Link-Local IPv6 Address

Link-Local

IPv6 Address Type:	Link-Local
Prefix:	fe80::/10
Local Routeable:	No
Global Routeable:	No
Global Unique:	No
Example:	FE80::21B:D4FF:FE0F:8CA2
IPv4 Equivalent:	169.254.0.0/16 Link-Local

Explanation

These addresses are used on a single link or a non-routed common access network, such as an Ethernet LAN.

They do not need to be unique outside of that link.

Link-local addresses may appear as the source or destination of an IPv6 packet.

Routers must not forward IPv6 packets if the source or destination contains a link-local address.

IPv6 Address Types

IPv6 Link-Local Addresses

Link-Local Addresses are used by Nodes to communicate to other Nodes on the same Link. Link-Local addresses are not Routeable.

Format of Link-Local address

IPv6#<input>sh ipv6 int fa0/0</input>
FastEthernet0/0 is up, line protocol is up
  IPv6 is enabled, <notice>link-local address is FE80::21B:D4FF:FE0F:8CA2</notice>
  No Virtual link-local address(es):
  Description: Outside: Internet connection to ISP
  Global unicast address(es):
    2001:16D8:DD85:146::2, subnet is 2001:16D8:DD85:146::/64
  Joined group address(es):
    FF02::1
    FF02::2
    FF02::D
    FF02::16
    FF02::1:FF00:2
    FF02::1:FF0F:8CA2
  MTU is 1500 bytes
  ICMP error messages limited to one every 100 milliseconds
  ICMP redirects are enabled
  ICMP unreachables are sent
  ND DAD is enabled, number of DAD attempts: 1
  ND reachable time is 30000 milliseconds
  Hosts use stateless autoconfig for addresses.