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Network Working Group J. Case
Request for Comments: 1451 SNMP Research, Inc.
K. McCloghrie
Hughes LAN Systems
M. Rose
Dover Beach Consulting, Inc.
S. Waldbusser
Carnegie Mellon University
April 1993
Manager-to-Manager
Management Information Base
Status of this Memo
This RFC specifes an IAB standards track protocol for the
Internet community, and requests discussion and suggestions
for improvements. Please refer to the current edition of the
"IAB Official Protocol Standards" for the standardization
state and status of this protocol. Distribution of this memo
is unlimited.
Table of Contents
1 Introduction .......................................... 2
1.1 A Note on Terminology ............................... 2
2 Overview .............................................. 3
2.1 A SNMPv2 Entity Acting in a Dual Role ............... 3
2.2 Alarms, Events, and Notifications ................... 3
2.3 Access Control ...................................... 4
3 Definitions ........................................... 6
3.1 The Alarm Group ..................................... 7
3.1.1 Alarm-Related Notifications ....................... 20
3.2 The Event Group ..................................... 21
3.3 Conformance Information ............................. 29
3.3.1 Compliance Statements ............................. 29
3.3.2 Units of Conformance .............................. 29
4 Acknowledgements ...................................... 31
5 References ............................................ 35
6 Security Considerations ............................... 36
7 Authors' Addresses .................................... 36
Case, McCloghrie, Rose & Waldbusser [Page 1]
RFC 1451 Manager-to-Manager MIB April 1993 1. Introduction A network management system contains: several (potentially many) nodes, each with a processing entity, termed an agent, which has access to management instrumentation; at least one management station; and, a management protocol, used to convey management information between the agents and management stations. Operations of the protocol are carried out under an administrative framework which defines both authentication and authorization policies. Network management stations execute management applications which monitor and control network elements. Network elements are devices such as hosts, routers, terminal servers, etc., which are monitored and controlled through access to their management information. Management information is viewed as a collection of managed objects, residing in a virtual information store, termed the Management Information Base (MIB). Collections of related objects are defined in MIB modules. These modules are written using a subset of OSI's Abstract Syntax Notation One (ASN.1) [1], termed the Structure of Management Information (SMI) [2]. The management protocol, version 2 of the Simple Network Management Protocol [3], provides for the exchange of messages which convey management information between the agents and the management stations, including between management stations. It is the purpose of this document to define managed objects which describe the behavior of a SNMPv2 entity acting in both a manager role and an agent role. 1.1. A Note on Terminology For the purpose of exposition, the original Internet-standard Network Management Framework, as described in RFCs 1155, 1157, and 1212, is termed the SNMP version 1 framework (SNMPv1). The current framework is termed the SNMP version 2 framework (SNMPv2). Case, McCloghrie, Rose & Waldbusser [Page 2]
RFC 1451 Manager-to-Manager MIB April 1993 2. Overview The purpose of this MIB is to provide the means for coordination between multiple management stations. That is, the means by which the controlling and monitoring functions of network management can be distributed amongst multiple management stations. Such distribution facilitates the scaling of network management solutions based on the SNMPv2 to meet the needs of very large networks, or of networks composed of multiple interconnected administrations. Specifically, this MIB provides the means for one management station to request management services from another management station. 2.1. A SNMPv2 Entity Acting in a Dual Role A management station providing services to other management station(s), is a SNMPv2 entity which acts in the dual role of both manager and agent; the requests for service are received through acting in an agent role (with respect to the managed objects defined in this MIB), and the requested services are performed through acting in a manager role. 2.2. Alarms, Events, and Notifications In this initial version, this MIB defines the concepts of "alarms", "events", and "notifications". Each alarm is a specific condition detected through the periodic (at a configured sampling interval) monitoring of the value of a specific management information variable. An example of an alarm condition is when the monitored variable falls outside a configured range. Each alarm condition triggers an event, and each event can cause (one or more) notifications to be reported to other management stations using the Inform-Request PDU. Specifically, this MIB defines three MIB tables and a number of scalar objects. The three tables are: the Alarm Table, the Event Table, and the Notification Table. Case, McCloghrie, Rose & Waldbusser [Page 3]
