Network Working Group T. Dietz, Ed.
Internet-Draft NEC Europte Ltd.
Expires: April 23, 2004 D. Romascanu
Avaya Inc.
B. Claise
Cisco Systems
October 24, 2003
Definitions of Managed Objects for Packet Sampling
<draft-ietf-psamp-mib-01.txt>
Status of this Memo
This document is an Internet-Draft and is in full conformance with
all provisions of Section 10 of RFC2026.
Internet-Drafts are working documents of the Internet Engineering
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This Internet-Draft will expire on April 23, 2004.
Copyright Notice
Copyright (C) The Internet Society (2003). All Rights Reserved.
Abstract
This memo defines managed objects for packet sampling. These objects
provide information about managed nodes supporting packet sampling,
including packet sampling capabilities, configuration and statistics.
They also allow to configure packet sampling concerning the IP
interface at which packets are sampled, the packet selections methods
used for sampling, and the collector to which packet samples are
exported.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. The Internet-Standard Management Framework . . . . . . . . . 3
3. Structure of the PSAMP MIB module . . . . . . . . . . . . . 3
3.1 The Methods Group . . . . . . . . . . . . . . . . . . . . . 4
3.1.1 Selecting All Packets . . . . . . . . . . . . . . . . . . . 4
3.1.2 Count-based Systematic Sampling . . . . . . . . . . . . . . 4
3.1.3 Time-based Systematic Sampling . . . . . . . . . . . . . . . 6
3.1.4 n-out-of-N Random Sampling . . . . . . . . . . . . . . . . . 6
3.1.5 Probabilistic Sampling . . . . . . . . . . . . . . . . . . . 6
3.2 The Reporting Group . . . . . . . . . . . . . . . . . . . . 7
3.3 The Instance Group . . . . . . . . . . . . . . . . . . . . . 7
4. Defnitions . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Security Considerations . . . . . . . . . . . . . . . . . . 25
6. Open Issues . . . . . . . . . . . . . . . . . . . . . . . . 25
7. Acknowledgment . . . . . . . . . . . . . . . . . . . . . . . 26
Normative References . . . . . . . . . . . . . . . . . . . . 26
Informative References . . . . . . . . . . . . . . . . . . . 26
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . 27
Intellectual Property and Copyright Statements . . . . . . . 28
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1. Introduction
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].
This document is a product of the Packet Sampling (PSAMP) working
group. Its purpose is to define standards-based MIB modules for
monitoring and configuring managed nodes performaing packet sampling.
It is assumed that packet sampling is performed according to the
framework defined in [PS-FMWK]. Packet selection methods considered
in the MIB module are specified in [PS-PSEL]. Configuration of the
export of samples to a collector is modeled according to [PS-TRSP].
Section 2 describes the structure of the PSAMP MIB module and Section
3 contains the formal definition. Security issues are discussed in
Section 5.
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].
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. Structure of the PSAMP MIB module
This first draft does not contain a complete PSAMP MIB module
definition, but some essential components of it sketching the
structure of the complete module. The sketch serves as input to a
discussion of the MIB module structure, particular of the modelling
of capabilities and configured packet sampling instances. Please find
a (not complete) list of open issues at the end of the document.
The PSAMP-MIB module defined below contains three groups of objects:
the methods group, the reporting group, and the instances group.
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3.1 The Methods Group
The first group of objects contains information about sampling
methods. Each sampling method is covered by an indovidual sub-tree of
this group. For each method, the following objects are defined: a
single object indicating the availability of the method, a sub-group
of objects indicating specific capabilities and limits of the method,
and a sub-group specifying sets of parameters. Each parameter set
uniquely specifies all paramerters of a packet sampling instance of
the method.
Methods and parameters of methods are specified in
draft-ietf-psamp-sample-tech-01.txt. So far, objects for four methods
defined in this Internet drafts are contained in the PSAMP MIB module
plus an additional trivial method. Further methods need to be added
later. The five methods are selecting all, count-based systematic
sampling, time-based systematic sampling, n-out-of-N random sampling
and probabilistic sampling.
All methods contain a pointer (OID) to the next sampling method used
after the current sampling method. Thus concatenation of sampling
methods can be realized. Also all parameters sets contain a row
status. TBD: Define usage of RowStatus.
3.1.1 Selecting All Packets
This trivial packet selection method is alway available. If it is
applied, all packets will be selected.
