Disman Working Group S. Chisholm Internet Draft Nortel Networks Document: draft-ietf-disman-alarm-mib-01.txt D. Romascanu Category: Standards Track Avaya Inc. Expiration Date: Sept 2001 March 2 2001 Alarm MIB Status of this Memo This document is an Internet-Draft and is in full conformance with all provisions of Section 10 of RFC2026. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF), its areas, and its working groups. Note that other groups may also distribute working documents as Internet-Drafts. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet- Drafts as reference material or to cite them other than as "work in progress." The list of current Internet-Drafts can be accessed at http://www.ietf.org/ietf/1id-abstracts.txt The list of Internet-Draft Shadow Directories can be accessed at http://www.ietf.org/shadow.html. Abstract This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes management objects used for defining and storing alarms. Table of Contents 1. The SNMP Management Framework 2. Introduction 3. Alarms Management Framework 3.1. Terminology 3.2. Alarm Management Architecture 3.3. Relation between Notifications and Alarms 3.4. Alarm Raises and Clears 3.5. Relation to Notification Log MIB 3.6. Relation to Model Specific Alarm MIBs 3.7. Alarm Notification Suppression Chisholm & Romascanu Standards Track [Page 1]
Alarm MIB March 2001 4. MIB Overview 5. Definitions 6. Example 7. Security Considerations 8. Authors' Address 9. Acknowledgements 10. References 11. Full Copyright Statement Chisholm & Romascanu Standards Track [Page 2]
Alarm MIB March 2001 1. The SNMP Management Framework The SNMP Management Framework presently consists of five major components: o An overall architecture, described in RFC 2571 [RFC2571]. o Mechanisms for describing and naming objects and events for the purpose of management. The first version of this Structure of Management Information (SMI) is called SMIv1 and described in STD 16, RFC 1155 [RFC1155], STD 16, RFC 1212 [RFC1212] and RFC 1215 [RFC1215]. The second version, called SMIv2, is described in STD 58, RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580 [RFC2580]. o Message protocols for transferring management information. The first version of the SNMP message protocol is called SNMPv1 and described in STD 15, RFC 1157 [RFC1157]. A second version of the SNMP message protocol, which is not an Internet standards track protocol, is called SNMPv2c and described in RFC 1901 [RFC1901] and RFC 1906 [RFC1906]. The third version of the message protocol is called SNMPv3 and described in RFC 1906 [RFC1906], RFC 2572 [RFC2572] and RFC 2574 [RFC2574]. o Protocol operations for accessing management information. The first set of protocol operations and associated PDU formats is described in STD 15, RFC 1157 [RFC1157]. A second set of protocol operations and associated PDU formats is described in RFC 1905 [RFC1905]. o A set of fundamental applications described in RFC 2573 [RFC2573] and the view-based access control mechanism described in RFC 2575 [RFC2575]. A more detailed introduction to the current SNMP Management Framework can be found in RFC 2570 [RFC2570]. Managed objects are accessed via a virtual information store, termed the Management Information Base or MIB. Objects in the MIB are defined using the mechanisms defined in the SMI. This memo specifies a MIB module that is ;'ant to the SMIv2. A MIB conforming to the SMIv1 can be produced through the appropriate translations. The resulting translated MIB must be semantically equivalent, except where objects or events are omitted because no translation is possible (use of Counter64). Some machine readable information in SMIv2 will be converted into textual descriptions in SMIv1 during the translation process. However, this loss of machine readable information is not considered to change the semantics of the MIB. Chisholm & Romascanu Standards Track [Page 3]