RFC 1451 Manager-to-Manager MIB April 1993 2.3. Access Control The Administrative Model for SNMPv2 document [4] includes an access control model, which must not be subverted by allowing access to management information variables via the Alarm table. That is, access to a monitored variable via the Alarm table must be controlled according to the identity of the management station accessing the particular entry in the Alarm table. An entry in the Alarm table provides the means to configure the sampling of the value of a MIB variable in the MIB view associated with the specified context (which can refer to object resources that are either local or remote). The sampling is done by (conceptually or actually) issuing a SNMPv2 request to retrieve the variable's value. This request is authenticated and/or protected from disclosure according to a source party and a destination party pair which has access to the indicated context. Thus, to provide the required access control, the initial MIB view assigned, by convention, to parties on SNMPv2 entities that implement the snmpAlarmTable, must include the component: viewSubtree = { snmpAlarm } viewStatus = { excluded } viewMask = { ''H } Then, the MIB view associated with the context, requestContext, accessible by a requesting management station, can be configured to include specific Alarm table entries -- the ones associated with those contexts to which the requesting management station has access. In particular, to provide a requestContext with access to the sampling context sampleContext, the following family of view subtrees would be included for the requestContext on the SNMPv2 entity acting in a dual role: { snmpAlarmEntry WILDCARD sampleContext } Which would be configured in the party MIB [5] as: contextIdentity = { requestContext } contextViewIndex = { ViewIndex } Case, McCloghrie, Rose & Waldbusser [Page 4]
RFC 1451 Manager-to-Manager MIB April 1993 viewIndex = { ViewIndex } viewSubtree = { snmpAlarmEntry 0 sampleContext } viewStatus = { included } viewMask = { 'FFEF'H } -- specifies wildcard for column Case, McCloghrie, Rose & Waldbusser [Page 5]
RFC 1451 Manager-to-Manager MIB April 1993 3. Definitions SNMPv2-M2M-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, Integer32, Counter32, snmpModules FROM SNMPv2-SMI DisplayString, InstancePointer, RowStatus, TimeStamp FROM SNMPv2-TC MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF contextIdentity FROM SNMPv2-PARTY-MIB; snmpM2M MODULE-IDENTITY LAST-UPDATED "9304010000Z" ORGANIZATION "IETF SNMPv2 Working Group" CONTACT-INFO " Steven Waldbusser Postal: Carnegie Mellon University 4910 Forbes Ave Pittsburgh, PA 15213 Tel: +1 412 268 6628 Fax: +1 412 268 4987 E-mail: waldbusser@cmu.edu" DESCRIPTION "The Manager-to-Manager MIB module." ::= { snmpModules 2 } snmpM2MObjects OBJECT IDENTIFIER ::= { snmpM2M 1 } Case, McCloghrie, Rose & Waldbusser [Page 6]
RFC 1451 Manager-to-Manager MIB April 1993 -- the alarm group -- -- a collection of objects allowing the description and -- configuration of threshold alarms from a SNMPv2 entity -- acting in a dual role. snmpAlarm OBJECT IDENTIFIER ::= { snmpM2MObjects 1 } -- This Alarm mechanism periodically takes statistical samples -- from variables available via SNMPv2 and compares them to -- thresholds that have been configured. The alarm table -- stores configuration entries that each define a variable, -- polling period, and threshold parameters. If a sample is -- found to cross the threshold values, an event is generated. -- Only variables that resolve to an ASN.1 primitive type of -- INTEGER (Integer32, Counter32, Gauge32, TimeTicks, -- Counter64, or UInteger32) may be monitored in this way. -- -- This function has a hysteresis mechanism to limit the -- generation of events. This mechanism generates one event -- as a threshold is crossed in the appropriate direction. No -- more events are generated for that threshold until the -- opposite threshold is crossed. -- -- In the case of sampling a deltaValue, an entity may -- implement this mechanism with more precision if it takes a -- delta sample twice per period, each time comparing the sum -- of the latest two samples to the threshold. This allows -- the detection of threshold crossings that span the sampling -- boundary. Note that this does not require any special -- configuration of the threshold value. It is suggested that -- entities implement this