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RFC 4149

Definition of Managed Objects for Synthetic Sources for Performance Monitoring Algorithms

Pages: 39
Proposed Standard

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Network Working Group                                     C. Kalbfleisch
Request for Comments: 4149                                    Consultant
Category: Standards Track                                        R. Cole
                                                                 JHU/APL
                                                            D. Romascanu
                                                                   Avaya
                                                             August 2005


        Definition of Managed Objects for Synthetic Sources for
                   Performance Monitoring Algorithms

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The Internet Society (2005).

Abstract

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it describes objects for configuring Synthetic Sources for Performance Monitoring (SSPM) algorithms.
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Table of Contents

1. Introduction ....................................................2 2. The Internet-Standard Management Framework ......................2 3. Overview ........................................................3 3.1. Terms ......................................................3 4. Relationship to Other MIB modules ...............................4 5. Relationship to Other Work ......................................4 5.1. IPPM .......................................................4 5.2. DISMAN .....................................................5 5.3. RMON .......................................................6 5.4. ApplMIB ....................................................6 5.5. SNMPCONF ...................................................7 5.6. RTFM .......................................................8 5.7. Relationship to Other Work: Summary ........................8 6. MIB Structure ...................................................9 6.1. General Information .......................................10 6.2. Source Configuration ......................................10 6.3. Sink Configuration ........................................10 7. Definitions ....................................................10 8. Security Considerations ........................................32 9. Acknowledgements ...............................................34 10. Normative References ..........................................34 11. Informative References ........................................36

1. Introduction

This memo defines a portion of the Management Information Base (MIB) for use with network management protocols in the Internet community. In particular, it defines a method of describing Synthetic Sources for Performance Monitoring (SSPM). This is useful within the Remote Monitoring (RMON) framework [RFC3577] for performance monitoring in the cases where it is desirable to inject packets into the network for the purpose of monitoring their performance with the other MIBs in that framework. This memo also includes a MIB module. The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in RFC 2119 [RFC2119].

2. The Internet-Standard Management Framework

For a detailed overview of the documents that describe the current Internet-Standard Management Framework, please refer to section 7 of RFC 3410 [RFC3410].
Top   ToC   RFC4149 - Page 3
   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

3. Overview

This document defines a MIB module for the purpose of remotely controlling synthetic sources (or 'active' probes) and sinks in order to enhance remote performance monitoring capabilities within IP networks and services. Much work within the IETF exists related to performance monitoring. One interesting aspect of this body of work is that it does not explicitly define an 'active' probe capability. An active probe capability is complimentary to existing capabilities, and this MIB module is developed to fill this void.

3.1. Terms

The following definitions apply throughout this document: o 'Performance monitoring' is the act of monitoring traffic for the purpose of evaluating a statistic of a metric related to the performance of the system. A performance monitoring system is comprised of a) traffic generators, b) measurement, c) data reduction, and d) reporting. The traffic generators may be natural sources, synthetic sources, or intrusive sources. o A 'synthetic source' is a device or an embedded software program that generates a data packet (or packets) and injects it (or them) onto the path to a corresponding probe or existing server solely in support of a performance monitoring function. A synthetic source may talk intrusively to existing application servers. The design goals for this MIB module are: o Complementing the overall performance management architecture being defined within the RMONMIB WG; refer to the RMONMIB framework document [RFC3577]. This MIB module is defined within the context of the APM-MIB [RFC3729]. o Extensibility: the MIB module should be easily extended to include a greater set of protocols and applications for performance monitoring purposes.
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      o Flexibility: the module should support both round-trip and one-
        way measurements.

      o Security: the control of the source and sink of traffic is
        handled by a management application, and communication is
        recommended via SNMPv3.

   This document is organized as follows.  The next section discusses
   the relationship of this MIB module to others from the RMONMIB and
   Distributed Management (DISMAN) working groups.  Then the structure
   of the MIB module is discussed.  Finally, the MIB module definitions
   are given.

4. Relationship to Other MIB modules

This MIB module is designed to be used in conjunction with the RMON MIB Working Group's two other MIB modules for application performance measurement: Application Performance Measurement MIB [RFC3729] and Transport Performance Metrics MIB [RFC4150]. These MIB modules define reporting capabilities for that framework. The intent of this MIB module is to define a method for injecting packets into the network utilizing probe capabilities defined in the base MIB modules and measured with the reporting MIB modules. Other reporting MIB modules may be used as well. Specifically, this MIB module uses the AppLocalIndex as defined in the APM-MIB to map measurement configuration information to definition and reporting structures defined in the APM-MIB.

5. Relationship to Other Work

Much work has already been done within the IETF that has a direct bearing on the development of active performance probe definitions. This body of work has been addressed in various working groups over the years. In this section, we focus on the work of a) the IP Performance Metrics (IPPM) working group, b) the DISMAN working group, c) the RMON working group, d) the Application MIB (ApplMIB) working group, and e) the Realtime Traffic Flow Measurement (RTFM) working group.

5.1. IPPM

The IPPM working group has defined in detail a set of performance metrics, sampling techniques, and associated statistics for transport-level or connectivity-level measurements. The IPPM framework document [RFC2330] discusses numerous issues concerning sampling techniques, clock accuracy, resolution and skew, wire time versus host time, error analysis, etc. Many of these are
Top   ToC   RFC4149 - Page 5
   considerations for configuration and implementation issues discussed
   below.  The IPPM working group has defined several metrics and their
   associated statistics, including

      + a connectivity metric [RFC2678],

      + one-way delay metric [RFC2679],

      + one-way loss metric [RFC2680],

      + round-trip delay and loss metrics [RFC2681],

      + delay variation metric [RFC3393],

      + a streaming media metric [RFC3432],

      + a throughput metric [EBT] and [TBT], and

      + others are under development.

   These (or a subset) could form the basis for a set of active,
   connectivity-level, probe types designed for monitoring the quality
   of transport services.  A consideration of some of these metrics may
   form a set of work activities and a set of early deliverables for a
   group developing an active probe capability.

   During the early development of the SSPM-MIB, it became apparent that
   a one-way measurement protocol was required in order for the SSPM-MIB
   to control a one-way measurement.  This led to the current work with
   the IPPM WG on the development of the One-Way Measurement Protocol
   (OWDP) [ODP].  This work includes both the measurement protocol
   itself, as well as the development of a separate control protocol.
   This later control protocol is redundant with the current work on the
   SSPM-MIB.  The SSPM-MIB could be used as an alternative to the one-
   way delay control protocol.

5.2. DISMAN

The DISMAN working group has defined a set of 'active' tools for remote management. Of relevance to this document are: + the pingMIB [RFC2925], + the DNS Lookup MIB [RFC2925], + the tracerouteMIB [RFC2925],
Top   ToC   RFC4149 - Page 6
      + the scriptMIB [RFC3165], and

      + the expressionMIB [RFC2982].