Alarm MIB March 2001 2. Introduction It is important to be able to determine current alarms on a system, so that the problems they are signalling can be fixed. This MIB provides a model-neutral method to define and store alarms. This MIB does not assume a particular alarm model, so it works with any or no model. A distributed manager managing a network with multiple alarm models, can therefore access SNMP alarm information in a consistent manner across systems. Alarms and other terms related to alarms management are defined in the following sections. A modular architecture is defined, in which the model-neutral alarm MIB can be augmented by other alarm information, defined according to more specific models that determine their behaviour and characteristics. 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. 3.Alarm Management Framework 3.1 Terminology Error A deviation of a system from normal operation. Fault Lasting error or warning condition. Event Something that happens which may be of interest to a management station. A fault, a change in status, crossing a threshold, or an external input to the system, for example. Notification Unsolicited transmissions of management information. Alarm Persistent indication of a fault. Alarm Raise The initial detection of the fault indicated by an alarm. A Notification SHOULD be sent on alarm raise. Alarm Clear The detection that the fault indicated by an alarm no longer exists. A Notification SHOULD be sent on alarm clear. Alarm Notification Suppression Chisholm & Romascanu Standards Track [Page 4]
Alarm MIB March 2001 The process of not sending out the associated SNMP notification related to a given alarm under controlled conditions. 3.2 Alarm Management Architecture This alarm definition and storage mechanism is defined independently of any model used to describe the content and behaviour of alarms within a system. Separate MIB modules that describe the alarm model can be used, in addition to this model-neutral MIB, to fully describe the alarm system. An alarm definition consists of defining the OID of the notification which SHOULD be sent out when an alarm is triggered. The alarm definition SHOULD also consist of the definition of the raise/clear relationship of the alarm. The definition SHOULD include the OID of the notification that gets sent when the alarm is cleared. 3.3 Relation between Notifications and Alarms Not all notifications are alarms. Some notifications are simply informational in nature such as those that indicate that a configuration operation has been performed on an entity. These sorts of notifications would not be represented in the alarm MIB. The Alarm MIB uses the notification space as defined in [RFC2578] in order to identify the notifications that are related with the specific alarms. However there is no assumption that the respective notifications MUST be sent for all or any of the alarms. This architecture allows for both the efficient exploitation of the body of defined notification and for the use of non-notification based systems. 3.4 Alarm Raises and Clears The raise and clear relationship between alarms is defined in the alarmDetailsTable. 3.5 Relation to Notification Log MIB The Alarm MIB is intended to complement the Notification Log MIB[RFC3014], but can be used independently. The alarmActiveTable is defined in manner similar to that of the nlmLogTable. This format allows for the storage of any NOTIFICATION that can be defined using SMI. Using the same format as the notification log MIB also simplifies operations for systems choosing to implement both MIBs. The object alarmActiveLogIndex points for each entry in the alarmActiveLogTable to the log index in the Notification Log MIB, if used. Chisholm & Romascanu Standards Track [Page 5]
Alarm MIB March 2001 If the Notification Log MIB is supported, it can be monitored by a management system as a hedge against lost alarms. 3.6 Relation to Model Specific Alarm MIBs This MIB can be used on its own, or with separately defined MIB modules that are specific to particular alarm models. One example of such a model is the ITU Alarm MIB [ITU-ALARM-MIB]. The relationship between the Alarm MIB and the other alarm model MIB modules is expressed by the following: The alarmDetailsTable has a corresponding table in the specific MIBs, with similar indexing. For each row in the specific MIB details alarm table there is one row in the alarmDetailsTable. The alarmActiveTable has a corresponding table in the specific MIBs with similar indexing. For each row in the specific MIB active alarm table there is one row in the alarmActiveTable. The alarmDetailsModelPointer object in the alarmDetailsTable points to the specific model corresponding to an alarm type. The alarmActiveModelPointer object in the alarmActiveTable points to the model specific active alarm table. 3.7 Alarm Notification Suppression Alarm notification suppression methods are particular to specific alarm models, so is therefore not covered in this document. 4. MIB Overview The alarmDetailsTable contains information that is applicable to all instances of an alarm. It can be populated at start-up with all alarms that could happen on a system or later configured by a management application. It contains all the alarms for a given system. If a notification is not represented in the alarmDetailsTable, it is not an alarm. The alarmDetailsTable provides a means of defining the raise/clear relationship between alarms. 