more precise algorithm. -- Case, McCloghrie, Rose & Waldbusser [Page 7]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmNextIndex OBJECT-TYPE SYNTAX INTEGER (0..65535) MAX-ACCESS read-only STATUS current DESCRIPTION "The index number of the next appropriate unassigned entry in the snmpAlarmTable. The value 0 indicates that no unassigned entries are available. A management station should create new entries in the snmpAlarmTable using this algorithm: first, issue a management protocol retrieval operation to determine the value of snmpAlarmNextIndex; and, second, issue a management protocol set operation to create an instance of the snmpAlarmStatus object setting its value to `createAndGo' or `createAndWait' (as specified in the description of the RowStatus textual convention)." ::= { snmpAlarm 1 } snmpAlarmTable OBJECT-TYPE SYNTAX SEQUENCE OF SnmpAlarmEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of snmpAlarm entries." ::= { snmpAlarm 2 } snmpAlarmEntry OBJECT-TYPE SYNTAX SnmpAlarmEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of parameters that set up a periodic sampling query to check for alarm conditions. The contextIdentity included in the INDEX clause is the context to which the sampling queries are directed." INDEX { contextIdentity, snmpAlarmIndex } ::= { snmpAlarmTable 1 } Case, McCloghrie, Rose & Waldbusser [Page 8]
RFC 1451 Manager-to-Manager MIB April 1993 SnmpAlarmEntry ::= SEQUENCE { snmpAlarmIndex INTEGER, snmpAlarmVariable InstancePointer, snmpAlarmInterval Integer32, snmpAlarmSampleType INTEGER, snmpAlarmValue Integer32, snmpAlarmStartupAlarm INTEGER, snmpAlarmRisingThreshold Integer32, snmpAlarmFallingThreshold Integer32, snmpAlarmRisingEventIndex INTEGER, snmpAlarmFallingEventIndex INTEGER, snmpAlarmUnavailableEventIndex INTEGER, snmpAlarmStatus RowStatus } snmpAlarmIndex OBJECT-TYPE SYNTAX INTEGER (1..65535) MAX-ACCESS not-accessible STATUS current DESCRIPTION "An index that uniquely identifies an entry in the snmpAlarm table for a particular sampling context. Each such entry defines a diagnostic sample at a particular interval for a variable in the particular context's object resources." ::= { snmpAlarmEntry 1 } Case, McCloghrie, Rose & Waldbusser [Page 9]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmVariable OBJECT-TYPE SYNTAX InstancePointer MAX-ACCESS read-create STATUS current DESCRIPTION "The object identifier of the particular variable to be sampled. Only variables that resolve to an ASN.1 primitive type of INTEGER (Integer32, Counter32, Gauge32, TimeTicks, Counter64, or UInteger32) may be sampled. If it is detected by an error response of authorizationError, noSuchObject, or noSuchInstance that the variable name of an established snmpAlarmEntry is no longer available in the sampling context, a single snmpObjectUnavailableAlarm event is generated and the status of this snmpAlarmEntry is set to `destroy'. Likewise, if the syntax of the variable retrieved by the query is not Integer32, Counter32, Gauge32, TimeTicks, Counter64, or UInteger32, the same actions will be taken. If the SNMPv2 entity acting in a dual role detects that the sampled value can not be obtained due to lack of response to management queries, it should either: 1) Set the status of this snmpAlarmEntry to `destroy', if it is determined that further communication is not possible; or, 2) Delete the associated snmpAlarmValue instance (but not the entire conceptual row), and continue to attempt to sample the variable and recreate the associated snmpAlarmValue instance should communication be reestablished. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." Case, McCloghrie, Rose & Waldbusser [Page 10]
RFC 1451 Manager-to-Manager MIB April 1993 ::= { snmpAlarmEntry 2 } snmpAlarmInterval OBJECT-TYPE SYNTAX Integer32 UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "The interval in seconds over which the data is sampled and compared with the rising and falling thresholds. When setting this object and the sampling type is `deltaValue', care should be taken to ensure that the change during this interval of the variable being sampled will not exceed the (-2^31...2^31-1) range of the snmpAlarmValue. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 3 } Case, McCloghrie, Rose & Waldbusser [Page 11]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmSampleType OBJECT-TYPE SYNTAX INTEGER { absoluteValue(1), deltaValue(2) } MAX-ACCESS read-create STATUS current DESCRIPTION "The method of sampling the selected variable and calculating the value to be compared against the thresholds. If the value of this object is `absoluteValue', the value of the selected variable at the end of the sampling interval will be compared directly with both the snmpAlarmRisingThreshold and the snmpAlarmFallingThreshold values. If the value of this object is `deltaValue', the value of the selected variable at the end of the sampling interval will be subtracted from its value at the end of the previous sampling interval, and the difference compared with both the snmpAlarmRisingThreshold and the snmpAlarmFallingThreshold values. