IANA OUI Ethernet Numbers
- Last Updated
- 2024-05-02
- Note
-
This page has assignments by IANA as specified in [RFC9542] to be under the IANA OUI. For some information on IEEE 802 number assignments by the IEEE Registration Authority and how to contact that authority, see the [IANA registry ieee-802-numbers].
- Available Formats
-
XML
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Plain text
Registries included below
- IANA MAC ADDRESS BLOCK
- The CFxxxx Series
- SNAP Protocol Numbers
- IANA Link Layer Discovery Protocol (LLDP) TLV Subtypes
IANA MAC ADDRESS BLOCK
- Registration Procedure(s)
-
See [RFC9542].
- Expert(s)
-
Donald Eastlake (primary), Juan Carlos Zuniga (secondary)
- Reference
- [RFC9542]
- Note
-
IANA allocates addresses under the IANA OUI (00-00-5E) as explained in [RFC9542]. Unicast addresses under the IANA OUI start with 00-00-5E, while multicast addresses under the IANA OUI start with 01-00-5E. In the lists below, these initial 3 bytes are omitted for brevity. As described in [RFC9542], 48-bit MAC addresses in the range 33-33-00-00-00-00 to 33-33-FF-FF-FF-FF are used for IPv6 multicast. When the available space for either multicast or unicast EUI-48 identifiers under OUI 00-00-5E has been 90% or more exhausted, IANA should request an additional OUI from the IEEE Registration Authority for further IANA assignment use. The appointed Expert(s) should monitor for this condition and notify IANA.
IANA Unicast 48-bit MAC Addresses
| Range | Registration Procedures |
|---|---|
| Small to medium assignments of up to 65536 identifiers | Expert Review |
| Large assignments of 131072 or more identifiers | IESG Ratification, as defined in [RFC9542], Section 5.1 |
| Assignment(s) in the 00-00-00 to 00-00-FF range | IESG Ratification, as defined in [RFC9542], Section 5.1 |
| Addresses | Usage | Reference |
|---|---|---|
| 00-00-00 to 00-00-FF | Reserved | [RFC9542] |
| 00-01-00 to 00-01-FF | VRRP (Virtual Router Redundancy Protocol) | [RFC9568] |
| 00-02-00 to 00-02-FF | VRRP IPv6 (Virtual Router Redundancy Protocol IPv6) | [RFC9568] |
| 00-03-00 to 00-51-FF | Unassigned | |
| 00-52-00 | PacketPWEthA | [RFC6658] |
| 00-52-01 | PacketPWEthB | [RFC6658] |
| 00-52-02 | BFD for VXLAN | [RFC8971] |
| 00-52-03 to 00-52-12 | Unassigned (small allocations) | |
| 00-52-13 | Proxy Mobile IPv6 | [RFC6543] |
| 00-52-14 to 00-52-FF | Unassigned (small allocations) | |
| 00-53-00 to 00-53-FF | Documentation | [RFC9542] |
| 00-54-00 to 90-00-FF | Unassigned | |
| 90-01-00 | TRILL OAM | [RFC7455] |
| 90-01-01 to 90-01-FF | Unassigned (small allocations requiring both unicast and multicast) | |
| 90-02-00 to FF-FF-FF | Unassigned |
IANA Multicast 48-bit MAC Addresses
| Range | Registration Procedures |
|---|---|
| Small to medium assignments of up to 65536 identifiers | Expert Review |
| Large assignments of 131072 or more identifiers | IESG Ratification, as defined in [RFC9542], Section 5.1 |
| Addresses | Usage | Reference |
|---|---|---|
| 00-00-00 to 7F-FF-FF | IPv4 Multicast | [RFC1112] |
| 80-00-00 to 8F-FF-FF | MPLS Multicast | [RFC5332] |
| 90-00-00 | MPLS-TP p2p | [RFC7213] |
| 90-00-01 | Bidirectional Forwarding Detection (BFD) on Link Aggregation Group (LAG) Interfaces | [RFC7130] |
| 90-00-02 | AllL1MI-ISs | [RFC8202] |
| 90-00-03 | AllL2MI-ISs | [RFC8202] |
| 90-00-04 to 90-00-FF | Unassigned (small allocations) | |
| 90-01-00 | TRILL OAM | [RFC7455] |
| 90-01-01 to 90-01-FF | Unassigned (small allocations requiring both unicast and multicast) | |
| 90-02-00 to 90-0F-FF | Unassigned | |
| 90-10-00 to 90-10-FF | Documentation | [RFC9542] |
| 90-11-00 to FF-FF-FF | Unassigned |
IANA 64-bit MAC Addresses
- Note
-
These values are prefixed with 00-00-5E to form unicast MAC addresses, with 01-00-5E to form multicast MAC addresses, with 02-00-5E to form unicast modified EUI-64 addresses, and with 03-00-5E to form multicast modified EUI-64 addresses. See [RFC9542], particularly Section 2.2.2, for more details.
