RFC 4836
Definitions of Managed Objects for IEEE 802.3 Medium Attachment Units (MAUs)
Network Working Group E. Beili Request for Comments: 4836 Actelis Networks Obsoletes: 3636 April 2007 Category: Standards Track Definitions of Managed Objects for IEEE 802.3 Medium Attachment Units (MAUs) Status of This Memo This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited. Copyright Notice Copyright (C) The IETF Trust (2007).Abstract
This document defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines objects for managing IEEE 802.3 Medium Attachment Units (MAUs). This document obsoletes RFC 3636. It amends that specification by moving MAU type OBJECT-IDENTITY definitions and relevant textual conventions into a separate Internet Assigned Number Authority (IANA) maintained MIB module. In addition, management information is added to enable support for Ethernet in the First Mile (EFM) and 10GBASE-CX4 MAUs.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3 2. The Internet-Standard Management Framework . . . . . . . . . . 3 3. Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3.1. Relationship to RFC 3636 . . . . . . . . . . . . . . . . . 4 3.2. Relationship to Other MIBs . . . . . . . . . . . . . . . . 5 3.2.1. Relationship to the Interfaces MIB . . . . . . . . . . 5 3.2.2. Relationship to the 802.3 Repeater MIB Module . . . . 6 3.3. Management of Internal MAUs . . . . . . . . . . . . . . . 6 3.4. Mapping of IEEE 802.3 Managed Objects . . . . . . . . . . 6 3.5. Addition of New MAU Types . . . . . . . . . . . . . . . . 9 3.5.1. dot3MauType OBJECT-IDENTITIES . . . . . . . . . . . . 9 3.5.2. IANAifMauTypeListBits TEXTUAL-CONVENTION . . . . . . . 9 3.5.3. IANAifMauMediaAvailable TEXTUAL-CONVENTION . . . . . . 9 3.5.4. IANAifMauAutoNegCapBits TEXTUAL-CONVENTION . . . . . . 10 3.5.5. JackType TEXTUAL-CONVENTION . . . . . . . . . . . . . 10 4. MAU MIB Definitions . . . . . . . . . . . . . . . . . . . . . 10 5. IANA-Maintained MAU TC Definitions . . . . . . . . . . . . . . 46 6. Security Considerations . . . . . . . . . . . . . . . . . . . 62 7. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 63 8. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 63 9. References . . . . . . . . . . . . . . . . . . . . . . . . . . 64 9.1. Normative References . . . . . . . . . . . . . . . . . . . 64 9.2. Informative References . . . . . . . . . . . . . . . . . . 66
1. Introduction
This document defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines objects for managing IEEE 802.3 [IEEE802.3] Medium Attachment Units (MAUs). The previous version of this document, RFC 3636 [RFC3636], defined a single MIB module. This document splits the original MIB module into two, putting frequently updated object identities and textual conventions into a separate, IANA-maintained MIB module, in order to decrease the need of updating the basic MAU MIB module. The first version of the IANA-maintained MIB module also extends the list of managed objects to support Ethernet in the First Mile (EFM) and 10GBASE-CX4 interfaces. Ethernet technology, as defined by the 802.3 Working Group of the IEEE, continues to evolve, with scalable increases in speed, new types of cabling and interfaces, and new features. This evolution may require changes in the managed objects in order to reflect this new functionality. This document, as with other documents issued by this working group, reflects a certain stage in the evolution of Ethernet technology. In the future, this document might be revised, or new documents might be issued by the Ethernet Interfaces and Hub MIB Working Group, in order to reflect the evolution of Ethernet technology.2. The Internet-Standard Management Framework
For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. MIB objects are generally accessed through the Simple Network Management Protocol (SNMP). Objects in the MIB are defined using the mechanisms defined in the Structure of Management Information (SMI). This memo specifies a MIB module that is compliant to the SMIv2, which is described in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580]. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119].
