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Available Formats
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Registries included below
Registration Procedure(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.
Available Formats
CSV
| 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 |
Available Formats
CSV
| 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 |
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] |
[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. | ||
Registration Procedure(s)
Expert Review
Donald Eastlake (primary), Juan Carlos Zuniga (secondary)
Reference [RFC9542] Note
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] |
Registration Procedure(s)
Expert Review
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] |
| ID | Name | Contact URI | Last Updated |
|---|---|---|---|
| [S_Knight] | S. Knight | mailto:steven.knight&ascend.com | 1997-11 |