'The object alarmDetailstype defines the type of alarm - 'raise' or 'clear'. The relationship between raise and clear alarms are defined by pairs of alarmDetailsNotificationId and alarmDetailsClearNotificationId. Different rows in the table can create 1:1, M:1, 1:N, or M:N relationships between 'clear' and 'raise' alarms.' The alarmActiveTable contains a list of alarms which are currently occurring on a system. It is intended that this table be queried upon device discovery and rediscovery to determine which alarms are currently active on the device. This allows the network management Chisholm & Romascanu Standards Track [Page 6]
Alarm MIB March 2001 station to find out about any problems that may have occurred before it started managing a particular network element, or while it was out of contact with it. The alarmActiveVariableTable contains the trap variable bindings associated with the alarms in the alarmActiveTable. The alarmActiveStatsTable contains current and total raised alarm counts as well as the time of the last alarm raise and alarm clears per named alarm list. 5. Definitions ALARM-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Integer32, Unsigned32, TimeTicks, Counter32, Counter64, IpAddress, Opaque, mib-2 FROM SNMPv2-SMI TimeStamp, DateAndTime, RowStatus, RowPointer FROM SNMPv2-TC SnmpAdminString, SnmpEngineID FROM SNMP-FRAMEWORK-MIB TimeFilter FROM RMON2-MIB MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF; alarmMIB MODULE-IDENTITY LAST-UPDATED "200103020000Z" ORGANIZATION "IETF Distributed Management Working Group" CONTACT-INFO " Sharon Chisholm Nortel Networks PO Box 3511 Station C Ottawa, Ont. K1Y 4H7 Canada schishol@nortelnetworks.com Dan Romascanu Avaya Inc. Atidim Technology Park, Bldg. #3 Tel Aviv, 61131 Israel Tel: +972-3-645-8414 Email: dromasca@avaya.com" DESCRIPTION "The MIB module describes a generic solution to define alarm details and the current list of active alarms." REVISION "200103020000Z" DESCRIPTION "Initial version, published as RFC XXXX." ::= { mib-2 xx } Chisholm & Romascanu Standards Track [Page 7]
Alarm MIB March 2001 alarmObjects OBJECT IDENTIFIER ::= { alarmMIB 1 } alarmDetails OBJECT IDENTIFIER ::= { alarmObjects 1 } alarmActive OBJECT IDENTIFIER ::= { alarmObjects 2 } alarmDetailsLastChanged OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time of the last creation, deletion or modification of an entry in the alarmDetailsTable. If the number and content of entries has been unchanged since the last re-initialization of the local network management subsystem, then this object contains a zero value." ::= { alarmDetails 1 } alarmDetailsTable OBJECT-TYPE SYNTAX SEQUENCE OF AlarmDetailsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of information about possible alarms on the system." ::= { alarmDetails 2 } alarmDetailsEntry OBJECT-TYPE SYNTAX AlarmDetailsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Entries appear in this table for each possible alarm." INDEX { alarmListName, alarmDetailsIndex } ::= { alarmDetailsTable 1 } AlarmDetailsEntry ::= SEQUENCE { alarmDetailsIndex Unsigned32, alarmDetailsNotificationId OBJECT IDENTIFIER, alarmDetailsClearNotificationId OBJECT IDENTIFIER, alarmDetailsType INTEGER, alarmDetailsModelPointer RowPointer, alarmDetailsRowStatus RowStatus } alarmDetailsIndex OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only Chisholm & Romascanu Standards Track [Page 8]
Alarm MIB March 2001 STATUS current DESCRIPTION "A integer which acts as an index of entries within the named alarm list. " ::= { alarmDetailsEntry 1 } alarmDetailsNotificationId OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-write STATUS current DESCRIPTION "The NOTIFICATION-TYPE object identifier of this alarm raise. If this entry corresponds to a clear alarm, then this object is the NOTIFICATION-TYPE object identifier of the alarm clear." ::= { alarmDetailsEntry 2 } alarmDetailsClearNotificationId OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-write STATUS current DESCRIPTION "The NOTIFICATION-TYPE object identifier of the alarm clear associated with this alarm. If this entry corresponds to a clear alarm, then this object should be one of the NOTIFICATION-TYPE object identifier of the alarm raise. If this alarm has no corresponding clear alarm, then this object is '0.0'." ::= { alarmDetailsEntry 3 } alarmDetailsType OBJECT-TYPE SYNTAX INTEGER { other (1), clear (2), raise (3) } MAX-ACCESS read-write STATUS current DESCRIPTION " Indicates whether this is a raise or a clear alarm." ::= { alarmDetailsEntry 4 } alarmDetailsModelPointer OBJECT-TYPE SYNTAX RowPointer MAX-ACCESS read-write STATUS current DESCRIPTION "If no additional, model-specific, alarm MIB is supported by the system this object is `0.0'. When a model-specific alarm MIB is supported, this object is the instance pointer to the specific Chisholm & Romascanu Standards Track [Page 9]
