|
Network Working Group Request for Comments: 3014 Category: Standards Track |
Editor of this version: R. Kavasseri Cisco Systems, Inc. Author of previous version: B. Stewart November 2000 |
This document specifies an Internet standards track protocol for the Internet community, and requests discussion and suggestions for improvements. Please refer to the current edition of the "Internet Official Protocol Standards" (STD 1) for the standardization state and status of this protocol. Distribution of this memo is unlimited.
Copyright © The Internet Society (2000). All Rights Reserved.
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 managed objects used for logging Simple Network Management Protocol (SNMP) Notifications.
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.
1 The SNMP Management Framework
2 Overview
2.1 Environment
2.1.1 SNMP Engines and Contexts
2.1.2 Security
2.2 Structure
2.2.1 Configuration
2.2.2 Statistics
2.2.3 Log
2.3 Example
3 Definitions
4 Intellectual Property
5 References
6 Security Considerations
7 Author's Address
8 Full Copyright Statement
The SNMP Management Framework presently consists of five major components:
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 compliant 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.
Systems that support SNMP often need a mechanism for recording
Notification information as a hedge against lost Notifications,
whether those are Traps or Informs [RFC1905] that exceed
retransmission limits. This MIB therefore provides common
infrastructure for other MIBs in the form of a local logging
function. It is intended primarily for senders of Notifications but
could be used also by receivers.
Given the Notification Log MIB, individual MIBs bear less responsibility to record the transient information associated with an event against the possibility that the Notification message is lost, and applications can poll the log to verify that they have not missed important Notifications.
The overall environmental concerns for the MIB are:
There are two distinct information flows from multiple notification originators that one may log. The first is the notifications that are received (from one or more SNMP engines) for logging as SNMP informs and traps. The other comprises notifications delivered to an SNMP engine at the interface to the notification originator (using a notification mechanism other than SNMP informs or traps). The latter information flow (using a notification mechanism other than SNMP informs or traps) is modeled here as the SNMP engine (which maintains the log) sending a notification to itself. The remainder of this section discusses the handling of the former information flow - notifications (received in the form of SNMP informs or traps) from multiple SNMP engines.
As described in the SNMP architecture [RFC2571], a given system may support multiple SNMP engines operating independently of one another, each with its own SNMP engine identification. Furthermore, within the purview of a given engine there may be multiple named management contexts supporting overlapping or disjoint sets of MIB objects and Notifications. Thus, understanding a particular Notification requires knowing the SNMP engine and management context from whence it came.
To provide the necessary source information for a logged
Notification, the MIB includes objects to record that Notification's
source SNMP engine ID and management context name.
Security for Notifications is awkward since access control for the objects in the Notification can be checked only where the Notification is created. Thus such checking is possible only for locally-generated Notifications, and even then only when security credentials are available.
For the purpose of this discussion, "security credentials" means the
input values for the abstract service interface function
isAccessAllowed [RFC2571] and using those credentials means
conceptually using that function to see that those credentials allow
access to the MIB objects in question, operating as for a
Notification Originator in [RFC2573].
The Notification Log MIB has the notion of a "named log." By using log names and view-based access control [RFC2575] a network administrator can provide different access for different users. When an application creates a named log the security credentials of the creator stay associated with that log.
A managed system with fewer resources MAY disallow the creation of named logs, providing only the default, null-named log. Such a log has no implicit security credentials for Notification object access control and Notifications are put into it with no further checking.
When putting locally-generated Notifications into a named log, the managed system MUST use the security credentials associated with that log and MUST apply the same access control rules as described for a Notification Originator in [RFC2573].
The managed system SHOULD NOT apply access control when adding remotely-generated Notifications into either a named log or the default, null-named log. In those cases the security of the information in the log SHOULD be left to the normal, overall access control for the log itself.
The Notification Log MIB allows applications to set the maximum
number of Notifications that can be logged, using
nlmConfigGlobalEntryLimit. Similarly, an application can set the
maximum age using nlmConfigGlobalAgeOut, after which older
Notifications MAY be timed out. Please be aware that contention
between multiple applications trying to set these objects to
different values MAY affect the reliability and completeness of data
seen by each application, i.e., it is possible that one application
may change the value of either of these objects, resulting in some
Notifications being deleted before the other applications have had a
chance to see them. This could be used to orchestrate a denial-of-
service attack. Methods for countering such an attack are for
further study.
