Link-Local Address - Cisco AP776A - Nexus Converged Network Switch 5020 Configuration Manual

Cisco mds 9000 family cli configuration guide - release 4.x (ol-18084-01, february 2009)

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S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m

Cisco MDS NX-OS supports IEEE 802 interface types (for example, Gigabit Ethernet interfaces). The

first three octets (24 bits) are taken from the Organizationally Unique Identifier (OUI) of the 48-bit

link-layer address (MAC address) of the interface, the fourth and fifth octets (16 bits) are a fixed

hexadecimal value of FFFE, and the last three octets (24 bits) are taken from the last three octets of the

MAC address. The construction of the interface ID is completed by setting the Universal/Local (U/L)

bit—the seventh bit of the first octet—to a value of 0 or 1. A value of 0 indicates a locally administered

identifier; a value of 1 indicates a globally unique IPv6 interface identifier (see

Link-Local Address

A link-local address is an IPv6 unicast address that is automatically configured on an interface using the

link-local prefix FE80::/10 and the interface identifier in the modified EUI-64 format. Link-local

addresses are used in the neighbor discovery protocol and the stateless autoconfiguration process. Nodes

on a local link can use link-local addresses to communicate.

link-local address.

1111 1110 10

Cisco MDS 9000 Family CLI Configuration Guide

Interface Identifier Format

Where U is 0 (not unique)

or 1 (unique)

Link-Local Address Format

Interface ID

Configuring IPv6 for Gigabit Ethernet Interfaces

shows the structure of a

OL-18084-01, Cisco MDS NX-OS Release 4.x

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