   The pingMIB and tracerouteMIB define an active probe capability,
   primarily for the remote determination of path and path connectivity.
   There are some performance-related metrics collected from the
   pingMIB, and one could conceivably use these measurements for the
   evaluation of a limited set of performance statistics.  But there is
   a fundamental difference between determining connectivity and
   determining the quality of that connectivity.  However, in the
   context of performance monitoring, a fault can be viewed as not
   performing at all.  Therefore, both should be monitored with the same
   probes to reduce network traffic.

   The DNS Lookup MIB also includes some probe-like capabilities and
   performance time measurements for the DNS lookup.  This could be used
   to suggest details of a related session-level, active probe.

   The scriptMIB allows a network management application to distribute
   and manage scripts to remote devices.  Conceivably, these scripts
   could be designed to run a set of active probe monitors on remote
   devices.

5.3. RMON

The RMON working group has developed an extensive, passive monitoring capability defined in RFC 2819 [RFC2819] and RFC 2021 [RFC2021] as well as additional MIB modules. Initially, the monitors collected statistics at the MAC layer, but the capability has now been extended to higher-layer statistics. Higher-layer statistics are identified through the definition of a Protocol Directory [RFC2021]. See the RMONMIB framework document [RFC3577] for an overview of the RMONMIB capabilities. Within this context, the development of an active traffic source for performance monitoring fits well within the overall performance monitoring architecture being defined within the RMON WG.

5.4. ApplMIB

The ApplMIB working group defined a series of MIB modules that monitor various aspects of applications, processes, and services. The System Application MIB [RFC2287] describes a basic set of managed objects for fault, configuration, and performance management of applications from a systems perspective. More specifically, the managed objects it defines are restricted to information that can be
Top   ToC   RFC4149 - Page 7
   determined from the system itself and that does not require special
   instrumentation within the applications to make the information
   available.

   The Application MIB [RFC2564] complements the System Application MIB,
   providing for the management of applications' common attributes,
   which could not typically be observed without the cooperation of the
   software being managed.  There are attributes that provide
   information on application and communication performance.

   The WWW MIB [RFC2594] describes a set of objects for managing
   networked services in the Internet Community, particularly World Wide
   Web (WWW) services.  Performance attributes are available for the
   information about each WWW service, each type of request, each type
   of response, and top-accessed documents.

   In the development of synthetic application-level probes,
   consideration should be given to the relationship of the application
   MIB modules to the measurements being performed through a synthetic
   application-level probe.  Similar, cross-indexing issues arise within
   the context of the RMON monitoring and synthetic application-level
   active probes.

5.5. SNMPCONF

The Configuration Management with SNMP (SNMPCONF) working group has created the informational RFC 3512 [RFC3512], which outlines the most effective methods for using the SNMP Framework to accomplish configuration management. This work includes recommendations for device-specific as well as network-wide (Policy) configuration. The group is also chartered to write any MIB modules necessary to facilitate configuration management. Specifically, they will write a MIB module that describes a network entity's capabilities and capacities, which can be used by management entities making policy decisions at a network level or device-specific level. Currently, the SNMPCONF working group is focused on the SNMP Configuration MIB for policy [RFC4011]. It is conceivable that one would want to monitor the performance of newly configured policies as they are implemented within networks. This would require correlation of the implemented policy and a related performance monitoring policy that would specify synthetic probe definitions. For synthetic probes, there would be a need for a configuration of a) a single probe, b) several probes, c) source and destination probes, and d) intermediate probes. In addition, it may be necessary to configure any or all of these combinations simultaneously. It is hoped that the work of SNMPCONF will suffice. The scripting language defined by the SNMP Configuration MIB could allow for active monitoring to be
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   activated and configured from a policy management script.  Further,
   the results of active monitoring could become arguments in further
   policy decisions.  This notion is reflected in the decision flow
   outlined in Figure 1 below.

5.6. RTFM

The Realtime Traffic Flow Measurement (RTFM) working group is concerned with issues relating to traffic flow measurements and usage reporting for network traffic and Internet accounting. Various documents exist that describe requirements [RFC1272], traffic flow measurement architectures [RFC2722], and a traffic flow MIB [RFC2720]. The work in this group is focused on passive measurements of user traffic. As such, its work is related to the monitoring work within the RMON WG. Fundamentally, their attention has not been concerned with methods of active traffic generation.

5.7. Relationship to Other Work: Summary

In summary, the development of an active traffic generation capability (primarily for the purpose of performance monitoring) should draw upon various activities, both past and present, within the IETF. Figure 1 shows the relationship of the various work activities briefly touched upon in this section. Horizontally, across the top of the figure are overall control functions, which would coordinate the various aspects of the performance monitoring systems. Vertically at the bottom of the figure are the functions which comprise the minimum performance monitoring capability; i.e., traffic generation, monitoring and measurements, and data reduction. Traffic generation is addressed in this MIB module. Monitoring and measurement is addressed in the APM-MIB [RFC3729] and TPM-MIB [RFC4150] modules. Data reduction is not yet addressed within the IETF. But data reduction could include both spatial and temporal aggregations at different levels of reduction. This is indicated in the figure by the arrow labeled "Various levels and span".
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                                   +-----------------------------------+
                                   |                                   |
                                   V                                   |
                +------------------------------------------+           |
         +------| Application [script], [expr], [snmpconf],|---+       |
         |      |        [apmmib]                          |   |       |
         |      +------------------------------------------+   |       |
         |                         |                           |       |
      +--------------------------------+                       |       |
      |    Synchronization Control     |                       |       |
      +--------------------------------+                       |       |
         |                         |                           |       |
         V                         V                           V       |
   +----------------+  +----------------------+  +-------------------+ |
   | Traffic        |  |Monitoring Metrics    |  |Data Reduction     | |
   |  Generation    |  |Control [rmon],[ippm],|  |Control [applmib], | |
   |  Control [sspm]|  | [applmib]            |  |[wwwservmib],[expr]| |
   +----------------+  +----------------------+  +-------------------+ |
         |                         |                           |       |
         |                         |                           |       |
         V                         V                           V       |
   +------------------+   +-------------------+     +----------------+ |
   |Traffic Generation|   |Monitoring Metrics |     |Data Reduction  | |
   |   Instrumentation|   |   Instrumentation | +-->| Instrumentation| |
   +------------------+   +-------------------+ |   +----------------+ |
                                                |              |       |
                                                |              |       |
                                 Various levels |              |       |
                                    and span    +--------------|       |
                                                               |       |
                                                               |       |
                                                               V       |
                                                            Reports ---+

    Figure 1: Coverage for an overall performance monitoring system

6. MIB Structure

This section presents the structure of the MIB module. The objects are arranged into the following groups: o general information o source configuration o sink configuration
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6.1. General Information

This section provides general information about the capabilities of the probe. Currently, this information is related to the resolution of the probe clock and its source.

6.2. Source Configuration

The source is configured with a pair of tables. The first, sspmSourceProfileTable, defines a set of profiles for monitoring. These profiles are then used by the second table, sspmSourceControlTable, to instantiate a specific measurement. This MIB module takes an IP-centric view of the configuration of the measurement.

6.3. Sink Configuration

Configures the sink for measurements. If the test is round-trip, then this table is on the same probe as the source configuration. If the test is one-way, then the table is on a different probe. The sspmSinkInstance is a unique identifier for the entry per probe. Additional attributes are provided for test type and test source to identify entries in the table uniquely.