The MIB has the following sections:
The configuration section contains objects to manage resource use by the MIB.
This section also contains a table to specify what logs exist and how they operate. Deciding which Notifications are to be logged depends
on filters defined in the the snmpNotifyFilterTable in the standard SNMP Notification MIB [RFC2573] identified by the initial index (snmpNotifyFilterName) from that table.
The statistics section contains counters for Notifications logged and discarded, supplying a means to understand the results of log capacity configuration and resource problems.
The log contains the Notifications and the objects that came in their variable binding list, indexed by an integer that reflects when the entry was made. An application that wants to collect all logged Notifications or to know if it may have missed any can keep track of the highest index it has retrieved and start from there on its next poll, checking sysUpTime for a discontinuity that would have reset the index and perhaps have lost entries.
Variables are in a table indexed by Notification index and variable index within that Notification. The values are kept as a "discriminated union," with one value object per variable. Exactly which value object is instantiated depends on the SNMP data type of the variable, with a separate object of appropriate type for each distinct SNMP data type.
An application can thus reconstruct the information from the Notification PDU from what is recorded in the log.
Following is an example configuration of a named log for logging only linkUp and linkDown Notifications.
In nlmConfigLogTable:
nlmConfigLogFilterName.5."links" = "link-status"
nlmConfigLogEntryLimit.5."links" = 0
nlmConfigLogAdminStatus.5."links" = enabled
nlmConfigLogOperStatus.5."links" = operational
nlmConfigLogStorageType.5."links" = nonVolatile
nlmConfigLogEntryStatus.5."links" = active
Note that snmpTraps is:
iso.org.dod.internet.snmpV2.snmpModules.snmpMIB.snmpMIBObjects.5
Or numerically:
1.3.6.1.6.3.1.1.5
And linkDown is snmpTraps.3 and linkUp is snmpTraps.4.
So to allow the two Notifications in snmpNotifyFilterTable:
snmpNotifyFilterMask.11."link-status".1.3.6.1.6.3.1.1.5.3 = ''H
snmpNotifyFilterType.11."link-status".1.3.6.1.6.3.1.1.5.3 = include
snmpNotifyFilterStorageType.11."link-status".1.3.6.1.6.3.1.1.5.3
= nonVolatile
snmpNotifyFilterRowStatus.11."link-status".1.3.6.1.6.3.1.1.5.3
= active
snmpNotifyFilterMask.11."link-status".1.3.6.1.6.3.1.1.5.4 = ''H
snmpNotifyFilterType.11."link-status".1.3.6.1.6.3.1.1.5.4 = include
snmpNotifyFilterStorageType.11."link-status".1.3.6.1.6.3.1.1.5.4
= nonVolatile
snmpNotifyFilterRowStatus.11."link-status".1.3.6.1.6.3.1.1.5.4
= active
NOTIFICATION-LOG-MIB DEFINITIONS ::= BEGIN
IpAddress, Opaque, mib-2 FROM SNMPv2-SMI
TimeStamp, DateAndTime,
StorageType, RowStatus,
TAddress, TDomain FROM SNMPv2-TC
SnmpAdminString, SnmpEngineID FROM SNMP-FRAMEWORK-MIB
MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF;
LAST-UPDATED "200011270000Z" -- 27 November 2000
ORGANIZATION "IETF Distributed Management Working Group"
CONTACT-INFO "Ramanathan Kavasseri
Cisco Systems, Inc.
170 West Tasman Drive,
San Jose CA 95134-1706.
Phone: +1 408 527 2446
Email: ramk@cisco.com"
DESCRIPTION
"The MIB module for logging SNMP Notifications, that is, Traps
and Informs."
-- Revision History
REVISION "200011270000Z" -- 27 November 2000
DESCRIPTION "This is the initial version of this MIB.
