Information Model for Packet Sampling Exports
RFC 5477

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Network Working Group                                           T. Dietz
Request for Comments: 5477                               NEC Europe Ltd.
Category: Standards Track                                      B. Claise
                                                               P. Aitken
                                                     Cisco Systems, Inc.
                                                             F. Dressler
                                        University of Erlangen-Nuremberg
                                                                G. Carle
                                          Technical University of Munich
                                                              March 2009

             Information Model for Packet Sampling Exports

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.

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Dietz, et al.               Standards Track                     [Page 1]
RFC 5477                PSAMP Information Model               March 2009

Abstract

   This memo defines an information model for the Packet SAMPling
   (PSAMP) protocol.  It is used by the PSAMP protocol for encoding
   sampled packet data and information related to the Sampling process.
   As the PSAMP protocol is based on the IP Flow Information eXport
   (IPFIX) protocol, this information model is an extension to the IPFIX
   information model.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  3
   2.  PSAMP Documents Overview . . . . . . . . . . . . . . . . . . .  4
   3.  Terminology  . . . . . . . . . . . . . . . . . . . . . . . . .  4
     3.1.  Conventions Used in This Document  . . . . . . . . . . . .  5
   4.  Relationship between PSAMP and IPFIX . . . . . . . . . . . . .  5
   5.  Properties of a PSAMP Information Element  . . . . . . . . . .  5
   6.  Type Space . . . . . . . . . . . . . . . . . . . . . . . . . .  5
   7.  Overloading Information Elements . . . . . . . . . . . . . . .  6
   8.  The PSAMP Information Elements . . . . . . . . . . . . . . . .  6
     8.1.  Identifiers (301-303)  . . . . . . . . . . . . . . . . . .  7
       8.1.1.  selectionSequenceId  . . . . . . . . . . . . . . . . .  7
       8.1.2.  selectorId . . . . . . . . . . . . . . . . . . . . . .  8
       8.1.3.  informationElementId . . . . . . . . . . . . . . . . .  8
     8.2.  Sampling Configuration (304-311) . . . . . . . . . . . . .  9
       8.2.1.  selectorAlgorithm  . . . . . . . . . . . . . . . . . .  9
       8.2.2.  samplingPacketInterval . . . . . . . . . . . . . . . . 11
       8.2.3.  samplingPacketSpace  . . . . . . . . . . . . . . . . . 11
       8.2.4.  samplingTimeInterval . . . . . . . . . . . . . . . . . 12
       8.2.5.  samplingTimeSpace  . . . . . . . . . . . . . . . . . . 12
       8.2.6.  samplingSize . . . . . . . . . . . . . . . . . . . . . 13
       8.2.7.  samplingPopulation . . . . . . . . . . . . . . . . . . 13
       8.2.8.  samplingProbability  . . . . . . . . . . . . . . . . . 13
     8.3.  Hash Configuration (326-334) . . . . . . . . . . . . . . . 14
       8.3.1.  digestHashValue  . . . . . . . . . . . . . . . . . . . 14
       8.3.2.  hashIPPayloadOffset  . . . . . . . . . . . . . . . . . 15
       8.3.3.  hashIPPayloadSize  . . . . . . . . . . . . . . . . . . 15
       8.3.4.  hashOutputRangeMin . . . . . . . . . . . . . . . . . . 15
       8.3.5.  hashOutputRangeMax . . . . . . . . . . . . . . . . . . 16
       8.3.6.  hashSelectedRangeMin . . . . . . . . . . . . . . . . . 16