# SMI and the OID Tree

**Canonical:** https://apis.io/apis/snmp/smi/  
**Provider:** SNMP — https://apis.io/providers/snmp/  
**Documentation:** https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml

SMI and the OID Tree is one of 5 APIs that [SNMP](https://apis.io/providers/snmp/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include SMI, OID, IANA, Enterprise Numbers, and PEN. The published artifact set on APIs.io includes API documentation.

Structure of Management Information — the data definition language and naming scheme that every MIB module is written against. The IANA SMI Numbers registry administers the OID hierarchy rooted at 1.3.6.1, including standard MIBs under 1.3.6.1.2.1 and Private Enterprise Numbers under 1.3.6.1.4.1 (the namespace organizations use to publish their own MIBs).

## Machine-readable artifacts (2)

- **Documentation** — https://www.iana.org/assignments/smi-numbers/smi-numbers.xhtml
- **Documentation** — https://www.iana.org/assignments/enterprise-numbers/

## Other SNMP APIs (4)

- [SNMPv1 (RFC 1157)](https://apis.io/apis/snmp/snmpv1/)
- [SNMPv2c (RFC 1901-1908)](https://apis.io/apis/snmp/snmpv2c/)
- [SNMPv3 Architecture (RFC 3411-3418)](https://apis.io/apis/snmp/snmpv3/)
- [IF-MIB (RFC 2863) — The Interfaces Group MIB](https://apis.io/apis/snmp/if-mib/)

## Tags

SMI, OID, IANA, Enterprise Numbers, PEN

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/snmp/smi/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/snmp/.