Published as RFC 3014"
::= { mib-2 92 }
notificationLogMIBObjects OBJECT IDENTIFIER ::= { notificationLogMIB 1 }
nlmConfig OBJECT IDENTIFIER ::= { notificationLogMIBObjects 1 }
nlmStats OBJECT IDENTIFIER ::= { notificationLogMIBObjects 2 }
nlmLog OBJECT IDENTIFIER ::= { notificationLogMIBObjects 3 }
--
-- Configuration Section
--
SYNTAX Unsigned32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The maximum number of notification entries that may be held
in nlmLogTable for all nlmLogNames added together. A particular
setting does not guarantee that much data can be held.
If an application changes the limit while there are
Notifications in the log, the oldest Notifications MUST be
discarded to bring the log down to the new limit - thus the
value of nlmConfigGlobalEntryLimit MUST take precedence over
the values of nlmConfigGlobalAgeOut and nlmConfigLogEntryLimit,
even if the Notification being discarded has been present for
fewer minutes than the value of nlmConfigGlobalAgeOut, or if
the named log has fewer entries than that specified in
nlmConfigLogEntryLimit.
A value of 0 means no limit.
Please be aware that contention between multiple managers trying to set this object to different values MAY affect the reliability and completeness of data seen by each manager." DEFVAL { 0 }
::= { nlmConfig 1 }
SYNTAX Unsigned32
UNITS "minutes"
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The number of minutes a Notification SHOULD be kept in a log
before it is automatically removed.
If an application changes the value of nlmConfigGlobalAgeOut, Notifications older than the new time MAY be discarded to meet the new time.
A value of 0 means no age out.
Please be aware that contention between multiple managers trying to set this object to different values MAY affect the reliability and completeness of data seen by each manager." DEFVAL { 1440 } -- 24 hours
::= { nlmConfig 2 }
--
-- Basic Log Configuration Table
--
SYNTAX SEQUENCE OF NlmConfigLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of logging control entries."
::= { nlmConfig 3 }
SYNTAX NlmConfigLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A logging control entry. Depending on the entry's storage type
entries may be supplied by the system or created and deleted by
applications using nlmConfigLogEntryStatus."
INDEX { nlmLogName }
::= { nlmConfigLogTable 1 }
NlmConfigLogEntry ::= SEQUENCE {
nlmLogName SnmpAdminString,
nlmConfigLogFilterName SnmpAdminString,
nlmConfigLogEntryLimit Unsigned32,
nlmConfigLogAdminStatus INTEGER,
nlmConfigLogOperStatus INTEGER,
nlmConfigLogStorageType StorageType,
nlmConfigLogEntryStatus RowStatus
}
SYNTAX SnmpAdminString (SIZE(0..32))
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The name of the log.
An implementation may allow multiple named logs, up to some
implementation-specific limit (which may be none). A
zero-length log 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 logs."
::= { nlmConfigLogEntry 1 }
SYNTAX SnmpAdminString (SIZE(0..32))
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"A value of snmpNotifyFilterProfileName as used as an index
into the snmpNotifyFilterTable in the SNMP Notification MIB,
specifying the locally or remotely originated Notifications
to be filtered out and not logged in this log.
A zero-length value or a name that does not identify an
existing entry in snmpNotifyFilterTable indicate no
Notifications are to be logged in this log."
DEFVAL { ''H }
::= { nlmConfigLogEntry 2 }
SYNTAX Unsigned32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The maximum number of notification entries that can be held in
nlmLogTable for this named log. A particular setting does not
guarantee that that much data can be held.
If an application changes the limit while there are
Notifications in the log, the oldest Notifications are discarded
to bring the log down to the new limit.
A value of 0 indicates no limit.
Please be aware that contention between multiple managers trying to set this object to different values MAY affect the reliability and completeness of data seen by each manager." DEFVAL { 0 }
::= { nlmConfigLogEntry 3 }
SYNTAX INTEGER { enabled(1), disabled(2) }
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Control to enable or disable the log without otherwise
disturbing the log's entry.
Please be aware that contention between multiple managers trying to set this object to different values MAY affect the reliability and completeness of data seen by each manager." DEFVAL { enabled }
::= { nlmConfigLogEntry 4 }
SYNTAX INTEGER { disabled(1), operational(2), noFilter(3) }
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The operational status of this log:
disabled administratively disabled
operational administratively enabled and working
noFilter administratively enabled but either
nlmConfigLogFilterName is zero length
or does not name an existing entry in
snmpNotifyFilterTable"
::= { nlmConfigLogEntry 5 }
SYNTAX StorageType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The storage type of this conceptual row."
