Network Service Header (NSH) Parameters

Created: 2017-11-08
Last Updated: 2023-11-21
Available Formats: XML
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Registries included below

NSH Base Header Bits
NSH Version
NSH MD Types
NSH MD Class
NSH IETF-Assigned Optional Variable-Length Metadata Types
NSH Next Protocol
Forwarding Context Types
Flow ID Context Types

NSH Base Header Bits

Registration Procedure(s)

Standards Action

Reference

Available Formats

CSV

Bit	Description	Reference
2	O (OAM) bit	[RFC8300]
3	Unassigned
16-19	Unassigned

NSH Version

Registration Procedure(s)

Standards Action

Reference

Available Formats

CSV

Version	Description	Reference
00b	Protocol as defined by [RFC8300]	[RFC8300]
01b	Reserved	[RFC8300]
10b	Unassigned
11b	Unassigned

NSH MD Types

Registration Procedure(s)

IETF Review

Reference

Available Formats

CSV

MD Type	Description	Reference
0x0	Reserved	[RFC8300]
0x1	NSH MD Type 1	[RFC8300]
0x2	NSH MD Type 2	[RFC8300]
0x3-0xE	Unassigned
0xF	Experimentation	[RFC8300]

NSH MD Class

Expert(s)

Carlos Pignataro, Joel Halpern, Jim Guichard

Reference

Available Formats

CSV

Range	Registration Procedures
0x0000-0x01FF	IETF Review
0x0200-0xFFF5	Expert Review

Value	Meaning	Reference	Change Controller
0x0000	IETF Base NSH MD Class	[RFC8300]
0x0001-0x01FF	Unassigned
0x0200	BBF Specific NSH Metadata	[https://www.broadband-forum.org/assignments]	[Broadband_Forum]
0x0201-0xFFF5	Unassigned
0xFFF6-0xFFFE	Experimental	[RFC8300]
0xFFFF	Reserved	[RFC8300]

NSH IETF-Assigned Optional Variable-Length Metadata Types

Registration Procedure(s)

Standards Action

Reference

Available Formats

CSV

Value	Description	Reference
0x00	Subscriber Identifier	[RFC8979]
0x01	Performance Policy Identifier	[RFC8979]
0x02	MAC and Encrypted Metadata #1	[RFC9145]
0x03	MAC and Encrypted Metadata #2	[RFC9145]
0x04	Forwarding Context	[RFC9263]
0x05	Tenant ID	[RFC9263]
0x06	Ingress Network Node ID	[RFC9263]
0x07	Ingress Network Interface	[RFC9263]
0x08	Flow ID	[RFC9263]
0x09	Source and/or Destination Groups	[RFC9263]
0x0A	Policy ID	[RFC9263]
0x0B-0xFF	Unassigned

NSH Next Protocol

Registration Procedure(s)

Expert Review

Expert(s)

Carlos Pignataro, Joel Halpern, Jim Guichard

Reference

Note

If the actual assignment of the Next Protocol field allocation 
reaches half of the range (that is, when there are 128 unassigned 
values), IANA needs to alert the IESG. At that point, a new more 
strict allocation policy SHOULD be considered.

Available Formats

CSV

Next Protocol	Description	Reference
0x00	None	[RFC8393]
0x01	IPv4	[RFC8300]
0x02	IPv6	[RFC8300]
0x03	Ethernet	[RFC8300]
0x04	NSH	[RFC8300]
0x05	MPLS	[RFC8300]
0x06	IOAM (Next protocol is an IOAM header)	[RFC9452]
0x07	SFC Active OAM	[RFC9516]
0x08-0xFD	Unassigned
0xFE	Experiment 1	[RFC8300]
0xFF	Experiment 2	[RFC8300]

Forwarding Context Types

Registration Procedure(s)

IETF Review

Reference

Available Formats

CSV

Value	Forwarding Context Header Types	Reference
0x0	12-bit VLAN identifier	[RFC9263]
0x1	24-bit double tagging identifiers	[RFC9263]
0x2	20-bit MPLS VPN label	[RFC9263]
0x3	24-bit virtual network identifier (VNI)	[RFC9263]
0x4	32-bit Session ID	[RFC9263]
0x5-0xE	Unassigned
0xF	Reserved	[RFC9263]

Flow ID Context Types

Registration Procedure(s)

IETF Review

Reference

Available Formats

CSV

Value	Flow ID Context Header Types	Reference
0x0	20-bit IPv6 Flow Label	[RFC9263]
0x1	20-bit entropy label in the MPLS network	[RFC9263]
0x2-0xE	Unassigned
0xF	Reserved	[RFC9263]

Contact Information

ID	Name	Contact URI	Last Updated
[Broadband_Forum]	Broadband Forum	mailto:help&broadband-forum.org	2019-12-23