3.1.2 Count-based Systematic Sampling
Count-based systematic sampling is specified in Sections 4 and 5 of
draft-ietf-psamp-sample-tech-01.txt. The first object in this group
is psampSystematicCountBasedSamplingAvailability indicating the
availability of this method.
It is followed by a sub-group of objects specifying capabilities.
psampSystematicCountBasedSamplingMaxInterval indicates the maximum
sampling interval in packets supported by the implementation,
psampSystematicCountBasedSamplingMaxSpacing indicates the maximum
spacing in packets supported by the implementation.
Finally psampSystematicCountBasedSamplingParameterSetTable contains a
parameter set in each of its entries that completely specifies a
configuration of an instance of the packet sampling method. These
parameter sets are not necessarily instantiated at the managed node,
but for each instanciated paramter set of this method, there MUST be
an entry in this table. The parameter set contains two parameters:
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the sampling interval length and the spacing specified in numbers of
packets.
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3.1.3 Time-based Systematic Sampling
Time-based systematic sampling is specified in Sections 4 and 5 of
draft-ietf-psamp-sample-tech-01.txt. The first object in this group
is psampSystematicTimeBasedSamplingAvailability indicating the
availability of this method.
It is followed by a sub-group of objects specifying capabilities.
psampSystematicTimeBasedSamplingMaxInterval indicates the maximum
sampling interval in microseconds supported by the implementation,
psampSystematicTimeBasedSamplingMaxSpacing indicates the maximum
spacing in microseconds supported by the implementation.
Finally psampSystematicTimeBasedSamplingParameterSetTable contains a
parameter set in each of its entries that completely specifies a
configuration of an instance of the packet sampling method. These
parameter sets are not necessarily instantiated at the managed node,
but for each instanciated paramter set of this method, there MUST be
an entry in this table. The parameter set contains two parameters:
the sampling interval length and the spacing specified in
microseconds.
3.1.4 n-out-of-N Random Sampling
n-out-of-N Random sampling is specified in Sections 4 and 5 of
draft-ietf-psamp-sample-tech-01.txt. The first object in this group
is psampRandomOutOfNSamplingAvailability indicating the availability
of this method.
So far, the sub-group of objects specifying capabilities is empty for
this method.
The psampRandomOutOfNSamplingParameterSetTable contains a parameter
set in each of its entries that completely specifies a configuration
of an instance of the packet sampling method. These parameter sets
are not necessarily instantiated at the managed node, but for each
instanciated paramter set of this method, there MUST be an entry in
this table. The parameter set contains a single parameter only, the
sampling rate.
3.1.5 Probabilistic Sampling
Probabilistic sampling is specified in Sections 4 and 5 of
draft-ietf-psamp-sample-tech-01.txt. The first object in this group
is psampRandomProbabilisticSamplingAvailability indicating the
availability of this method.
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So far, the sub-group of objects specifying capabilities is empty for
this method.
The psampRandomProbabilisticSamplingParameterSetTable contains a
parameter set in each of its entries that completely specifies a
configuration of an instance of the packet sampling method. These
parameter sets are not necessarily instantiated at the managed node,
but for each instanciated paramter set of this method, there MUST be
an entry in this table. The parameter set contains a single parameter
only, the sampling rate.
3.2 The Reporting Group
The reporting group of managed objects provides information on
collectors to which sampled packets are exported and they allow to
configure collectors.
The group contains a two tables, the psampCollectorTable and the
psampCollectorGroupTable. Each entry in the psampCollectorTable
specifies a collector by its IP address, used transport protocol and
port number. Also it contains the number of reports sent to this
collector. The psampCollectorGroupTable groups one or more collectors
to a set of collectors where sampled packets are sent to. Thus
reporting to more than one collector at the same time is possible.
3.3 The Instance Group
The instance group of managed objects provides information about
active packet sampling instances at the managed node. It also allows
to create new instances and to terminate them.
The group contains a single table, the psampInstanceTable. Each
entry of this table describes an instance by the IP interface it is
acting at, by the packet selection methods it is executing, and by
the collector to which reports on sampled packets are sent.
Furthermore a start and stop time can be given when the sampling
method should run.
Each method is specified by a reference to a method-specific
parameter set. This parameter set also defines a concatenated list of
sampling methods if supported. Collectors are specified by an index
of the psampCollectorGroupTable.