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." DEFVAL { deltaValue } ::= { snmpAlarmEntry 4 } Case, McCloghrie, Rose & Waldbusser [Page 12]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmValue OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The value of the statistic during the last sampling period. The value during the current sampling period is not made available until the period is completed. If the value of the statistic does not fit in the signed 32 bit representation of this object, it should be truncated in an implementation specific manner. Note that if the associated snmpAlarmSampleType is set to `deltaValue', the value of this object is the difference in the sampled variable since the last sample. This object will be created by the SNMPv2 entity acting in a dual role when this entry is set to `active', and the first sampling period has completed. It may be created and deleted at other times by the SNMPv2 entity acting in a dual role when the sampled value can not be obtained, as specified in the snmpAlarmVariable object." ::= { snmpAlarmEntry 5 } Case, McCloghrie, Rose & Waldbusser [Page 13]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmStartupAlarm OBJECT-TYPE SYNTAX INTEGER { risingAlarm(1), fallingAlarm(2), risingOrFallingAlarm(3) } MAX-ACCESS read-create STATUS current DESCRIPTION "The alarm that may be sent when this entry is first set to `active'. If the first sample after this entry becomes active is greater than or equal to the risingThreshold and snmpAlarmStartupAlarm is equal to `risingAlarm' or `risingOrFallingAlarm', then a single rising alarm will be generated. If the first sample after this entry becomes active is less than or equal to the fallingThreshold and snmpAlarmStartupAlarm is equal to `fallingAlarm' or `risingOrFallingAlarm', then a single falling alarm will be generated. Note that a snmpObjectUnavailableAlarm is sent upon startup whenever it is applicable, independent of the setting of snmpAlarmStartupAlarm. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." DEFVAL { risingOrFallingAlarm } ::= { snmpAlarmEntry 6 } Case, McCloghrie, Rose & Waldbusser [Page 14]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmRisingThreshold OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-create STATUS current DESCRIPTION "A threshold for the sampled statistic. When the current sampled value is greater than or equal to this threshold, and the value at the last sampling interval was less than this threshold, a single event will be generated. A single event will also be generated if the first sample after this entry becomes active is greater than or equal to this threshold and the associated snmpAlarmStartupAlarm is equal to `risingAlarm' or `risingOrFallingAlarm'. After a rising event is generated, another such event will not be generated until the sampled value falls below this threshold and reaches the snmpAlarmFallingThreshold. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 7 } Case, McCloghrie, Rose & Waldbusser [Page 15]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmFallingThreshold OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-create STATUS current DESCRIPTION "A threshold for the sampled statistic. When the current sampled value is less than or equal to this threshold, and the value at the last sampling interval was greater than this threshold, a single event will be generated. A single event will also be generated if the first sample after this entry becomes active is less than or equal to this threshold and the associated snmpAlarmStartupAlarm is equal to `fallingAlarm' or `risingOrFallingAlarm'. After a falling event is generated, another such event will not be generated until the sampled value rises above this threshold and reaches the snmpAlarmRisingThreshold. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 8 } Case, McCloghrie, Rose & Waldbusser [Page 16]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmRisingEventIndex OBJECT-TYPE SYNTAX INTEGER (0..65535) MAX-ACCESS read-create STATUS current DESCRIPTION "The index of the snmpEventEntry that is used when a rising threshold is crossed. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 9 } Case, McCloghrie, Rose & Waldbusser [Page 17]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmFallingEventIndex OBJECT-TYPE SYNTAX INTEGER (0..65535) MAX-ACCESS read-create STATUS current DESCRIPTION "The index of the snmpEventEntry that is used when a falling threshold is crossed. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 10 } snmpAlarmUnavailableEventIndex OBJECT-TYPE SYNTAX INTEGER (0..65535) MAX-ACCESS read-create STATUS current DESCRIPTION "The index of the snmpEventEntry that is used when a variable becomes unavailable. The snmpEventEntry identified by a particular value of this index is the same as identified by the same value of the snmpEventIndex object. If there is no corresponding entry in the snmpEventTable, then no association exists. In particular, if this value is zero, no associated event will be generated, as zero is not a valid snmpEventIndex. An attempt to modify this object will fail with an `inconsistentValue' error if the associated snmpAlarmStatus object would be equal to `active' both before and after the modification attempt." ::= { snmpAlarmEntry 11 } Case, McCloghrie, Rose & Waldbusser [Page 18]