::= { nlmConfigLogEntry 6 }
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Control for creating and deleting entries. Entries may be
modified while active.
For non-null-named logs, the managed system records the security credentials from the request that sets nlmConfigLogStatus to 'active' and uses that identity to apply access control to the objects in the Notification to decide if that Notification may be logged."
::= { nlmConfigLogEntry 7 }
--
-- Statistics Section
--
SYNTAX Counter32
UNITS "notifications"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Notifications put into the nlmLogTable. This
counts a Notification once for each log entry, so a Notification
put into multiple logs is counted multiple times."
::= { nlmStats 1 }
SYNTAX Counter32
UNITS "notifications"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of log entries discarded to make room for a new entry
due to lack of resources or the value of nlmConfigGlobalEntryLimit
or nlmConfigLogEntryLimit. This does not include entries discarded
due to the value of nlmConfigGlobalAgeOut."
::= { nlmStats 2 }
--
-- Log Statistics Table
--
SYNTAX SEQUENCE OF NlmStatsLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of Notification log statistics entries."
::= { nlmStats 3 }
SYNTAX NlmStatsLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A Notification log statistics entry."
AUGMENTS { nlmConfigLogEntry }
::= { nlmStatsLogTable 1 }
NlmStatsLogEntry ::= SEQUENCE {
nlmStatsLogNotificationsLogged Counter32,
nlmStatsLogNotificationsBumped Counter32
}
SYNTAX Counter32
UNITS "notifications"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of Notifications put in this named log."
::= { nlmStatsLogEntry 1 }
SYNTAX Counter32
UNITS "notifications"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of log entries discarded from this named log to make
room for a new entry due to lack of resources or the value of
nlmConfigGlobalEntryLimit or nlmConfigLogEntryLimit. This does not
include entries discarded due to the value of
nlmConfigGlobalAgeOut."
::= { nlmStatsLogEntry 2 }
--
-- Log Section
-- --
-- Log Table
--
SYNTAX SEQUENCE OF NlmLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of Notification log entries.
It is an implementation-specific matter whether entries in this table are preserved across initializations of the management system. In general one would expect that they are not.
Note that keeping entries across initializations of the management system leads to some confusion with counters and TimeStamps, since both of those are based on sysUpTime, which resets on management initialization. In this situation, counters apply only after the reset and nlmLogTime for entries made before the reset MUST be set to 0."
::= { nlmLog 1 }
SYNTAX NlmLogEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A Notification log entry.
Entries appear in this table when Notifications occur and pass filtering by nlmConfigLogFilterName and access control. They are removed to make way for new entries due to lack of resources or the values of nlmConfigGlobalEntryLimit, nlmConfigGlobalAgeOut, or nlmConfigLogEntryLimit.
If adding an entry would exceed nlmConfigGlobalEntryLimit or system resources in general, the oldest entry in any log SHOULD be removed to make room for the new one.
If adding an entry would exceed nlmConfigLogEntryLimit the oldest entry in that log SHOULD be removed to make room for the new one.
Before the managed system puts a locally-generated Notification into a non-null-named log it assures that the creator of the log has access to the information in the Notification. If not it does not log that Notification in that log."
INDEX { nlmLogName, nlmLogIndex }
::= { nlmLogTable 1 }
NlmLogEntry ::= SEQUENCE {
nlmLogIndex Unsigned32,
nlmLogTime TimeStamp,
nlmLogDateAndTime DateAndTime,
nlmLogEngineID SnmpEngineID,
nlmLogEngineTAddress TAddress,
nlmLogEngineTDomain TDomain,
nlmLogContextEngineID SnmpEngineID,
nlmLogContextName SnmpAdminString,
nlmLogNotificationID OBJECT IDENTIFIER
}
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A monotonically increasing integer for the sole purpose of
indexing entries within the named log. When it reaches the
maximum value, an extremely unlikely event, the agent wraps the
value back to 1."
::= { nlmLogEntry 1 }
SYNTAX TimeStamp
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value of sysUpTime when the entry was placed in the log. If
the entry occurred before the most recent management system
initialization this object value MUST be set to zero."