The following statistics is available for each instance: number of
packets observed by the method.
4. Defnitions
PSAMP-MIB DEFINITIONS ::= BEGIN
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IMPORTS
MODULE-IDENTITY, OBJECT-TYPE, Integer32, mib-2
FROM SNMPv2-SMI -- RFC2578
TEXTUAL-CONVENTION, DateAndTime, RowStatus
FROM SNMPv2-TC -- RFC2579
MODULE-COMPLIANCE, OBJECT-GROUP
FROM SNMPv2-CONF -- RFC2580
InterfaceIndex -- RFC2863
FROM IF-MIB
InetAddressType, InetAddress
FROM INET-ADDRESS-MIB; -- RFC3291
psampMIB MODULE-IDENTITY
LAST-UPDATED "200310240841Z" -- 24 October 2003
ORGANIZATION "IETF Packet Sampling Working Group"
CONTACT-INFO
"WG charter:
http://www.ietf.org/html.charters/psamp-charter.html
Mailing Lists:
General Discussion: psamp@ops.ietf.org
To Subscribe: psamp-request@ops.ietf.org
In Body: subscribe
Archive: https://ops.ietf.org/lists/psamp/
Editor:
Thomas Dietz
NEC Europe Ltd.
Network Laboratories
Kurfuersten-Anlage 36
69115 Heidelberg
Germany
Phone: +49 6221 90511-28
Email: dietz@ccrle.nec.de"
DESCRIPTION
"The PSAMP MIB defines managed objects for packet sampling.
These objects provide information about managed nodes
supporting packet sampling, including packet sampling
capabilities, configuration and statistics. They also allow
to configure packet sampling concerning the IP interface at
which packets are sampled, the packet selections methods used
for sampling, and the collector to which packet samples are
exported.
Copyright (C) The Internet Society (2003). This version
of this MIB module is part of RFC yyyy; see the RFC
itself for full legal notices."
-- RFC Ed.: replace yyyy with actual RFC number & remove this notice
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-- Revision history
REVISION "200310240841Z" -- 24 October 2003
DESCRIPTION
"Initial version, published as RFC yyyy."
-- RFC Ed.: replace yyyy with actual RFC number & remove this notice
::= { mib-2 XXX }
-- XXX to be assigned by IANA.
-- Textual Conventions
PsampMethodAvailability ::= TEXTUAL-CONVENTION
STATUS current
DESCRIPTION
"Used to report the availability of a packet selection method:
available(1) - the method is supported and can be used
notAvailable(2) - the mothos is not available"
SYNTAX INTEGER {
available(1),
notAvailable(2)
}
-- Top level structure of the MIB
psampObjects OBJECT IDENTIFIER ::= { psampMIB 1 }
psampConformance OBJECT IDENTIFIER ::= { psampMIB 2 }
-- Packet selection methods group of objects
psampMethods OBJECT IDENTIFIER ::= { psampObjects 1 }
-- Method 0: Selecting All Packets
psampSelectingAll OBJECT IDENTIFIER ::= { psampMethods 0 }
psampSelectingAllAvailability OBJECT-TYPE
SYNTAX PsampMethodAvailability
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the availability
of the trivial method of selecting all packets."
DEFVAL { available }
::= { psampSelectingAll 1 }
-- Method 1: Systematic Count-based Sampling
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psampSystematicCountBasedSampling OBJECT IDENTIFIER ::= { psampMethods 1 }
psampSystematicCountBasedSamplingAvailability OBJECT-TYPE
SYNTAX PsampMethodAvailability
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the availability
of systematic count-based sampling at the managed node."
DEFVAL { notAvailable }
::= { psampSystematicCountBasedSampling 1 }
psampSystematicCountBasedSamplingCapabilities OBJECT IDENTIFIER
::= { psampSystematicCountBasedSampling 2 }
psampSystematicCountBasedSamplingMaxInterval OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the the maximum
number that can be specified for the sampling interval."
::= { psampSystematicCountBasedSamplingCapabilities 1 }
psampSystematicCountBasedSamplingMaxSpacing OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the the maximum
number that can be specified for the sampling spacing."