- Available Formats
-
CSV
| Range | Registration Procedures |
|---|---|
| Small to medium assignments of up to 268435456 identifiers | Expert Review |
| Assignments of any size, including blocks of 536870912 or more | IESG Ratification, as defined in [RFC9542], Section 5.1 |
| Assignments from Reserved ranges | IESG Ratification, as defined in [RFC9542], Section 5.1 |
| Addresses | Usage | Reference |
|---|---|---|
| 00-00-00-00-00 to 0F-FF-FF-FF-FF | Reserved | [RFC9542] |
| 10-00-00-00-00 to 10-00-00-00-FF | Documentation | [RFC9542] |
| 10-00-00-01-00 to EF-FF-FF-FF-FF | Unassigned | |
| FD-00-00-00-00 to FD-FF-FF-FF-FF | Reserved | [RFC9542] |
| FE-00-00-00-00 to FE-FF-FF-FF-FF | IPv4 Addr Holders | [RFC9542] |
| FF-00-00-00-00 to FF-FD-FF-FF-FF | Reserved | [RFC9542] |
| FF-FE-00-00-00 to FF-FE-FF-FF-FF | IANA EUI-48 Holders | [RFC9542] |
| FF-FF-00-00-00 to FF-FF-FF-FF-FF | Reserved | [RFC9542] |
The CFxxxx Series
- Note
-
[RFC2153] described a method of using a "pseudo OUI" for certain purposes when there is no appropriate regular OUI assigned. The registry for these is on the PPP Parameters IANA web page. The CF series registry has been closed by [RFC5342]. Please see: [IANA registry ppp-numbers].
| Value | Description | Reference |
|---|---|---|
| No registrations at this time. | ||
SNAP Protocol Numbers
- Registration Procedure(s)
-
Expert Review
- Expert(s)
-
Donald Eastlake (primary), Juan Carlos Zuniga (secondary)
- Reference
- [RFC9542]
- Note
-
The SNAP protocol number assignments use the IANA OUI. Values 0000 and FFFF require IESG Ratification as described in section 5.1 of [RFC9542]. - Available Formats
-
CSV
| Protocol Number (decimal) | Protocol Number (hex) | Description | References |
|---|---|---|---|
| 0000 | 0000 | reserved | [RFC9542] |
| 0001 | 0001 | MARS Data Messages (short form) | [RFC2022] |
| 0002 | 0002 | reserved for future NHRP use | [RFC2332] |
| 0003 | 0003 | MARS/NHRP Control Messages | [RFC2022][RFC2332] |
| 0004 | 0004 | MARS Data Messages (long form) | [RFC2022] |
| 0005 | 0005 | SCSP - Server Cache Sync Protocol | [RFC2334] |
| 0006 | 0006 | VRID - Virtual Router MAC Address | [S_Knight] |
| 0007 | 0007 | L2TP | [RFC3070] |
| 0008 | 0008 | Virtual Private Network ID | [RFC2684] |
| 0009-0065 | 0009-0041 | Unassigned | |
| 0066 | 0042 | Documentation Use | [RFC9542] |
| 0067-65534 | 0043-FFFE | Unassigned | |
| 65535 | FFFF | Reserved | [RFC9542] |
IANA Link Layer Discovery Protocol (LLDP) TLV Subtypes
- Registration Procedure(s)
-
Expert Review
- Expert(s)
-
Eliot Lear, Dan Romascanu
- Reference
- [RFC8520][RFC9542]
- Available Formats
-
CSV
| Value | Description | Reference |
|---|---|---|
| 0 | Reserved | [RFC9542] |
| 1 | the Manufacturer Usage Description (MUD) Uniform Resource Locator (URL) | [RFC8520] |
| 2-41 | Unassigned | |
| 42 | Example for use in documentation | [RFC9542] |
| 43-254 | Unassigned | |
| 255 | Reserved | [RFC9542] |
Contact Information
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [S_Knight] | S. Knight | mailto:steven.knight&ascend.com | 1997-11 |