Alarm MIB March 2001 model-specific alarm definition." ::= { alarmDetailsEntry 5 } alarmDetailsRowStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "Control for creating and deleting entries. Entries may be modified while active. This row can not be deleted while it is being referenced by a value of alarmActiveDetailsIndex." ::= { alarmDetailsEntry 6 } -- Active Alarm Table -- alarmActiveLastChanged OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time of the last creation or deletion of an entry in the alarmActiveTable. If the number of entries has been unchanged since the last re-initialization of the local network management subsystem, then this object contains a zero value." ::= { alarmActive 1 } alarmActiveTable OBJECT-TYPE SYNTAX SEQUENCE OF AlarmActiveEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of Active Alarms entries." ::= { alarmActive 2 } alarmActiveEntry OBJECT-TYPE SYNTAX AlarmActiveEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Entries appear in this table when alarms are raised. They are removed when the alarm is cleared." INDEX { alarmListName, alarmActiveTimeFilter, alarmActiveIndex } ::= { alarmActiveTable 1 } AlarmActiveEntry ::= SEQUENCE { alarmListName SnmpAdminString, alarmActiveTimeFilter TimeFilter, alarmActiveIndex Unsigned32, Chisholm & Romascanu Standards Track [Page 10]
Alarm MIB March 2001 alarmActiveTime TimeStamp, alarmActiveDateAndTime DateAndTime, alarmActiveEngineID SnmpEngineID, alarmActiveEngineAddress IpAddress, alarmActiveContextEngineID SnmpEngineID, alarmActiveContextName SnmpAdminString, alarmActiveVariables Unsigned32, alarmActiveNotificationID OBJECT IDENTIFIER, alarmActiveLogIndex Unsigned32, alarmActiveDetailsIndex Unsigned32, alarmActiveModelPointer RowPointer } alarmListName OBJECT-TYPE SYNTAX SnmpAdminString (SIZE(0..32)) MAX-ACCESS not-accessible STATUS current DESCRIPTION "The name of the list of alarms. This is the same as nlmLogName if the Nofication Log MIB [RFC3014] is supported. An implementation may allow multiple named alarm lists, up to some implementation-specific limit (which may be none). A zero-length list name is reserved for creation and deletion by the managed system, and MUST be used as the default log name by systems that do not support named alarm lists." ::= { alarmActiveEntry 1 } alarmActiveTimeFilter OBJECT-TYPE SYNTAX TimeFilter MAX-ACCESS read-only STATUS current DESCRIPTION "A TimeFilter for this entry. Allows GetNext and GetBulk to find flow table rows which have changed since a specified value of sysUptime. See the description of TimeFilter TC in [RFC2021] for more information." ::= { alarmActiveEntry 2 } alarmActiveIndex OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "A monotonically increasing integer which acts as the index of entries within the named alarm list. It wraps back to 1 after it reaches its maximum value." ::= { alarmActiveEntry 3 } alarmActiveTime OBJECT-TYPE SYNTAX TimeStamp Chisholm & Romascanu Standards Track [Page 11]
Alarm MIB March 2001 MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime when the alarm occurred. Alarms tend to get cleared and re-raised if still applicable at reboot, so this value tends to be a valid sysUptime. In the case where the alarms are not cleared at reboot, and the alarm occurred before the most recent management system initialization, this object value MUST be set to zero." ::= { alarmActiveEntry 4 } alarmActiveDateAndTime OBJECT-TYPE SYNTAX DateAndTime MAX-ACCESS read-only STATUS current DESCRIPTION "The local date and time when the alarm occurred, instantiated only by systems that have date and time capability." ::= { alarmActiveEntry 5 } alarmActiveEngineID OBJECT-TYPE SYNTAX SnmpEngineID MAX-ACCESS read-only STATUS current DESCRIPTION "The identification of the SNMP engine at which the alarm originated. If the alarm list can contain Notifications from only one engine or the Trap is from an SNMPv1 system, this object is a zero length string." ::= { alarmActiveEntry 6 } alarmActiveEngineAddress OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The IP Address of the SNMP engine on which the alarm is occuring. This is used to identify the source of an SNMPv1 trap, since an alarmActiveEngineId cannot be extracted from the SNMPv1 trap pdu. This object MUST always be instantiated, even if the list can contain alarms from only one engine." ::= { alarmActiveEntry 7 } alarmActiveContextEngineID OBJECT-TYPE SYNTAX SnmpEngineID MAX-ACCESS read-only STATUS current DESCRIPTION "If the alarm is occurring on a device using a protocol which Chisholm & Romascanu Standards Track [Page 12]
