Structure of Management Information (SMI) Numbers (MIB Module Registrations)

Last Updated

2026-08-18

Note

For the management of hosts and gateways on the Internet a data
structure for the information has been defined.  This data structure
should be used with any of several possible management protocols, such
as the "Simple Network Management Protocol" (SNMP) [RFC 1157], or the
"Common Management Information Protocol over TCP" (CMOT) [RFC 1095].

The data structure is the "Structure and Identification of Management
Information for TCP/IP-based Internets" (SMI) [RFC 1155], and the
"Management Information Base for Network Management of TCP/IP-based
Internets" (MIB-II) [RFC 1213].

The SMI includes the provision for parameters or codes to indicate
experimental or private data structures.  These parameter assignments
are listed here.

The older "Simple Gateway Monitoring Protocol" (SGMP) [RFC 1028] also
defined a data structure.  The parameter assignments used with SGMP
are included here for historical completeness.

The network management object identifiers are under the iso (1), org
(3), dod (6), internet (1), or 1.3.6.1, branch of the name space.

1.3 is listed below as "org" in accordance with RFC 1157.  In the OID 
specification, ITU-T recommendation X.660, the ASN.1 notation for 1.3 
is "identified-organization".

1                   iso
1.3                 org
1.3.6               dod
1.3.6.1             internet
1.3.6.1.1           directory
1.3.6.1.2           mgmt
1.3.6.1.2.1         mib-2
1.3.6.1.2.1.2.2.1.3 ifType
1.3.6.1.2.1.10      transmission
1.3.6.1.2.1.10.23   transmissionppp
1.3.6.1.2.1.27      application
1.3.6.1.2.1.28      mta
1.3.6.1.2.2         pib
1.3.6.1.3           experimental
1.3.6.1.4           private
1.3.6.1.4.1         enterprise
1.3.6.1.5           security
1.3.6.1.6           SNMPv2
1.3.6.1.6.1         snmpDomains
1.3.6.1.6.2         snmpProxys
1.3.6.1.6.3         snmpModules
1.3.6.1.7           mail
1.3.6.1.8           features

