Overview of Monitoring and Measurement System

in EuQoS multi-domain network

Marek Dabrowski1, Philippe Owezarski2, Wojciech Burakowski1 and Andrzej Beben1

1Institute of Telecommunications, Warsaw University of Technology, Poland2LAAS-CNRS, France

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Outline

Introduction

Architecture of EuQoS MMS MMS for supporting trials MMS for supporting EuQoS system

functions

Exemplary deployment

Summary

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Introduction (1)

The measurements play a key role in modern IP networks, because: IP network becomes more and more complex

many domains administrated by autonomous operators different network technologies, like DiffServ, MPLS, xDSL,

WLAN, LAN, ... evolve towards multi-service networks able to provide

QoS (Quality of Service)

Provide knowledge about the network state useful for: Traffic control, e.g. Measurement based Admission Control Traffic engineering, e.g. provisioning Operation and Maintenance:

Fault detection Network anomaly detection

Therefore, development of effective Monitoring and Measurement System (MMS)

is a crucial part of a system design

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Introduction (2)

What is EuQoS?

6FR EU project: www.ist-euqos.orgObjective: to develop solution for providing end-to-end QoS in multidomain, heterogeneous network

Providers

Corporate

SME

Research

QoS is provided by deployment of end-to-end Classes of Service (CoS), that support specific type of traffics with respect to their QoS requirements

Use measurements to support EuSoS system functions: CAC, TERO, OAM

Take a pragmatic approach

EuQoS Approach

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Introduction (3): EuQoS Architecture

USER 1 USER 2

EQ-SDP

EQ-SIPSignaling

EQ-SIPSignaling

Network technology Independent sub-layer

Network technology dependent sub-layer

EQ-SDP in

End-to-end QoS EQ-SIP signaling

AccessNetwork

1

QoSDomain

i

AccessNetwork

2

QoSDomain

k

QoSDomain

j

RA1 RAkRAjRAiRAn

RM1 RMi RMj RMk RM2n

Virtual Network Layer

Application Application

EQ-SDP

EQ-ETP

Protocols

EQ-ETP

Protocols

EQ-NSIS EQ-NSISEQ-NSIS EQ-NSIS

EQ-SIPproxy

EQ-SIPproxy

Monitoring and Measurement System

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Architecture of EuQoS MMS (1)

The role of EuQoS MMS system is to provide tools for:

performing trials of EuQoS system supporting EuQoS systems functions (CAC, TERO) on-line monitoring of QoS level offered by EuQoS CoSs

(OAM)

The key elements of EuQoS MMS we deal with are: location of the measurement points inside a network design of measurement tools measurement control

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Architecture of EuQoS MMS (2)

AS1

output port

Egress BR

AS2

input ports

Router input port

Ingress BR

Ingress BR

Ingress BR output port

Intra-domain service in AS1

Inter-domain service AS1-AS2

Intra-domain service in AS2

Location of Measurement Points (MP)

Taking into account EuQoS network architecture All measurements are performed on the IP layer Measurement Points are placed in the points where

particular CoS (intra- or inter-domian) begins or ends to operate

AS- Autonomous System

BR – Border Router

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Architecture of EuQoS MMS (3)

Reference location of MPs:In core network:

MPXa – input interface of the ingress border router

MPXb – entrance to the queue of output interface of the ingress border router

MPXc – input interface of the egress border router.

MPXd – entrance to the queue on the output interface of the egress border router

In access network: MPX

t – at IP interface of the user terminal

AS2

Intra-domain measurements

Inter-domain measurements

Intra-domain measurements

Inter-domain measurements

AS3 AS4

MP2a MP2

b MP2d MP3

a MP3b MP3

d MP4b MP4

a

Access network measurements

AS1

MP1t

Access network measurements

MP1d

Inter-domain measurements

MP4t

MP3c MP2

c MP1c

BR BR BR BR BR BR AN4

AN1

AS: Autonomous System BR: Border Router AN: Access Network MP: Measurement Point (reference location)

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MMS for supporting trials (1)

Objective: Validation the QoS level offered by EuQoS CoSs

Methodology: establish a test flow load the network by background

flows up to CAC limit in: Tested CoS Other CoSs

Measure QoS parameters: IPTD, IPDV, IPLR, throughput for the test flow

Tools: BTG: to load the network by aggregated traffic TrTG: to load the network by traffic reproduced from traces Netmeter: for measuring QoS parameters

GEANT

BR

QoS meter (MMS)

QoS meter (MMS)

EuQoS application(or Foreground Traffic Generator)

EuQoS application(or Foreground Traffic Generator)

QoS meter (MMS)

QoS meter (MMS)

BR

Application traffic

EuQoS system 1 EuQoS system 2

Intra-domain CoS monitoring

Inter-domain CoS monitoring

Intra-domain CoS monitoring

Background Traffic Generators (MMS)