Alarm MIB March 2001 has a contextEngineID element like SNMPv3, this object has that value. Otherwise its value is a zero-length string." ::= { alarmActiveEntry 8 } alarmActiveContextName OBJECT-TYPE SYNTAX SnmpAdminString MAX-ACCESS read-only STATUS current DESCRIPTION "The name of the SNMP MIB context from which the alarm came. For SNMPv1 Traps this is the community string from the Trap. If the alarm's source SNMP engine is known not to support multiple contexts, this object is a zero length string." ::= { alarmActiveEntry 9 } alarmActiveVariables OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of variables in alarmActiveVariableTable for this Notification." ::= { alarmActiveEntry 10 } alarmActiveNotificationID OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-only STATUS current DESCRIPTION "The NOTIFICATION-TYPE object identifier of the alarm that is occurring." ::= { alarmActiveEntry 11 } alarmActiveLogIndex OBJECT-TYPE SYNTAX Unsigned32 (0..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION "This number MUST be the same as the log index of the applicable row in the notification log MIB, if it exists. If no log index applies to the trap, then this object MUST have the value of 0." ::= { alarmActiveEntry 12 } alarmActiveDetailsIndex OBJECT-TYPE SYNTAX Unsigned32 (0..4294967295) MAX-ACCESS read-only STATUS current DESCRIPTION Chisholm & Romascanu Standards Track [Page 13]
Alarm MIB March 2001 "The index of the corresponding row in an alarm details table." ::= { alarmActiveEntry 13 } alarmActiveModelPointer OBJECT-TYPE SYNTAX RowPointer MAX-ACCESS read-write STATUS current DESCRIPTION "If no additional, model-specific, alarm MIB is supported by the system this object is `0.0'. When a model-specific alarm MIB is supported, this object is the instance pointer to the specific model-specific active alarm list." ::= { alarmActiveEntry 14 } -- Active Alarm Variable Table -- alarmActiveVariableTable OBJECT-TYPE SYNTAX SEQUENCE OF AlarmActiveVariableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A table of variables to go with active alarm entries." ::= { alarmActive 3 } alarmActiveVariableEntry OBJECT-TYPE SYNTAX AlarmActiveVariableEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Entries appear in this table when there are variables in the varbind list of a corresponding alarm in alarmActiveTable." INDEX { alarmListName, alarmActiveIndex, alarmActiveVariableIndex } ::= { alarmActiveVariableTable 1 } AlarmActiveVariableEntry ::= SEQUENCE { alarmActiveVariableIndex Unsigned32, alarmActiveVariableID OBJECT IDENTIFIER, alarmActiveVariableValueType INTEGER, alarmActiveVariableCounter32Val Counter32, alarmActiveVariableUnsigned32Val Unsigned32, alarmActiveVariableTimeTicksVal TimeTicks, alarmActiveVariableInteger32Val Integer32, alarmActiveVariableOctetStringVal OCTET STRING, alarmActiveVariableIpAddressVal IpAddress, alarmActiveVariableOidVal OBJECT IDENTIFIER, alarmActiveVariableCounter64Val Counter64, alarmActiveVariableOpaqueVal Opaque } Chisholm & Romascanu Standards Track [Page 14]
Alarm MIB March 2001 alarmActiveVariableIndex OBJECT-TYPE SYNTAX Unsigned32 (1..4294967295) MAX-ACCESS not-accessible STATUS current DESCRIPTION "A monotonically increasing integer, starting at 1 for a given alarmActiveIndex, for indexing variables within the active alarm list." ::= { alarmActiveVariableEntry 1 } alarmActiveVariableID OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-only STATUS current DESCRIPTION "The variable's object identifier." ::= { alarmActiveVariableEntry 2 } alarmActiveVariableValueType OBJECT-TYPE SYNTAX INTEGER { counter32(1), unsigned32(2), timeTicks(3), integer32(4), ipAddress(5), octetString(6), objectId(7), counter64(8), opaque(9) } MAX-ACCESS read-only STATUS current DESCRIPTION "The type of the value. One and only one of the value objects that follow is used, based on this type." ::= { alarmActiveVariableEntry 3 } alarmActiveVariableCounter32Val OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'counter32'." ::= { alarmActiveVariableEntry 4 } alarmActiveVariableUnsigned32Val OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'unsigned32'." ::= { alarmActiveVariableEntry 5 } alarmActiveVariableTimeTicksVal OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'timeTicks'." ::= { alarmActiveVariableEntry 6 } Chisholm & Romascanu Standards Track [Page 15]