::= { nlmLogEntry 2 }
SYNTAX DateAndTime
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The local date and time when the entry was logged, instantiated
only by systems that have date and time capability."
::= { nlmLogEntry 3 }
SYNTAX SnmpEngineID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The identification of the SNMP engine at which the Notification
originated.
If the log can contain Notifications from only one engine or the Trap is in SNMPv1 format, this object is a zero-length string."
::= { nlmLogEntry 4 }
SYNTAX TAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The transport service address of the SNMP engine from which the
Notification was received, formatted according to the corresponding
value of nlmLogEngineTDomain. This is used to identify the source
of an SNMPv1 trap, since an nlmLogEngineId cannot be extracted
from the SNMPv1 trap pdu.
This object MUST always be instantiated, even if the log can contain Notifications from only one engine.
Please be aware that the nlmLogEngineTAddress may not uniquely identify the SNMP engine from which the Notification was received. For example, if an SNMP engine uses DHCP or NAT to obtain ip addresses, the address it uses may be shared with other network devices, and hence will not uniquely identify the SNMP engine."
::= { nlmLogEntry 5 }
SYNTAX TDomain
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"Indicates the kind of transport service by which a Notification
was received from an SNMP engine. nlmLogEngineTAddress contains
the transport service address of the SNMP engine from which
this Notification was received.
Possible values for this object are presently found in the Transport Mappings for SNMPv2 document (RFC 1906 [8])."
::= { nlmLogEntry 6 }
SYNTAX SnmpEngineID
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"If the Notification was received in a protocol which has a contextEngineID element like SNMPv3, this object has that value. Otherwise its value is a zero-length string."
::= { nlmLogEntry 7 }
SYNTAX SnmpAdminString
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The name of the SNMP MIB context from which the Notification came.
For SNMPv1 Traps this is the community string from the Trap."
::= { nlmLogEntry 8 }
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The NOTIFICATION-TYPE object identifier of the Notification that
occurred."
::= { nlmLogEntry 9 }
--
-- Log Variable Table
--
SYNTAX SEQUENCE OF NlmLogVariableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A table of variables to go with Notification log entries."
::= { nlmLog 2 }
SYNTAX NlmLogVariableEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A Notification log entry variable.
Entries appear in this table when there are variables in the varbind list of a Notification in nlmLogTable."
INDEX { nlmLogName, nlmLogIndex, nlmLogVariableIndex }
::= { nlmLogVariableTable 1 }
NlmLogVariableEntry ::= SEQUENCE {
nlmLogVariableIndex Unsigned32,
nlmLogVariableID OBJECT IDENTIFIER,
nlmLogVariableValueType INTEGER,
nlmLogVariableCounter32Val Counter32,
nlmLogVariableUnsigned32Val Unsigned32,
nlmLogVariableTimeTicksVal TimeTicks,
nlmLogVariableInteger32Val Integer32,
nlmLogVariableOctetStringVal OCTET STRING,
nlmLogVariableIpAddressVal IpAddress,
nlmLogVariableOidVal OBJECT IDENTIFIER,
nlmLogVariableCounter64Val Counter64,
nlmLogVariableOpaqueVal Opaque
}
SYNTAX Unsigned32 (1..4294967295)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"A monotonically increasing integer, starting at 1 for a given
nlmLogIndex, for indexing variables within the logged
Notification."
::= { nlmLogVariableEntry 1 }
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The variable's object identifier."
::= { nlmLogVariableEntry 2 }
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 must be instantiated, based on this type."
::= { nlmLogVariableEntry 3 }
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'counter32'."
::= { nlmLogVariableEntry 4 }
SYNTAX Unsigned32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'unsigned32'."
::= { nlmLogVariableEntry 5 }
SYNTAX TimeTicks
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'timeTicks'."
::= { nlmLogVariableEntry 6 }
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'integer32'."
::= { nlmLogVariableEntry 7 }
SYNTAX OCTET STRING
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'octetString'."
::= { nlmLogVariableEntry 8 }
SYNTAX IpAddress
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'ipAddress'.
Although this seems to be unfriendly for IPv6, we
have to recognize that there are a number of older
MIBs that do contain an IPv4 format address, known
as IpAddress.
IPv6 addresses are represented using TAddress or
InetAddress, and so the underlying datatype is
OCTET STRING, and their value would be stored in
the nlmLogVariableOctetStringVal column."
