Special-Purpose Multiprotocol Label Switching (MPLS) Label Values
- Created
- 2002-11-08
- Last Updated
- 2026-06-30
- Available Formats
-
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Registries Included Below
Base Special-Purpose MPLS Label Values
- Registration Procedure(s)
-
Standards Action
- Reference
- [RFC 3032][RFC 7274][RFC 9017]
- Available Formats
-
CSV
| Value | Description | Reference |
|---|---|---|
| 0 | IPv4 Explicit NULL Label | [RFC 3032] |
| 1 | Router Alert Label | [RFC 3032] |
| 2 | IPv6 Explicit NULL Label | [RFC 3032] |
| 3 | Implicit NULL Label | [RFC 3032] |
| 4 | MPLS Network Actions | [RFC 9994] |
| 5-6 | Unassigned | |
| 7 | Entropy Label Indicator (ELI) | [RFC 6790] |
| 8-12 | Unassigned | |
| 13 | Generic Associated Channel Label | [RFC 5586] |
| 14 | OAM Alert Label | [RFC 3429] |
| 15 | Extension Label (XL) | [RFC 7274][RFC 9017] |
Extended Special-Purpose MPLS Label Values
- Registration Procedure(s)
-
Standards Action
- Reference
- [RFC 7274]
- Available Formats
-
CSV
| Value | Description | Reference |
|---|---|---|
| 0-15 | Reserved. Never to be made available for allocation. | [RFC 7274] |
| 16 | Metadata Label Indicator (MLI) | [RFC 8595] |
| 17 | Metadata Present Indicator (MPI) | [RFC 8595] |
| 18 | Flow-ID Label Indicator (FLI) | [RFC 9714] |
| 19-239 | Unassigned | |
| 240-255 | Reserved for Experimental Use | [RFC 7274] |
| 256-1048575 | Reserved. Not to be made available for allocation without a new Standards Track RFC to define an allocation policy. | [RFC 7274] |