RFC 1451 Manager-to-Manager MIB April 1993 snmpAlarmStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this snmpAlarm entry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpAlarmVariable, snmpAlarmInterval, snmpAlarmSampleType, snmpAlarmStartupAlarm, snmpAlarmRisingThreshold, snmpAlarmFallingThreshold, snmpAlarmRisingEventIndex, snmpAlarmFallingEventIndex, and snmpAlarmUnavailableEventIndex." ::= { snmpAlarmEntry 12 } Case, McCloghrie, Rose & Waldbusser [Page 19]
RFC 1451 Manager-to-Manager MIB April 1993 -- alarm-related notifications snmpAlarmNotifications OBJECT IDENTIFIER ::= { snmpAlarm 3 } snmpRisingAlarm NOTIFICATION-TYPE OBJECTS { snmpAlarmVariable, snmpAlarmSampleType, snmpAlarmValue, snmpAlarmRisingThreshold } STATUS current DESCRIPTION "An event that is generated when an alarm entry crosses its rising threshold. The instances of those objects contained within the varbind list are those of the alarm entry which generated this event." ::= { snmpAlarmNotifications 1 } snmpFallingAlarm NOTIFICATION-TYPE OBJECTS { snmpAlarmVariable, snmpAlarmSampleType, snmpAlarmValue, snmpAlarmFallingThreshold } STATUS current DESCRIPTION "An event that is generated when an alarm entry crosses its falling threshold. The instances of those objects contained within the varbind list are those of the alarm entry which generated this event." ::= { snmpAlarmNotifications 2 } snmpObjectUnavailableAlarm NOTIFICATION-TYPE OBJECTS { snmpAlarmVariable } STATUS current DESCRIPTION "An event that is generated when a variable monitored by an alarm entry becomes unavailable. The instance of snmpAlarmVariable contained within the varbind list is the one associated with the alarm entry which generated this event." ::= { snmpAlarmNotifications 3 } Case, McCloghrie, Rose & Waldbusser [Page 20]
RFC 1451 Manager-to-Manager MIB April 1993 -- the event group -- -- a collection of objects allowing the description and -- configuration of events from a SNMPv2 entity acting -- in a dual role. snmpEvent OBJECT IDENTIFIER ::= { snmpM2MObjects 2 } -- The snmpEvent table defines the set of events generated on -- a SNMPv2 entity acting in a dual role. Each entry in the -- snmpEventTable associates an event type with the -- notification method and associated parameters. Some -- snmpEvent entries are fired by an associated condition in -- the snmpAlarmTable. Others are fired on behalf of -- conditions defined in the NOTIFICATION-TYPE macro. The -- snmpNotificationTable defines notifications that should -- occur when an associated event is fired. snmpEventNextIndex OBJECT-TYPE SYNTAX INTEGER (0..65535) MAX-ACCESS read-only STATUS current DESCRIPTION "The index number of the next appropriate unassigned entry in the snmpEventTable. The value 0 indicates that no unassigned entries are available. A management station should create new entries in the snmpEventTable using this algorithm: first, issue a management protocol retrieval operation to determine the value of snmpEventNextIndex; and, second, issue a management protocol set operation to create an instance of the snmpEventStatus object setting its value to `createAndWait' or 'createAndGo'." ::= { snmpEvent 1 } Case, McCloghrie, Rose & Waldbusser [Page 21]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventTable OBJECT-TYPE SYNTAX SEQUENCE OF SnmpEventEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of events." ::= { snmpEvent 2 } snmpEventEntry OBJECT-TYPE SYNTAX SnmpEventEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A set of parameters that describe an event that is generated when certain conditions are met." INDEX { snmpEventIndex } ::= { snmpEventTable 1 } SnmpEventEntry ::= SEQUENCE { snmpEventIndex INTEGER, snmpEventID OBJECT IDENTIFIER, snmpEventDescription DisplayString, snmpEventEvents Counter32, snmpEventLastTimeSent TimeStamp, snmpEventStatus RowStatus } snmpEventIndex OBJECT-TYPE SYNTAX INTEGER (1..65535) MAX-ACCESS not-accessible STATUS current DESCRIPTION "An index that uniquely identifies an entry in the snmpEvent table. Each such entry defines an event generated when the appropriate conditions occur." ::= { snmpEventEntry 1 } Case, McCloghrie, Rose & Waldbusser [Page 22]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventID OBJECT-TYPE SYNTAX OBJECT IDENTIFIER MAX-ACCESS read-create STATUS current DESCRIPTION "The authoritative identification of the event type generated by this entry. This variable occurs as the second varbind of an InformRequest- PDU. If this OBJECT IDENTIFIER maps to a NOTIFICATION-TYPE the sender will place the objects listed in the NOTIFICATION-TYPE in the varbind list." ::= { snmpEventEntry 2 } snmpEventDescription OBJECT-TYPE SYNTAX DisplayString (SIZE (0..127)) MAX-ACCESS read-create STATUS current DESCRIPTION "A comment describing this snmpEvent entry." ::= { snmpEventEntry 3 } snmpEventEvents OBJECT-TYPE SYNTAX Counter32 MAX-ACCESS read-only STATUS current DESCRIPTION "The number of events caused by event generators associated with this snmpEvent entry." ::= { snmpEventEntry 4 } Case, McCloghrie, Rose & Waldbusser [Page 23]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventLastTimeSent OBJECT-TYPE SYNTAX TimeStamp MAX-ACCESS read-only STATUS current DESCRIPTION "The value of sysUpTime at the time this snmpEvent entry last generated an event. If this entry has not generated any events, this value will be zero." DEFVAL { 0 } ::= { snmpEventEntry 5 } snmpEventStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The status of this snmpEvent entry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpEventID, snmpEventDescription, snmpEventEvents, and snmpEventLastTimeSent. Setting an instance of this object to the value 'destroy' has the effect of invalidating any/all entries in the snmpEventTable, and the snmpEventNotifyTable which reference the corresponding snmpEventEntry." ::= { snmpEventEntry 6 } Case, McCloghrie, Rose & Waldbusser [Page 24]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventNotifyMinInterval OBJECT-TYPE SYNTAX Integer32 UNITS "seconds" MAX-ACCESS read-only STATUS current DESCRIPTION "The minimum interval that the SNMPv2 entity acting in a dual role will wait before retransmitting an InformRequest-PDU. This object specifies the minimal value supported by the SNMPv2 entity acting in a dual role, based on resource or implementation constraints. For a particular entry in the snmpEventNotifyTable, if the associated snmpEventNotifyIntervalRequested variable is greater than this object, the snmpEventNotifyIntervalRequested value shall be used as the minimum interval for retransmissions of InformRequest-PDUs sent on behalf of that entry." ::= { snmpEvent 3 } snmpEventNotifyMaxRetransmissions OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-only STATUS current DESCRIPTION "The maximum number of time that the SNMPv2 entity acting in a dual role will retransmit an InformRequest-PDU. This object specifies the maximal value supported by the SNMPv2 entity acting in a dual role, based on resource or implementation constraints. For a particular entry in the snmpEventNotifyTable, if the associated snmpEventNotifyRetransmissionsRequested variable is less than this object, the snmpEventNotifyRetransmissionsRequested value shall be used as the retransmission count for InformRequest-PDUs sent on behalf of that entry." ::= { snmpEvent 4 } -- The snmpEventNotifyTable is used to configure the Case, McCloghrie, Rose & Waldbusser [Page 25]
RFC 1451 Manager-to-Manager MIB April 1993 -- destination and type of notifications sent by a SNMPv2 -- entity acting in a manager role when a particular event -- is triggered. snmpEventNotifyTable OBJECT-TYPE SYNTAX SEQUENCE OF SnmpEventNotifyEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of protocol configuration entries for event notifications from this entity." ::= { snmpEvent 5 } snmpEventNotifyEntry OBJECT-TYPE SYNTAX SnmpEventNotifyEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A set of parameters that describe the type and destination of InformRequest-PDUs sent for a particular event. The snmpEventIndex in this entry's INDEX clause identifies the snmpEventEntry which, when triggered, will generate a notification as configured in this entry. The contextIdentity in this entry's INDEX clause identifies the context to which a notification will be sent." INDEX { snmpEventIndex, contextIdentity } ::= { snmpEventNotifyTable 1 } SnmpEventNotifyEntry ::= SEQUENCE { snmpEventNotifyIntervalRequested Integer32, snmpEventNotifyRetransmissionsRequested Integer32, snmpEventNotifyLifetime Integer32, snmpEventNotifyStatus RowStatus } Case, McCloghrie, Rose & Waldbusser [Page 26]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventNotifyIntervalRequested OBJECT-TYPE SYNTAX Integer32 UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "The requested interval for retransmission of Inform PDUs generated on the behalf of this entry. This variable will be the actual interval used unless the snmpEventNotifyMinInterval is greater than this object, in which case the interval shall be equal to snmpEventNotifyMinInterval." DEFVAL { 30 } ::= { snmpEventNotifyEntry 1 } snmpEventNotifyRetransmissionsRequested OBJECT-TYPE SYNTAX Integer32 MAX-ACCESS read-create STATUS current DESCRIPTION "The requested number of retransmissions of an InformRequest-PDU generated on behalf of this entry. This variable will be the actual number of retransmissions used unless the snmpEventNotifyMaxRetransmissions is less than this object, in which case the retransmission count shall be equal to snmpEventNotifyMaxRetransmissions." DEFVAL { 5 } ::= { snmpEventNotifyEntry 2 } Case, McCloghrie, Rose & Waldbusser [Page 27]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventNotifyLifetime OBJECT-TYPE SYNTAX Integer32 UNITS "seconds" MAX-ACCESS read-create STATUS current DESCRIPTION "The number of seconds this entry shall live until the corresponding instance of snmpEventNotifyStatus is set to 'destroy'. This value shall count down to zero, at which time the corresponding instance of snmpEventNotifyStatus will be set to 'destroy'. Any management station that is using this entry must periodically refresh this value to ensure the continued delivery of events." DEFVAL { 86400 } ::= { snmpEventNotifyEntry 3 } snmpEventNotifyStatus OBJECT-TYPE SYNTAX RowStatus MAX-ACCESS read-create STATUS current DESCRIPTION "The state of this snmpEventNotifyEntry. This object may not be set to `active' unless the following columnar objects exist in this row: snmpEventNotifyIntervalRequested, snmpEventNotifyRetransmissionsRequested, and snmpEventNotifyLifetime." ::= { snmpEventNotifyEntry 4 } Case, McCloghrie, Rose & Waldbusser [Page 28]
RFC 1451 Manager-to-Manager MIB April 1993 -- conformance information snmpM2MConformance OBJECT IDENTIFIER ::= { snmpM2M 2 } snmpM2MCompliances OBJECT IDENTIFIER ::= { snmpM2MConformance 1 } snmpM2MGroups OBJECT IDENTIFIER ::= { snmpM2MConformance 2 } -- compliance statements snmpM2MCompliance MODULE-COMPLIANCE STATUS current DESCRIPTION "The compliance statement for SNMPv2 entities which implement the Manager-to-Manager MIB." MODULE -- this module MANDATORY-GROUPS { snmpAlarmGroup, snmpEventGroup } ::= { snmpM2MCompliances 1 } -- units of conformance snmpAlarmGroup OBJECT-GROUP OBJECTS { snmpAlarmNextIndex, snmpAlarmVariable, snmpAlarmInterval, snmpAlarmSampleType, snmpAlarmValue, snmpAlarmStartupAlarm, snmpAlarmRisingThreshold, snmpAlarmFallingThreshold, snmpAlarmRisingEventIndex, snmpAlarmFallingEventIndex, snmpAlarmUnavailableEventIndex, snmpAlarmStatus } STATUS current DESCRIPTION "A collection of objects allowing the description and configuration of threshold alarms from a SNMPv2 entity acting in a dual role." ::= { snmpM2MGroups 1 } Case, McCloghrie, Rose & Waldbusser [Page 29]
RFC 1451 Manager-to-Manager MIB April 1993 snmpEventGroup OBJECT-GROUP OBJECTS { snmpEventNextIndex, snmpEventID, snmpEventDescription, snmpEventEvents, snmpEventLastTimeSent, snmpEventStatus, snmpEventNotifyMinInterval, snmpEventNotifyMaxRetransmissions, snmpEventNotifyIntervalRequested, snmpEventNotifyRetransmissionsRequested, snmpEventNotifyLifetime, snmpEventNotifyStatus } STATUS current DESCRIPTION "A collection of objects allowing the description and configuration of events from a SNMPv2 entity acting in a dual role." ::= { snmpM2MGroups 2 } END Case, McCloghrie, Rose & Waldbusser [Page 30]
RFC 1451 Manager-to-Manager MIB April 1993 4. Acknowledgements The comments of the SNMP version 2 working group are gratefully acknowledged: Beth Adams, Network Management Forum Steve Alexander, INTERACTIVE Systems Corporation David Arneson, Cabletron Systems Toshiya Asaba Fred Baker, ACC Jim Barnes, Xylogics, Inc. Brian Bataille Andy Bierman, SynOptics Communications, Inc. Uri Blumenthal, IBM Corporation Fred Bohle, Interlink Jack Brown Theodore Brunner, Bellcore Stephen F. Bush, GE Information Services Jeffrey D. Case, University of Tennessee, Knoxville John Chang, IBM Corporation Szusin Chen, Sun Microsystems Robert Ching Chris Chiotasso, Ungermann-Bass Bobby A. Clay, NASA/Boeing John Cooke, Chipcom Tracy Cox, Bellcore Juan Cruz, Datability, Inc. David Cullerot, Cabletron Systems Cathy Cunningham, Microcom James R. (Chuck) Davin, Bellcore Michael Davis, Clearpoint Mike Davison, FiberCom Cynthia DellaTorre, MITRE Taso N. Devetzis, Bellcore Manual Diaz, DAVID Systems, Inc. Jon Dreyer, Sun Microsystems David Engel, Optical Data Systems Mike Erlinger, Lexcel Roger Fajman, NIH Daniel Fauvarque, Sun Microsystems Karen Frisa, CMU Shari Galitzer, MITRE Shawn Gallagher, Digital Equipment Corporation Richard Graveman, Bellcore Maria Greene, Xyplex, Inc. Case, McCloghrie, Rose & Waldbusser [Page 31]