7. Definitions

SSPM-MIB DEFINITIONS ::= BEGIN IMPORTS MODULE-IDENTITY, OBJECT-TYPE, Counter32, Integer32, Unsigned32 FROM SNMPv2-SMI --[RFC2578] TEXTUAL-CONVENTION, StorageType, TruthValue, RowStatus FROM SNMPv2-TC --[RFC2579] MODULE-COMPLIANCE, OBJECT-GROUP FROM SNMPv2-CONF --[RFC2578, -- RFC2579, -- RFC2580] OwnerString, rmon FROM RMON-MIB --[RFC2819] InetAddressType, InetAddress FROM INET-ADDRESS-MIB --[RFC3291]
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          InterfaceIndexOrZero
                                      FROM IF-MIB  --[RFC2863]

          AppLocalIndex
                                      FROM APM-MIB  --[RFC3729]

          Utf8String
                                      FROM SYSAPPL-MIB;  --[RFC2287]

      sspmMIB MODULE-IDENTITY
          LAST-UPDATED "200507280000Z"  -- July 28, 2005
          ORGANIZATION "IETF RMON MIB working group"
          CONTACT-INFO
              "        Carl W. Kalbfleisch
                       Consultant

               E-mail: ietf@kalbfleisch.us

               Working group mailing list: rmonmib@ietf.org
               To subscribe send email to rmonmib-request@ietf.org"
          DESCRIPTION
              "This SSPM MIB module is applicable to probes
               implementing Synthetic Source for Performance
               Monitoring functions.

               Copyright (C) The Internet Society (2005).  This version
               of this MIB module is part of RFC 4149; see the RFC
               itself for full legal notices."

             -- revision history

             REVISION    "200507280000Z"   -- July 28, 2005
             DESCRIPTION
                 "The original version of this MIB module,
                 was published as RFC4149."
             ::= { rmon 28 }

   --
   -- Object Identifier Assignments
   --
   sspmMIBObjects       OBJECT IDENTIFIER ::= { sspmMIB 1 }
   sspmMIBNotifications OBJECT IDENTIFIER ::= { sspmMIB 2 }
   sspmMIBConformance   OBJECT IDENTIFIER ::= { sspmMIB 3 }

   --
   -- Textual Conventions
   --
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   SspmMicroSeconds ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d"
       STATUS current
       DESCRIPTION
           "A unit of time with resolution of MicroSeconds."
       SYNTAX Unsigned32

   SspmClockSource ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d"
       STATUS current
       DESCRIPTION
           "An indication of the source of the clock as defined by the
            NTP specification RFC1305 [RFC1305] definition of stratum:

            Stratum (sys.stratum, peer.stratum, pkt.stratum): This is
            an integer indicating the stratum of the local clock,
            with values defined as follows:

            0      unspecified

            1      primary reference (e.g., calibrated atomic clock,
                   radio clock)

            2-255  secondary reference (via NTP)."
       REFERENCE
           "RFC1305."
       SYNTAX Integer32 (0..255)

   SspmClockMaxSkew ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d"
       STATUS current
       -- UNITS "Seconds"
       DESCRIPTION
           "An indication of the accuracy of the clock as defined by
            RFC1305.  This variable indicates the maximum offset
            error due to skew of the local clock over the
            time interval 86400 seconds, in seconds."
       REFERENCE
           "RFC1305."
       SYNTAX Integer32 (1..65535)

   --
   -- sspmGeneral
   --
   sspmGeneral           OBJECT IDENTIFIER ::= { sspmMIBObjects 1 }
   sspmGeneralClockResolution OBJECT-TYPE
       SYNTAX      SspmMicroSeconds
       MAX-ACCESS  read-only
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       STATUS      current
       -- UNITS       Microseconds
       DESCRIPTION
           "A read-only variable indicating the resolution
         of the measurements possible by this device."
       ::= { sspmGeneral 1 }

   sspmGeneralClockMaxSkew OBJECT-TYPE
       SYNTAX SspmClockMaxSkew
       MAX-ACCESS read-only
       STATUS current
       -- UNITS Seconds
       DESCRIPTION
           "A read-only variable indicating the maximum offset
            error due to skew of the local clock over the
            time interval 86400 seconds, in seconds."
       ::= { sspmGeneral 2 }


   sspmGeneralClockSource OBJECT-TYPE
       SYNTAX SspmClockSource
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "A read-only variable indicating the source of the clock.
            This is provided to allow a user to determine how accurate
            the timing mechanism is compared with other devices.  This
            is needed for the coordination of time values
            between probes for one-way measurements."
       ::= { sspmGeneral 3 }

   sspmGeneralMinFrequency OBJECT-TYPE
       SYNTAX     SspmMicroSeconds
       MAX-ACCESS read-only
       -- units   MicroSeconds
       STATUS     current
       DESCRIPTION
            "A read-only variable that indicates the devices'
             capability for the minimum supported
             sspmSourceFrequency.  If sspmSourceFrequency is
             set to a value lower than the value reported
             by this attribute, then the set of sspmSourceFrequency
             will fail with an inconsistent value error."
       ::= { sspmGeneral 4 }

   --
   -- sspmCapabilities
   --
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   -- Describes the capabilities of the SSPM device.
   --
   sspmCapabilitiesTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF SspmCapabilitiesEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The table of SSPM capabilities."
       ::= { sspmGeneral 5 }

   sspmCapabilitiesEntry OBJECT-TYPE
       SYNTAX      SspmCapabilitiesEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Details about a particular SSPM capability."
       INDEX { sspmCapabilitiesInstance }
       ::= { sspmCapabilitiesTable 1 }

   SspmCapabilitiesEntry ::= SEQUENCE {
       sspmCapabilitiesInstance AppLocalIndex
       }

   sspmCapabilitiesInstance OBJECT-TYPE
       SYNTAX      AppLocalIndex
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "Indicates whether SSPM configuration of the corresponding
            AppLocalIndex is supported by this device.  Generally,
            entries in this table are only made by the device when the
            configuration of the measurement is available."
        ::= { sspmCapabilitiesEntry 1 }

   --
   -- sspmSource
   --
   -- Contains the details of the source of the
   -- Synthetic Sources for Performance Monitoring algorithms.
   -- This information is split into two tables.  The first defines
   -- profiles that can be applied to specific sources in the
   -- control table.
   --
   sspmSource           OBJECT IDENTIFIER ::= { sspmMIBObjects 2 }

   --
   -- sspmSourceProfileTable
   -- Defines template profiles for measurements.
Top   ToC   RFC4149 - Page 15
   --
   sspmSourceProfileTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF SspmSourceProfileEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The table of SSPM Source Profiles configured."
       ::= { sspmSource 1 }

   sspmSourceProfileEntry OBJECT-TYPE
       SYNTAX      SspmSourceProfileEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Details about a particular SSPM Source Profile
            configuration.  Entries must exist in this table
            in order to be referenced by rows in the
            sspmSourceControlTable."
       INDEX { sspmSourceProfileInstance }
       ::= { sspmSourceProfileTable 1 }

