API 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
autoconfiguration 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
Configures a static IPv6 static route.
Syntax
ipv6 route [vrf vrf-name] dest-ipv6–prefix mask {next-hop | interface
interface-type [route-preference]}
Parameters
● vrf vrf-name — (Optional) Enter vrf then the name of the VRF to install IPv6 routes in that VRF.
● dest-ipv6-prefix — Enter the destination IPv6 address in x:x:x:x::x format.
● mask — Enter the mask in slash prefix-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 configured
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 satisfied. 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 configuration.
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
Usage
Information
● By default, when no matching entry for an IPv6 route is found in the IPv6 routing table, the packet
drops and no error message is sent. Use this command to enable sending an IPv6 destination
unreachable error message to the source without dropping the packet.
● The no version of this command disables generating unreachable destination messages.
682 Layer 3