::= { psampSystematicCountBasedSamplingCapabilities 2 }
psampSystematicCountBasedSamplingParameterSetTable OBJECT-TYPE
SYNTAX SEQUENCE OF
PsampSystematicCountBasedSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists configurations of systematic count-
based packet sampling. A parameter set describing a
configuration contains two parameters: the sampling
interval length and the spacing."
::= { psampSystematicCountBasedSampling 3 }
psampSystematicCountBasedSamplingParameterSetEntry OBJECT-TYPE
SYNTAX PsampSystematicCountBasedSamplingParameterSetEntry
MAX-ACCESS not-accessible
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STATUS current
DESCRIPTION
"Defines an entry in the
psampSystematicCountBasedSamplingParameterSetTable."
INDEX { psampSystematicCountBasedSamplingIndex }
::= { psampSystematicCountBasedSamplingParameterSetTable 1 }
PsampSystematicCountBasedSamplingParameterSetEntry ::=
SEQUENCE {
psampSystematicCountBasedSamplingIndex Integer32,
psampSystematicCountBasedSamplingInterval Integer32,
psampSystematicCountBasedSamplingSpacing Integer32,
psampSystematicCountBasedSamplingNext OBJECT IDENTIFIER,
psampSystematicCountBasedSamplingRowStatus RowStatus
}
psampSystematicCountBasedSamplingIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index of this parameter set in the
psampSystematicCountBasedSamplingParameterSetTable.
It is used in entries of the psampInstanceTable as
reference to this parameter set."
::= { psampSystematicCountBasedSamplingParameterSetEntry 1 }
psampSystematicCountBasedSamplingInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "number of packets"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the sampling
interval for systematic count-based sampling."
REFERENCE
"draft-ietf-psamp-sample-tech-01.txt, Section 5.1"
::= { psampSystematicCountBasedSamplingParameterSetEntry 2 }
psampSystematicCountBasedSamplingSpacing OBJECT-TYPE
SYNTAX Integer32
UNITS "number of packets"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the sampling
spacing for systematic count-based sampling."
REFERENCE
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"draft-ietf-psamp-sample-tech-01.txt, Section 5.1"
::= { psampSystematicCountBasedSamplingParameterSetEntry 3 }
psampSystematicCountBasedSamplingNext OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the the next sampling
method executed after the current sampling method."
::= { psampSystematicCountBasedSamplingParameterSetEntry 4 }
psampSystematicCountBasedSamplingRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampSystematicCountBasedSamplingParameterSetEntry 5 }
-- Method 2: Systematic Time-based Sampling
psampSystematicTimeBasedSampling OBJECT IDENTIFIER ::= { psampMethods 2 }
psampSystematicTimeBasedSamplingAvailability OBJECT-TYPE
SYNTAX PsampMethodAvailability
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the availability
of systematic time-based sampling at the managed node."
DEFVAL { notAvailable }
::= { psampSystematicTimeBasedSampling 1 }
psampSystematicTimeBasedSamplingCapabilities OBJECT IDENTIFIER
::= { psampSystematicTimeBasedSampling 2 }
psampSystematicTimeBasedSamplingMaxInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "microseconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the the maximum
number that can be specified for the sampling interval."
::= { psampSystematicTimeBasedSamplingCapabilities 1 }
psampSystematicTimeBasedSamplingMaxSpacing OBJECT-TYPE
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SYNTAX Integer32
UNITS "microseconds"
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the the maximum
number that can be specified for the sampling spacing."
::= { psampSystematicTimeBasedSamplingCapabilities 2 }
psampSystematicTimeBasedSamplingParameterSetTable OBJECT-TYPE
SYNTAX SEQUENCE OF
PsampSystematicTimeBasedSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists configurations of systematic time-
based packet sampling. A parameter set describing a
configuration contains two parameters: the sampling
interval length and the spacing."
::= { psampSystematicTimeBasedSampling 3 }
psampSystematicTimeBasedSamplingParameterSetEntry OBJECT-TYPE
SYNTAX PsampSystematicTimeBasedSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the
psampSystematicTimeBasedSamplingParameterSetTable."
INDEX { psampSystematicTimeBasedSamplingIndex }
::= { psampSystematicTimeBasedSamplingParameterSetTable 1 }
PsampSystematicTimeBasedSamplingParameterSetEntry ::=
SEQUENCE {
psampSystematicTimeBasedSamplingIndex Integer32,
psampSystematicTimeBasedSamplingInterval Integer32,
psampSystematicTimeBasedSamplingSpacing Integer32,
psampSystematicTimeBasedSamplingNext OBJECT IDENTIFIER,
psampSystematicTimeBasedSamplingRowStatus RowStatus
}
psampSystematicTimeBasedSamplingIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index of this parameter set in the
psampSystematicTimeBasedSamplingParameterSetTable.