   SspmSourceProfileEntry ::= SEQUENCE {
       sspmSourceProfileInstance           Unsigned32,
       sspmSourceProfileType               AppLocalIndex,
       sspmSourceProfilePacketSize         Unsigned32,
       sspmSourceProfilePacketFillType     INTEGER,
       sspmSourceProfilePacketFillValue    OCTET STRING,
       sspmSourceProfileTOS                Integer32,
       sspmSourceProfileFlowLabel          Integer32,
       sspmSourceProfileLooseSrcRteFill    OCTET STRING,
       sspmSourceProfileLooseSrcRteLen     Integer32,
       sspmSourceProfileTTL                Integer32,
       sspmSourceProfileNoFrag             TruthValue,
       sspmSourceProfile8021Tagging        Integer32,
       sspmSourceProfileUsername           Utf8String,
       sspmSourceProfilePassword           Utf8String,
       sspmSourceProfileParameter          OCTET STRING,
       sspmSourceProfileOwner              OwnerString,
       sspmSourceProfileStorageType        StorageType,
       sspmSourceProfileStatus             RowStatus
   }

   sspmSourceProfileInstance OBJECT-TYPE
       SYNTAX      Unsigned32 (1..65535)
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An arbitrary index."
Top   ToC   RFC4149 - Page 16
        ::= { sspmSourceProfileEntry 1 }

   sspmSourceProfileType OBJECT-TYPE
       SYNTAX      AppLocalIndex
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The AppLocalIndex value that uniquely identifies the
            measurement per the APM-MIB.  In order to create a row
            in this table, there must be a corresponding row in the
            sspmCapabilitiesTable.

            When attempting to set this object, if no
            corresponding row exists in the sspmCapabilitiesTable,
            then the agent should return a 'badValue' error."
       ::= { sspmSourceProfileEntry 2}

   sspmSourceProfilePacketSize OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The size of packet to be transmitted in bytes.  The
            size accounts for all data within the IPv4 or IPv6
            payloads, excluding the IP headers, IP header options
            and link-level protocol headers.

            If the size is set smaller than the minimum allowed
            packet size or greater than the maximum allowed
            packet size, then the set should fail, and the agent
            should return a 'badValue' error."
       ::= { sspmSourceProfileEntry 3 }

   sspmSourceProfilePacketFillType OBJECT-TYPE
       SYNTAX      INTEGER {
                           random (1),
                           pattern (2),
                           url(3)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Indicates how the packet is filled.

            'random' indicates that the packet contains random
            data patterns.  This is probe and implementation
            dependent.
Top   ToC   RFC4149 - Page 17
            'pattern' indicates that the pattern defined in the
            sspmSourceProfilePacketFillValue attribute is used to
            fill the packet.

            'url' indicates that the value of
            sspmSourceProfilePacketFillValue should
            contain a URL.  The contents of the document
            at that URL are retrieved when sspmSourceStatus becomes
            active and utilized in the packet.  If the attempt to
            access that URL fails, then the row status is set to
            'notReady', and the set should fail with
            'inconsistentValue'.  This value must contain a
            dereferencable URL of the type 'http:', 'https:', or
            'ftp:' only."
       ::= { sspmSourceProfileEntry 4 }

   sspmSourceProfilePacketFillValue OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE(0..255))
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The string value with which to fill the packet.  If
            sspmSourceProfilePacketFillType is set to 'pattern',
            then this pattern is repeated until the packet is
            sspmSourcePacketSize in bytes.  Note that if the
            length of the octet string specified for this
            value does not divide evenly into the packet
            size, then an incomplete last copy of this data
            may be copied into the packet.  If the value of
            sspmSourceProfilePacketFillType is set to 'random', then
            this attribute is unused.  If the value of the
            sspmSourceProfilePacketFillType is set to 'url', then
            the URL specified in this attribute is retrieved
            and used by the probe.  In the case of a URL, this value
            must contain a dereferencable URL of the type
            'http:', 'https:', or 'ftp:' only."
       ::= { sspmSourceProfileEntry 5 }

   sspmSourceProfileTOS OBJECT-TYPE
       SYNTAX      Integer32 (0..255)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Represents the TOS field in the IP packet header.  The
           value of this object defaults to zero if not set."
       DEFVAL { 0 }
       ::= { sspmSourceProfileEntry 6 }
Top   ToC   RFC4149 - Page 18
   sspmSourceProfileFlowLabel OBJECT-TYPE
       SYNTAX      Integer32 (0..1048575) -- 20-bit range (0 to 0xfffff)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "This object is used to specify the Flow Label in a IPv6
            packet (RFC 2460) to force special handling by the IPv6
            routers; e.g., non-default quality-of-service handling.

            This object is meaningful only when the object
            sspmSourceDestAddressType is IPv6(2).
            The value of this object defaults to zero if not set."
       DEFVAL { 0 }
       ::= { sspmSourceProfileEntry 7 }

   sspmSourceProfileLooseSrcRteFill OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE(0..240))
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "In the event that the test should run over a
            specific route, the intent is to force the route using the
            Loose Source Route option in IPv4 [RFC791] and
            IPv6 [RFC2460].  This object contains a
            series of IP addresses along the path that would be
            put into the loose source route option in the IP header.

            The IPv4 addresses are to be listed as 32-bit
            address values, and the IPv6 addresses are to be
            listed as a string of 128-bit addresses.  The
            maximum length allowed within the IPv4 source route
            option is 63 addresses.  To simply account for
            IPv6 addresses as well, the maximum length of the
            octet string is 240.  This allows up to 60
            IPv4 addresses or up to 15 IPv6 addresses in the
            string."
       ::= { sspmSourceProfileEntry 8 }

   sspmSourceProfileLooseSrcRteLen OBJECT-TYPE
       SYNTAX      Integer32(0..240)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "In the event that the test should run over a
            specific route, the intent is to force the route.
            This attribute specifies the length of data to
            be copied from the sspmSourceProfileLooseSrcRteFill
            into the route data fields of the loose source route
Top   ToC   RFC4149 - Page 19
            options in the IPv4 or IPv6 headers."
       ::= { sspmSourceProfileEntry 9 }

   sspmSourceProfileTTL OBJECT-TYPE
       SYNTAX      Integer32(1..255)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
            "If non-zero, this specifies the value to place into
            the TTL field on transmission."
       ::= { sspmSourceProfileEntry 10 }

   sspmSourceProfileNoFrag OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "When true, the 'Don't Fragment Bit' should be set
            on the packet header."
       ::= { sspmSourceProfileEntry 11 }

   sspmSourceProfile8021Tagging OBJECT-TYPE
       SYNTAX      Integer32 (-1..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "IEEE 802.1Q tagging used in IEEE 802.1D bridged
           environments.

           A value of -1 indicates that the packets are untagged.

           A value of 0 to 65535 is the value of the tag to be
           inserted in the tagged packets.

