Connectivity Guide

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
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.
Example
OS10(config)# interface ethernet 1/2/3
OS10(conf-if-eth1/2/3)# ipv6 unreachables
Supported Releases 10.4.0E(R1) or later
Layer 3 525