Generic Associated Channel (G-ACh) Parameters

Created
2014-02-07
Last Updated
2025-06-02
Available Formats

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Registries Included Below

MPLS Generalized Associated Channel (G-ACh) Types (including Pseudowire Associated Channel Types)

Registration Procedure(s)
IETF Review
Reference
[RFC 4385][RFC 5586][RFC Errata 1940][RFC 7026][RFC 7214]
Available Formats

CSV
Value Description Reference
0x0000 Reserved
0x0001 Management Communication Channel (MCC) [RFC 5718]
0x0002 Signaling Communication Channel (SCC) [RFC 5718]
0x0003-0x0006 Unassigned
0x0007 BFD Control, PW-ACH encapsulation (without IP/UDP Headers) [RFC 5885]
0x0008 S-BFD Control, PW-ACH/L2SS encapsulation (without IP/UDP Headers) [RFC 7885]
0x0009 MPLS-TP Dual-Homing Coordination message [RFC 8185]
0x000A MPLS Direct Loss Measurement (DLM) [RFC 6374]
0x000B MPLS Inferred Loss Measurement (ILM) [RFC 6374]
0x000C MPLS Delay Measurement (DM) [RFC 6374]
0x000D MPLS Direct Loss and Delay Measurement (DLM+DM) [RFC 6374]
0x000E MPLS Inferred Loss and Delay Measurement (ILM+DM) [RFC 6374]
0x000F Residence Time Measurement [RFC 8169]
0x0010 Time Bucket Jitter Measurement [RFC 9571]
0x0011 Multi-packet Delay Measurement [RFC 9571]
0x0012 Average Delay Measurement [RFC 9571]
0x0013 Multipoint BFD Session [RFC 9780]
0x0014-0x0020 Unassigned
0x0021 Associated Channel carries an IPv4 packet [RFC 4385]
0x0022 MPLS-TP CC message [RFC 6428]
0x0023 MPLS-TP CV message [RFC 6428]
0x0024 Protection State Coordination Protocol - Channel Type (PSC-CT) [RFC 6378]
0x0025 On-Demand CV [RFC 6426]
0x0026 LI [RFC 6435]
0x0027 PW OAM Message [RFC 6478]
0x0028 MAC Withdraw OAM Message [RFC 7769]
0x0029 PW Status Refresh Reduction [RFC 8237]
0x002A Ring Protection Switching (RPS) Protocol [RFC 8227]
0x002B-0x0056 Unassigned
0x0057 Associated Channel carries an IPv6 packet [RFC 4385]
0x0058 Fault OAM [RFC 6427]
0x0059 G-ACh Advertisement Protocol [RFC 7212]
0x005A-0x7FF7 Unassigned
0x7FF8-0x7FFF Reserved for Experimental Use [RFC 5586]
0x8000-0x8901 Unassigned
0x8902 G.8113.1 OAM [RFC 6671]
0x8903-0xFFFF Unassigned

G-ACh Advertisement Protocol Application Registry

Registration Procedure(s)
IETF Review
Reference
[RFC 7212][RFC 7214]
Available Formats

CSV
Application ID Description Reference
0x0000 G-ACh Advertisement Protocol [RFC 7212]
0x0001 Ethernet Interface Parameters [RFC 7213]
0x0002-0xFFFF Unassigned

G-ACh Advertisement Protocol: GAP TLV Objects (Application ID 0)

Registration Procedure(s)
IETF Review
Reference
[RFC 7212][RFC 7214]
Available Formats

CSV
Type ID Type Name Reference
0 Source Address [RFC 7212]
1 GAP Request [RFC 7212]
2 GAP Flush [RFC 7212]
3 GAP Suppress [RFC 7212]
4 GAP Authentication [RFC 7212]
5-255 Unassigned

G-ACh Advertisement Protocol: Ethernet Interface Parameters

Registration Procedure(s)
IETF Review or IESG Approval
Reference
[RFC 7213][RFC 7214]
Available Formats

CSV
Type ID Type Name Reference
0 Source MAC Address [RFC 7213]
1 Maximum Frame Size [RFC 7213]
2-255 Unassigned

CC/CV MEP-ID TLV Registry

Registration Procedure(s)
Standards Action
Reference
[RFC 6428][RFC 7214]
Available Formats

CSV
Value Name Reference
0 Section MEP-ID [RFC 6428]
1 LSP MEP-ID [RFC 6428]
2 PW MEP-ID [RFC 6428]
3-255 Unassigned