Available Formats

XML
HTML
TXT

Registries Included Below

• SMI Network Management Directory Codes
• SMI Network Management MGMT Codes
  • SMI Network Management MGMT Codes Internet-standard MIB
• Interface Types (ifType)
• Tunnel Types (tunnelType)
• Transmission Number Values
  • MIB Transmission Group - Point-to-Point Protocol
  • MIB Transmission Group - MPLS STD MIB
• MIB - Remote Network Monitoring
  • rmonConformance (Value 20)
• Internet-standard MIB - Network Services Monitoring
  • mib-2.application.assocTable.assocEntry.assocApplicationProtocol
  • mib-2.application.applTCPProtoID (1.3.6.1.2.1.27.4)
  • mib-2.application.applUDPProtoID (1.3.6.1.2.1.27.5)
• Internet-standard MIB - Mail Monitoring
  • mib-2.mta.mtaGroupTable.MailGroupEntry.mtaGroupMailProtocol
• SMI mib-2 snanauMIB Codes
• spdActions
• IPFIX-SELECTOR-MIB Functions
• SMI pib PIB Codes
• SMI Experimental Codes
  • SMI experimental PIB codes
• SMI Private Codes
• Private Enterprise Numbers (PENs)
• SMI Security Codes (including S/MIME, PKIX and LTANS)
  • SMI Security for Integrity Codes
  • SMI Security for Confidentiality Codes
  • SMI Security for Mechanism Codes
  • SMI Security for S/MIME Mail Security (1.2.840.113549.1.9.16)
  • SMI Security for S/MIME Module Identifier (1.2.840.113549.1.9.16.0)
  • SMI Security for S/MIME CMS Content Type (1.2.840.113549.1.9.16.1)
  • SMI Security for S/MIME Attributes (1.2.840.113549.1.9.16.2)
  • SMI Security for S/MIME Algorithms (1.2.840.113549.1.9.16.3)
  • SMI Security for S/MIME Certificate Distribution Mechanisms (1.2.840.113549.1.9.16.4)
  • SMI Security for S/MIME Signature Policy Qualifier (1.2.840.113549.1.9.16.5)
  • SMI Security for S/MIME Commitment Type Identifier (1.2.840.113549.1.9.16.6)
  • SMI Security for S/MIME Test Security Policies (1.2.840.113549.1.9.16.7)
  • SMI Security for S/MIME Control Attributes for Symmetric Key Distribution (1.2.840.113549.1.9.16.8)
  • SMI Security for S/MIME Signature Type Identifiers (1.2.840.113549.1.9.16.9)
  • SMI Security for X.400 Encoded Information Types (EIT) for S/MIME objects (1.2.840.113549.1.9.16.10)
  • SMI Security for S/MIME Capabilities (other than cryptographic algorithms) (1.2.840.113549.1.9.16.11)
  • SMI Security for S/MIME Portable Symmetric Key Container (PSKC) Attributes (1.2.840.113549.1.9.16.12)
  • SMI Security for S/MIME Other Recipient Info Identifiers (1.2.840.113549.1.9.16.13)
  • SMI Security for Mechanism SPKM Codes
  • SMI Security for Mechanism MSP-Based IDUP (MIM) Codes
  • SMI Security for PKIX
  • SMI Security for PKIX Module Identifier
  • SMI Security for PKIX Certificate Extension
  • SMI Security for PKIX Policy Qualifier
  • SMI Security for PKIX Extended Key Purpose
  • SMI Security for PKIX CMP Information Types
  • SMI Security for PKIX CRMF Registration
  • SMI Security for PKIX CRMF Registration Controls
  • SMI Security for PKIX CRMF Registration Controls for Alternate Certificate Formats
  • SMI Security for PKIX CRMF Registration Information
  • SMI Security for PKIX Algorithms
  • SMI Security for PKIX CMC Controls
  • SMI Security for PKIX CMC GLA Requests and Responses
  • SMI Security for PKIX Other Name Forms
  • SMI Security for PKIX Personal Data Attributes
  • SMI Security for PKIX Attribute Certificate Attributes
  • SMI Security for PKIX Qualified Certificate Statements
  • SMI Security for PKIX CMC Content Types
  • SMI Security for PKIX OIDs Used Only for Testing
  • SMI Security for PKIX Certificate Policies
  • SMI Security for PKIX CMC Error Types
  • SMI Security for PKIX Revocation Information Types
  • SMI Security for PKIX SCVP Check Types
  • SMI Security for PKIX SCVP Want Back Types
  • SMI Security for PKIX SCVP Validation Policies and Algorithms
  • SMI Security for PKIX SCVP Name Validation Policy Errors
  • SMI Security for PKIX SCVP Basic Validation Policy Errors
  • SMI Security for PKIX SCVP Distinguished Name Validation Policy Errors
  • SMI Security for PKIX Other Logotype Identifiers
  • SMI Security for PKIX Proxy Certificate Policy Languages
  • SMI Security for PKIX Proxy Matching Rules
  • SMI Security for PKIX Subject Key Identifier Semantics
  • SMI Security for SCEP Attribute Identifiers
  • SMI Security for PKIX Relative Distinguished Name Attribute
  • SMI Security for PKIX Access Descriptor
  • SMI Security for PKIX Online Certificate Status Protocol (OCSP)
  • SMI Security for Mechanism IPsec Codes
  • SMI Security for Mechanism isakmpOakley Codes
  • SMI Security for Mechanism IPSec Certificate Usage Codes
  • SMI Security for Mechanism ASN.1 Modules
  • SMI Security for IAKERB GSS-API Mechanism Codes
  • SMI Security for LTANS
  • SMI Security for LTANS Module Identifier
  • SMI Security for LTANS CMS Content Type
  • SMI Security for LTANS ERS Encryption Method
  • SMI Security for Mechanism msec Codes
  • SMI Security for Mechanism msec module-identifers
  • SMI Security for Mechanism msec content-types
  • SMI Security for Mechanism msec security-suites
  • SMI Security for Mechanism msec protocol-identifiers
  • SMI Security for Mechanism msec rekey-methods
  • SMI Security for Mechanism msec rekey-reliability-methods
  • SMI Security for Mechanism msec distributed-operations-methods
  • SMI Security for Mechanism msec data-policies
  • SMI Security for Mechanism gsscma Codes
  • Object Identifiers for Application Bridging for Federated Access
  • iso.org.dod.internet.security.mechanisms.abfab.mechanisms
  • iso.org.dod.internet.security.mechanisms.abfab.nametypes
• SMI Security for Name System Designators Codes (nametypes)
• SMI Security Services Codes
  • SMI Security Services Codes (conf)
  • SMI Security Services Codes (integrity)
  • SMI Security Services Codes (doa)
  • SMI Security Services Codes (non-rep)
  • SMI Security Services Codes (acc)
  • SMI Security Services Codes (dflow)
  • SMI Security Services Codes (time)
• SMI SNMPv2 Codes
  • SNMPv2 snmpDomains Codes
  • SMI SNMPv2 snmpModules Codes
• SNMP Management Architecture - Security Subsystem (SnmpSecurityModel)
• SNMP Management Architecture - Message Processing Subsystem (SnmpMessageProcessingModel)
• SMI mail Codes
  • SMI mail MIME MHS Codes
  • SMI mail MIME MHS headings Codes
  • SMI mail MIME MHS bodies Codes
  • SMI mail MIME MHS bodies data Codes
  • SMI mail MIME MHS bodies parameter Codes
  • SMI mail MIME-MHS core Codes
• SMI Features
• SMI Security for Cryptographic Algorithms
• SNMP-TLSTM HashAlgorithms