3. Overview
Instances of these object types represent attributes of an IEEE 802.3 MAU. Several types of MAUs are defined in the IEEE 802.3 CSMA/CD standard [IEEE802.3]. These MAUs may be connected to IEEE 802.3 repeaters or to 802.3 (Ethernet-like) interfaces. For convenience, this document refers to these devices as "repeater MAUs" and "interface MAUs." The definitions presented here are based on Section 30.5, "Layer Management for 10 Mb/s, 100 Mb/s, 1000 Mb/s, and 10 Gb/s Medium Attachment Units (MAUs)", Section 30.6, "Management for link Auto- Negotiation", and Annex 30A, "GDMO Specifications for 802.3 managed object classes" of IEEE Std. 802.3-2005 [IEEE802.3]. This specification is intended to provide for management of all types of Ethernet/802.3 MAUs.3.1. Relationship to RFC 3636
The management definitions provided in this document are intended to be a superset of those defined by RFC 3636 [RFC3636]. In order to decrease the need of updating the basic MAU MIB module due to the new MAU type, Media Available state, Auto Negotiation capability and/or Jack type introduction, all relevant object identities and textual conventions have been moved to a separate, IANA-maintained MIB module IANA-MAU-MIB, the first version of which is defined in this document. Thus when a new MAU type, Media Available state, Auto Negotiation capability, and/or Jack type is defined by the IEEE 802.3 working group, only the IANA-maintained module needs to be revised, leaving the basic MAU-MIB module defined in this document unchanged. In addition, the new definitions are added to the IANA-maintained MIB module, to support Ethernet in the First Mile (EFM) and 10GBASE-CX4 interfaces, defined in IEEE Std 802.3ah-2004 [IEEE802.3ah] and IEEE Std 802.3ak-2004 [IEEE802.3ak] respectively, now part of IEEE Std 802.3-2005 [IEEE802.3]. It should be noted that the changes made in this revision will not be entirely backward-compatible with MIB modules that currently import MAU type object identity descriptors from the MAU-MIB; such modules will need to be revised to import those DESCRIPTORS from the IANA- MAU-MIB. Similarly, any management applications that process the object identity definitions (e.g., to present the DESCRIPTION text to a user) will need to get those definitions from the IANA-MAU-MIB instead of the MAU-MIB. While it is true that changes that require such adjustments are not strictly compliant with the SMIv2 rules
governing MIB module revisions (see [RFC2578] Section 10), in this case continued high maintenance costs that would result from not making these changes make the deviation from the rules justified. It should be noted that the working group was not able to find any examples of MIB modules or management applications that would actually be negatively affected by the changes.3.2. Relationship to Other MIBs
It is assumed that an agent implementing MAU-MIB will also implement (at least) the 'system' group defined in the SNMPv2 MIB [RFC3418]. The following sections identify other MIBs that such an agent should implement.3.2.1. Relationship to the Interfaces MIB
The sections of this document that define interface MAU-related objects specify an extension to the Interfaces MIB [RFC2863]. An agent implementing these interface-MAU related objects MUST also implement the relevant groups of the ifCompliance3 MODULE-COMPLIANCE statement of the Interface MIB. The value of the object ifMauIfIndex is the same as the value of 'ifIndex' used to instantiate the interface to which the given MAU is connected. It is REQUIRED that an agent implementing the interface-MAU related objects in the MAU-MIB will also fully comply with the dot3Compliance2 MODULE-COMPLIANCE statement of the Ethernet-like Interfaces MIB, [RFC3635]. Furthermore, when the interface-MAU related objects are used to manage a 10GBASE-W PHY -- i.e., when ifMauType is equal to dot3MauType10GigBaseW or any other 10GBASE-W variant -- then the agent MUST also support the Ethernet WAN Interface Sublayer (WIS) MIB [RFC3637] and must follow the interface layering model specified therein. In that case the value of the object ifMauIfIndex is the same as the value of 'ifIndex' for the layer at the top of the stack, i.e., for the ifTable entry that has 'ifType' equal to ethernetCsmacd(6). If the interface-MAU related objects are used to manage a PHY that allows the MAU type to be changed dynamically, then the agent SHALL create ifTable, ifStackTable, and ifInvStackTable entries that pertain to the WIS when ifMauDefaultType is changed to a 10GBASEW variant (i.e., one of dot3MauType10GigBaseW, dot3MauType10GigBaseEW, dot3MauType10GigBaseLW, or dot3MauType10GigBaseSW) from any other type, and shall destroy the WIS-related entries when ifMauDefaultType is changed to a non- 10GBASE-W type. The agent SHALL also change the values of 'ifConnectorPresent' and 'ifHighSpeed' in the ifTable entry indexed by ifMauIfIndex as specified in [RFC3635] and [RFC3637] when ifMauDefaultType is manipulated in this way, but SHALL NOT otherwise alter that entry.