It is used in entries of the psampInstanceTable as
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reference to this parameter set."
::= { psampSystematicTimeBasedSamplingParameterSetEntry 1 }
psampSystematicTimeBasedSamplingInterval OBJECT-TYPE
SYNTAX Integer32
UNITS "microseconds" -- might still be too coarse grained
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies a sampling
interval for systematic time-based sampling."
REFERENCE
"draft-ietf-psamp-sample-tech-01.txt, Section 5.1"
::= { psampSystematicTimeBasedSamplingParameterSetEntry 2 }
psampSystematicTimeBasedSamplingSpacing OBJECT-TYPE
SYNTAX Integer32
UNITS "microseconds" -- might still be too coarse grained
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies a sampling
spacing for systematic time-based sampling."
REFERENCE
"draft-ietf-psamp-sample-tech-01.txt, Section 5.1"
::= { psampSystematicTimeBasedSamplingParameterSetEntry 3 }
psampSystematicTimeBasedSamplingNext OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the the next sampling
method executed after the current sampling method."
::= { psampSystematicTimeBasedSamplingParameterSetEntry 4 }
psampSystematicTimeBasedSamplingRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampSystematicTimeBasedSamplingParameterSetEntry 5 }
-- Method 3: Random n-out-of-N Sampling
psampRandomOutOfNSampling OBJECT IDENTIFIER ::= { psampMethods 3 }
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psampRandomOutOfNSamplingAvailability OBJECT-TYPE
SYNTAX PsampMethodAvailability
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the availability
of random n-out-of-N sampling at the managed node."
DEFVAL { notAvailable }
::= { psampRandomOutOfNSampling 1 }
psampRandomOutOfNSamplingCapabilities OBJECT IDENTIFIER
::= { psampRandomOutOfNSampling 2 }
-- No capabilities defined, yet.
psampRandomOutOfNSamplingParameterSetTable OBJECT-TYPE
SYNTAX SEQUENCE OF
PsampRandomOutOfNSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists configurations of random n-out-of-N
sampling. A parameter set describing a configuration
contains a single parameter only: the sampling rate."
::= { psampRandomOutOfNSampling 3 }
psampRandomOutOfNSamplingParameterSetEntry OBJECT-TYPE
SYNTAX PsampRandomOutOfNSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the
psampRandomOutOfNSamplingParameterSetTable."
INDEX { psampRandomOutOfNSamplingIndex }
::= { psampRandomOutOfNSamplingParameterSetTable 1 }
PsampRandomOutOfNSamplingParameterSetEntry ::=
SEQUENCE {
psampRandomOutOfNSamplingIndex Integer32,
psampRandomOutOfNSamplingRate Integer32,
psampRandomOutOfNSamplingNext OBJECT IDENTIFIER,
psampRandomOutOfNSamplingRowStatus RowStatus
}
psampRandomOutOfNSamplingIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
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DESCRIPTION
"The index of this parameter set in the
psampRandomOutOfNSamplingParameterSetTable.
It is used in entries of the psampInstanceTable as
reference to this parameter set."
::= { psampRandomOutOfNSamplingParameterSetEntry 1 }
psampRandomOutOfNSamplingRate OBJECT-TYPE
SYNTAX Integer32
UNITS "1/1000000"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies a sampling
rate for random n-out-of-N sampling."
REFERENCE
"draft-ietf-psamp-sample-tech-01.txt, Section 5.2"
::= { psampRandomOutOfNSamplingParameterSetEntry 2 }
psampRandomOutOfNSamplingNext OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the the next sampling
method executed after the current sampling method."
::= { psampRandomOutOfNSamplingParameterSetEntry 3 }
psampRandomOutOfNSamplingRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampRandomOutOfNSamplingParameterSetEntry 4 }
-- Method 4: Random Probabilistic Sampling
psampRandomProbabilisticSampling OBJECT IDENTIFIER ::= { psampMethods 4 }
psampRandomProbabilisticSamplingAvailability OBJECT-TYPE
SYNTAX PsampMethodAvailability
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"When retrieved, this object indicates the availability
of random probabilisticf sampling at the managed node."