           Note that according to IEEE 802.1Q, VLAN-ID tags with
           a value of 4095 shall not be transmitted on the wire.
           As the VLAN-ID is encoded in the 12 least significant
           bits on the tag, values that translate in a binary
           representation of all 1's in the last 12 bits
           SHALL NOT be configured.  In this case, the set should
           fail, and return an error-status of 'inconsistentValue'."
       ::= { sspmSourceProfileEntry 12 }

   sspmSourceProfileUsername OBJECT-TYPE
       SYNTAX      Utf8String
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
Top   ToC   RFC4149 - Page 20
           "An optional username used by the application protocol."
       ::= { sspmSourceProfileEntry 13 }

   sspmSourceProfilePassword OBJECT-TYPE
       SYNTAX      Utf8String
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "An optional password used by the application protocol."
       ::= { sspmSourceProfileEntry 14 }

   sspmSourceProfileParameter OBJECT-TYPE
       SYNTAX      OCTET STRING (SIZE(0..65535))
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
            "An optional parameter used by the application protocol.
            For DNS, this would be the hostname or IP.  For HTTP,
            this would be the URL.  For nntp, this would be the
            news group.  For TCP, this would be the port number.
            For SMTP, this would be the recipient (and could
            assume the message is predefined)."
       ::= { sspmSourceProfileEntry 15 }

   sspmSourceProfileOwner OBJECT-TYPE
       SYNTAX      OwnerString
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Name of the management station/application that
           set up the profile."
       ::= { sspmSourceProfileEntry 16 }

   sspmSourceProfileStorageType OBJECT-TYPE
       SYNTAX      StorageType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The storage type of this sspmSourceProfileEntry.  If the
           value of this object is 'permanent', no objects in this row
           need to be writable."
       ::= { sspmSourceProfileEntry 17 }

   sspmSourceProfileStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
Top   ToC   RFC4149 - Page 21
           "Status of this profile.

           An entry may not exist in the active state unless all
           objects in the entry have an appropriate value.

           Once this object is set to active(1), no objects in the
           sspmSourceProfileTable can be changed."
       ::= { sspmSourceProfileEntry 18 }

   --
   -- sspmSourceControlTable
   -- Defines specific measurement instances based on template
   -- profiles in the sspmSourceProfileTable which must be
   -- pre-configured.
   --

   sspmSourceControlTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF SspmSourceControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The table of SSPM measurements configured."
       ::= { sspmSource 2 }

   sspmSourceControlEntry OBJECT-TYPE
       SYNTAX      SspmSourceControlEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "Details about a particular SSPM configuration."
       INDEX { sspmSourceControlInstance }
       ::= { sspmSourceControlTable 1 }

   SspmSourceControlEntry ::= SEQUENCE {
       sspmSourceControlInstance          Unsigned32,
       sspmSourceControlProfile           Integer32,
       sspmSourceControlSrc               InterfaceIndexOrZero,
       sspmSourceControlDestAddrType      InetAddressType,
       sspmSourceControlDestAddr          InetAddress,
       sspmSourceControlEnabled           TruthValue,
       sspmSourceControlTimeOut           SspmMicroSeconds,
       sspmSourceControlSamplingDist      INTEGER,
       sspmSourceControlFrequency         SspmMicroSeconds,
       sspmSourceControlFirstSeqNum       Unsigned32,
       sspmSourceControlLastSeqNum        Unsigned32,
       sspmSourceControlOwner             OwnerString,
       sspmSourceControlStorageType       StorageType,
       sspmSourceControlStatus            RowStatus
Top   ToC   RFC4149 - Page 22
   }

   sspmSourceControlInstance OBJECT-TYPE
       SYNTAX      Unsigned32 (1..65535)
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An arbitrary index."
        ::= { sspmSourceControlEntry 1 }

   sspmSourceControlProfile OBJECT-TYPE
       SYNTAX      Integer32 (1..65535)
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "A pointer to the profile (sspmSourceProfileEntry) that
            this control entry uses to define the test being
            performed."
        ::= { sspmSourceControlEntry 2 }

   sspmSourceControlSrc OBJECT-TYPE
       SYNTAX      InterfaceIndexOrZero
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The ifIndex where the packet should originate from the
            probe (if it matters).  A value of zero indicates that
            it does not matter and that the device decides."
       ::= { sspmSourceControlEntry 3 }

   sspmSourceControlDestAddrType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of Internet address by which the destination
            is accessed."
       ::= { sspmSourceControlEntry 4 }

   sspmSourceControlDestAddr OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The Internet address for the destination.  The formatting
           of this object is controlled by the
           sspmSourceControlDestAddrType object above.
Top   ToC   RFC4149 - Page 23
           When this object contains a DNS name, then the name is
           resolved to an address each time measurement is to be made.
           Further, the agent should not cache this address,
           but instead should perform the resolution prior to each
           measurement."
       ::= { sspmSourceControlEntry 5 }

   sspmSourceControlEnabled OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "When set to 'true', this test is enabled.  When set to
            'false', it is disabled."
       ::= { sspmSourceControlEntry 6 }

   sspmSourceControlTimeOut OBJECT-TYPE
       SYNTAX      SspmMicroSeconds
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Timeout value for the measurement response.  If no
            response is received in the time specified, then
            the test fails."
       ::= { sspmSourceControlEntry 7 }

   sspmSourceControlSamplingDist OBJECT-TYPE
       SYNTAX      INTEGER {
                            deterministic(1),
                            poisson(2)
                   }
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "When this attribute is set to 'deterministic', then
            packets are generated at with a fixed inter-packet
            injection time specified by sspmSourceFrequency.

            When this attribute is set to 'Poisson', then packets
            are generated with inter-packet injection times sampled
            from an exponential distribution with the single
            distributional parameter determined by the inverse
            frequency)."
       ::= { sspmSourceControlEntry 8 }

   sspmSourceControlFrequency OBJECT-TYPE
       SYNTAX      SspmMicroSeconds
       MAX-ACCESS  read-create
Top   ToC   RFC4149 - Page 24
       STATUS      current
       DESCRIPTION
           "The inverse of this value is the rate at which packets
            are generated.  Refer to sspmSourceSamplingDistribution.
            If the value set is less than the value of
            sspmGeneralMinFrequency, then the set will fail with an
            error-status of 'inconsistentValue'."
       ::= { sspmSourceControlEntry 9 }

   sspmSourceControlFirstSeqNum OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The first sequence number of packets to be transmitted."
       ::= { sspmSourceControlEntry 10 }

   sspmSourceControlLastSeqNum OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The last sequence number transmitted.  This value is updated
            by the agent after packet generation."
       ::= { sspmSourceControlEntry 11 }

   sspmSourceControlOwner OBJECT-TYPE
       SYNTAX      OwnerString
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Name of the management station/application that set
           up the test."
       ::= { sspmSourceControlEntry 12 }

   sspmSourceControlStorageType OBJECT-TYPE
       SYNTAX      StorageType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The storage type of this sspmSourceControlEntry.  If the
           value of this object is 'permanent', no objects in this row
           need to be writable."
       ::= { sspmSourceControlEntry 13 }

   sspmSourceControlStatus OBJECT-TYPE
       SYNTAX      RowStatus
       MAX-ACCESS  read-create
Top   ToC   RFC4149 - Page 25
       STATUS      current
       DESCRIPTION
           "Status of this source control entry.