Measurement Timestamp Type

Registration Procedure(s)
IETF Review
Reference
[RFC 6374][RFC 7214]
Available Formats

CSV
Type Description Size in Bits Reference
0 Null Timestamp 64 [RFC 6374]
1 Sequence Number 64 [RFC 6374]
2 Network Time Protocol version 4 64-bit Timestamp 64 [RFC 6374]
3 Truncated IEEE 1588v2 PTP Timestamp 64 [RFC 6374]
4-15 Unassigned

Loss/Delay Measurement Control Code: Query Codes

Registration Procedure(s)
IETF Review
Reference
[RFC 6374][RFC 7214]
Available Formats

CSV
Code Description Reference
0x0 In-band Response Requested [RFC 6374]
0x1 Out-of-band Response Requested [RFC 6374]
0x2 No Response Requested [RFC 6374]
0x3-0xFF Unassigned

Loss/Delay Measurement Control Code: Response Codes

Registration Procedure(s)
IETF Review
Reference
[RFC 6374][RFC 7214]
Note
Values 0x0-0xF are reserved for non-error response codes; please 
refer to Section 4.1 of [RFC 6374]
for guidelines.
Available Formats

CSV
Code Description Reference
0x0 Reserved [RFC 6374]
0x1 Success [RFC 6374]
0x2 Data Format Invalid [RFC 6374]
0x3 Initialization in Progress [RFC 6374]
0x4 Data Reset Occurred [RFC 6374]
0x5 Resource Temporarily Unavailable [RFC 6374]
0x6-0xF Unassigned
0x10 Unspecified Error [RFC 6374]
0x11 Unsupported Version [RFC 6374]
0x12 Unsupported Control Code [RFC 6374]
0x13 Unsupported Data Format [RFC 6374]
0x14 Authentication Failure [RFC 6374]
0x15 Invalid Destination Node Identifier [RFC 6374]
0x16 Connection Mismatch [RFC 6374]
0x17 Unsupported Mandatory TLV Object [RFC 6374]
0x18 Unsupported Query Interval [RFC 6374]
0x19 Administrative Block [RFC 6374]
0x1A Resource Unavailable [RFC 6374]
0x1B Resource Released [RFC 6374]
0x1C Invalid Message [RFC 6374]
0x1D Protocol Error [RFC 6374]
0x1E-0xFF Unassigned

MPLS Loss/Delay Measurement TLV Object

Registration Procedure(s)
IETF Review
Reference
[RFC 6374][RFC 7214]
Note
Types 0-127 are classified as Mandatory, and Types 128-255 are classified as Optional.
Available Formats

CSV
Code Description Reference
0 Padding - copy in response [RFC 6374]
1 Return Address [RFC 6374]
2 Session Query Interval [RFC 6374]
3 Loopback Request [RFC 6374]
4 Synonymous Flow Label [RFC 9571]
5 Return Path [RFC 9779]
6 Block Number [RFC 9779]
7-126 Unassigned
127 Experimental use [RFC 6374]
128 Padding - do not copy in response [RFC 6374]
129 Destination Address [RFC 6374]
130 Source Address [RFC 6374]
131 UDP Return [RFC 7876]
132-254 Unassigned
255 Experimental use [RFC 6374]

Return Path Sub-TLV Types

Reference
[RFC 9779]
Available Formats

CSV
Range Registration Procedures
1-175 IETF Review
176-239 First Come First Served
240-251 Experimental Use
252-254 Private Use
Value Description Reference
0 Reserved [RFC 9779]
1 MPLS Label Stack of the Return Path [RFC 9779]
2-239 Unassigned
240-251 Reserved for Experimental Use [RFC 9779]
252-254 Reserved for Private Use [RFC 9779]
255 Reserved [RFC 9779]

MPLS Fault OAM Message Type Registry

Registration Procedure(s)
Standards Action
Reference
[RFC 6427][RFC 7214]
Available Formats

CSV
Msg Type Description Reference
0 Reserved [RFC 6427]
1 Alarm Indication Signal (AIS) [RFC 6427]
2 Lock Report (LKR) [RFC 6427]
3-251 Unassigned
252-255 Reserved for Experimental Use [RFC 6427]

MPLS Fault OAM Flag Registry

Registration Procedure(s)
Standards Action
Reference
[RFC 6427][RFC 7214]
Available Formats