Alarm MIB March 2001 alarmActiveVariableInteger32Val OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'integer32'." ::= { alarmActiveVariableEntry 7 } alarmActiveVariableOctetStringVal OBJECT-TYPE SYNTAX OCTET STRING MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'octetString'." ::= { alarmActiveVariableEntry 8 } alarmActiveVariableIpAddressVal OBJECT-TYPE SYNTAX IpAddress MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'ipAddress'." ::= { alarmActiveVariableEntry 9 } alarmActiveVariableOidVal OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'objectId'." ::= { alarmActiveVariableEntry 10 } alarmActiveVariableCounter64Val OBJECT-TYPE SYNTAX Counter64 MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'counter64'." ::= { alarmActiveVariableEntry 11 } alarmActiveVariableOpaqueVal OBJECT-TYPE SYNTAX Opaque MAX-ACCESS read-only STATUS current DESCRIPTION "The value when alarmActiveVariableType is 'opaque'." ::= { alarmActiveVariableEntry 12 } -- Statistics -- alarmActiveStatsTable OBJECT-TYPE Chisholm & Romascanu Standards Track [Page 16]
Alarm MIB March 2001 SYNTAX SEQUENCE OF AlarmActiveStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "This table represents the alarm statistics information." ::= { alarmActive 4 } alarmActiveStatsEntry OBJECT-TYPE SYNTAX AlarmActiveStatsEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "Statistics on the current active alarms." INDEX { alarmListName } ::= { alarmActiveStatsTable 1 } AlarmActiveStatsEntry ::= SEQUENCE { alarmActiveStatsCurrentActive Unsigned32, alarmActiveStatsTotalActive Unsigned32, alarmActiveStatsLastRaise TimeTicks, alarmActiveStatsLastClear TimeTicks } alarmActiveStatsCurrentActive OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of currently active alarms on the system." ::= { alarmActiveStatsEntry 1 } alarmActiveStatsTotalActive OBJECT-TYPE SYNTAX Unsigned32 MAX-ACCESS read-only STATUS current DESCRIPTION "The total number of active alarms since system restart." ::= { alarmActiveStatsEntry 2 } alarmActiveStatsLastRaise OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current Chisholm & Romascanu Standards Track [Page 17]
Alarm MIB March 2001 DESCRIPTION "The value of sysUpTime at the time of the last alarm raise for this alarm list. If no alarm raises have occurred since the last re-initialization of the local network management subsystem, then this object contains a zero value." ::= { alarmActiveStatsEntry 3 } alarmActiveStatLastClear OBJECT-TYPE SYNTAX TimeTicks MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time of the last alarm clear for this alarm list. If no alarm clears have occurred since the last re-initialization of the local network management subsystem, then this object contains a zero value." ::= { alarmActiveStatsEntry 4 } -- Conformance alarmConformance OBJECT IDENTIFIER ::= { alarmMIB 2 } alarmCompliances OBJECT IDENTIFIER ::= { alarmConformance 1 } alarmCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for systems supporting the Alarm MIB." MODULE -- this module MANDATORY-GROUPS { alarmActiveGroup, alarmDetailsGroup } ::= { alarmCompliances 1 } alarmGroups OBJECT IDENTIFIER ::= { alarmConformance 2 } alarmDetailsGroup OBJECT-GROUP OBJECTS { alarmDetailsLastChanged, alarmDetailsIndex, alarmDetailsNotificationId, alarmDetailsClearNotificationId, alarmDetailsType, alarmDetailsModelPointer, alarmDetailsRowStatus } STATUS current DESCRIPTION Chisholm & Romascanu Standards Track [Page 18]
Alarm MIB March 2001 "Alarm details list group." ::= { alarmGroups 1} alarmActiveGroup OBJECT-GROUP OBJECTS { alarmActiveLastChanged, alarmListName, alarmActiveTimeFilter, alarmActiveIndex, alarmActiveTime, alarmActiveDateAndTime, alarmActiveEngineID, alarmActiveEngineAddress, alarmActiveContextEngineID, alarmActiveContextName, alarmActiveVariables, alarmActiveNotificationID, alarmActiveDetailsIndex, alarmActiveLogIndex, alarmActiveModelPointer, alarmActiveVariableIndex, alarmActiveVariableID, alarmActiveVariableValueType, alarmActiveVariableCounter32Val, alarmActiveVariableUnsigned32Val, alarmActiveVariableTimeTicksVal, alarmActiveVariableInteger32Val, alarmActiveVariableOctetStringVal, alarmActiveVariableIpAddressVal, alarmActiveVariableOidVal, alarmActiveVariableCounter64Val, alarmActiveVariableOpaqueVal } STATUS current DESCRIPTION "Active Alarm list group." ::= { alarmGroups 2} alarmActiveStatsGroup OBJECT-GROUP OBJECTS { alarmActiveStatsTotalActive, alarmActiveStatsCurrentActive, alarmActiveStatsLastRaise, alarmActiveStatsLastClear } STATUS current DESCRIPTION " Active alarm summary group." ::= { alarmGroups 3} Chisholm & Romascanu Standards Track [Page 19]