::= { nlmLogVariableEntry 9 }
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'objectId'."
::= { nlmLogVariableEntry 10 }
SYNTAX Counter64
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'counter64'."
::= { nlmLogVariableEntry 11 }
SYNTAX Opaque
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The value when nlmLogVariableType is 'opaque'."
::= { nlmLogVariableEntry 12 }
--
-- Conformance
--
notificationLogMIBConformance OBJECT IDENTIFIER ::=
{ notificationLogMIB 3 }
notificationLogMIBCompliances OBJECT IDENTIFIER ::=
{ notificationLogMIBConformance 1 }
notificationLogMIBGroups OBJECT IDENTIFIER ::=
{ notificationLogMIBConformance 2 }
-- Compliance
MODULE -- this module
MANDATORY-GROUPS {
notificationLogConfigGroup,
notificationLogStatsGroup,
notificationLogLogGroup
}
OBJECT nlmConfigGlobalEntryLimit
SYNTAX Unsigned32 (0..4294967295)
MIN-ACCESS read-only
DESCRIPTION
"Implementations may choose a limit and not allow it to be
changed or may enforce an upper or lower bound on the
limit."
OBJECT nlmConfigLogEntryLimit
SYNTAX Unsigned32 (0..4294967295)
MIN-ACCESS read-only
DESCRIPTION
"Implementations may choose a limit and not allow it to be
changed or may enforce an upper or lower bound on the
limit."
OBJECT nlmConfigLogEntryStatus
MIN-ACCESS read-only
DESCRIPTION
"Implementations may disallow the creation of named logs."
GROUP notificationLogDateGroup
DESCRIPTION
"This group is mandatory on systems that keep wall clock
date and time and should not be implemented on systems that
do not have a wall clock date."
::= { notificationLogMIBCompliances 1 }
-- Units of Conformance
OBJECTS {
nlmConfigGlobalEntryLimit,
nlmConfigGlobalAgeOut,
nlmConfigLogFilterName,
nlmConfigLogEntryLimit,
nlmConfigLogAdminStatus,
nlmConfigLogOperStatus,
nlmConfigLogStorageType,
nlmConfigLogEntryStatus
}
STATUS current
DESCRIPTION
"Notification log configuration management."
::= { notificationLogMIBGroups 1 }
OBJECTS {
nlmStatsGlobalNotificationsLogged,
nlmStatsGlobalNotificationsBumped,
nlmStatsLogNotificationsLogged,
nlmStatsLogNotificationsBumped
}
STATUS current
DESCRIPTION
"Notification log statistics."
::= { notificationLogMIBGroups 2 }
OBJECTS {
nlmLogTime,
nlmLogEngineID,
nlmLogEngineTAddress,
nlmLogEngineTDomain,
nlmLogContextEngineID,
nlmLogContextName,
nlmLogNotificationID,
nlmLogVariableID,
nlmLogVariableValueType,
nlmLogVariableCounter32Val,
nlmLogVariableUnsigned32Val,
nlmLogVariableTimeTicksVal,
nlmLogVariableInteger32Val,
nlmLogVariableOctetStringVal,
nlmLogVariableIpAddressVal,
nlmLogVariableOidVal,
nlmLogVariableCounter64Val,
nlmLogVariableOpaqueVal
}
STATUS current
DESCRIPTION
"Notification log data."
::= { notificationLogMIBGroups 3 }
OBJECTS {
nlmLogDateAndTime
}
STATUS current
DESCRIPTION
"Conditionally mandatory notification log data.
This group is mandatory on systems that keep wall
clock date and time and should not be implemented
on systems that do not have a wall clock date."
::= { notificationLogMIBGroups 4 }
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[RFC2571] Harrington, D., Presuhn, R. and B. Wijnen, "An
Architecture for Describing SNMP Management Frameworks",
RFC 2571, April 1999.
[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] Rose, M., "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 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.
Security issues are discussed in Section 3.1.2.
Bob Stewart
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
U.S.A.
Ramanathan Kavasseri
Cisco Systems, Inc.
170 West Tasman Drive
San Jose, CA 95134-1706
U.S.A.
Phone: +1 408 527 2446
EMail: ramk@cisco.com
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