Difference between revisions of "EUI-64"

Latest revision as of 12:18, 13 June 2011

EUI-64 or Modified EUI-64 are often used as the lower 64 bit of a IPv6 Address.

EUI-64

EUI-64^[1] or Extended Unique Identifier is a 64 bit Global Identifier administered by IEEE^[2]

Examples of use

FireWire^[3] and in IPv6 as least significant 64 bits in Link-Local and Global Unicast if Stateless Autoconfiguration. (Except Systems that will choice a Random page fx. Windows 7)

EUI-48

EUI-48^[4] or Extended Unique Identifier is a 48 bit Global Identifier administered by IEEE^[5].

Examples of use

Ethernet MAC addresses is a example of EUI-48 usage. Other examples of technologies that use EUI-48 are Bluetooth and 802.11 Wireless Networks.

IPv6 Modifed EUI-64 Address

Understanding the MAC-Address

The MAC-Address is divided into two parts.

The first 24 bits identifies the manufacturer and are called the OUI
1. The OUI is administered by IEEE^[2]
The last 24 bits identifies Extension Identifier or NIC
1. The manufacturer can use this field as serial-number

The MAC-Address is Global Unique and has two flag in its first octet. (Byte)

bit 1: Unicast or Multicast
- The MAC 'broadcast' address FF:FF:FF:FF:FF:FF is really a Well-Known link-local Multicast address used by for example IPv4 ARP and DHCP.
bit 2: Globally or locally administered. When bit 2 is 0 the Global Unique IEEE^[2] identifier is used. When bit 2 is 1 it's a Local generated address.

Generating the Modified EUI-64

When generating a modified EUI-64 as the 64 lower bits of a IPv6 Address the hosts EUI-48 (MAC-Address) is expanded to 64 bits by inserting FF:FE between the OUI and the Extension Identifer or NIC and setting the Locally Administered Bit.

Example

A node with MAC-address 00:10:56:A7:16:D5 will generate 00:10:56:FF:FE:A7:16:D5 as EUI-64

References

[1] ttp://standards.ieee.org/develop/regauth/tut/eui64.pdf

[IEEE-2] 2.0 ^2.1 ^2.2 http://www.ieee.org/index.html

[3] ttp://en.wikipedia.org/wiki/IEEE_1394_interface

[4] ttp://standards.ieee.org/develop/regauth/tut/eui48.pdf

[5] ttp://www.ieee.org/index.html

[1]

[2]

[3]

[4]

[5]

@@ Line 1: / Line 1: @@
-=EUI-64=
+__NOTOC__
-EUI-64<ref>http://standards.ieee.org/develop/regauth/tut/eui64.pdf</ref> or Extended Unique Identifier is a 64 bit Global Identifier administered by IEEE<ref>http://www.ieee.org/index.html</ref> FireWire<ref>http://en.wikipedia.org/wiki/IEEE_1394_interface</ref> and in IPv6 as least significant 64 bits in [[Link-Local IPv6 Address|Link-Local]] and [[Global Unicast IPv6 Address|Global Unicast]] if [[Stateless Autoconfiguration IPv6|Stateless Autoconfiguration]]. (Except Systems that will choice a Random page fx. [[Windows 7 IPv6|Windows 7]])
+EUI-64 or Modified EUI-64 are often used as the lower 64 bit of a [[IPv6 Address]].
-=EUI-48=
+==EUI-64==
-EUI-48<ref>http://standards.ieee.org/develop/regauth/tut/eui48.pdf</ref> or Extended Unique Identifier is a 48 bit Global Identifier administered by IEEE<ref>http://www.ieee.org/index.html</ref>. Ethernet MAC addresses is a example of EUI-48 usage. Other examples of technologies that use EUI-48 are [[Bluetooth]] and 802.11 Wireless Networks.
+EUI-64<ref>http://standards.ieee.org/develop/regauth/tut/eui64.pdf</ref> or Extended Unique Identifier is a 64 bit Global Identifier administered by IEEE<ref name=IEEE>http://www.ieee.org/index.html</ref>
-=References=
+===Examples of use===
+FireWire<ref>http://en.wikipedia.org/wiki/IEEE_1394_interface</ref> and in IPv6 as least significant 64 bits in [[Link-Local IPv6 Address|Link-Local]] and [[Global Unicast IPv6 Address|Global Unicast]] if [[Stateless Autoconfiguration IPv6|Stateless Autoconfiguration]]. (Except Systems that will choice a Random page fx. [[Windows 7 IPv6|Windows 7]])
+==EUI-48==
+EUI-48<ref>http://standards.ieee.org/develop/regauth/tut/eui48.pdf</ref> or Extended Unique Identifier is a 48 bit Global Identifier administered by IEEE<ref>http://www.ieee.org/index.html</ref>.
+===Examples of use===
+Ethernet MAC addresses is a example of EUI-48 usage. Other examples of technologies that use EUI-48 are [[Bluetooth]] and 802.11 Wireless Networks.
+==IPv6 Modifed EUI-64 Address==
+{|
+|valign="top" |
+===Understanding the MAC-Address===
+The MAC-Address is divided into two parts.
+#The first 24 bits identifies the manufacturer and are called the OUI
+##The OUI is administered by IEEE<ref name=IEEE />
+#The last 24 bits identifies Extension Identifier or NIC
+##The manufacturer can use this field as serial-number
+The MAC-Address is Global Unique and has two flag in its first octet. (Byte)
+*bit 1: Unicast or Multicast
+**The MAC 'broadcast' address FF:FF:FF:FF:FF:FF is really a Well-Known link-local Multicast address used by for example IPv4 ARP and DHCP.
+*bit 2: Globally or locally administered. When bit 2 is 0 the Global Unique IEEE<ref name=IEEE /> identifier is used. When bit 2 is 1 it's a Local generated address.
+|
+[[Image:MAC address.png|400px|The MAC-address is a EUI-48 Identifier]]
+|-
+|valign="top" |
+==Generating the Modified EUI-64==
+When generating a modified EUI-64 as the 64 lower bits of a [[IPv6 Address]] the hosts EUI-48 (MAC-Address) is expanded to 64 bits by inserting FF:FE between the OUI and the Extension Identifer or NIC and setting the Locally Administered Bit.
+===Example===
+*A node with MAC-address 00:10:56:A7:16:D5 will generate 00:10:56:'''FF:FE''':A7:16:D5 as EUI-64
+|
+[[Image:EUI-64 address generation.png|400px|Generation of the EUI-64 identifier from the MAC-address]]
+|-
+|}
+==References==
 <references/>
 [[Category:IPv6]]