Quick Reference Guide

Template Last Updated - 7/01/2005 IPv6 Addressing 233
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DELL CONFIDENTIAL – PRELIMINARY 5/15/12 – FOR PROOF ONLY
• ipv6-address — The IPv6 network address assigned to the interface. The address is specified in
hexadecimal using 16-bit values between colons.
Default Configuration
IPv6 is enabled on the interface. Link local address of the interface is FE80::EUI64 (interface MAC
address).
Command Mode
Interface configuration (Ethernet, VLAN, Port-channel). Cannot be configured for a range of interfaces
(range context).
User Guidelines
• Using the no ipv6 link-local address command removes the manually configured link local IPv6 address
from an interface. Multiple IPv6 addresses can be configured per interface, but only one link-local
address. When the
no ipv6 link-local address command is used, the interface is reconfigured with the
standard link local address (the same IPv6 link-local address that is set automatically when the
enable
ipv6
command is used). The system automatically generates a link-local address for an interface when
IPv6 processing is enabled on the interface. To manually specify a link-local address to be used by an
interface, use the
ipv6 link-local address command. The system supports only 64 bits prefix length for
link-local addresses.
Example
The following example assigns FE80::260:3EFF:FE11:6770 as the link-local address.
ipv6 unreachables
The ipv6 unreachables Interface Configuration mode command enables the generation of Internet Control
Message Protocol for IPv6 (ICMPv6) unreachable messages for any packets arriving on a specified
interface. Use the no form of this command to prevent the generation of unreachable messages.
Syntax
• ipv6 unreachables
• no ipv6 unreachables
Default Configuration
ICMP unreachable messages are sent by default.
Console# Console (config)# interface g1
Console (config-if)# ipv6 address FE80::260:3EFF:FE11:6770 link-
local