           An entry may not exist in the active state unless all
           objects in the entry have an appropriate value.

           When this attribute has the value of
           'active', none of the read-write or read-create attributes
           in this table may be modified, with the exception of
           sspmSourceControlEnabled."
       ::= { sspmSourceControlEntry 14 }

   --
   -- sspmSinkTable
   --
   -- Contains attributes for configuration of Synthetic
   -- Sources for Performance Monitoring sinks, i.e.,
   -- sinks for receipt of one-way delay measurements.
   --
   sspmSink           OBJECT IDENTIFIER ::= { sspmMIBObjects 5 }

   sspmSinkTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF SspmSinkEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "A table configuring the sink for measurements."
       ::= { sspmSink 1 }

   sspmSinkEntry OBJECT-TYPE
       SYNTAX      SspmSinkEntry
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "The details of a particular sink entry.  If the measurement
            is a round-trip type, then the sink entry will be on the
            same probe as the corresponding sspmSourceEntry.  If the
            measurement is a one-way, type then the sink entry will be
            on a different probe."
       INDEX { sspmSinkInstance }
       ::= { sspmSinkTable 1}

   SspmSinkEntry ::= SEQUENCE {
       sspmSinkInstance                       Unsigned32,
       sspmSinkType                           AppLocalIndex,
       sspmSinkSourceAddressType              InetAddressType,
       sspmSinkSourceAddress                  InetAddress,
Top   ToC   RFC4149 - Page 26
       sspmSinkExpectedRate                   SspmMicroSeconds,
       sspmSinkEnable                         TruthValue,
       sspmSinkExpectedFirstSequenceNum       Unsigned32,
       sspmSinkLastSequenceNumber             Unsigned32,
       sspmSinkLastSequenceInvalid            Counter32,
       sspmSinkStorageType                    StorageType,
       sspmSinkStatus                         RowStatus
   }

   sspmSinkInstance OBJECT-TYPE
       SYNTAX      Unsigned32 (1..65535)
       MAX-ACCESS  not-accessible
       STATUS      current
       DESCRIPTION
           "An index.  When the measurement is for a round-trip
            measurement, then this table entry is on the same probe as
            the corresponding sspmSourceEntry, and the value of this
            attribute should correspond to the value of
            sspmSourceInstance.  Management applications configuring
            sinks for one-way measurements could define some
            scheme whereby the sspmSinkInstance is unique across
            all probes.  Note that the unique key to this entry is
            also constructed with sspmSinkType,
            sspmSinkSourceAddressType, and sspmSinkSourceAddress.
            To make the implementation simpler, those other
            attributes are not included in the index but uniqueness
            is still needed to receive all the packets."
        ::= { sspmSinkEntry 1 }

   sspmSinkType OBJECT-TYPE
       SYNTAX      AppLocalIndex
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The AppLocalIndex value that uniquely identifies the
            measurement per the APM-MIB.  In order to create a row
            in this table, there must be a corresponding row in the
            sspmCapabilitiesTable.  If there is no corresponding
            row in the sspmCapabilitiestable, then the agent will
            return an error-status of 'inconsistentValue'."
       ::= { sspmSinkEntry 2}

   sspmSinkSourceAddressType OBJECT-TYPE
       SYNTAX      InetAddressType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The type of Internet address of the source."
Top   ToC   RFC4149 - Page 27
       ::= { sspmSinkEntry 3 }

   sspmSinkSourceAddress OBJECT-TYPE
       SYNTAX      InetAddress
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The Internet address of the source.  The formatting
           of this object is controlled by the sspmSinkSourceAddressType
           object above.

           This object should be set only to a valid device address
           that has been administratively configured into the
           device.  If a set attempts to set this object to an
           address that does not belong (i.e., is not administratively
           configured into the device), the set should fail, and the
           agent should return a error-status of 'inconsistentValue'."
       ::= { sspmSinkEntry 4 }

   sspmSinkExpectedRate OBJECT-TYPE
       SYNTAX      SspmMicroSeconds
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The expected rate at which packets will arrive."
       ::= { sspmSinkEntry 5 }

   sspmSinkEnable OBJECT-TYPE
       SYNTAX      TruthValue
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "Indicates if the sink is enabled or not."
       ::= { sspmSinkEntry 6 }

   sspmSinkExpectedFirstSequenceNum OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The expected first sequence number of packets.
            This is used by the sink to determine if packets
            were lost at the initiation of the test."
       ::= { sspmSinkEntry 7 }

   sspmSinkLastSequenceNumber OBJECT-TYPE
       SYNTAX      Unsigned32
       MAX-ACCESS  read-only
Top   ToC   RFC4149 - Page 28
       STATUS      current
       DESCRIPTION
           "The last sequence number received."
       ::= { sspmSinkEntry 8 }

   sspmSinkLastSequenceInvalid OBJECT-TYPE
       SYNTAX      Counter32
       MAX-ACCESS  read-only
       STATUS      current
       DESCRIPTION
           "The number of packets that arrived whose
            sequence number was not one plus the value of
            sspmSinkLastSequenceNumber."
       ::= { sspmSinkEntry 9 }

   sspmSinkStorageType OBJECT-TYPE
       SYNTAX      StorageType
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
           "The storage type of this sspmSinkEntry.  If the value
           of this object is 'permanent', no objects in this row
           need to be writable."
       ::= { sspmSinkEntry 10 }

   sspmSinkStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS  read-create
       STATUS      current
       DESCRIPTION
            "Status of this conceptual row.
            An entry may not exist in the active state unless all
            objects in the entry have an appropriate value.

            Once this object is set to active(1), no objects with
            MAX-ACCESS of read-create in the sspmSinkTable can
            be changed."
       ::= { sspmSinkEntry 11 }

   --
   -- Notifications
   --

   --
   -- Conformance information
   --
   sspmCompliances OBJECT IDENTIFIER ::= { sspmMIBConformance 1 }
   sspmGroups      OBJECT IDENTIFIER ::= { sspmMIBConformance 2 }
Top   ToC   RFC4149 - Page 29
   -- Compliance Statements
   sspmGeneralCompliance MODULE-COMPLIANCE
     STATUS current
     DESCRIPTION
       "A general compliance that allows all things to be optional."
     MODULE -- this module

     MANDATORY-GROUPS { sspmGeneralGroup }

     GROUP sspmSourceGroup
     DESCRIPTION
       "The SSPM Source Group is optional."

     GROUP sspmSinkGroup
     DESCRIPTION
       "The SSPM Sink Group is optional."

     GROUP sspmUserPassGroup
     DESCRIPTION
       "The SSPM User Pass Group is optional."