Alarm MIB March 2001 END 6. Example Define the following Object: acmeWidgetIndex OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "A unique number which identifies a particular Widget." ::= { acmeWidgetEntry 1 } Define the following three traps: acmeWidgetTemperatureCritical NOTIFICATION-TYPE OBJECTS { acmeWidgetIndex } STATUS current DESCRIPTION "This trap indicates that the indicated widget has reached a critical temperature." ::= { acmeWidgetTraps 1 } acmeWidgetTemperatureNormal NOTIFICATION-TYPE OBJECTS { acmeWidgetIndex } STATUS current DESCRIPTION "This trap indicates that the indicated widget has reached a normal temperature." ::= { acmeWidgetTraps 2 } dsx3LineStatusChange NOTIFICATION-TYPE OBJECTS { dsx3LineStatus, dsx3LineStatusLastChange } STATUS current DESCRIPTION "A dsx3LineStatusChange trap is sent when the value of an instance of dsx3LineStatus changes. It can be utilized by an NMS to trigger polls. When the line status change results in a lower level line status change (i.e. ds1), then no traps for the lower level are sent." ::= { ds3Traps 0 1 } 0. Active alarm table empty and nothing in notification log ___________________________ _____________________ | alarmActiveTable | | nlmLogTable | |---------------------------| |---------------------| | alarmActiveIndex | alarm | | nlmLogIndex | alarm | |---------------------------| |---------------------| |___________________________| |_____________________| Chisholm & Romascanu Standards Track [Page 20]
Alarm MIB March 2001 1. Temperature of widget 2 goes critical __________________________________________________ | alarmActiveTable | |--------------------------------------------------| | alarmActiveIndex | alarm | |--------------------------------------------------| | 1 | acmeWidgetTemperatureCritical | |__________________________________________________| _____________________________________________ | nlmLogTable | |---------------------------------------------| | nlmLogIndex | alarm | |---------------------------------------------| | 1 | acmeWidgetTemperatureCritical | |_____________________________________________| 2. the value of an instance of dsx3LineStatus changes __________________________________________________ | alarmActiveTable | |--------------------------------------------------| | alarmActiveIndex | alarm | |--------------------------------------------------| | 1 | acmeWidgetTemperatureCritical | |__________________________________________________| _____________________________________________ | nlmLogTable | |---------------------------------------------| | nlmLogIndex | alarm | |---------------------------------------------| | 1 | acmeWidgetTemperatureCritical | | 2 | dsx3LineStatusChange | |_____________________________________________| Chisholm & Romascanu Standards Track [Page 21]
Alarm MIB March 2001 3. Temperature of widget 2 goes back to normal __________________________________________________ | alarmActiveTable | |--------------------------------------------------| | alarmActiveIndex | alarm | |--------------------------------------------------| |__________________________________________________| _____________________________________________ | nlmLogTable | |---------------------------------------------| | nlmLogIndex | alarm | |---------------------------------------------| | 1 | acmeWidgetTemperatureCritical | | 2 | bgpBackwardTransition | | 3 | acmeWidgetTemperatureNormal | |_____________________________________________| 7. Security Considerations There are a number of management objects defined in this MIB that have a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. SNMPv1 by itself is not a secure environment. Even if the network itself is secure (for example by using IPSec), even then, there is no control as to who on the secure network is allowed to access and GET/SET (read/change/create/delete) the objects in this MIB. It is recommended that the implementers consider the security features as provided by the SNMPv3 framework. Specifically, the use of the User-based Security Model RFC 2574 [RFC2574] and the View- based Access Control Model RFC 2575 [RFC2575] is recommended. It is then a customer/user responsibility to ensure that the SNMP entity giving access to an instance of this MIB, is properly configured to give access to the objects only to those principals (users) that have legitimate rights to indeed GET or SET (change/create/delete) them. 8. Authors' Address Sharon Chisholm Nortel Networks PO Box 3511, Station C Ottawa, Ontario, K1Y 4H7 Chisholm & Romascanu Standards Track [Page 22]