DEFVAL { notAvailable }
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::= { psampRandomProbabilisticSampling 1 }
psampRandomProbabilisticSamplingCapabilities OBJECT IDENTIFIER
::= { psampRandomProbabilisticSampling 2 }
-- No capabilities defined, yet.
psampRandomProbabilisticSamplingParameterSetTable OBJECT-TYPE
SYNTAX SEQUENCE OF
PsampRandomProbabilisticSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists configurations of random probabilistic
sampling. A parameter set describing a configuration
contains a single parameter only: the sampling rate."
::= { psampRandomProbabilisticSampling 3 }
psampRandomProbabilisticSamplingParameterSetEntry OBJECT-TYPE
SYNTAX PsampRandomProbabilisticSamplingParameterSetEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the
psampRandomProbabilisticSamplingParameterSetTable."
INDEX { psampRandomProbabilisticSamplingIndex }
::= { psampRandomProbabilisticSamplingParameterSetTable 1 }
PsampRandomProbabilisticSamplingParameterSetEntry ::=
SEQUENCE {
psampRandomProbabilisticSamplingIndex Integer32,
psampRandomProbabilisticSamplingRate Integer32,
psampRandomProbabilisticSamplingNext OBJECT IDENTIFIER,
psampRandomProbabilisticSamplingRowStatus RowStatus
}
psampRandomProbabilisticSamplingIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index of this parameter set in the
psampRandomProbabilisticSamplingParameterSetTable.
It is used in entries of the psampInstanceTable as
reference to this parameter set."
::= { psampRandomProbabilisticSamplingParameterSetEntry 1 }
psampRandomProbabilisticSamplingRate OBJECT-TYPE
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SYNTAX Integer32
UNITS "1/1000000"
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies a sampling
rate for random probabilistic sampling."
REFERENCE
"draft-ietf-psamp-sample-tech-01.txt, Section 5.2"
::= { psampRandomProbabilisticSamplingParameterSetEntry 2 }
psampRandomProbabilisticSamplingNext OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"When retrieved, this object specifies the the next sampling
method executed after the current sampling method."
::= { psampRandomProbabilisticSamplingParameterSetEntry 3 }
psampRandomProbabilisticSamplingRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampRandomProbabilisticSamplingParameterSetEntry 4 }
-- Reporting Group
psampReporting OBJECT IDENTIFIER ::= { psampObjects 2 }
psampCollectorTable OBJECT-TYPE
SYNTAX SEQUENCE OF PsampCollectorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists collectors to which sampled packets are
exported."
::= { psampReporting 1 }
psampCollectorEntry OBJECT-TYPE
SYNTAX PsampCollectorEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the psampCollectorTable."
INDEX { psampCollectorIndex }
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::= { psampCollectorTable 1 }
PsampCollectorEntry ::= SEQUENCE {
psampCollectorIndex Integer32,
psampCollectorTargetIpAddressType InetAddressType,
psampCollectorTargetIpAddress InetAddress,
psampCollectorTargetProtocol Integer32,
psampCollectorTargetPort Integer32,
psampCollectorReportsSent Integer32,
psampCollectorRowStatus RowStatus
}
psampCollectorIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The locally arbitrary, but unique identifier of
a collector.
The value is expected to remain constant at least from one
re-initialization of the entity's network management system
to the next re-initialization."
::= { psampCollectorEntry 1 }
psampCollectorTargetIpAddressType OBJECT-TYPE
SYNTAX InetAddressType
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The IP address type of the collector."
::= { psampCollectorEntry 2 }
psampCollectorTargetIpAddress OBJECT-TYPE
SYNTAX InetAddress
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The IP address of the collector."
::= { psampCollectorEntry 3 }
psampCollectorTargetProtocol OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The transport protocol used for exporting sampled
packets to the collector. Allowed values are ... "
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::= { psampCollectorEntry 4 }
psampCollectorTargetPort OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The port number of the collector."
::= { psampCollectorEntry 5 }
psampCollectorReportsSent OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of reports sent to the collector."
