Internet Draft Manager-to-Manager MIB November 1994 Manager-to-Manager Management Information Base 1 November 1994 Jeffrey D. Case SNMP Research, Inc. case@snmp.com Keith McCloghrie Cisco Systems, Inc. kzm@cisco.com Marshall T. Rose Dover Beach Consulting, Inc. mrose@dbc.mtview.ca.us Steven Waldbusser Carnegie Mellon University waldbusser@cmu.edu Status of this Memo This document is an Internet-Draft. 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.'' To learn the current status of any Internet-Draft, please check the ``1id-abstracts.txt'' listing contained in the Internet- Drafts Shadow Directories on ds.internic.net (US East Coast), nic.nordu.net (Europe), ftp.isi.edu (US West Coast), or munnari.oz.au (Pacific Rim). Expires May 1994 [Page 1] Internet Draft Manager-to-Manager MIB November 1994 1. Introduction A 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 authentication, authorization, access control, and privacy policies. Management stations execute management applications which monitor and control managed elements. Managed elements are devices such as hosts, routers, terminal servers, etc., which are monitored and controlled via 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). 1.2. Change Log For the 1 November version: - recast RFC 1451 into an Internet-Draft, Expires May 1994 [Page 2] Internet Draft Manager-to-Manager MIB November 1994 - fixed typos, - added a description of how source and destination parties are chosen for sending notifications, - reworded descriptions of notifications so that a context is not depicted as the "destination" of a notification, - added note that management stations are not obligated to use a retrieved value of snmpAlarmNextIndex to create an entry in the snmpAlarmTable. Expires May 1994 [Page 3] Internet Draft Manager-to-Manager MIB November 1994 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. 2.3. Destinations of Inform-Request PDUs An entry in the Notification Table identifies a context for which an Inform-Request PDU will be sent for a particular event. The destination(s) to which the Inform-Request PDU is sent is determined by inspection of the aclTable [5], to find all entries which satisfy the following criteria: Expires May 1994 [Page 4] Internet Draft Manager-to-Manager MIB November 1994 (1) the value of aclSubject refers to a local party, (2) the value of aclPrivileges allows for the Inform-Request PDU, (3) the value of aclResources is the context specified by the entry in the Notification Table, Then, for each entry satisfying these conditions, an Inform-Request PDU is sent from aclSubject with context aclResources to aclTarget. The variable bindings of the Inform-Request PDU are as specified in section 4.2.7 of [3]. 2.4. 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 to any context that includes the snmpAlarmTable, must, by default, include the view 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. Expires May 1994 [Page 5] Internet Draft Manager-to-Manager MIB November 1994 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 } viewIndex = { ViewIndex } viewSubtree = { snmpAlarmEntry 0 sampleContext } viewStatus = { included } viewMask = { 'FFEF'H } -- specifies wildcard for column Expires May 1994 [Page 6] Internet Draft Manager-to-Manager MIB November 1994 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 "9411010000Z" ORGANIZATION "IETF SNMPv2 Working Group" CONTACT-INFO " Steven Waldbusser Postal: Carnegie Mellon University 5000 Forbes Ave Pittsburgh, PA 15213 USA 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 } Expires May 1994 [Page 7] Internet Draft Manager-to-Manager MIB November 1994 -- 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. -- Expires May 1994 [Page 8] Internet Draft Manager-to-Manager MIB November 1994 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). A management station which retrieves the value of snmpAlarmNextIndex is under no obligation to use that value to create a new entry in the snmpAlarmTable." ::= { snmpAlarm 1 } snmpAlarmTable OBJECT-TYPE SYNTAX SEQUENCE OF SnmpAlarmEntry MAX-ACCESS not-accessible STATUS current DESCRIPTION "A list of snmpAlarm entries." ::= { snmpAlarm 2 } Expires May 1994 [Page 9] Internet Draft Manager-to-Manager MIB November 1994 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 } 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 } Expires May 1994 [Page 10] Internet Draft Manager-to-Manager MIB November 1994 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." ::= { snmpAlarmEntry 2 } Expires May 1994 [Page 11] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 12] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 13] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 14] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 15] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 16] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 17] Internet Draft Manager-to-Manager MIB November 1994 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 } 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 } Expires May 1994 [Page 18] Internet Draft Manager-to-Manager MIB November 1994 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 } 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 } Expires May 1994 [Page 19] Internet Draft Manager-to-Manager MIB November 1994 -- 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 } Expires May 1994 [Page 20] Internet Draft Manager-to-Manager MIB November 1994 -- 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 } Expires May 1994 [Page 21] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 22] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 23] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 24] Internet Draft Manager-to-Manager MIB November 1994 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 times 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 -- context and retransmission parameters of notifications -- sent by a SNMPv2 entity acting in a manager role when a -- particular event is triggered. Expires May 1994 [Page 25] Internet Draft Manager-to-Manager MIB November 1994 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 retransmission parameters and the context to be used for 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 for which a notification will be sent." INDEX { snmpEventIndex, contextIdentity } ::= { snmpEventNotifyTable 1 } SnmpEventNotifyEntry ::= SEQUENCE { snmpEventNotifyIntervalRequested Integer32, snmpEventNotifyRetransmissionsRequested Integer32, snmpEventNotifyLifetime Integer32, snmpEventNotifyStatus RowStatus } Expires May 1994 [Page 26] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 27] Internet Draft Manager-to-Manager MIB November 1994 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 } Expires May 1994 [Page 28] Internet Draft Manager-to-Manager MIB November 1994 -- 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 } Expires May 1994 [Page 29] Internet Draft Manager-to-Manager MIB November 1994 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 Expires May 1994 [Page 30] Internet Draft Manager-to-Manager MIB November 1994 4. Acknowledgements This document is a modified version of RFC 1451. 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)", Internet Draft, SNMP Research, Inc., Cisco Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, November 1994. [3] Case, J., McCloghrie, K., Rose, M., and Waldbusser, S., "Protocol Operations for Version 2 of the Simple Network Management Protocol (SNMPv2)", Internet Draft, SNMP Research, Inc., Cisco Systems, Dover Beach Consulting, Inc., Carnegie Mellon University, November 1994. [4] Galvin, J., and McCloghrie, K., "Administrative Model for Version 2 of the Simple Network Management Protocol (SNMPv2)", Internet Draft, Trusted Information Systems, Cisco Systems, November 1994. [5] McCloghrie, K., and Galvin, J., "Party MIB for Version 2 of the Simple Network Management Protocol (SNMPv2)", Internet Draft, Cisco Systems, Trusted Information Systems, November 1994. Expires May 1994 [Page 31] Internet Draft Manager-to-Manager MIB November 1994 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 Cisco Systems, Inc. 170 West Tasman Drive, San Jose CA 95134-1706. Phone: +1 408 526 5260 Email: kzm@cisco.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 5000 Forbes Ave Pittsburgh, PA 15213 US Phone: +1 412 268 6628 Email: waldbusser@cmu.edu Expires May 1994 [Page 32] Internet Draft Manager-to-Manager MIB November 1994 Table of Contents 1 Introduction .................................................... 2 1.1 A Note on Terminology ......................................... 2 1.2 Change Log .................................................... 2 2 Overview ........................................................ 4 2.1 A SNMPv2 Entity Acting in a Dual Role ......................... 4 2.2 Alarms, Events, and Notifications ............................. 4 2.3 Destinations of Inform-Request PDUs ........................... 4 2.4 Access Control ................................................ 5 3 Definitions ..................................................... 7 3.1 The Alarm Group ............................................... 8 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 ...................................................... 31 6 Security Considerations ......................................... 32 7 Authors' Addresses .............................................. 32 Expires May 1994 [Page 33]