Alarm MIB March 2001 Canada Email: schishol@nortelnetworks.com Dan Romascanu Avaya Inc. Atidim Technology Park, Bldg. #3 Tel Aviv, 61131 Israel Tel: +972-3-645-8414 Email: dromasca@avaya.com 9. Acknowledgements This document is a product of the DISMAN Working Group. ... 10. References [RFC2571] Harrington, D., Presuhn, R., and B. Wijnen, "An Architecture for Describing SNMP Management Frameworks", RFC 2571, April 41999. [RFC1155] Rose, M., and K. McCloghrie, "Structure and Identification of Management Information for TCP/IP-based Internets", STD 16, RFC 1155, May 1990. [RFC1212] Rose, M., and K. McCloghrie, "Concise MIB Definitions", STD 16, RFC 1212, March 1991. [RFC1215] M. Rose, "A Convention for Defining Traps for use with the SNMP", RFC 1215, March 1991. [RFC2578] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Structure of Management Information Version 2 (SMIv2)", STD 58, RFC 2578, April 1999. [RFC2579] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Textual Conventions for SMIv2", STD 58, RFC 2579, April 1999. [RFC2580] McCloghrie, K., Perkins, D., Schoenwaelder, J., Case, J., Rose, M., and S. Waldbusser, "Conformance Statements for SMIv2", STD 58, RFC 2580, April 1999. [RFC1157] Case, J., Fedor, M., Schoffstall, M., and J. Davin, "Simple Network Management Protocol", STD 15, RFC 1157, May 1990. [RFC1901] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901, January Chisholm & Romascanu Standards Track [Page 23]
Alarm MIB March 2001 1996. [RFC1906] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Transport Mappings for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1906, January 1996. [RFC2572] Case, J., Harrington D., Presuhn R., and B. Wijnen, "Message Processing and Dispatching for the Simple Network Management Protocol (SNMP)", RFC 2572, April 1999. [RFC2574] Blumenthal, U., and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2574, April 1999. [RFC1905] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1905, January 1996. [RFC2573] Levi, D., Meyer, P., and B. Stewart, "SNMPv3 Applications", RFC 2573, April 1999. [RFC2575] Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2575, April 1999. [RFC2570] Case, J., Mundy, R., Partain, D., and B. Stewart, "Introduction to Version 3 of the Internet-standard Network Management Framework", RFC 2570, April 1999. [RFC2021] Waldbusser, S. "Remote Network Monitoring Management Information Base Version 2 using SMIv2", RFC 2021, January 1997 [RFC2274] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM) for version 3 of the Simple Network Management Protocol (SNMPv3)", RFC 2274, January 1998. [RFC2275] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access Control Model (VACM) for the Simple Network Management Protocol (SNMP)", RFC 2275, January 1998. [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997. [RFC3014] Stewart, B., Kavasseri, R., "Notification Log MIB, RFC 3014, November 2000 [ITU-ALARM-MIB] Chisholm, S., Romascanu, D., "ITU Alarm MIB, Work in Progress Chisholm & Romascanu Standards Track [Page 24]
Alarm MIB March 2001 11. Full Copyright Statement Copyright (C) The Internet Society (2001). All Rights Reserved. This document and translations of it may be copied and furnished to others, and derivative works that comment on or otherwise explain it or assist in its implementation may be prepared, copied, published and distributed, in whole or in part, without restriction of any kind, provided that the above copyright notice and this paragraph are included on all such copies and derivative works. However, this document itself may not be modified in any way, such as by removing the copyright notice or references to the Internet Society or other Internet organizations, except as needed for the purpose of developing Internet standards in which case the procedures for copyrights defined in the Internet Standards process must be followed, or as required to translate it into languages other than English. The limited permissions granted above are perpetual and will not be revoked by the Internet Society or its successors or assigns. This document and the information contained herein is provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Chisholm & Romascanu Standards Track [Page 25]