     ::= { sspmCompliances 1 }

   --
   -- SSPM Source Compliance
   --
   sspmSourceFullCompliance MODULE-COMPLIANCE
     STATUS current
     DESCRIPTION
       "A source compliance.  Use this compliance when implementing
        a traffic-source-only device.  This is useful for implementing
        devices that probe other devices for intrusive application
        monitoring.  It is also useful for implementing the source
        of one-way tests used with a sink-only device."
     MODULE -- this module

     MANDATORY-GROUPS { sspmGeneralGroup, sspmSourceGroup }

     GROUP sspmUserPassGroup
     DESCRIPTION
       "The SSPM User Pass Group is optional."
     ::= { sspmCompliances 2 }

   --
   -- SSPM Sink Compliance
   --
   sspmSinkFullCompliance MODULE-COMPLIANCE
     STATUS current
Top   ToC   RFC4149 - Page 30
     DESCRIPTION
       "A sink-only compliance.  Use this compliance when implementing a
        sink-only device.  This is useful for devices to receive one-way
        measurements."
     MODULE -- this module

     MANDATORY-GROUPS { sspmGeneralGroup, sspmSinkGroup }

     ::= { sspmCompliances 3 }

   --
   -- Groups
   --
   sspmGeneralGroup OBJECT-GROUP
       OBJECTS {
       sspmGeneralClockResolution,
       sspmGeneralClockMaxSkew,
       sspmGeneralClockSource,
       sspmGeneralMinFrequency,
       sspmCapabilitiesInstance
       }
       STATUS      current
       DESCRIPTION
           "The objects in the SSPM General Group."
       ::= { sspmGroups 1 }

   sspmSourceGroup OBJECT-GROUP
       OBJECTS {
       sspmSourceProfileType,
       sspmSourceProfilePacketSize,
       sspmSourceProfilePacketFillType,
       sspmSourceProfilePacketFillValue,
       sspmSourceProfileTOS,
       sspmSourceProfileFlowLabel,
       sspmSourceProfileLooseSrcRteFill,
       sspmSourceProfileLooseSrcRteLen,
       sspmSourceProfileTTL,
       sspmSourceProfileNoFrag,
       sspmSourceProfile8021Tagging,
       sspmSourceProfileUsername,
       sspmSourceProfilePassword,
       sspmSourceProfileParameter,
       sspmSourceProfileOwner,
       sspmSourceProfileStorageType,
       sspmSourceProfileStatus,
       sspmSourceControlProfile,
       sspmSourceControlSrc,
       sspmSourceControlDestAddrType,
Top   ToC   RFC4149 - Page 31
       sspmSourceControlDestAddr,
       sspmSourceControlEnabled,
       sspmSourceControlTimeOut,
       sspmSourceControlSamplingDist,
       sspmSourceControlFrequency,
       sspmSourceControlFirstSeqNum,
       sspmSourceControlLastSeqNum,
       sspmSourceControlOwner,
       sspmSourceControlStorageType,
       sspmSourceControlStatus
       }
       STATUS      current
       DESCRIPTION
           "The objects in the SSPM Source Group."
       ::= { sspmGroups 2 }

   sspmUserPassGroup OBJECT-GROUP
       OBJECTS {
       sspmSourceProfileUsername,
       sspmSourceProfilePassword
       }
       STATUS      current
       DESCRIPTION
           "The objects in the SSPM Username and password group."
       ::= { sspmGroups 3 }

   sspmSinkGroup OBJECT-GROUP
       OBJECTS {
       sspmSinkType,
       sspmSinkSourceAddressType,
       sspmSinkSourceAddress,
       sspmSinkExpectedRate,
       sspmSinkEnable,
       sspmSinkExpectedFirstSequenceNum,
       sspmSinkLastSequenceNumber,
       sspmSinkLastSequenceInvalid,
       sspmSinkStorageType,
       sspmSinkStatus
       }
       STATUS      current
       DESCRIPTION
           "The objects in the SSPM Sink Group."
       ::= { sspmGroups 4 }

   END
Top   ToC   RFC4149 - Page 32

8. Security Considerations

This MIB module defines objects that allow packets to be injected into the network for the purpose of measuring some performance characteristics. As such, the MIB module may contain sensitive network and application data; e.g., user IDs and passwords. Further, if security is compromised, this MIB module could provide a source for denial-of-service, and potential other, attacks. These issues will be addressed within this section. There are a number of management objects defined in this MIB module that have a MAX-ACCESS clause of read-write and/or read-create. Such objects may be considered sensitive or vulnerable in some network environments. The support for SET operations in a non-secure environment without proper protection can have a negative effect on network operations. These are the tables and objects and their sensitivity/vulnerability: + The sspmSourceProfileTable contains objects that configure link- level, IP, and application-level data used within test suites. These objects with a MAX-ACCESS clause of read-write and/or read- create are: o sspmSourcePacketSize - configures the overall size of the test packets, o sspmSourceProfileTOS - sets the TOS field in the IPv4 and IPv6 headers, o sspmSourceProfileLooseSrcRteFill and sspmSourceProfileLooseSrcRteLen - give a list of IPv4 or IPv6 addresses for the loose source route options in the IP headers, o sspmSourceProfileFlowLabel - sets the Flow Label in the IPv6 header, o sspmSourceProfileTTL - sets the TTL field in the packet headers, o sspmSourceProfileNoFrag - sets the No Fragment bit in the packet headers, o sspmSourceProfile8021Tagging - sets the Tag field in the 802.1 headers, and
Top   ToC   RFC4149 - Page 33
         o sspmSourceProfileUsername and sspmSourceProfilePassword -
           these hold the ID and passwords specific to an application
           test profile.,

      + The sspmSourceControlTable contains objects that configure IP
        and application-level data used within a given test.  These
        objects with a MAX-ACCESS clause of read-write and/or read-
        create are:

         o sspmSourceControlSrc - controls the source IP address used on
           the test packets,

         o sspmSourceControlDestAddr - holds the destination address for
           the specific test packet,

         o sspmSourceControlTimeout, sspmSourceControlSamplingDist, and
           sspmSourceControlFrequency - control the nature and frequency
           of the test packet injection onto the network, and

         o sspmSourceControlFirstSeqNum and sspmSourceControlLastSeqNum
           - set the first and last sequence numbers for the specific
           test.

      + The sspmSinkTable contains objects that configure the recipient
        of the test packets.  As such, the objects in this table have no
        security issues related to them.

   Some attributes configure username and password information for some
   application-level protocols as indicated above.  Access to these
   attributes may provide unauthorized use of resources.  These
   attributes are: sspmSourceProfileUsername and
   sspmSourceProfilePassword.

   Some attributes configure the size and rate of traffic flows for the
   purpose of performance measurements.  Access to these attributes may
   exacerbate the use of this MIB module in denial-of-service attacks.
   It is possible to define a maximum packet rate on the device and to
   indicate this rate through the sspmSourceFrequency object.  This
   object reflects the maximum acceptable packet rate that a device
   supporting this MIB module is willing to generate.  This places a
   bound on setting the test packet rate through the
   sspmSourceControlFrequency object.  Other objects that control
   aspects of the test packets related to packet size and rate are
   sspmSourceControlTimeOut, sspmSourceControlSamplingDist and
   sspmSourceControlFrequency.
Top   ToC   RFC4149 - Page 34
   The objects sspmSourceControlSrc, sspmSourceControlDestAddr,
   sspmSourceControlLooseSrcRteFill, and sspmSourceControlLooseSrcRteLen
   control the setting of the source and destination addresses on the
   packet headers and the routing of the packets.  The device should not
   allow the setting of source addresses on the test packets other than
   those that are administratively configured onto the device.  This is
   controlled by using the syntax InterfaceIndexOrZero for the control
   of the source address through the sspmSourceControlSrc object.

