enter the IPv6 address in x:x:x:x::x format.
• mask — Enter the mask in slash prex-length /x format.
• next-hop — Enter the next-hop IPv6 address in x:x:x:x::x format.
• interface interface-type — Enter the interface type then the slot/port or number information. The
interface types supported are: Ethernet, port-channel, VLAN, and Null.
• route-preference — (Optional) Enter a route-preference range, from 1 to 255.
Default Not congured
Command Mode CONFIGURATION
Usage Information
• When the interface fails, the system withdraws the route. The route reinstalls when the interface comes back
up. When a recursive resolution breaks, the system withdraws the route. The route reinstalls when the
recursive resolution is satised. After you create an IPv6 static route interface, if you do not assign an IP
address to a peer interface, you must manually ping the peer to resolve the neighbor information.
• The no version of this command deletes the IPv6 route conguration.
Example
OS10(config)# ipv6 route 2111:dddd:0eee::22/128 2001:db86:0fff::2
OS10(config)# ipv6 route 2111:dddd:0eee::22/128 interface null 0
Supported Releases 10.2.0E or later
ipv6 unreachables
Enables generating error messages on an interface for IPv6 packets with unreachable destinations.
Syntax
ipv6 unreachables
Parameters None
Defaults ICMPv6 unreachable messages are not sent.
Command Mode INTERFACE
410 Layer 3