(Note that repeater ports are not represented as interfaces in the Interface MIB.)3.2.2. Relationship to the 802.3 Repeater MIB Module
The section of this document that defines repeater MAU-related objects specifies an extension to the 802.3 Repeater MIB defined in [RFC2108]. An agent implementing these repeater-MAU related objects MUST also comply with the snmpRptrModCompl compliance statement of the 802.3 Repeater MIB module. The values of 'rpMauGroupIndex' and 'rpMauPortIndex' used to instantiate a repeater MAU variable SHALL be the same as the values of 'rptrPortGroupIndex' and 'rptrPortIndex' used to instantiate the port that the given MAU is connected to.3.3. Management of Internal MAUs
In some situations, a MAU can be "internal" -- i.e., its functionality is implemented entirely within a device. For example, a managed repeater may contain an internal repeater-MAU and/or an internal interface-MAU through which management communications originating on one of the repeater's external ports pass, in order to reach the management agent associated with the repeater. Such internal MAUs may or may not be managed. If they are managed, objects describing their attributes should appear in the appropriate MIB subtree: dot3RpMauBasicGroup for internal repeater-MAUs and dot3IfMauBasicGroup for internal interface-MAUs.3.4. Mapping of IEEE 802.3 Managed Objects
This section contains the mapping between relevant managed objects (attributes) defined in [IEEE802.3] Clause 30, and managed objects defined in this document.
+----------------------------------+--------------------------------+ | IEEE 802.3 Managed Object | Corresponding SNMP Object | +----------------------------------+--------------------------------+ | oMAU | | +----------------------------------+--------------------------------+ | .aMAUID | rpMauIndex or ifMauIndex or | | | broadMauIndex | +----------------------------------+--------------------------------+ | .aMAUType | rpMauType or ifMauType | +----------------------------------+--------------------------------+ | .aMAUTypeList | ifMauTypeListBits | +----------------------------------+--------------------------------+ | .aMediaAvailable | rpMauMediaAvailable or | | | ifMauMediaAvailable | +----------------------------------+--------------------------------+ | .aLoseMediaCounter | rpMauMediaAvailableStateExits | | | or | | | ifMauMediaAvailableStateExits | +----------------------------------+--------------------------------+ | .aJabber | rpMauJabberState and | | | rpMauJabberingStateEnters or | | | ifMauJabberState and | | | ifMauJabberingStateEnters | +----------------------------------+--------------------------------+ | .aMAUAdminState | rpMauStatus or ifMauStatus | +----------------------------------+--------------------------------+ | .aBbMAUXmitRcvSplitType | broadMauXmtRcvSplitType | +----------------------------------+--------------------------------+ | .aBroadbandFrequencies | broadMauXmtCarrierFreq and | | | broadMauTranslationFreq | +----------------------------------+--------------------------------+ | .aFalseCarriers | rpMauFalseCarriers or | | | ifMauFalseCarriers | +----------------------------------+--------------------------------+ | .acResetMAU | rpMauStatus or ifMauStatus | +----------------------------------+--------------------------------+ | .acMAUAdminControl | rpMauStatus or ifMauStatus | +----------------------------------+--------------------------------+ | .nJabber | rpMauJabberTrap or | | | ifMauJabberTrap | +----------------------------------+--------------------------------+ | oAutoNegotiation | | +----------------------------------+--------------------------------+ | .aAutoNegID | ifMauIndex | +----------------------------------+--------------------------------+ | .aAutoNegAdminState | ifMauAutoNegAdminStatus | +----------------------------------+--------------------------------+ | .aAutoNegRemoteSignalling | ifMauAutoNegRemoteSignalling |
| .aAutoNegAutoConfig | ifMauAutoNegConfig |
+----------------------------------+--------------------------------+
| .aAutoNegLocalTechnologyAbility | ifMauAutoNegCapabilityBits |
+----------------------------------+--------------------------------+
| .aAutoNegAdvertisedTechnologyAbi | ifMauAutoNegAdvertisedBits and |
| lity | ifMauAutoNegRemoteFaultAdverti |
| | sed |
+----------------------------------+--------------------------------+
| .aAutoNegReceivedTechnologyAbili | ifMauAutoNegReceivedBits and |
| ty | ifMauAutoNegRemoteFaultReceive |
| | d |
+----------------------------------+--------------------------------+
| .acAutoNegRestartAutoConfig | ifMauAutoNegRestart |
+----------------------------------+--------------------------------+
| .acAutoNegAdminControl | ifMauAutoNegAdminStatus |
+----------------------------------+--------------------------------+
Table 1: Mapping of IEEE 802.3 Managed Objects
The following IEEE 802.3 managed objects have not been included in
the MAU-MIB for the following reasons.
