Transport Mappings for Real-time Application Quality-of-Service Monitoring (RAQMON) Protocol Data Unit (PDU)
RFC 4712

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Network Working Group                                        A. Siddiqui
Request for Comments: 4712                                  D. Romascanu
Category: Standards Track                                          Avaya
                                                           E. Golovinsky
                                                             Alert Logic
                                                               M. Rahman
                                     Samsung Information Systems America
                                                                  Y. Kim
                                                                Broadcom
                                                            October 2006

    Transport Mappings for Real-time Application Quality-of-Service
              Monitoring (RAQMON) Protocol Data Unit (PDU)

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 (2006).

Abstract

   This memo specifies two transport mappings of the Real-Time
   Application Quality-of-Service Monitoring (RAQMON) information model
   defined in RFC 4710 using TCP as a native transport and the Simple
   Network Management Protocol (SNMP) to carry the RAQMON information
   from a RAQMON Data Source (RDS) to a RAQMON Report Collector (RRC).

Siddiqui, et al.            Standards Track                     [Page 1]
RFC 4712           Transport Mappings for RAQMON PDU        October 2006

Table of Contents

   1. Introduction ....................................................3
   2. Transporting RAQMON Protocol Data Units .........................3
      2.1. TCP as an RDS/RRC Network Transport Protocol ...............3
           2.1.1. The RAQMON PDU ......................................5
           2.1.2. The BASIC Part of the RAQMON Protocol Data Unit .....7
           2.1.3. APP Part of the RAQMON Protocol Data Unit ..........14
           2.1.4. Byte Order, Alignment, and Time Format of
                  RAQMON PDUs ........................................15
      2.2. Securing RAQMON Session ...................................15
           2.2.1. Sequencing of the Start TLS Operation ..............18
           2.2.2. Closing a TLS Connection ...........................21
      2.3. SNMP Notifications as an RDS/RRC Network Transport
           Protocol ..................................................22
   3. IANA Considerations ............................................38
   4. Congestion-Safe RAQMON Operation ...............................38
   5. Acknowledgements ...............................................39
   6. Security Considerations ........................................39
      6.1. Usage of TLS with RAQMON ..................................41
           6.1.1. Confidentiality & Message Integrity ................41
           6.1.2. TLS CipherSuites ...................................41
           6.1.3. RAQMON Authorization State .........................42
   7. References .....................................................43
      7.1. Normative References ......................................43
      7.2. Informative References ....................................44
   Appendix A. Pseudocode ............................................46

Siddiqui, et al.            Standards Track                     [Page 2]
RFC 4712           Transport Mappings for RAQMON PDU        October 2006

1.  Introduction

   The Real-Time Application QoS Monitoring (RAQMON) Framework, as
   outlined by [RFC4710], extends the Remote Monitoring family of
   protocols (RMON) by defining entities such as RAQMON Data Sources
   RDS) and RAQMON Report Collectors (RRC) to perform various
   application monitoring in real time.  [RFC4710] defines the relevant
   metrics for RAQMON monitoring carried by the common protocol data
   unit (PDU) used between a RDS and RRC to report QoS statistics.  This
   memo contains a syntactical description of the RAQMON PDU structure.

   The following sections of this memo contain detailed specifications
   for the usage of TCP and SNMP to carry RAQMON information.

   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 [RFC2119].

2.  Transporting RAQMON Protocol Data Units

   The RAQMON Protocol Data Unit (PDU) utilizes a common data format
   understood by the RDS and the RRC.  A RAQMON PDU does not transport
   application data but rather occupies the place of a payload
   specification at the application layer of the protocol stack.  As