   It is thus important to control even GET access to these objects and
   possibly to even encrypt the values of these object when sending them
   over the network via SNMP.  Not all versions of SNMP provide features
   for such a secure environment.

   SNMP versions prior to SNMPv3 did not include adequate security.
   Even if the network itself is secure (for example by using IPSec),
   even then, there is no control as to who on the secure network is
   allowed to access and GET/SET (read/change/create/delete) the objects
   in this MIB module.

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [RFC3410], section 8),
   including full support for the SNMPv3 cryptographic mechanisms (for
   authentication and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module is properly configured to give access to
   the objects only to those principals (users) that have legitimate
   rights to indeed GET or SET (change/create/delete) them.

9. Acknowledgements

This document was produced by the IETF Remote Network Monitoring Working Group. The editors gratefully acknowledge the comments of the following individuals: Andy Bierman, Lester D'Souza, Jim McQuaid, and Steven Waldbusser.

10. Normative References

[RFC791] Postel, J., "Internet Protocol", STD 5, RFC 791, September 1981. [RFC1305] Mills, D., "Network Time Protocol (Version 3) Specification, Implementation and Analysis", RFC 1305, March 1992.
Top   ToC   RFC4149 - Page 35
   [RFC2119]   Bradner, S., "Key words for use in RFCs to Indicate
               Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2287]   Krupczak, C. and J. Saperia, "Definitions of System-Level
               Managed Objects for Applications", RFC 2287, February
               1998.

   [RFC2460]   Deering, S. and R. Hinden, "Internet Protocol, Version 6
               (IPv6) Specification", RFC 2460, December 1998.

   [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.

   [RFC2680]   Almes, G., Kalidindi, S., and M. Zekauskas, "A One-Way
               Packet Loss Metric for IPPM" RFC 2680, September 1999.

   [RFC2863]   McCloghrie, K. and F. Kastenholz, "The Interfaces Group
               MIB", RFC 2863, June 2000.

   [RFC3291]   Daniele, M., Haberman, B., Routhier, S., and J.
               Schoenwaelder, "Textual Conventions for Internet Network
               Addresses ", RFC 3291, May 2002.

   [RFC3393]   Demichelis, C. and P. Chimento, "IP Packet Delay
               Variation Metric for IP Performance Metrics (IPPM)", RFC
               3393, November 2002.

   [RFC3432]   Raisanen, V., Grotefeld, G., and A. Morton, "Network
               Performance Measurement with Periodic Streams", RFC 3432,
               November 2002.

   [RFC3577]   Waldbusser, S., Cole, R.G., Kalbfleisch, C., and D.
               Romascanu, "Introduction to the Remote Monitoring (RMON)
               Family of MIB Modules", RFC 3577, August 2003.

   [RFC3729]   Waldbusser, S., "Application Performance Measurement
               MIB", RFC 3729, March 2004.
Top   ToC   RFC4149 - Page 36
   [RFC4150]   Dietz, R. and R. Cole, "Transport Performance Metrics
               MIB", RFC 4150, August 2005.

11. Informative References

[RFC1272] Mills, C., Hirsch, G., and G. Ruth, "Internet Accounting Background", RFC 1272, November 1991. [RFC2021] Waldbusser, S., "Remote Network Monitoring Management Information Base Version 2 using SMIv2", RFC 2021, January 1997. [RFC2722] Browlee, N., Mills, C., and G. Ruth, "Traffic Flow Measurement: Architecture", RFC 2722, October 1999. [RFC2720] Brownlee, N. "Traffic Flow Measurement: Meter MIB", RFC 2720, October 1999. [RFC2330] Paxson, V., Almes, G., Mahdavi, J., and M. Mathis, "Framework for IP Performance Metrics", RFC 2330, May 1998. [RFC2564] Kalbfleisch, C., Krupczak, C., Presuhn, R., and J. Saperia, "Application Management MIB", RFC 2564, May 1999. [RFC2594] Hazewinkel, H., Kalbfleisch, C., and J. Schoenwaelder, "Definitions of Managed Objects for WWW Services", RFC 2594, May 1999. [RFC3165] Levi, D. and J. Schoenwaelder, "Definitions of Managed Objects for the Delegation of Management Scripts", RFC 3165, August 2001. [RFC2678] Mahdavi, J. and V. Paxson, "IPPM metrics for Measuring Connectivity", RFC 2678, September 1999. [RFC2679] Almes, G., Kalidindi, S., and M. Zekauskas, "A One-way Delay Metric for IPPM", RFC 2679, September 1999. [RFC2681] Almes, G., Kalidindi, S., and M. Zekauskas, "A Round-Trip Delay Metric for IPPM", RFC 2681, September 1999. [RFC2819] Waldbusser, S., "Remote Network Monitoring Management Information Base", STD 59, RFC 2819, February 1995.
Top   ToC   RFC4149 - Page 37
   [RFC2925]   White, K., "Definitions of Managed Objects for Remote
               Ping, Traceroute, and Lookup Operations", RFC 2925,
               September 2000.

   [RFC2982]   Kavasseri, R., "Distributed Management Expression MIB",
               RFC 2982, October 2000.

   [RFC3410]   Case, J., Mundy, R., Partain, D., and B. Stewart,
               "Introduction and Applicability Statements for Internet-
               Standard Management Framework", RFC 3410, December 2002.

   [RFC3512]   MacFaden, M., Partain, D., Saperia, J., and W. Tackabury,
               "Configuring Networks and Devices with Simple Network
               Management Protocol (SNMP)", RFC 3512, April 2003.

   [EBT]       Mathis, M. and M. Allman, "Empirical Bulk Transfer
               Capacity", Work in Progress, October 1999.

   [ODP]       Shalunov, S., Teitelbaum, B., and M. Zekauskas, "A One-
               Way Delay Protocol for IP Performance Measurements", Work
               in Progress, December 2000.

   [RFC4011]   Waldbusser, S., Saperia, J., and T. Hongal, "Policy Based
               Management MIB", RFC 4011, March 2005.

   [TBT]       Mathis, M., "TReno Bulk transfer Capacity", Work in
               Progress, February 1999.
Top   ToC   RFC4149 - Page 38

Authors' Addresses

Carl W. Kalbfleisch Consultant EMail: ietf@kalbfleisch.us Robert G. Cole Johns Hopkins University Applied Physics Laboratory MP2-170 11100 Johns Hopkins Road Laurel, MD 20723-6099 USA Tel: +1 443-778-6951 EMail: robert.cole@jhuapl.edu Dan Romascanu Avaya Atidim Technology Park, Bldg. #3 Tel Aviv, 61131 Israel Tel: +972-3-645-8414 EMail: dromasca@avaya.com
Top   ToC   RFC4149 - Page 39
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