RFC 1451 Manager-to-Manager MIB April 1993 Michel Guittet, Apple Robert Gutierrez, NASA Bill Hagerty, Cabletron Systems Gary W. Haney, Martin Marietta Energy Systems Patrick Hanil, Nokia Telecommunications Matt Hecht, SNMP Research, Inc. Edward A. Heiner, Jr., Synernetics Inc. Susan E. Hicks, Martin Marietta Energy Systems Geral Holzhauer, Apple John Hopprich, DAVID Systems, Inc. Jeff Hughes, Hewlett-Packard Robin Iddon, Axon Networks, Inc. David Itusak Kevin M. Jackson, Concord Communications, Inc. Ole J. Jacobsen, Interop Company Ronald Jacoby, Silicon Graphics, Inc. Satish Joshi, SynOptics Communications, Inc. Frank Kastenholz, FTP Software Mark Kepke, Hewlett-Packard Ken Key, SNMP Research, Inc. Zbiginew Kielczewski, Eicon Jongyeoi Kim Andrew Knutsen, The Santa Cruz Operation Michael L. Kornegay, VisiSoft Deirdre C. Kostik, Bellcore Cheryl Krupczak, Georgia Tech Mark S. Lewis, Telebit David Lin David Lindemulder, AT&T/NCR Ben Lisowski, Sprint David Liu, Bell-Northern Research John Lunny, The Wollongong Group Robert C. Lushbaugh Martin, Marietta Energy Systems Michael Luufer, BBN Carl Madison, Star-Tek, Inc. Keith McCloghrie, Hughes LAN Systems Evan McGinnis, 3Com Corporation Bill McKenzie, IBM Corporation Donna McMaster, SynOptics Communications, Inc. John Medicke, IBM Corporation Doug Miller, Telebit Dave Minnich, FiberCom Mohammad Mirhakkak, MITRE Rohit Mital, Protools George Mouradian, AT&T Bell Labs Case, McCloghrie, Rose & Waldbusser [Page 32]
RFC 1451 Manager-to-Manager MIB April 1993 Patrick Mullaney, Cabletron Systems Dan Myers, 3Com Corporation Rina Nathaniel, Rad Network Devices Ltd. Hien V. Nguyen, Sprint Mo Nikain Tom Nisbet William B. Norton, MERIT Steve Onishi, Wellfleet Communications, Inc. David T. Perkins, SynOptics Communications, Inc. Carl Powell, BBN Ilan Raab, SynOptics Communications, Inc. Richard Ramons, AT&T Venkat D. Rangan, Metric Network Systems, Inc. Louise Reingold, Sprint Sam Roberts, Farallon Computing, Inc. Kary Robertson, Concord Communications, Inc. Dan Romascanu, Lannet Data Communications Ltd. Marshall T. Rose, Dover Beach Consulting, Inc. Shawn A. Routhier, Epilogue Technology Corporation Chris Rozman Asaf Rubissa, Fibronics Jon Saperia, Digital Equipment Corporation Michael Sapich Mike Scanlon, Interlan Sam Schaen, MITRE John Seligson, Ultra Network Technologies Paul A. Serice, Corporation for Open Systems Chris Shaw, Banyan Systems Timon Sloane Robert Snyder, Cisco Systems Joo Young Song Roy Spitier, Sprint Einar Stefferud, Network Management Associates John Stephens, Cayman Systems, Inc. Robert L. Stewart, Xyplex, Inc. (chair) Kaj Tesink, Bellcore Dean Throop, Data General Ahmet Tuncay, France Telecom-CNET Maurice Turcotte, Racal Datacom Warren Vik, INTERACTIVE Systems Corporation Yannis Viniotis Steven L. Waldbusser, Carnegie Mellon Universitty Timothy M. Walden, ACC Alice Wang, Sun Microsystems James Watt, Newbridge Case, McCloghrie, Rose & Waldbusser [Page 33]
RFC 1451 Manager-to-Manager MIB April 1993 Luanne Waul, Timeplex Donald E. Westlake III, Digital Equipment Corporation Gerry White Bert Wijnen, IBM Corporation Peter Wilson, 3Com Corporation Steven Wong, Digital Equipment Corporation Randy Worzella, IBM Corporation Daniel Woycke, MITRE Honda Wu Jeff Yarnell, Protools Chris Young, Cabletron Kiho Yum, 3Com Corporation Case, McCloghrie, Rose & Waldbusser [Page 34]
RFC 1451 Manager-to-Manager MIB April 1993 5. References [1] Information processing systems - Open Systems Interconnection - Specification of Abstract Syntax Notation One (ASN.1), International Organization for Standardization. International Standard 8824, (December, 1987). [2] Case, J., McCloghrie, K., Rose, M., and Waldbusser, S., "Structure of Management Information for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1442, SNMP Research, Inc., Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, April 1993. [3] Case, J., McCloghrie, K., Rose, M., and Waldbusser, S., "Protocol Operations for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1448, SNMP Research, Inc., Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, April 1993. [4] Galvin, J., and McCloghrie, K., "Administrative Model for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1445, Trusted Information Systems, Hughes LAN Systems, April 1993. [5] McCloghrie, K., and Galvin, J., "Party MIB for version 2 of the Simple Network Management Protocol (SNMPv2)", RFC 1447, Hughes LAN Systems, Trusted Information Systems, April 1993. Case, McCloghrie, Rose & Waldbusser [Page 35]
RFC 1451 Manager-to-Manager MIB April 1993 6. Security Considerations Security issues are not discussed in this memo. 7. Authors' Addresses Jeffrey D. Case SNMP Research, Inc. 3001 Kimberlin Heights Rd. Knoxville, TN 37920-9716 US Phone: +1 615 573 1434 Email: case@snmp.com Keith McCloghrie Hughes LAN Systems 1225 Charleston Road Mountain View, CA 94043 US Phone: +1 415 966 7934 Email: kzm@hls.com Marshall T. Rose Dover Beach Consulting, Inc. 420 Whisman Court Mountain View, CA 94043-2186 US Phone: +1 415 968 1052 Email: mrose@dbc.mtview.ca.us Steven Waldbusser Carnegie Mellon University 4910 Forbes Ave Pittsburgh, PA 15213 US Phone: +1 412 268 6628 Email: waldbusser@cmu.edu Case, McCloghrie, Rose & Waldbusser [Page 36]