::= { psampCollectorEntry 6 }
psampCollectorRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampCollectorEntry 7 }
psampCollectorGroupTable OBJECT-TYPE
SYNTAX SEQUENCE OF PsampCollectorGroupEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists groups of collectors to which sampled packets are
exported. If sampled packets are exported to only one collector the
group consists of exactly one collector."
::= { psampReporting 2 }
psampCollectorGroupEntry OBJECT-TYPE
SYNTAX PsampCollectorGroupEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the psampCollectorGroupTable."
INDEX { psampCollectorGroupIndex, psampCollectorGroupCollectorIndex }
::= { psampCollectorGroupTable 1 }
PsampCollectorGroupEntry ::= SEQUENCE {
psampCollectorGroupIndex Integer32,
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psampCollectorGroupCollectorIndex Integer32,
psampCollectorGroupRowStatus RowStatus
}
psampCollectorGroupIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The locally arbitrary, but unique identifier of
a collector group.
The value is expected to remain constant at least from one
re-initialization of the entity's network management system
to the next re-initialization."
::= { psampCollectorGroupEntry 1 }
psampCollectorGroupCollectorIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The index of a collector defined in the psampCollectorTable."
::= { psampCollectorGroupEntry 2 }
psampCollectorGroupRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampCollectorGroupEntry 3 }
-- Instance Group
psampInstances OBJECT IDENTIFIER ::= { psampObjects 3 }
psampInstanceTable OBJECT-TYPE
SYNTAX SEQUENCE OF PsampInstanceEntry
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"This table lists active instances of packet sampling at
the managed node."
::= { psampInstances 1 }
psampInstanceEntry OBJECT-TYPE
SYNTAX PsampInstanceEntry
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MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"Defines an entry in the psampInstanceTable."
INDEX { psampInstanceIndex }
::= { psampInstanceTable 1 }
PsampInstanceEntry ::= SEQUENCE {
psampInstanceIndex Integer32,
psampInstanceIfIndex InterfaceIndex,
psampInstanceStartTime DateAndTime,
psampInstanceStopTime DateAndTime,
psampInstanceParameterSet OBJECT IDENTIFIER,
psampInstanceCollectorGroupIndex Integer32,
psampInstancePacketsObserved Integer32,
psampInstanceReportsSent Integer32,
psampInstanceRowStatus RowStatus
}
psampInstanceIndex OBJECT-TYPE
SYNTAX Integer32 (1..2147483647)
MAX-ACCESS not-accessible
STATUS current
DESCRIPTION
"The locally arbitrary, but unique identifier of
an instance.
The value is expected to remain constant at least from one
re-initialization of the entity's network management system
to the next re-initialization."
::= { psampInstanceEntry 1 }
psampInstanceIfIndex OBJECT-TYPE
SYNTAX InterfaceIndex
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"Index of the IP interface at which the packet stream
is observed by packet selection method 1."
::= { psampInstanceEntry 2 }
psampInstanceStartTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The date and time when collecting samples for this parameter
set should start."
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::= { psampInstanceEntry 3 }
psampInstanceStopTime OBJECT-TYPE
SYNTAX DateAndTime
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The date and time when collecting samples for this parameter
set should stop."
::= { psampInstanceEntry 4 }
psampInstanceParameterSet OBJECT-TYPE
SYNTAX OBJECT IDENTIFIER
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The OID of a parameter set in one of the method-specific
tables in the Methods group.
The identified method is applied to the stream of packets
observed at the interface."
::= { psampInstanceEntry 5 }
psampInstanceCollectorGroupIndex OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The index of the collector group to which packet reports are sent."
::= { psampInstanceEntry 6 }
psampInstancePacketsObserved OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of packets observed by method before selecting
packets."
::= { psampInstanceEntry 7 }
psampInstanceReportsSent OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The number of reports on sampled packets sent to the
collector."
::= { psampInstanceEntry 8 }
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psampInstanceRowStatus OBJECT-TYPE
SYNTAX RowStatus
MAX-ACCESS read-create
STATUS current
DESCRIPTION
"The status of this row of the table."
::= { psampInstanceEntry 9 }
-- Conformance information
-- Compliance statements
psampCompliances OBJECT IDENTIFIER ::= { psampConformance 1 }
psampGroups OBJECT IDENTIFIER ::= { psampConformance 2 }
-- Compliance statements
psampCompliance MODULE-COMPLIANCE
STATUS current
DESCRIPTION
"The compliance statement for the PSAMP-MIB."