CSV
Bit Hex Description Reference
0-5 Unassigned
6 0x2 L-Flag [RFC 6427]
7 0x1 R-Flag [RFC 6427]

MPLS Fault OAM TLV Registry

Expert(s)
Unassigned
Reference
[RFC 6427][RFC 7214]
Available Formats

CSV
Range Registration Procedures
0-191 Standards Action
192-247 Specification Required
Value TLV Name Reference
0 Reserved [RFC 6427]
1 Interface Identifier TLV [RFC 6427]
2 Global Identifier [RFC 6427]
3-247 Unassigned
248-255 Reserved for Experimental Use [RFC 6427]

MPLS PSC Request Registry

Registration Procedure(s)
Standards Action
Reference
[RFC 6378][RFC 7214]
Available Formats

CSV
Value Description Reference
0 No Request [RFC 6378]
1 Do-not-Revert [RFC 6378]
2 Reverse Request [RFC 7271]
3 Exercise [RFC 7271]
4 Wait-to-Restore [RFC 6378]
5 Manual Switch [RFC 6378]
6 Unassigned
7 Signal Degrade [RFC 6378]
8-9 Unassigned
10 Signal Fail [RFC 6378]
11 Unassigned
12 Forced Switch [RFC 6378]
13 Unassigned
14 Lockout of protection [RFC 6378]
15 Unassigned

MPLS PSC TLV Registry

Registration Procedure(s)
IETF Review
Reference
[RFC 6378][RFC 7214]
Available Formats

CSV
Value Description Reference
0 Reserved, not to be allocated [RFC 6378][RFC 7324]
1 Capabilities [RFC 7271]
2-65535 Unassigned

MPLS PSC Capability Flag Registry

Registration Procedure(s)
Standards Action
Reference
[RFC 7271]
Available Formats

CSV
Bit Hex Value Capability Reference
0 0x80000000 priority modification [RFC 7271]
1 0x40000000 non-revertive behavior modification [RFC 7271]
2 0x20000000 support of MS-W command [RFC 7271]
3 0x10000000 support of protection against SD [RFC 7271]
4 0x08000000 support of EXER command [RFC 7271]
5-31 Unassigned

MPLS RTM TLV Registry

Reference
[RFC 8169]
Available Formats

CSV
Range Registration Procedures
0-127 IETF Review
128-191 First Come First Served
Value Description Reference
0 Reserved [RFC 8169]
1 No payload [RFC 8169]
2 PTPv2, Ethernet encapsulation [RFC 8169]
3 PTPv2, IPv4 encapsulation [RFC 8169]
4 PTPv2, IPv6 encapsulation [RFC 8169]
5 NTP [RFC 8169]
6-191 Unassigned
192-254 Reserved for Private Use [RFC 8169]
255 Reserved [RFC 8169]

MPLS RTM Sub-TLV Registry

Reference
[RFC 8169]
Available Formats

CSV
Range Registration Procedures
0-127 IETF Review
128-191 First Come First Served
Value Description Reference
0 Reserved [RFC 8169]
1 PTP [RFC 8169]
2-191 Unassigned
192-254 Reserved for Private Use [RFC 8169]
255 Reserved [RFC 8169]

MPLS-TP DHC TLVs

Registration Procedure(s)
IETF Review
Reference
[RFC 8185]
Available Formats

CSV
Type Description Length Reference
0x0000 Reserved [RFC 8185]
0x0001 PW Status 20 bytes [RFC 8185]
0x0002 Dual-Node Switching 16 bytes [RFC 8185]
0x0003-0xFFFF Unassigned

MPLS RPS Request Code Registry

Registration Procedure(s)
Specification Required
Expert(s)
Weiqiang Cheng, Jie Dong
Reference
[RFC 8227]
Available Formats

CSV
Value Description Reference
0 No Request (NR) [RFC 8227]
1 Reverse Request (RR) [RFC 8227]
2 Unassigned
3 Exercise (EXER) [RFC 8227]
4 Unassigned
5 Wait-to-Restore (WTR) [RFC 8227]
6 Manual Switch (MS) [RFC 8227]
7-10 Unassigned
11 Signal Fail (SF) [RFC 8227]
12 Unassigned
13 Forced Switch (FS) [RFC 8227]
14 Unassigned
15 Lockout of Protection (LP) [RFC 8227]
16-254 Unassigned
255 Reserved [RFC 8227]