In Situ OAM (IOAM)
2021-12-20
2026-07-31
IOAM Option-Type
IETF Review
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
5-63
Unassigned
64
IOAM Integrity-Protected Pre-allocated Trace Option-Type
Pre-allocated Trace with Integrity Protection
RFC-ietf-ippm-ioam-data-integrity-20, Section 4
65
IOAM Integrity-Protected Incremental Trace Option-Type
Incremental Trace with Integrity Protection
RFC-ietf-ippm-ioam-data-integrity-20, Section 4
66
IOAM Integrity-Protected POT Option-Type
POT with Integrity Protection
RFC-ietf-ippm-ioam-data-integrity-20, Section 4
67
IOAM Integrity-Protected E2E Option-Type
E2E with Integrity Protection
RFC-ietf-ippm-ioam-data-integrity-20, Section 4
68-127
Unassigned
IOAM Trace-Type
IETF Review
0
hop_Lim and node_id in short format
1
ingress_if_id and egress_if_id in short format
2
timestamp seconds
3
timestamp fraction
4
transit delay
5
namespace-specific data in short format
6
queue depth
7
checksum complement
8
hop_Lim and node_id in wide format
9
ingress_if_id and egress_if_id in wide format
10
namespace-specific data in wide format
11
buffer occupancy
12-21
Unassigned
22
variable-length Opaque State Snapshot
23
Reserved
IOAM Trace-Flags
IETF Review
0
"Overflow" (O-bit)
1
"Loopback" (L-bit)
2
"Active" (A-bit)
3
Unassigned
IOAM POT-Type
IETF Review
0
16-Octet POT data
See Section 4.5
RFC9197, Section 4.5
1-255
Unassigned
IOAM POT-Flags
IETF Review
0-7
Unassigned
IOAM E2E-Type
IETF Review
0
64-bit sequence number
1
32-bit sequence number
2
timestamp seconds
3
timestamp fraction
4-15
Unassigned
IOAM Namespace-ID
0x0000
Expert Review
0x0001-0x7FFF
Private Use
0x8000-0xFFFF
Expert Review
Unassigned
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
IETF Review
0-7
Unassigned
IOAM DEX Extension-Flags
IETF Review
0
Flow ID
1
Sequence Number
2
Multicast Branching Node ID
3
Multicast Branching Interface Index
4-7
Unassigned
IOAM Integrity Protection Methods
IETF Review
When this registry is modified, the YANG module iana-ioam-integrity-protection-methods
must be updated as defined in .
0x00
AES-GMAC, 16-octet (full) Authentication Tag, 12-octet Initialization Vector.
Pre-allocated Trace and Incremental Trace:
- Namespace-ID (mask = 0xffff)
- NodeLen + Flags + RemainingLen (mask = 0xfb00)
- IOAM Trace-Type (mask = 0xffffff)
- Reserved (mask = 0x00)
POT:
- Namespace-ID (mask = 0xffff)
- IOAM-POT-Type (mask = 0xff)
- IOAM-POT-Flags (mask = 0x00)
E2E:
- Namespace-ID (mask = 0xffff)
- IOAM-E2E-Type (mask = 0xffff)
RFC-ietf-ippm-ioam-data-integrity-20, Section 5
0x01-0xFE
Unassigned
0xFF
Reserved