MODULE -- this module
MANDATORY-GROUPS { psampGroup }
::= { psampCompliances 1 }
-- MIB groupings
psampGroup OBJECT-GROUP
OBJECTS {
psampSelectingAllAvailability,
psampSystematicCountBasedSamplingAvailability,
psampSystematicCountBasedSamplingMaxInterval,
psampSystematicCountBasedSamplingMaxSpacing,
psampSystematicCountBasedSamplingInterval,
psampSystematicCountBasedSamplingSpacing,
psampSystematicCountBasedSamplingNext,
psampSystematicCountBasedSamplingRowStatus,
psampSystematicTimeBasedSamplingAvailability,
psampSystematicTimeBasedSamplingMaxInterval,
psampSystematicTimeBasedSamplingMaxSpacing,
psampSystematicTimeBasedSamplingInterval,
psampSystematicTimeBasedSamplingInterval,
psampSystematicTimeBasedSamplingSpacing,
psampSystematicTimeBasedSamplingNext,
psampSystematicTimeBasedSamplingRowStatus,
psampRandomOutOfNSamplingAvailability,
psampRandomOutOfNSamplingRate,
psampRandomOutOfNSamplingNext,
psampRandomOutOfNSamplingRowStatus,
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psampRandomProbabilisticSamplingAvailability,
psampRandomProbabilisticSamplingRate,
psampRandomProbabilisticSamplingNext,
psampRandomProbabilisticSamplingRowStatus,
psampCollectorTargetIpAddressType,
psampCollectorTargetIpAddress,
psampCollectorTargetProtocol,
psampCollectorTargetPort,
psampCollectorReportsSent,
psampCollectorRowStatus,
psampCollectorGroupRowStatus,
psampInstanceIfIndex,
psampInstanceStartTime,
psampInstanceStopTime,
psampInstanceParameterSet,
psampInstanceCollectorGroupIndex,
psampInstancePacketsObserved,
psampInstanceReportsSent,
psampInstanceRowStatus
}
STATUS current
DESCRIPTION
"The group of all accessible objects of the PSAMP MIB."
::= { psampGroups 1 }
END
5. Security Considerations
There are a number of management objects defined in this MIB module
with 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:
To be done.
6. Open Issues
o describe row status objects to writable tables
o support for reporting from a single instance to multiple
collectors may be refined
o elaborate conformance statements
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o complete security considerations
o observed packets may be expanded to number of packets before
sampling and after sampling or something similar.
o align wording with the other draft documents (e.g. instance vs.
selector)
o ...
7. Acknowledgment
This document is a product of the PSAMP working group.
Normative References
[RFC2578] McCloghrie, K., Perkins, D. and J. Schoenwaelder,
"Structure of Management Information Version 2 (SMIv2)",
STD 58, RFC 2578, April 1999.
[RFC2579] McCloghrie, K., Perkins, D. and J. Schoenwaelder, "Textual
Conventions for SMIv2", STD 58, RFC 2579, April 1999.
[RFC2580] McCloghrie, K., Perkins, D. and J. Schoenwaelder,
"Conformance Statements for SMIv2", STD 58, RFC 2580,
April 1999.
Informative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119, March 1997.
[RFC3410] Case, J., Mundy, R., Partain, D. and B. Stewart,
"Introduction and Applicability Statements for
Internet-Standard Management Framework", RFC 3410,
December 2002.
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Authors' Addresses
Thomas Dietz (editor)
NEC Europte Ltd.
Network Laboratories
Kurfuersten-Anlage 36
69115 Heidelberg
Germany
Phone: +49 6221 90511-28
EMail: dietz@ccrle.nec.de
Dan Romascanu
Avaya Inc.
Atidim Technology Park
Bldg. #3
Tel Aviv, 61131
Israel
Phone: +972-3-545-8414
EMail: dromasca@avaya.com
Benoit Claise
Cisco Systems
De Kleetlaan 6a b1
1831 Degem
Belgium
Phone: +32 2 704 5622
EMail: bclaise@cisco.com
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Dietz, et al. draft-ietf-psamp-mib-01.txt [Page 28]
Internet-Draft PSAMP MIB October 2003
HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF
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Acknowledgment
Funding for the RFC Editor function is currently provided by the
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Dietz, et al. draft-ietf-psamp-mib-01.txt [Page 29]
