In Situ OAM (IOAM)

Created
2021-12-20
Last Updated
2025-10-23
Available Formats

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Registries Included Below

IOAM Option-Type

Registration Procedure(s)
IETF Review
Reference
[RFC9197]
Available Formats

CSV
Code Point Name Description Reference
0 IOAM Pre-allocated Trace Option-Type See Section 4.4.1 [RFC9197, Section 4.4.1]
1 IOAM Incremental Trace Option-Type See Section 4.4.1 [RFC9197, Section 4.4.1]
2 IOAM POT Option-Type See Section 4.5 [RFC9197, Section 4.5]
3 IOAM E2E Option-Type See Section 4.6 [RFC9197, Section 4.6]
4 IOAM Direct Export (DEX) Option-Type Direct exporting [RFC9326]
5-63 Unassigned
64 IOAM Integrity Protected Pre-allocated Trace Option-Type (TEMPORARY - registered 2022-11-24, extension registered 2025-10-23, expires 2026-11-24) See Section 4 [draft-ietf-ippm-ioam-data-integrity-15]
65 IOAM Integrity Protected Incremental Trace Option-Type (TEMPORARY - registered 2022-11-24, extension registered 2025-10-23, expires 2026-11-24) See Section 4 [draft-ietf-ippm-ioam-data-integrity-15]
66 IOAM Integrity Protected POT Option-Type (TEMPORARY - registered 2022-11-24, extension registered 2025-10-23, expires 2026-11-24) See Section 4 [draft-ietf-ippm-ioam-data-integrity-15]
67 IOAM Integrity Protected E2E Option-Type (TEMPORARY - registered 2022-11-24, extension registered 2025-10-23, expires 2026-11-24) See Section 4 [draft-ietf-ippm-ioam-data-integrity-15]
68-127 Unassigned

IOAM Trace-Type

Registration Procedure(s)
IETF Review
Reference
[RFC9197]
Available Formats

CSV
Bit Description Reference
0 hop_Lim and node_id in short format [RFC9197]
1 ingress_if_id and egress_if_id in short format [RFC9197]
2 timestamp seconds [RFC9197]
3 timestamp fraction [RFC9197]
4 transit delay [RFC9197]
5 namespace-specific data in short format [RFC9197]
6 queue depth [RFC9197]
7 checksum complement [RFC9197]
8 hop_Lim and node_id in wide format [RFC9197]
9 ingress_if_id and egress_if_id in wide format [RFC9197]
10 namespace-specific data in wide format [RFC9197]
11 buffer occupancy [RFC9197]
12-21 Unassigned
22 variable-length Opaque State Snapshot [RFC9197]
23 Reserved [RFC9197]

IOAM Trace-Flags

Registration Procedure(s)
IETF Review
Reference
[RFC9197][RFC Errata 6992]
Available Formats

CSV
Bit Description Reference
0 "Overflow" (O-bit) [RFC9197]
1 "Loopback" (L-bit) [RFC9322]
2 "Active" (A-bit) [RFC9322]
3 Unassigned

IOAM POT-Type

Registration Procedure(s)
IETF Review
Reference
[RFC9197]
Available Formats

CSV
Code Point Name Description Reference
0 16-Octet POT data See Section 4.5 [RFC9197, Section 4.5]
1-255 Unassigned

IOAM POT-Flags

Registration Procedure(s)
IETF Review
Reference
[RFC9197]
Available Formats

CSV
Bit Description Reference
0-7 Unassigned

IOAM E2E-Type

Registration Procedure(s)
IETF Review
Reference
[RFC9197]
Available Formats

CSV
Bit Description Reference
0 64-bit sequence number [RFC9197]
1 32-bit sequence number [RFC9197]
2 timestamp seconds [RFC9197]
3 timestamp fraction [RFC9197]
4-15 Unassigned

IOAM Namespace-ID

Expert(s)
Unassigned
Reference
[RFC9197]
Available Formats

CSV
Range Registration Procedures
0x0000 Expert Review
0x0001-0x7FFF Private Use
0x8000-0xFFFF Expert Review
Code Point Name Description Status Reference
0x0000 default namespace (known to all IOAM nodes) See Section 4.3 permanent [RFC9197, Section 4.3]
0x0001-0x7FFF Reserved for Private Use See Section 4.3 [RFC9197, Section 4.3]
0x8000-0xFFFF Unassigned

IOAM DEX Flags

Registration Procedure(s)
IETF Review
Reference
[RFC9326]
Available Formats

CSV
Bit Description Reference
0-7 Unassigned

IOAM DEX Extension-Flags

Registration Procedure(s)
IETF Review
Reference
[RFC9326]
Available Formats

CSV
Bit Description Reference
0 Flow ID [RFC9326]
1 Sequence Number [RFC9326]
2 Multicast Branching Node ID [RFC9630]
3 Multicast Branching Interface Index [RFC9630]
4-7 Unassigned