Connectivity Guide

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
show ipv6 neighbors
Displays IPv6 discovery information. Entering the command without options shows all IPv6 neighbor addresses stored on the control
processor (CP).
Syntax
show ipv6 neighbors [vrf vrf-name] [ipv6-address| interface interface]
Parameters
• vrf vrf-name — (Optional) Enter vrf then the name of the VRF to display the neighbors corresponding to
that VRF. If you do not specify this option, neighbors corresponding to the default VRF display.
• ipv6-address — Enter the IPv6 address of the neighbor in the x:x:x:x::x format. The :: notation species
successive hexadecimal elds of zero.
•
interface interface — Enter interface then the interface type and slot/port or number
information:
– For a 10-Gigabit Ethernet interface, enter TenGigabitEthernet then the slot/port/subport[/subport]
information.
– For a 40-Gigabit Ethernet interface, enter fortyGigE then the slot/port information.
– For a port channel interface, enter port-channel then a number.
– For a VLAN interface, enter vlan then a number from 1 to 4093.
Defaults None.
Command Mode EXEC
Usage Information
The no version of this command resets the value to the default.
Example
OS10# show ipv6 neighbors
IPv6 Address Hardware Address State Interface VLAN
-----------------------------------------------------------------
1001:db8:a1::2 00:c5:05:02:12:91 REACH ethernet1/1/5 12
1001:db8:a1::f 00:f5:50:02:54:75 REACH port-channel5 12
200::2 00:c5:05:02:12:91 STALE ethernet1/1/10
400::f 00:f5:50:02:54:75 REACH port-channel20
Supported Releases 10.4.1.0 or later or later
show ipv6 route
Displays IPv6 routes.
Syntax
show ipv6 route [vrf vrf-name] [all | bgp | connected | static | A::B/mask |
summary]
Layer 3 411