SMI Network Management Directory Codes

Description

iso.org.dod.internet.directory (1.3.6.1.1.)

Note

Please see: [IANA registry ldap-parameters]

SMI Network Management MGMT Codes

Registration Procedure(s)

Not Defined ?

Description

iso.org.dod.internet.mgmt (1.3.6.1.2.)

Reference

[RFC 2578]

Available Formats

CSV

Interface Types (ifType)

Registration Procedure(s)

Expert Review

Expert(s)

Dave Thaler

Description

iso.org.dod.internet.mgmt.mib-2.interface.ifTable.ifEntry.ifType (1.3.6.1.2.1.2.2.1.3)

Reference

[RFC 1213][RFC 2863][RFC 7224][RFC 8892]

Note

For future ifType assignments, an OID-subtree assignment in MIB-II's 'transmission' 
subtree will be made with the same value. In addition, the [IANAifType-MIB] and 
[iana-if-type YANG] modules should be updated in accordance with [RFC 2863] and 
[RFC 7224], respectively.
    

Note

For a functional mib language definition please see the following:      
[IANA registry ianaiftype-mib]        
      
      Rules for real mib names:
      
          #NAME?                  
          "-if its made of several words,"                        
          the second and later word's first letter is uppercase                  
          #NAME?                  
          #NAME?                  
          #NAME?                  
                  Thus by way of example we have:         
                  traif           kosher
                  -----           ------
                  ddn-x25         "ddnX25(4),"
                  FDDI            "fddi(15),"
                  smds-dxi        "smdsDxi(43),"  
                  IEEE802.11      "ieee80211(71),"        
          "-Finally, the last item in the list has no comma,"                     
           while all previous items have a comma
    

Note

Note: MIB and YANG formats are available at [IANAifType-MIB] and [iana-if-type].
    

Request an Assignment

[https://www.iana.org/protocols/apply]
    
    

Available Formats

CSV

Tunnel Types (tunnelType)

Registration Procedure(s)

Expert Review

Expert(s)

Dave Thaler

Description

iso.org.dod.internet.mgmt.mib-2.interface.ifTable.ifEntry.ifType.tunnelType (1.3.6.1.2.1.2.2.1.3.131)

Reference

[RFC 4087][RFC 8675][RFC 8892]

Note

When this registry is modified, the [IANAifType-MIB] and [iana-tunnel-type]
modules should be updated in accordance with [RFC 2863] and [RFC 8675], respectively.
      