+------------------------------------+------------------------------+
| IEEE 802.3 Managed Object | Reason for exclusion |
+------------------------------------+------------------------------+
| oMAU | |
+------------------------------------+------------------------------+
| .aIdleErrorCount | Only useful for 100BaseT2, |
| | which is not widely |
| | implemented. |
+------------------------------------+------------------------------+
| oAutoNegotiation | |
+------------------------------------+------------------------------+
| .aAutoNegLocalSelectorAbility | Only needed for support of |
| | isoethernet (802.9a), which |
| | is not supported by MAU-MIB. |
+------------------------------------+------------------------------+
| .aAutoNegAdvertisedSelectorAbility | |
+------------------------------------+------------------------------+
| .aAutoNegReceivedSelectorAbility | |
+------------------------------------+------------------------------+
Table 2: Unmapped IEEE 802.3 Managed Objects
3.5. Addition of New MAU Types
3.5.1. dot3MauType OBJECT-IDENTITIES
The dot3MauType OBJECT IDENTIFIER and its OBJECT-IDENTITY definitions has been moved from the MAU-MIB into the IANA-maintained IANA-MAU- MIB, the first version of which is defined in this document. When a new IEEE 802.3 MAU is defined, IANA can re-issue a version of IANA-MAU-MIB with the new dot3MauType OBJECT-IDENTITY and its matching IANAifMauTypeListBits textual convention value and, possibly, with new IANAifMauMediaAvailable, IANAifMauAutoNegCapBits, and/or IANAifJackType values. An Expert Review, as defined in RFC 2434 [RFC2434], is REQUIRED for the addition of the new MAU, Media Available states, Auto Negotiation capabilities, and/or Jack types. In some cases, new MAU types may require additional managed objects or may have side effects on the behavior of existing managed objects. In such cases a standards-track specification (which may be a new document or a revision of this document) is also REQUIRED. Any such document is REQUIRED to note any special properties of the MAU types that it defines - for example, side effects on the ifStackTable as noted in this document for 10GBASE-W MAUs.3.5.2. IANAifMauTypeListBits TEXTUAL-CONVENTION
The syntax of ifMauTypeListBits is changed to be a textual convention, such that the enumerated integer values are now defined in the textual convention IANAifMauTypeListBits, which can be re- specified (with additional values, when defined by IEEE 802.3) in the IANA-maintained MIB module without issuing a new version of this document.3.5.3. IANAifMauMediaAvailable TEXTUAL-CONVENTION
The syntax of ifMauMediaAvailable and rpMauMediaAvailable is changed to be a textual convention, such that the enumerated integer values are now defined in the textual convention IANAifMauMediaAvailable, which can be re-specified (with additional values, when defined by IEEE 802.3) in the IANA-maintained MIB module without issuing a new version of this document.
3.5.4. IANAifMauAutoNegCapBits TEXTUAL-CONVENTION
The syntax of ifMauAutoNegCapabilityBits, ifMauAutoNegCapAdvertisedBits, and ifMauAutoNegCapReceivedBits objects is changed to be a textual convention, such that the enumerated integer values are now defined in the textual convention IANAifMauAutoNegCapBits, which can be re-specified (with additional values, when defined by IEEE 802.3) in the IANA-maintained MIB module without issuing a new version of this document.3.5.5. JackType TEXTUAL-CONVENTION
The JackType Textual Convention has been deprecated in favor of the IANAifJackType defined in the IANA-maintained MIB module, so the new Jack types can be added (when defined by IEEE 802.3) without issuing a new version of this document.
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