Background traffic

Background Traffic Generators (MMS)

Background traffic

End-to-end QoS monitoring

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MMS for supporting trials (2)

Netmeter – tool for measuring QoS parameters One-Way Delay (OWD) IP Delay Variation (IPDV) Packet Loss Ratio (IPLR) throughput MOS aproximation for VoIP

Methodology Uses active measurements,

with MGEN generator Different traffic patterns:

CBR

Poissonian

ON/OFF

greedy TCP

IPDV: IP Packet Delay Variation (IETF IPPM)

OWD: One Way Delay

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MMS for supporting EuQoS system functions (1)

Objective: to support the performance of EuQOS system functions:

Call Admission Control (CAC) MMS provides information about available inter-domain routing

paths and the QoS level offered by them (gathered from EQ-BGP)

MMS provides information about instantaneous load on the inter-domain links used for measurement based admission control

Traffic Engineering and Resource Optimisation: MMS provides load carried inside each CoS used for network

provisioning

Operation & Mantainence On-line monitoring of QoS level (values of IPTD, IPDV, IPLR)

offered by CoSs

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QoS Domain

BR GEANTAccess network equipment

ORENETA Meter

MMS Measurement Controller

LLMT

Terminal

ORENETA AnalyserTMT

ORENETA Meter

MMS

Passive monitoring

Passive monitoring

Passive monitoring

capt

ured

pac

kets captured packets

link load

inte

r-do

ma

in

routin

g ta

ble

EuQoS RM DBEuQoS MMFM

EuQoS system

MMS for supporting EuQoS system functions (2)

MMS Measurement ControllerControlling the toolsCollecting resultsInterface with EuQoS MMFM

TATTAT: Topology Acquisition Tool

LLMTLLMT: Link Load Measurement Tool

ORENETAORENETA: QoS monitoring tool

TAT

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BR1 (BGP)

MMS Measurement Controller

BR2 (BGP)

TMT

EuQoS MMFM

NOTIFY TOPOLOGY

CHANGE <cause>

REQEST TOPOLOGY

TOPOLOGY:

<prefix>

<prefix>

...

SH

OW

IP B

GP

BG

P ro

utin

g ta

ble S

HO

W IP

BG

PB

GP

routing table

TAT: Topology Acquisition Tool

ROUTER_IP |PREFIX |MASK|COS|STATUS|NEXT_HOP |AS_PATH |QOS (EQ-BGP)10.205.0.1|10.203.0.0|16 |1 |BEST |10.203.0.1|65511 |10 32 7 N/A 10.205.0.1|10.203.0.0|16 |2 |BEST |10.203.0.1|65511 |5 16 7 N/A10.205.0.1|10.203.0.0|16 |2 |ALT |10.204.0.1|65510 65509|5 16 7 N/A

TAT: Tool for gathering available inter-domain routing paths

Methodology Periodically reads EQ-BGP

routing tables

Exemplary results

TAT

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LLMT: Link Load Measurement Tool

LLMT Measures average bit rate of carried traffic inside given COS

Methodology Passive monitoring of a given link Capture packets with Tcpdump or DAG cards Count transmitted bytes Calculate average load in intervals of length t

Exemplary results

QoS Domain 1

BRInter-

domain link

QoS Domain 2

BRBR BR

TERO

CAC

Fri 07 Oct 2005 12:16:27 PM CEST-963093000Total available BW (B/s): 99900000Used BW per TOS value (B/s):TOS: 0 Used BW: 100000 TOS: 1 Used BW: 0 TOS: 2 Used BW: 0 TOS: 3 Used BW: 0 TOS: 4 Used BW: 0

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ORENETA: QoS monitoring tool

Tool for on-line monitoring QoS level offered by CoSs

Methodology Passive, on-line

measurements Real Time traffic capture Flow detection

Obtained results One-Way Delay (OWD) IP Delay Variation (IPDV) Packet Loss Ratio (IPLR)

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Exemplary deployment of MMS in WiFi

Problems with deployment of MMS tools Limited access to the routers In case of WiFi it is not possible to use aggregate models of

background traffic as the number of terminals influence results

MP1, MP2, MP3 has installed: Netmeter Oreneta BTG TRTG

MMS Controller TAT Netmeter analyser Oreneta analyser LLMT Controller

Border router

GPS

AP

MMSControler

MP2

MP1

WiFiusers

MP3

Link to other

testbeds

CISCO AIRONET 1200 I WIRELESS ACCESS POINT

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Summary

The paper presents an overview of MMS system designed for EuQoS

There are two groups of MMS tool: tools for trials tools for supporting EuQoS system functions

Developed tools are ready and will be used planned tests