Note

For a functional mib language definition please see the following:  
[IANA registry ianaiftype-mib]  
        
  Rules for real mib names:

    #NAME?      
    "-if its made of several words,"      
     the second and later word's first letter is uppercase      
    #NAME?      
    #NAME?      
    #NAME?      
      Thus by way of example we have:   
      traif   kosher
      -----   ------
      ddn-x25   "ddnX25(4),"
      FDDI    "fddi(15),"
      smds-dxi  "smdsDxi(43),"  
      IEEE802.11  "ieee80211(71),"  
    "-Finally, the last item in the list has no comma,"     
     while all previous items have a comma
      

Note

Note: MIB and YANG formats are available at [IANAifType-MIB] and [iana-tunnel-type].
      

Available Formats

CSV

Transmission Number Values

Registration Procedure(s)

Specification Required

Expert(s)

Dave Thaler

Description

iso.org.dod.internet.mgmt.mib-2.transmission (1.3.6.1.2.1.10)

Reference

[RFC 1213][RFC 8892]

Note

For future transmission number assignments, an 'ifType' assignment 
will be made with the same value.

Available Formats

CSV

MIB - Remote Network Monitoring

Registration Procedure(s)

Standards Action

Reference

[RFC 2819][RFC 3737]

Available Formats

CSV

Internet-standard MIB - Network Services Monitoring

Description

iso.org.dod.internet.mgmt.mib-2.application (1.3.6.1.2.1.27)

Internet-standard MIB - Mail Monitoring

Description

iso.org.dod.internet.mgmt.mib-2.mta (1.3.6.1.2.1.28)

SMI mib-2 snanauMIB Codes

Registration Procedure(s)

Not Defined ?

Description

iso.org.dod.internet.mgmt.mib-2.snanauMIB (1.3.6.1.2.1.34)

Reference

[RFC 1666]

Available Formats

CSV

spdActions

Registration Procedure(s)

Specification Required

Expert(s)

Wes Hardaker

Description

iso.org.dod.internet.mgmt.mib-2.spdmib.sdpActions (1.3.6.1.2.1.153.4)

Reference

[RFC 4807]

IPFIX-SELECTOR-MIB Functions

Registration Procedure(s)

Expert Review

Expert(s)

Unassigned

Description

iso.org.dod.internet.mgmt.mib-2.ipfixSelectorMIB.ipfixSelectorObjects.ipfixSelectorFunctions (1.3.6.1.2.1.194.1.1)

Reference

[RFC 6615]

Available Formats

CSV

SMI pib PIB Codes

Registration Procedure(s)

Standards Action

Description

iso.org.dod.internet.mgmt.pib (1.3.6.1.2.2)

Reference

[RFC 3159]

Available Formats

CSV

SMI Experimental Codes

Registration Procedure(s)

Experimental RFC

Description

iso.org.dod.internet.experimental (1.3.6.1.3)

Reference

[RFC 4181][RFC 2578][RFC 1155]

Available Formats

CSV

SMI Private Codes

Registration Procedure(s)

Not Defined

Description

iso.org.dod.internet.private (1.3.6.1.4)

Reference

[RFC 2578]

Available Formats

CSV

Private Enterprise Numbers (PENs)

Registration Procedure(s)

First Come First Served

Description

iso.org.dod.internet.private.enterprise (1.3.6.1.4.1)

Reference

[RFC 9371]

Note

See [IANA registry enterprise-numbers].
      

SMI Security Codes (including S/MIME, PKIX and LTANS)

Registration Procedure(s)

Not Defined ?

Description

iso.org.dod.internet.security (1.3.6.1.5)

Reference

[Not Defined ?]

Available Formats

CSV